Move the epan/filesystem.c routines to wsutil; they're not specific to

packet dissection, they're specific to the entire Wireshark suite of
programs.

svn path=/trunk/; revision=53377

5 files changed, 2534 insertions, 1 deletions

diff --git a/wsutil/CMakeLists.txt b/wsutil/CMakeLists.txt
index a2cc259fa5..283bd567a1 100644
--- a/wsutil/CMakeLists.txt
+++ b/wsutil/CMakeLists.txt
@@ -52,6 +52,7 @@ set(WSUTIL_FILES
   crcdrm.c
   des.c
   eax.c
+  filesystem.c
   g711.c
   md4.c
   md5.c
@@ -121,3 +122,17 @@ if(NOT ${ENABLE_STATIC})
 	)
 endif()
 
+add_definitions( -DTOP_SRCDIR=\"${CMAKE_SOURCE_DIR}\" )
+
+#
+# Editor modelines  -  http://www.wireshark.org/tools/modelines.html
+#
+# Local variables:
+# c-basic-offset: 8
+# tab-width: 8
+# indent-tabs-mode: t
+# End:
+#
+# vi: set shiftwidth=8 tabstop=8 noexpandtab:
+# :indentSize=8:tabSize=8:noTabs=false:
+#
diff --git a/wsutil/Makefile.am b/wsutil/Makefile.am
index 8077de8dc0..6ead86a92f 100644
--- a/wsutil/Makefile.am
+++ b/wsutil/Makefile.am
@@ -65,7 +65,8 @@ lib_LTLIBRARIES = libwsutil.la
 libwsutil_la_LDFLAGS = -version-info 0:0:0 @LDFLAGS_SHAREDLIB@
 
 AM_CPPFLAGS = -I$(srcdir)/.. \
-	$(LIBGCRYPT_CFLAGS)
+	$(LIBGCRYPT_CFLAGS) \
+	-DTOP_SRCDIR=\"$(abs_top_srcdir)\"
 
 libwsutil_la_SOURCES =		\
 	$(LIBWSUTIL_SRC)	\
diff --git a/wsutil/Makefile.common b/wsutil/Makefile.common
index 4bf9cfa25f..063c2a95b3 100644
--- a/wsutil/Makefile.common
+++ b/wsutil/Makefile.common
@@ -45,6 +45,7 @@ LIBWSUTIL_SRC = 	\
 	crcdrm.c	\
 	des.c		\
 	eax.c		\
+	filesystem.c	\
 	g711.c		\
 	md4.c		\
 	md5.c		\
@@ -79,6 +80,7 @@ LIBWSUTIL_INCLUDES = 	\
 	crcdrm.h	\
 	des.h		\
 	eax.h		\
+	filesystem.h	\
 	g711.h		\
 	md4.h		\
 	md5.h		\
diff --git a/wsutil/filesystem.c b/wsutil/filesystem.c
new file mode 100644
index 0000000000..fa292da4ce
--- /dev/null
+++ b/wsutil/filesystem.c
@@ -0,0 +1,2209 @@
+/* filesystem.c
+ * Filesystem utility routines
+ *
+ * $Id$
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+
+/*
+ * Required with GNU libc to get dladdr().
+ * We define it here because <dlfcn.h> apparently gets included by
+ * one of the headers we include below.
+ */
+#define _GNU_SOURCE
+
+#ifdef HAVE_DIRENT_H
+#include <dirent.h>
+#endif
+
+#include <stdio.h>
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#include <glib.h>
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+
+#ifdef HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+
+#ifdef _WIN32
+#include <windows.h>
+#include <tchar.h>
+#include <shlobj.h>
+#include <wsutil/unicode-utils.h>
+#else /* _WIN32 */
+#ifdef __APPLE__
+#include <mach-o/dyld.h>
+#endif
+#ifdef __linux__
+#include <sys/utsname.h>
+#endif
+#ifdef __FreeBSD__
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#endif
+#ifdef HAVE_DLADDR
+#include <dlfcn.h>
+#endif
+#include <pwd.h>
+#endif /* _WIN32 */
+
+#include "filesystem.h"
+#include <wsutil/report_err.h>
+#include <wsutil/privileges.h>
+#include <wsutil/file_util.h>
+
+#include <wiretap/wtap.h>   /* for WTAP_ERR_SHORT_WRITE */
+
+#define PROFILES_DIR    "profiles"
+#define PLUGINS_DIR_NAME    "plugins"
+
+#define U3_MY_CAPTURES  "\\My Captures"
+
+char *persconffile_dir = NULL;
+char *persdatafile_dir = NULL;
+char *persconfprofile = NULL;
+
+static gboolean do_store_persconffiles = FALSE;
+static GHashTable *profile_files = NULL;
+
+/*
+ * Given a pathname, return a pointer to the last pathname separator
+ * character in the pathname, or NULL if the pathname contains no
+ * separators.
+ */
+char *
+find_last_pathname_separator(const char *path)
+{
+    char *separator;
+
+#ifdef _WIN32
+    char c;
+
+    /*
+     * We have to scan for '\' or '/'.
+     * Get to the end of the string.
+     */
+    separator = strchr(path, '\0');     /* points to ending '\0' */
+    while (separator > path) {
+        c = *--separator;
+        if (c == '\\' || c == '/')
+            return separator;   /* found it */
+    }
+
+    /*
+     * OK, we didn't find any, so no directories - but there might
+     * be a drive letter....
+     */
+    return strchr(path, ':');
+#else
+    separator = strrchr(path, '/');
+    return separator;
+#endif
+}
+
+/*
+ * Given a pathname, return the last component.
+ */
+const char *
+get_basename(const char *path)
+{
+    const char *filename;
+
+    g_assert(path != NULL);
+    filename = find_last_pathname_separator(path);
+    if (filename == NULL) {
+        /*
+         * There're no directories, drive letters, etc. in the
+         * name; the pathname *is* the file name.
+         */
+        filename = path;
+    } else {
+        /*
+         * Skip past the pathname or drive letter separator.
+         */
+        filename++;
+    }
+    return filename;
+}
+
+/*
+ * Given a pathname, return a string containing everything but the
+ * last component.  NOTE: this overwrites the pathname handed into
+ * it....
+ */
+char *
+get_dirname(char *path)
+{
+    char *separator;
+
+    g_assert(path != NULL);
+    separator = find_last_pathname_separator(path);
+    if (separator == NULL) {
+        /*
+         * There're no directories, drive letters, etc. in the
+         * name; there is no directory path to return.
+         */
+        return NULL;
+    }
+
+    /*
+     * Get rid of the last pathname separator and the final file
+     * name following it.
+     */
+    *separator = '\0';
+
+    /*
+     * "path" now contains the pathname of the directory containing
+     * the file/directory to which it referred.
+     */
+    return path;
+}
+
+/*
+ * Given a pathname, return:
+ *
+ *  the errno, if an attempt to "stat()" the file fails;
+ *
+ *  EISDIR, if the attempt succeeded and the file turned out
+ *  to be a directory;
+ *
+ *  0, if the attempt succeeded and the file turned out not
+ *  to be a directory.
+ */
+
+/*
+ * Visual C++ on Win32 systems doesn't define these.  (Old UNIX systems don't
+ * define them either.)
+ *
+ * Visual C++ on Win32 systems doesn't define S_IFIFO, it defines _S_IFIFO.
+ */
+#ifndef S_ISREG
+#define S_ISREG(mode)   (((mode) & S_IFMT) == S_IFREG)
+#endif
+#ifndef S_IFIFO
+#define S_IFIFO _S_IFIFO
+#endif
+#ifndef S_ISFIFO
+#define S_ISFIFO(mode)  (((mode) & S_IFMT) == S_IFIFO)
+#endif
+#ifndef S_ISDIR
+#define S_ISDIR(mode)   (((mode) & S_IFMT) == S_IFDIR)
+#endif
+
+int
+test_for_directory(const char *path)
+{
+    ws_statb64 statb;
+
+    if (ws_stat64(path, &statb) < 0)
+        return errno;
+
+    if (S_ISDIR(statb.st_mode))
+        return EISDIR;
+    else
+        return 0;
+}
+
+int
+test_for_fifo(const char *path)
+{
+    ws_statb64 statb;
+
+    if (ws_stat64(path, &statb) < 0)
+        return errno;
+
+    if (S_ISFIFO(statb.st_mode))
+        return ESPIPE;
+    else
+        return 0;
+}
+
+/*
+ * Directory from which the executable came.
+ */
+static char *progfile_dir;
+
+#ifdef __APPLE__
+/*
+ * Directory of the application bundle in which we're contained,
+ * if we're contained in an application bundle.  Otherwise, NULL.
+ *
+ * Note: Table 2-5 "Subdirectories of the Contents directory" of
+ *
+ *    https://developer.apple.com/library/mac/documentation/CoreFoundation/Conceptual/CFBundles/BundleTypes/BundleTypes.html#//apple_ref/doc/uid/10000123i-CH101-SW1
+ *
+ * says that the "Frameworks" directory
+ *
+ *    Contains any private shared libraries and frameworks used by the
+ *    executable.  The frameworks in this directory are revision-locked
+ *    to the application and cannot be superseded by any other, even
+ *    newer, versions that may be available to the operating system.  In
+ *    other words, the frameworks included in this directory take precedence
+ *    over any other similarly named frameworks found in other parts of
+ *    the operating system.  For information on how to add private
+ *    frameworks to your application bundle, see Framework Programming Guide.
+ *
+ * so if we were to ship with any frameworks (e.g. Qt) we should
+ * perhaps put them in a Frameworks directory rather than under
+ * Resources.
+ *
+ * It also says that the "PlugIns" directory
+ *
+ *    Contains loadable bundles that extend the basic features of your
+ *    application. You use this directory to include code modules that
+ *    must be loaded into your applicationbs process space in order to
+ *    be used. You would not use this directory to store standalone
+ *    executables.
+ *
+ * Our plugins are just raw .so/.dylib files; I don't know whether by
+ * "bundles" they mean application bundles (i.e., directory hierarchies)
+ * or just "bundles" in the Mach-O sense (which are an image type that
+ * can be loaded with dlopen() but not linked as libraries; our plugins
+ * are, I think, built as dylibs and can be loaded either way).
+ *
+ * And it says that the "SharedSupport" directory
+ *
+ *    Contains additional non-critical resources that do not impact the
+ *    ability of the application to run. You might use this directory to
+ *    include things like document templates, clip art, and tutorials
+ *    that your application expects to be present but that do not affect
+ *    the ability of your application to run.
+ *
+ * I don't think I'd put the files that currently go under Resources/share
+ * into that category; they're not, for example, sample Lua scripts that
+ * don't actually get run by Wireshark, they're configuration/data files
+ * for Wireshark whose absence might not prevent Wireshark from running
+ * but that would affect how it behaves when run.
+ */
+static char *appbundle_dir;
+#endif
+
+/*
+ * TRUE if we're running from the build directory and we aren't running
+ * with special privileges.
+ */
+static gboolean running_in_build_directory_flag = FALSE;
+
+#ifndef _WIN32
+/*
+ * Get the pathname of the executable using various platform-
+ * dependent mechanisms for various UN*Xes.
+ *
+ * These calls all should return something independent of the argv[0]
+ * passed to the program, so it shouldn't be fooled by an argv[0]
+ * that doesn't match the executable path.
+ *
+ * Sadly, not all UN*Xes necessarily have dladdr(), and those that
+ * do don't necessarily have dladdr(main) return information about
+ * the executable image, and those that do aren't necessarily running
+ * on a platform wherein the executable image can get its own path
+ * from the kernel (either by a call or by it being handed to it along
+ * with argv[] and the environment), and those that can don't
+ * necessarily use that to supply the path you get from dladdr(main),
+ * so we try this first and, if that fails, use dladdr(main) if
+ * available.
+ *
+ * In particular, some dynamic linkers supply a dladdr() such that
+ * dladdr(main) just returns something derived from argv[0], so
+ * just using dladdr(main) is the wrong thing to do if there's
+ * another mechanism that can get you a more reliable version of
+ * the executable path.
+ *
+ * However, at least in newer versions of DragonFly BSD, the dynamic
+ * linker *does* get it from the aux vector passed to the program
+ * by the kernel,  readlink /proc/curproc/file - which came first?
+ *
+ * On OpenBSD, dladdr(main) returns a value derived from argv[0],
+ * and there doesn't appear to be any way to get the executable path
+ * from the kernel, so we're out of luck there.
+ *
+ * So, on platforms where some versions have a version of dladdr()
+ * that gives an argv[0]-based path and that also have a mechanism
+ * to get a more reliable version of the path, we try that.  On
+ * other platforms, we return NULL.  If our caller gets back a NULL
+ * from us, it falls back on dladdr(main) if dladdr() is available,
+ * and if that fails or is unavailable, it falls back on processing
+ * argv[0] itself.
+ *
+ * This is not guaranteed to return an absolute path; if it doesn't,
+ * our caller must prepend the current directory if it's a path.
+ *
+ * This is not guaranteed to return the "real path"; it might return
+ * something with symbolic links in the path.  Our caller must
+ * use realpath() if they want the real thing, but that's also true of
+ * something obtained by looking at argv[0].
+ */
+const char *
+get_executable_path(void)
+{
+#if defined(__APPLE__)
+    char *executable_path;
+    uint32_t path_buf_size;
+
+    path_buf_size = PATH_MAX;
+    executable_path = (char *)g_malloc(path_buf_size);
+    if (_NSGetExecutablePath(executable_path, &path_buf_size) == -1) {
+        executable_path = (char *)g_realloc(executable_path, path_buf_size);
+        if (_NSGetExecutablePath(executable_path, &path_buf_size) == -1)
+            return NULL;
+    }
+    return executable_path;
+#elif defined(__linux__)
+    /*
+     * In older versions of GNU libc's dynamic linker, as used on Linux,
+     * dladdr(main) supplies a path based on argv[0], so we use
+     * /proc/self/exe instead; there are Linux distributions with
+     * kernels that support /proc/self/exe and those older versions
+     * of the dynamic linker, and this will get a better answer on
+     * those versions.
+     *
+     * It only works on Linux 2.2 or later, so we just give up on
+     * earlier versions.
+     *
+     * XXX - are there OS versions that support "exe" but not "self"?
+     */
+    struct utsname name;
+    static char executable_path[PATH_MAX];
+
+    if (uname(&name) == -1)
+        return NULL;
+    if (strncmp(name.release, "1.", 2) == 0)
+        return NULL; /* Linux 1.x */
+    if (strcmp(name.release, "2.0") == 0 ||
+        strncmp(name.release, "2.0.", 4) == 0 ||
+        strcmp(name.release, "2.1") == 0 ||
+        strncmp(name.release, "2.1.", 4) == 0)
+        return NULL; /* Linux 2.0.x or 2.1.x */
+    if (readlink("/proc/self/exe", executable_path, sizeof executable_path) == -1)
+        return NULL;
+    return executable_path;
+#elif defined(__FreeBSD__) && defined(KERN_PROC_PATHNAME)
+    /*
+     * In older versions of FreeBSD's dynamic linker, dladdr(main)
+     * supplies a path based on argv[0], so we use the KERN_PROC_PATHNAME
+     * sysctl instead; there are, I think, versions of FreeBSD
+     * that support the sysctl that have and those older versions
+     * of the dynamic linker, and this will get a better answer on
+     * those versions.
+     */
+    int mib[4];
+    char *executable_path;
+    size_t path_buf_size;
+
+    mib[0] = CTL_KERN;
+    mib[1] = KERN_PROC;
+    mib[2] = KERN_PROC_PATHNAME;
+    mib[3] = -1;
+    path_buf_size = PATH_MAX;
+    executable_path = (char *)g_malloc(path_buf_size);
+    if (sysctl(mib, 4, executable_path, &path_buf_size, NULL, 0) == -1) {
+        if (errno != ENOMEM)
+            return NULL;
+        executable_path = (char *)g_realloc(executable_path, path_buf_size);
+        if (sysctl(mib, 4, executable_path, &path_buf_size, NULL, 0) == -1)
+            return NULL;
+    }
+    return executable_path;
+#elif defined(__NetBSD__)
+    /*
+     * In all versions of NetBSD's dynamic linker as of 2013-08-12,
+     * dladdr(main) supplies a path based on argv[0], so we use
+     * /proc/curproc/exe instead.
+     *
+     * XXX - are there OS versions that support "exe" but not "curproc"
+     * or "self"?  Are there any that support "self" but not "curproc"?
+     */
+    static char executable_path[PATH_MAX];
+
+    if (readlink("/proc/curproc/exe", executable_path, sizeof executable_path) == -1)
+        return NULL;
+    return executable_path;
+#elif defined(__DragonFly__)
+    /*
+     * In older versions of DragonFly BSD's dynamic linker, dladdr(main)
+     * supplies a path based on argv[0], so we use /proc/curproc/file
+     * instead; it appears to be supported by all versions of DragonFly
+     * BSD.
+     */
+    static char executable_path[PATH_MAX];
+
+    if (readlink("/proc/curproc/file", executable_path, sizeof executable_path) == -1)
+        return NULL;
+    return executable_path;
+#elif (defined(sun) || defined(__sun)) && defined(HAVE_GETEXECNAME)
+    /*
+     * It appears that getexecname() dates back to at least Solaris 8,
+     * but /proc/{pid}/path is first documented in the Solaris 10 documentation,
+     * so we use getexecname() if available, rather than /proc/self/path/a.out
+     * (which isn't documented, but appears to be a symlink to the
+     * executable image file).
+     */
+    return getexecname();
+#else
+    /* Fill in your favorite UN*X's code here, if there is something */
+    return NULL;
+#endif
+}
+#endif /* _WIN32 */
+
+/*
+ * Get the pathname of the directory from which the executable came,
+ * and save it for future use.  Returns NULL on success, and a
+ * g_mallocated string containing an error on failure.
+ */
+char *
+init_progfile_dir(const char *arg0
+#ifdef _WIN32
+    _U_
+#endif
+, int (*main_addr)(int, char **)
+#if defined(_WIN32) || !defined(HAVE_DLADDR)
+    _U_
+#endif
+)
+{
+#ifdef _WIN32
+    TCHAR prog_pathname_w[_MAX_PATH+2];
+    char *prog_pathname;
+    DWORD error;
+    TCHAR *msg_w;
+    guchar *msg;
+    size_t msglen;
+
+    /*
+     * Attempt to get the full pathname of the currently running
+     * program.
+     */
+    if (GetModuleFileName(NULL, prog_pathname_w, G_N_ELEMENTS(prog_pathname_w)) != 0 && GetLastError() != ERROR_INSUFFICIENT_BUFFER) {
+        /*
+         * XXX - Should we use g_utf16_to_utf8(), as in
+         * getenv_utf8()?
+         */
+        prog_pathname = utf_16to8(prog_pathname_w);
+        /*
+         * We got it; strip off the last component, which would be
+         * the file name of the executable, giving us the pathname
+         * of the directory where the executable resides.
+         */
+        progfile_dir = g_path_get_dirname(prog_pathname);
+        if (progfile_dir != NULL) {
+            return NULL;    /* we succeeded */
+        } else {
+            /*
+             * OK, no. What do we do now?
+             */
+            return g_strdup_printf("No \\ in executable pathname \"%s\"",
+                prog_pathname);
+        }
+    } else {
+        /*
+         * Oh, well.  Return an indication of the error.
+         */
+        error = GetLastError();
+        if (FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS,
+            NULL, error, 0, (LPTSTR) &msg_w, 0, NULL) == 0) {
+            /*
+             * Gak.  We can't format the message.
+             */
+            return g_strdup_printf("GetModuleFileName failed: %u (FormatMessage failed: %u)",
+                error, GetLastError());
+        }
+        msg = utf_16to8(msg_w);
+        LocalFree(msg_w);
+        /*
+         * "FormatMessage()" "helpfully" sticks CR/LF at the
+         * end of the message.  Get rid of it.
+         */
+        msglen = strlen(msg);
+        if (msglen >= 2) {
+            msg[msglen - 1] = '\0';
+            msg[msglen - 2] = '\0';
+        }
+        return g_strdup_printf("GetModuleFileName failed: %s (%u)",
+            msg, error);
+    }
+#else
+#ifdef HAVE_DLADDR
+    Dl_info info;
+#endif
+    const char *execname;
+    char *prog_pathname;
+    char *curdir;
+    long path_max;
+    char *pathstr;
+    char *path_start, *path_end;
+    size_t path_component_len;
+    char *retstr;
+    char *path;
+    char *dir_end;
+
+    /*
+     * Check whether WIRESHARK_RUN_FROM_BUILD_DIRECTORY is set in the
+     * environment; if so, set running_in_build_directory_flag if we
+     * weren't started with special privileges.  (If we were started
+     * with special privileges, it's not safe to allow the user to point
+     * us to some other directory; running_in_build_directory_flag, when
+     * set, causes us to look for plugins and the like in the build
+     * directory.)
+     */
+    if (getenv("WIRESHARK_RUN_FROM_BUILD_DIRECTORY") != NULL
+        && !started_with_special_privs())
+        running_in_build_directory_flag = TRUE;
+
+    execname = get_executable_path();
+#ifdef HAVE_DLADDR
+    if (main_addr != NULL && execname == NULL) {
+        /*
+         * Try to use dladdr() to find the pathname of the executable.
+         * dladdr() is not guaranteed to give you anything better than
+         * argv[0] (i.e., it might not contain a / at all, much less
+         * being an absolute path), and doesn't appear to do so on
+         * Linux, but on other platforms it could give you an absolute
+         * path and obviate the need for us to determine the absolute
+         * path.
+         */
+        if (dladdr((void *)main_addr, &info))
+            execname = info.dli_fname;
+    }
+#endif
+    if (execname == NULL) {
+        /*
+         * OK, guess based on argv[0].
+         */
+        execname = arg0;
+    }
+
+    /*
+     * Try to figure out the directory in which the currently running
+     * program resides, given something purporting to be the executable
+     * name (from dladdr() or from the argv[0] it was started with.
+     * That might be the absolute path of the program, or a path relative
+     * to the current directory of the process that started it, or
+     * just a name for the program if it was started from the command
+     * line and was searched for in $PATH.  It's not guaranteed to be
+     * any of those, however, so there are no guarantees....
+     */
+    if (execname[0] == '/') {
+        /*
+         * It's an absolute path.
+         */
+        prog_pathname = g_strdup(execname);
+    } else if (strchr(execname, '/') != NULL) {
+        /*
+         * It's a relative path, with a directory in it.
+         * Get the current directory, and combine it
+         * with that directory.
+         */
+        path_max = pathconf(".", _PC_PATH_MAX);
+        if (path_max == -1) {
+            /*
+             * We have no idea how big a buffer to
+             * allocate for the current directory.
+             */
+            return g_strdup_printf("pathconf failed: %s\n",
+                g_strerror(errno));
+        }
+        curdir = (char *)g_malloc(path_max);
+        if (getcwd(curdir, path_max) == NULL) {
+            /*
+             * It failed - give up, and just stick
+             * with DATAFILE_DIR.
+             */
+            g_free(curdir);
+            return g_strdup_printf("getcwd failed: %s\n",
+                g_strerror(errno));
+        }
+        path = g_strdup_printf("%s/%s", curdir, execname);
+        g_free(curdir);
+        prog_pathname = path;
+    } else {
+        /*
+         * It's just a file name.
+         * Search the path for a file with that name
+         * that's executable.
+         */
+        prog_pathname = NULL;   /* haven't found it yet */
+        pathstr = getenv("PATH");
+        path_start = pathstr;
+        if (path_start != NULL) {
+            while (*path_start != '\0') {
+                path_end = strchr(path_start, ':');
+                if (path_end == NULL)
+                    path_end = path_start + strlen(path_start);
+                path_component_len = path_end - path_start;
+                path = (char *)g_malloc(path_component_len + 1
+                    + strlen(execname) + 1);
+                memcpy(path, path_start, path_component_len);
+                path[path_component_len] = '\0';
+                strncat(path, "/", 2);
+                strncat(path, execname, strlen(execname) + 1);
+                if (access(path, X_OK) == 0) {
+                    /*
+                     * Found it!
+                     */
+                    prog_pathname = path;
+                    break;
+                }
+
+                /*
+                 * That's not it.  If there are more
+                 * path components to test, try them.
+                 */
+                if (*path_end == '\0') {
+                    /*
+                     * There's nothing more to try.
+                     */
+                    break;
+                }
+                if (*path_end == ':')
+                    path_end++;
+                path_start = path_end;
+                g_free(path);
+            }
+            if (prog_pathname == NULL) {
+                /*
+                 * Program not found in path.
+                 */
+                return g_strdup_printf("\"%s\" not found in \"%s\"",
+                    execname, pathstr);
+            }
+        } else {
+            /*
+             * PATH isn't set.
+             * XXX - should we pick a default?
+             */
+            return g_strdup("PATH isn't set");
+        }
+    }
+
+    /*
+     * OK, we have what we think is the pathname
+     * of the program.
+     *
+     * First, find the last "/" in the directory,
+     * as that marks the end of the directory pathname.
+     */
+    dir_end = strrchr(prog_pathname, '/');
+    if (dir_end != NULL) {
+        /*
+         * Found it.  Strip off the last component,
+         * as that's the path of the program.
+         */
+        *dir_end = '\0';
+
+        /*
+         * Is there a "/.libs" at the end?
+         */
+        dir_end = strrchr(prog_pathname, '/');
+        if (dir_end != NULL) {
+            if (strcmp(dir_end, "/.libs") == 0) {
+                /*
+                 * Yup, it's ".libs".
+                 * Strip that off; it's an
+                 * artifact of libtool.
+                 */
+                *dir_end = '\0';
+
+                /*
+                 * This presumably means we're run from
+                 * the libtool wrapper, which probably
+                 * means we're being run from the build
+                 * directory.  If we weren't started
+                 * with special privileges, set
+                 * running_in_build_directory_flag.
+                 *
+                 * XXX - should we check whether what
+                 * follows ".libs/" begins with "lt-"?
+                 */
+                if (!started_with_special_privs())
+                    running_in_build_directory_flag = TRUE;
+            }
+#ifdef __APPLE__
+            else {
+                if (!started_with_special_privs()) {
+                    /*
+                     * Scan up the path looking for a component
+                     * named "Contents".  If we find it, we assume
+                     * we're in a bundle, and that the top-level
+                     * directory of the bundle is the one containing
+                     * "Contents".
+                     *
+                     * Not all executables are in the Contents/MacOS
+                     * directory, so we can't just check for those
+                     * in the path and strip them off.
+                     *
+                     * XXX - should we assume that it's either
+                     * Contents/MacOS or Resources/bin?
+                     */
+                    char *component_end, *p;
+
+                    component_end = strchr(prog_pathname, '\0');
+                    p = component_end;
+                    for (;;) {
+                        while (p >= prog_pathname && *p != '/')
+                            p--;
+                        if (p == prog_pathname) {
+                            /*
+                             * We're looking at the first component of
+                             * the pathname now, so we're definitely
+                             * not in a bundle, even if we're in
+                             * "/Contents".
+                             */
+                            break;
+                        }
+                        if (strncmp(p, "/Contents", component_end - p) == 0) {
+                            /* Found it. */
+                            appbundle_dir = (char *)g_malloc(p - prog_pathname + 1);
+                            memcpy(appbundle_dir, prog_pathname, p - prog_pathname);
+                            appbundle_dir[p - prog_pathname] = '\0';
+                            break;
+                        }
+                        component_end = p;
+                        p--;
+                    }
+                }
+            }
+#endif
+        }
+
+        /*
+         * OK, we have the path we want.
+         */
+        progfile_dir = prog_pathname;
+        return NULL;
+    } else {
+        /*
+         * This "shouldn't happen"; we apparently
+         * have no "/" in the pathname.
+         * Just free up prog_pathname.
+         */
+        retstr = g_strdup_printf("No / found in \"%s\"", prog_pathname);
+        g_free(prog_pathname);
+        return retstr;
+    }
+#endif
+}
+
+/*
+ * Get the directory in which the program resides.
+ */
+const char *
+get_progfile_dir(void)
+{
+    return progfile_dir;
+}
+
+/*
+ * Get the directory in which the global configuration and data files are
+ * stored.
+ *
+ * On Windows, we use the directory in which the executable for this
+ * process resides.
+ *
+ * On UN*X, we use the DATAFILE_DIR value supplied by the configure
+ * script, unless we think we're being run from the build directory,
+ * in which case we use the directory in which the executable for this
+ * process resides.
+ *
+ * XXX - if we ever make libwireshark a real library, used by multiple
+ * applications (more than just TShark and versions of Wireshark with
+ * various UIs), should the configuration files belong to the library
+ * (and be shared by all those applications) or to the applications?
+ *
+ * If they belong to the library, that could be done on UNIX by the
+ * configure script, but it's trickier on Windows, as you can't just
+ * use the pathname of the executable.
+ *
+ * If they belong to the application, that could be done on Windows
+ * by using the pathname of the executable, but we'd have to have it
+ * passed in as an argument, in some call, on UNIX.
+ *
+ * Note that some of those configuration files might be used by code in
+ * libwireshark, some of them might be used by dissectors (would they
+ * belong to libwireshark, the application, or a separate library?),
+ * and some of them might be used by other code (the Wireshark preferences
+ * file includes resolver preferences that control the behavior of code
+ * in libwireshark, dissector preferences, and UI preferences, for
+ * example).
+ */
+const char *
+get_datafile_dir(void)
+{
+#ifdef _WIN32
+    char *u3deviceexecpath;
+#endif
+    static const char *datafile_dir = NULL;
+
+    if (datafile_dir != NULL)
+        return datafile_dir;
+
+#ifdef _WIN32
+    /*
+     * See if we are running in a U3 environment.
+     */
+    u3deviceexecpath = getenv_utf8("U3_DEVICE_EXEC_PATH");
+
+    if (u3deviceexecpath != NULL) {
+        /*
+         * We are; use the U3 device executable path.
+         */
+        datafile_dir = u3deviceexecpath;
+    } else {
+        /*
+         * Do we have the pathname of the program?  If so, assume we're
+         * running an installed version of the program.  If we fail,
+         * we don't change "datafile_dir", and thus end up using the
+         * default.
+         *
+         * XXX - does NSIS put the installation directory into
+         * "\HKEY_LOCAL_MACHINE\SOFTWARE\Wireshark\InstallDir"?
+         * If so, perhaps we should read that from the registry,
+         * instead.
+         */
+        if (progfile_dir != NULL) {
+            /*
+             * Yes, we do; use that.
+             */
+            datafile_dir = progfile_dir;
+        } else {
+            /*
+             * No, we don't.
+             * Fall back on the default installation directory.
+             */
+            datafile_dir = "C:\\Program Files\\Wireshark\\";
+        }
+    }
+#else
+
+    if (running_in_build_directory_flag) {
+        /*
+         * We're (probably) being run from the build directory and
+         * weren't started with special privileges.
+         *
+         * (running_in_build_directory_flag is never set to TRUE
+         * if we're started with special privileges, so we need
+         * only check it; we don't need to call started_with_special_privs().)
+         *
+         * Use the top-level source directory as the datafile directory
+         * because most of our data files (radius/, COPYING) are there.
+         */
+        datafile_dir = g_strdup(TOP_SRCDIR);
+        return datafile_dir;
+    } else {
+        if (getenv("WIRESHARK_DATA_DIR") && !started_with_special_privs()) {
+            /*
+             * The user specified a different directory for data files
+             * and we aren't running with special privileges.
+             * XXX - We might be able to dispense with the priv check
+             */
+            datafile_dir = g_strdup(getenv("WIRESHARK_DATA_DIR"));
+        }
+#ifdef __APPLE__
+        /*
+         * If we're running from an app bundle and weren't started
+         * with special privileges, use the Contents/Resources/share/wireshark
+         * subdirectory of the app bundle.
+         *
+         * (appbundle_dir is not set to a non-null value if we're
+         * started with special privileges, so we need only check
+         * it; we don't need to call started_with_special_privs().)
+         */
+        else if (appbundle_dir != NULL) {
+            datafile_dir = g_strdup_printf("%s/Contents/Resources/share/wireshark",
+                                           appbundle_dir);
+        }
+#endif
+        else {
+            datafile_dir = DATAFILE_DIR;
+        }
+    }
+
+#endif
+    return datafile_dir;
+}
+
+#ifdef HAVE_PYTHON
+/*
+ * Find the directory where the python dissectors are stored.
+ *
+ * On Windows, we use the "py_dissector" subdirectory of the datafile directory.
+ *
+ * On UN*X, we use the PYTHON_DIR value supplied by the configure
+ * script, unless we think we're being run from the build directory,
+ * in which case we use the "py_dissector" subdirectory of the datafile directory.
+ *
+ * In both cases, we then use the subdirectory of that directory whose
+ * name is the version number.
+ *
+ * XXX - if we think we're being run from the build directory, perhaps we
+ * should have the plugin code not look in the version subdirectory
+ * of the plugin directory, but look in all of the subdirectories
+ * of the plugin directory, so it can just fetch the plugins built
+ * as part of the build process.
+ */
+static const char *wspython_dir = NULL;
+
+static void
+init_wspython_dir(void)
+{
+#ifdef _WIN32
+    /*
+     * On Windows, the data file directory is the installation
+     * directory; the python dissectors are stored under it.
+     *
+     * Assume we're running the installed version of Wireshark;
+     * on Windows, the data file directory is the directory
+     * in which the Wireshark binary resides.
+     */
+        wspython_dir = g_strdup_printf("%s\\python\\%s", get_datafile_dir(),
+                                        VERSION);
+
+    /*
+     * Make sure that pathname refers to a directory.
+     */
+    if (test_for_directory(wspython_dir) != EISDIR) {
+        /*
+         * Either it doesn't refer to a directory or it
+         * refers to something that doesn't exist.
+         *
+         * Assume that means we're running a version of
+         * Wireshark we've built in a build directory,
+         * in which case {datafile dir}\python is the
+         * top-level plugins source directory, and use
+         * that directory and set the "we're running in
+         * a build directory" flag, so the plugin
+         * scanner will check all subdirectories of that
+         * directory for python dissectors.
+         */
+        g_free( (gpointer) wspython_dir);
+        wspython_dir = g_strdup_printf("%s\\python", get_datafile_dir());
+        running_in_build_directory_flag = TRUE;
+    }
+#else
+    if (running_in_build_directory_flag) {
+        /*
+         * We're (probably) being run from the build directory and
+         * weren't started with special privileges, so we'll use
+         * the "python" subdirectory of the datafile directory
+         * (the datafile directory is the build directory).
+         */
+        wspython_dir = g_strdup_printf("%s/epan/wspython/", get_datafile_dir());
+    } else {
+        if (getenv("WIRESHARK_PYTHON_DIR") && !started_with_special_privs()) {
+            /*
+             * The user specified a different directory for plugins
+             * and we aren't running with special privileges.
+             */
+            wspython_dir = g_strdup(getenv("WIRESHARK_PYTHON_DIR"));
+        }
+#ifdef __APPLE__
+        /*
+         * If we're running from an app bundle and weren't started
+         * with special privileges, use the Contents/Resources/lib/wireshark/python
+         * subdirectory of the app bundle.
+         *
+         * (appbundle_dir is not set to a non-null value if we're
+         * started with special privileges, so we need only check
+         * it; we don't need to call started_with_special_privs().)
+         */
+        else if (appbundle_dir != NULL) {
+            wspython_dir = g_strdup_printf("%s/Contents/Resources/lib/wireshark/python",
+                                           appbundle_dir);
+        }
+#endif
+        else {
+            wspython_dir = PYTHON_DIR;
+        }
+    }
+#endif
+}
+#endif /* HAVE_PYTHON */
+
+/*
+ * Get the directory in which the python dissectors are stored.
+ */
+const char *
+get_wspython_dir(void)
+{
+#ifdef HAVE_PYTHON
+    if (!wspython_dir) init_wspython_dir();
+    return wspython_dir;
+#else
+    return NULL;
+#endif
+}
+
+
+#if defined(HAVE_PLUGINS) || defined(HAVE_LUA)
+/*
+ * Find the directory where the plugins are stored.
+ *
+ * On Windows, we use the "plugin" subdirectory of the datafile directory.
+ *
+ * On UN*X, we use the PLUGIN_DIR value supplied by the configure
+ * script, unless we think we're being run from the build directory,
+ * in which case we use the "plugin" subdirectory of the datafile directory.
+ *
+ * In both cases, we then use the subdirectory of that directory whose
+ * name is the version number.
+ *
+ * XXX - if we think we're being run from the build directory, perhaps we
+ * should have the plugin code not look in the version subdirectory
+ * of the plugin directory, but look in all of the subdirectories
+ * of the plugin directory, so it can just fetch the plugins built
+ * as part of the build process.
+ */
+static const char *plugin_dir = NULL;
+
+static void
+init_plugin_dir(void)
+{
+#ifdef _WIN32
+    /*
+     * On Windows, the data file directory is the installation
+     * directory; the plugins are stored under it.
+     *
+     * Assume we're running the installed version of Wireshark;
+     * on Windows, the data file directory is the directory
+     * in which the Wireshark binary resides.
+     */
+    plugin_dir = g_strdup_printf("%s\\plugins\\%s", get_datafile_dir(),
+                     VERSION);
+
+    /*
+     * Make sure that pathname refers to a directory.
+     */
+    if (test_for_directory(plugin_dir) != EISDIR) {
+        /*
+         * Either it doesn't refer to a directory or it
+         * refers to something that doesn't exist.
+         *
+         * Assume that means we're running a version of
+         * Wireshark we've built in a build directory,
+         * in which case {datafile dir}\plugins is the
+         * top-level plugins source directory, and use
+         * that directory and set the "we're running in
+         * a build directory" flag, so the plugin
+         * scanner will check all subdirectories of that
+         * directory for plugins.
+         */
+        g_free( (gpointer) plugin_dir);
+        plugin_dir = g_strdup_printf("%s\\plugins", get_datafile_dir());
+        running_in_build_directory_flag = TRUE;
+    }
+#else
+    if (running_in_build_directory_flag) {
+        /*
+         * We're (probably) being run from the build directory and
+         * weren't started with special privileges, so we'll use
+         * the "plugins" subdirectory of the directory where the program
+         * we're running is (that's the build directory).
+         */
+        plugin_dir = g_strdup_printf("%s/plugins", get_progfile_dir());
+    } else {
+        if (getenv("WIRESHARK_PLUGIN_DIR") && !started_with_special_privs()) {
+            /*
+             * The user specified a different directory for plugins
+             * and we aren't running with special privileges.
+             */
+            plugin_dir = g_strdup(getenv("WIRESHARK_PLUGIN_DIR"));
+        }
+#ifdef __APPLE__
+        /*
+         * If we're running from an app bundle and weren't started
+         * with special privileges, use the Contents/Resources/lib/wireshark/plugins
+         * subdirectory of the app bundle.
+         *
+         * (appbundle_dir is not set to a non-null value if we're
+         * started with special privileges, so we need only check
+         * it; we don't need to call started_with_special_privs().)
+         */
+        else if (appbundle_dir != NULL) {
+            plugin_dir = g_strdup_printf("%s/Contents/Resources/lib/wireshark/plugins",
+                                         appbundle_dir);
+        }
+#endif
+        else {
+            plugin_dir = PLUGIN_DIR;
+        }
+    }
+#endif
+}
+#endif /* HAVE_PLUGINS || HAVE_LUA */
+
+/*
+ * Get the directory in which the plugins are stored.
+ */
+const char *
+get_plugin_dir(void)
+{
+#if defined(HAVE_PLUGINS) || defined(HAVE_LUA)
+    if (!plugin_dir) init_plugin_dir();
+    return plugin_dir;
+#else
+    return NULL;
+#endif
+}
+
+/*
+ * Get the flag indicating whether we're running from a build
+ * directory.
+ */
+gboolean
+running_in_build_directory(void)
+{
+    return running_in_build_directory_flag;
+}
+
+/*
+ * Get the directory in which files that, at least on UNIX, are
+ * system files (such as "/etc/ethers") are stored; on Windows,
+ * there's no "/etc" directory, so we get them from the global
+ * configuration and data file directory.
+ */
+const char *
+get_systemfile_dir(void)
+{
+#ifdef _WIN32
+    return get_datafile_dir();
+#else
+    return "/etc";
+#endif
+}
+
+/*
+ * Name of directory, under the user's home directory, in which
+ * personal configuration files are stored.
+ */
+#ifdef _WIN32
+#define PF_DIR "Wireshark"
+#else
+/*
+ * XXX - should this be ".libepan"? For backwards-compatibility, I'll keep
+ * it ".wireshark" for now.
+ */
+#define PF_DIR ".wireshark"
+#endif
+
+void
+set_profile_name(const gchar *profilename)
+{
+    g_free (persconfprofile);
+
+    if (profilename && strlen(profilename) > 0 &&
+        strcmp(profilename, DEFAULT_PROFILE) != 0) {
+        persconfprofile = g_strdup (profilename);
+    } else {
+        /* Default Profile */
+        persconfprofile = NULL;
+    }
+}
+
+const char *
+get_profile_name(void)
+{
+    if (persconfprofile) {
+        return persconfprofile;
+    } else {
+        return DEFAULT_PROFILE;
+    }
+}
+
+gboolean
+is_default_profile(void)
+{
+    return (!persconfprofile || strcmp(persconfprofile, DEFAULT_PROFILE) == 0) ? TRUE : FALSE;
+}
+
+gboolean
+has_global_profiles(void)
+{
+    WS_DIR *dir;
+    WS_DIRENT *file;
+    const gchar *global_dir = get_global_profiles_dir();
+    gchar *filename;
+    gboolean has_global = FALSE;
+
+    if ((test_for_directory(global_dir) == EISDIR) &&
+        ((dir = ws_dir_open(global_dir, 0, NULL)) != NULL))
+    {
+        while ((file = ws_dir_read_name(dir)) != NULL) {
+            filename = g_strdup_printf ("%s%s%s", global_dir, G_DIR_SEPARATOR_S,
+                            ws_dir_get_name(file));
+            if (test_for_directory(filename) == EISDIR) {
+                has_global = TRUE;
+                g_free (filename);
+                break;
+            }
+            g_free (filename);
+        }
+        ws_dir_close(dir);
+    }
+
+    return has_global;
+}
+
+void
+profile_store_persconffiles(gboolean store)
+{
+    if (store) {
+        profile_files = g_hash_table_new (g_str_hash, g_str_equal);
+    }
+    do_store_persconffiles = store;
+}
+
+/*
+ * Get the directory in which personal configuration files reside;
+ * in UNIX-compatible systems, it's ".wireshark", under the user's home
+ * directory, and on Windows systems, it's "Wireshark", under %APPDATA%
+ * or, if %APPDATA% isn't set, it's "%USERPROFILE%\Application Data"
+ * (which is what %APPDATA% normally is on Windows 2000).
+ */
+static const char *
+get_persconffile_dir_no_profile(void)
+{
+#ifdef _WIN32
+    char *appdatadir;
+    char *userprofiledir;
+    char *altappdatapath;
+#else
+    const char *homedir;
+    struct passwd *pwd;
+#endif
+
+    /* Return the cached value, if available */
+    if (persconffile_dir != NULL)
+        return persconffile_dir;
+
+#ifdef _WIN32
+    /*
+     * See if the user has selected an alternate environment.
+     */
+    altappdatapath = getenv_utf8("WIRESHARK_APPDATA");
+    if (altappdatapath != NULL) {
+        persconffile_dir = altappdatapath;
+        return persconffile_dir;
+    }
+
+    /*
+     * See if we are running in a U3 environment.
+     */
+    altappdatapath = getenv_utf8("U3_APP_DATA_PATH");
+    if (altappdatapath != NULL) {
+        /*
+         * We are; use the U3 application data path.
+         */
+        persconffile_dir = altappdatapath;
+    } else {
+        /*
+         * Use %APPDATA% or %USERPROFILE%, so that configuration
+         * files are stored in the user profile, rather than in
+         * the home directory.  The Windows convention is to store
+         * configuration information in the user profile, and doing
+         * so means you can use Wireshark even if the home directory
+         * is an inaccessible network drive.
+         */
+        appdatadir = getenv_utf8("APPDATA");
+        if (appdatadir != NULL) {
+            /*
+             * Concatenate %APPDATA% with "\Wireshark".
+             */
+            persconffile_dir = g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s",
+                               appdatadir, PF_DIR);
+        } else {
+            /*
+             * OK, %APPDATA% wasn't set, so use
+             * %USERPROFILE%\Application Data.
+             */
+            userprofiledir = getenv_utf8("USERPROFILE");
+            if (userprofiledir != NULL) {
+                persconffile_dir = g_strdup_printf(
+                    "%s" G_DIR_SEPARATOR_S "Application Data" G_DIR_SEPARATOR_S "%s",
+                    userprofiledir, PF_DIR);
+            } else {
+                /*
+                 * Give up and use "C:".
+                 */
+                persconffile_dir = g_strdup_printf("C:" G_DIR_SEPARATOR_S "%s", PF_DIR);
+            }
+        }
+    }
+#else
+    /*
+     * If $HOME is set, use that.
+     */
+    homedir = getenv("HOME");
+    if (homedir == NULL) {
+        /*
+         * Get their home directory from the password file.
+         * If we can't even find a password file entry for them,
+         * use "/tmp".
+         */
+        pwd = getpwuid(getuid());
+        if (pwd != NULL) {
+            homedir = pwd->pw_dir;
+        } else {
+            homedir = "/tmp";
+        }
+    }
+    persconffile_dir = g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s", homedir, PF_DIR);
+#endif
+
+    return persconffile_dir;
+}
+
+const char *
+get_profiles_dir(void)
+{
+    static char *profiles_dir = NULL;
+
+    g_free (profiles_dir);
+    profiles_dir = g_strdup_printf ("%s%s%s", get_persconffile_dir_no_profile (),
+                    G_DIR_SEPARATOR_S, PROFILES_DIR);
+
+    return profiles_dir;
+}
+
+const char *
+get_global_profiles_dir(void)
+{
+    static char *global_profiles_dir = NULL;
+
+    if (!global_profiles_dir) {
+        global_profiles_dir = g_strdup_printf ("%s%s%s", get_datafile_dir(),
+                               G_DIR_SEPARATOR_S, PROFILES_DIR);
+    }
+
+    return global_profiles_dir;
+}
+
+static const char *
+get_persconffile_dir(const gchar *profilename)
+{
+    static char *persconffile_profile_dir = NULL;
+
+    g_free (persconffile_profile_dir);
+
+    if (profilename && strlen(profilename) > 0 &&
+        strcmp(profilename, DEFAULT_PROFILE) != 0) {
+      persconffile_profile_dir = g_strdup_printf ("%s%s%s", get_profiles_dir (),
+                              G_DIR_SEPARATOR_S, profilename);
+    } else {
+      persconffile_profile_dir = g_strdup (get_persconffile_dir_no_profile ());
+    }
+
+    return persconffile_profile_dir;
+}
+
+gboolean
+profile_exists(const gchar *profilename, gboolean global)
+{
+    if (global) {
+        gchar *path = g_strdup_printf ("%s%s%s", get_global_profiles_dir(),
+                           G_DIR_SEPARATOR_S, profilename);
+        if (test_for_directory (path) == EISDIR) {
+            g_free (path);
+            return TRUE;
+        }
+        g_free (path);
+    } else {
+        if (test_for_directory (get_persconffile_dir (profilename)) == EISDIR) {
+            return TRUE;
+        }
+    }
+
+    return FALSE;
+}
+
+static int
+delete_directory (const char *directory, char **pf_dir_path_return)
+{
+    WS_DIR *dir;
+    WS_DIRENT *file;
+    gchar *filename;
+    int ret = 0;
+
+    if ((dir = ws_dir_open(directory, 0, NULL)) != NULL) {
+        while ((file = ws_dir_read_name(dir)) != NULL) {
+            filename = g_strdup_printf ("%s%s%s", directory, G_DIR_SEPARATOR_S,
+                            ws_dir_get_name(file));
+            if (test_for_directory(filename) != EISDIR) {
+                ret = ws_remove(filename);
+#if 0
+            } else {
+                /* The user has manually created a directory in the profile directory */
+                /* I do not want to delete the directory recursively yet */
+                ret = delete_directory (filename, pf_dir_path_return);
+#endif
+            }
+            if (ret != 0) {
+                *pf_dir_path_return = filename;
+                break;
+            }
+            g_free (filename);
+        }
+        ws_dir_close(dir);
+    }
+
+    if (ret == 0 && (ret = ws_remove(directory)) != 0) {
+        *pf_dir_path_return = g_strdup (directory);
+    }
+
+    return ret;
+}
+
+int
+delete_persconffile_profile(const char *profilename, char **pf_dir_path_return)
+{
+    const char *profile_dir = get_persconffile_dir(profilename);
+    int ret = 0;
+
+    if (test_for_directory (profile_dir) == EISDIR) {
+        ret = delete_directory (profile_dir, pf_dir_path_return);
+    }
+
+    return ret;
+}
+
+int
+rename_persconffile_profile(const char *fromname, const char *toname,
+                char **pf_from_dir_path_return, char **pf_to_dir_path_return)
+{
+    char *from_dir = g_strdup (get_persconffile_dir(fromname));
+    char *to_dir = g_strdup (get_persconffile_dir(toname));
+    int ret = 0;
+
+    ret = ws_rename (from_dir, to_dir);
+    if (ret != 0) {
+        *pf_from_dir_path_return = g_strdup (from_dir);
+        *pf_to_dir_path_return = g_strdup (to_dir);
+    }
+
+    g_free (from_dir);
+    g_free (to_dir);
+
+    return ret;
+}
+
+/*
+ * Create the directory that holds personal configuration files, if
+ * necessary.  If we attempted to create it, and failed, return -1 and
+ * set "*pf_dir_path_return" to the pathname of the directory we failed
+ * to create (it's g_mallocated, so our caller should free it); otherwise,
+ * return 0.
+ */
+int
+create_persconffile_profile(const char *profilename, char **pf_dir_path_return)
+{
+    const char *pf_dir_path;
+#ifdef _WIN32
+    char *pf_dir_path_copy, *pf_dir_parent_path;
+    size_t pf_dir_parent_path_len;
+#endif
+    ws_statb64 s_buf;
+    int ret;
+
+    if (profilename) {
+        /*
+         * Create the "Default" personal configuration files directory, if necessary.
+         */
+        if (create_persconffile_profile (NULL, pf_dir_path_return) == -1) {
+            return -1;
+        }
+
+        /*
+         * Check if profiles directory exists.
+         * If not then create it.
+         */
+        pf_dir_path = get_profiles_dir ();
+        if (ws_stat64(pf_dir_path, &s_buf) != 0 && errno == ENOENT) {
+            ret = ws_mkdir(pf_dir_path, 0755);
+            if (ret == -1) {
+                *pf_dir_path_return = g_strdup(pf_dir_path);
+                return ret;
+            }
+        }
+    }
+
+    pf_dir_path = get_persconffile_dir(profilename);
+    if (ws_stat64(pf_dir_path, &s_buf) != 0 && errno == ENOENT) {
+#ifdef _WIN32
+        /*
+         * Does the parent directory of that directory
+         * exist?  %APPDATA% may not exist even though
+         * %USERPROFILE% does.
+         *
+         * We check for the existence of the directory
+         * by first checking whether the parent directory
+         * is just a drive letter and, if it's not, by
+         * doing a "stat()" on it.  If it's a drive letter,
+         * or if the "stat()" succeeds, we assume it exists.
+         */
+        pf_dir_path_copy = g_strdup(pf_dir_path);
+        pf_dir_parent_path = get_dirname(pf_dir_path_copy);
+        pf_dir_parent_path_len = strlen(pf_dir_parent_path);
+        if (pf_dir_parent_path_len > 0
+            && pf_dir_parent_path[pf_dir_parent_path_len - 1] != ':'
+            && ws_stat64(pf_dir_parent_path, &s_buf) != 0) {
+            /*
+             * No, it doesn't exist - make it first.
+             */
+            ret = ws_mkdir(pf_dir_parent_path, 0755);
+            if (ret == -1) {
+                *pf_dir_path_return = pf_dir_parent_path;
+                return -1;
+            }
+        }
+        g_free(pf_dir_path_copy);
+        ret = ws_mkdir(pf_dir_path, 0755);
+#else
+        ret = ws_mkdir(pf_dir_path, 0755);
+#endif
+    } else {
+        /*
+         * Something with that pathname exists; if it's not
+         * a directory, we'll get an error if we try to put
+         * something in it, so we don't fail here, we wait
+         * for that attempt fo fail.
+         */
+        ret = 0;
+    }
+    if (ret == -1)
+        *pf_dir_path_return = g_strdup(pf_dir_path);
+    return ret;
+}
+
+int
+create_persconffile_dir(char **pf_dir_path_return)
+{
+  return create_persconffile_profile(persconfprofile, pf_dir_path_return);
+}
+
+int
+copy_persconffile_profile(const char *toname, const char *fromname, gboolean from_global,
+              char **pf_filename_return, char **pf_to_dir_path_return, char **pf_from_dir_path_return)
+{
+    gchar *from_dir;
+    gchar *to_dir = g_strdup (get_persconffile_dir(toname));
+    gchar *filename, *from_file, *to_file;
+    GList *files, *file;
+
+    if (from_global) {
+        if (strcmp(fromname, DEFAULT_PROFILE) == 0) {
+            from_dir = g_strdup (get_global_profiles_dir());
+        } else {
+            from_dir = g_strdup_printf ("%s%s%s", get_global_profiles_dir(), G_DIR_SEPARATOR_S, fromname);
+        }
+    } else {
+        from_dir = g_strdup (get_persconffile_dir(fromname));
+    }
+
+    files = g_hash_table_get_keys(profile_files);
+    file = g_list_first(files);
+    while (file) {
+        filename = (gchar *)file->data;
+        from_file = g_strdup_printf ("%s%s%s", from_dir, G_DIR_SEPARATOR_S, filename);
+        to_file =  g_strdup_printf ("%s%s%s", to_dir, G_DIR_SEPARATOR_S, filename);
+
+        if (file_exists(from_file) && !copy_file_binary_mode(from_file, to_file)) {
+            *pf_filename_return = g_strdup(filename);
+            *pf_to_dir_path_return = to_dir;
+            *pf_from_dir_path_return = from_dir;
+            g_free (from_file);
+            g_free (to_file);
+            return -1;
+        }
+
+        g_free (from_file);
+        g_free (to_file);
+
+        file = g_list_next(file);
+    }
+
+    g_list_free (files);
+    g_free (from_dir);
+    g_free (to_dir);
+
+    return 0;
+}
+
+/*
+ * Get the (default) directory in which personal data is stored.
+ *
+ * On Win32, this is the "My Documents" folder in the personal profile,
+ * except that, if we're running from a U3 device, this is the
+ * "$U3_DEVICE_DOCUMENT_PATH\My Captures" folder.
+ * On UNIX this is simply the current directory.
+ */
+/* XXX - should this and the get_home_dir() be merged? */
+extern const char *
+get_persdatafile_dir(void)
+{
+#ifdef _WIN32
+    char *u3devicedocumentpath;
+    TCHAR tszPath[MAX_PATH];
+    char *szPath;
+    BOOL bRet;
+
+    /* Return the cached value, if available */
+    if (persdatafile_dir != NULL)
+        return persdatafile_dir;
+
+    /*
+     * See if we are running in a U3 environment.
+     */
+    u3devicedocumentpath = getenv_utf8("U3_DEVICE_DOCUMENT_PATH");
+
+    if (u3devicedocumentpath != NULL) {
+        /* the "My Captures" sub-directory is created (if it doesn't
+           exist) by u3util.exe when the U3 Wireshark is first run */
+
+        szPath = g_strdup_printf("%s%s", u3devicedocumentpath, U3_MY_CAPTURES);
+
+        persdatafile_dir = szPath;
+        return szPath;
+    } else {
+        /*
+         * Hint: SHGetFolderPath is not available on MSVC 6 - without
+         * Platform SDK
+         */
+        bRet = SHGetSpecialFolderPath(NULL, tszPath, CSIDL_PERSONAL,
+            FALSE);
+        if(bRet == TRUE) {
+            szPath = utf_16to8(tszPath);
+            persdatafile_dir = szPath;
+            return szPath;
+        } else {
+            return "";
+        }
+    }
+#else
+    return "";
+#endif
+}
+
+#ifdef _WIN32
+/*
+ * Returns the user's home directory on Win32.
+ */
+static const char *
+get_home_dir(void)
+{
+    static const char *home = NULL;
+    char *homedrive, *homepath;
+    char *homestring;
+    char *lastsep;
+
+    /* Return the cached value, if available */
+    if (home)
+        return home;
+
+    /*
+     * XXX - should we use USERPROFILE anywhere in this process?
+     * Is there a chance that it might be set but one or more of
+     * HOMEDRIVE or HOMEPATH isn't set?
+     */
+    homedrive = getenv_utf8("HOMEDRIVE");
+    if (homedrive != NULL) {
+        homepath = getenv_utf8("HOMEPATH");
+        if (homepath != NULL) {
+            /*
+             * This is cached, so we don't need to worry about
+             * allocating multiple ones of them.
+             */
+            homestring = g_strdup_printf("%s%s", homedrive, homepath);
+
+            /*
+             * Trim off any trailing slash or backslash.
+             */
+            lastsep = find_last_pathname_separator(homestring);
+            if (lastsep != NULL && *(lastsep + 1) == '\0') {
+                /*
+                 * Last separator is the last character
+                 * in the string.  Nuke it.
+                 */
+                *lastsep = '\0';
+            }
+            home = homestring;
+        } else
+            home = homedrive;
+    } else {
+        /*
+         * Give up and use C:.
+         */
+        home = "C:";
+    }
+
+    return home;
+}
+#endif
+
+/*
+ * Construct the path name of a personal configuration file, given the
+ * file name.
+ *
+ * On Win32, if "for_writing" is FALSE, we check whether the file exists
+ * and, if not, construct a path name relative to the ".wireshark"
+ * subdirectory of the user's home directory, and check whether that
+ * exists; if it does, we return that, so that configuration files
+ * from earlier versions can be read.
+ *
+ * The returned file name was g_malloc()'d so it must be g_free()d when the
+ * caller is done with it.
+ */
+char *
+get_persconffile_path(const char *filename, gboolean from_profile)
+{
+    char *path;
+    if (do_store_persconffiles && from_profile && !g_hash_table_lookup (profile_files, filename)) {
+        /* Store filenames so we know which filenames belongs to a configuration profile */
+        g_hash_table_insert (profile_files, g_strdup(filename), g_strdup(filename));
+    }
+
+    if (from_profile) {
+      path = g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s",
+                 get_persconffile_dir(persconfprofile), filename);
+    } else {
+      path = g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s",
+                 get_persconffile_dir(NULL), filename);
+    }
+
+    return path;
+}
+
+/*
+ * process command line option belonging to the filesystem settings
+ * (move this e.g. to main.c and have set_persconffile_dir() instead in this file?)
+ */
+int
+filesystem_opt(int opt _U_, const char *optstr)
+{
+    gchar *p, *colonp;
+
+    colonp = strchr(optstr, ':');
+    if (colonp == NULL) {
+        return 1;
+    }
+
+    p = colonp;
+    *p++ = '\0';
+
+    /*
+    * Skip over any white space (there probably won't be any, but
+    * as we allow it in the preferences file, we might as well
+    * allow it here).
+    */
+    while (isspace((guchar)*p))
+        p++;
+    if (*p == '\0') {
+        /*
+         * Put the colon back, so if our caller uses, in an
+         * error message, the string they passed us, the message
+         * looks correct.
+         */
+        *colonp = ':';
+        return 1;
+    }
+
+    /* directory should be existing */
+    /* XXX - is this a requirement? */
+    if(test_for_directory(p) != EISDIR) {
+        /*
+         * Put the colon back, so if our caller uses, in an
+         * error message, the string they passed us, the message
+         * looks correct.
+         */
+        *colonp = ':';
+        return 1;
+    }
+
+    if (strcmp(optstr,"persconf") == 0) {
+        persconffile_dir = p;
+    } else if (strcmp(optstr,"persdata") == 0) {
+        persdatafile_dir = p;
+        /* XXX - might need to add the temp file path */
+    } else {
+        return 1;
+    }
+    *colonp = ':'; /* put the colon back */
+    return 0;
+}
+
+/*
+ * Construct the path name of a global configuration file, given the
+ * file name.
+ *
+ * The returned file name was g_malloc()'d so it must be g_free()d when the
+ * caller is done with it.
+ */
+char *
+get_datafile_path(const char *filename)
+{
+    if (running_in_build_directory_flag && !strcmp(filename, "AUTHORS-SHORT")) {
+        /* We're running in the build directory and the requested file is a
+         * generated file.  Return the file name in the build directory (not
+         * in the source/data directory).
+         */
+        return g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s", get_progfile_dir(), filename);
+    } else {
+        return g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s", get_datafile_dir(), filename);
+    }
+}
+
+/* Get the personal plugin dir */
+/* Return value is malloced so the caller should g_free() it. */
+char *
+get_plugins_pers_dir(void)
+{
+    return get_persconffile_path(PLUGINS_DIR_NAME, FALSE);
+}
+
+/* Delete a file */
+gboolean
+deletefile(const char *path)
+{
+    return ws_unlink(path) == 0;
+}
+
+/*
+ * Construct and return the path name of a file in the
+ * appropriate temporary file directory.
+ */
+char *get_tempfile_path(const char *filename)
+{
+    return g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s", g_get_tmp_dir(), filename);
+}
+
+/*
+ * Return an error message for UNIX-style errno indications on open or
+ * create operations.
+ */
+const char *
+file_open_error_message(int err, gboolean for_writing)
+{
+    const char *errmsg;
+    static char errmsg_errno[1024+1];
+
+    switch (err) {
+
+    case ENOENT:
+        if (for_writing)
+            errmsg = "The path to the file \"%s\" doesn't exist.";
+        else
+            errmsg = "The file \"%s\" doesn't exist.";
+        break;
+
+    case EACCES:
+        if (for_writing)
+            errmsg = "You don't have permission to create or write to the file \"%s\".";
+        else
+            errmsg = "You don't have permission to read the file \"%s\".";
+        break;
+
+    case EISDIR:
+        errmsg = "\"%s\" is a directory (folder), not a file.";
+        break;
+
+    case ENOSPC:
+        errmsg = "The file \"%s\" could not be created because there is no space left on the file system.";
+        break;
+
+#ifdef EDQUOT
+    case EDQUOT:
+        errmsg = "The file \"%s\" could not be created because you are too close to, or over, your disk quota.";
+        break;
+#endif
+
+    case EINVAL:
+        errmsg = "The file \"%s\" could not be created because an invalid filename was specified.";
+        break;
+
+    case ENOMEM:
+        /*
+         * The problem probably has nothing to do with how much RAM the
+         * user has on their machine, so don't confuse them by saying
+         * "memory".  The problem is probably either virtual address
+         * space or swap space.
+         */
+#if GLIB_SIZEOF_VOID_P == 4
+        /*
+         * ILP32; we probably ran out of virtual address space.
+         */
+#define ENOMEM_REASON "it can't be handled by a 32-bit application"
+#else
+        /*
+         * LP64 or LLP64; we probably ran out of swap space.
+         */
+#if defined(_WIN32)
+        /*
+         * You need to make the pagefile bigger.
+         */
+#define ENOMEM_REASON "the pagefile is too small"
+#elif defined(__APPLE__)
+        /*
+         * dynamic_pager couldn't, or wouldn't, create more swap files.
+         */
+#define ENOMEM_REASON "your system ran out of swap file space"
+#else
+        /*
+         * Either you have a fixed swap partition or a fixed swap file,
+         * and it needs to be made bigger.
+         *
+         * This is UN*X, but it's not OS X, so we assume the user is
+         * *somewhat* nerdy.
+         */
+#define ENOMEM_REASON "your system is out of swap space"
+#endif
+#endif /* GLIB_SIZEOF_VOID_P == 4 */
+        if (for_writing)
+            errmsg = "The file \"%s\" could not be created because " ENOMEM_REASON ".";
+        else
+            errmsg = "The file \"%s\" could not be opened because " ENOMEM_REASON ".";
+        break;
+
+    default:
+        g_snprintf(errmsg_errno, sizeof(errmsg_errno),
+               "The file \"%%s\" could not be %s: %s.",
+               for_writing ? "created" : "opened",
+               g_strerror(err));
+        errmsg = errmsg_errno;
+        break;
+    }
+    return errmsg;
+}
+
+/*
+ * Return an error message for UNIX-style errno indications on write
+ * operations.
+ */
+const char *
+file_write_error_message(int err)
+{
+    const char *errmsg;
+    static char errmsg_errno[1024+1];
+
+    switch (err) {
+
+    case ENOSPC:
+        errmsg = "The file \"%s\" could not be saved because there is no space left on the file system.";
+        break;
+
+#ifdef EDQUOT
+    case EDQUOT:
+        errmsg = "The file \"%s\" could not be saved because you are too close to, or over, your disk quota.";
+        break;
+#endif
+
+    default:
+        g_snprintf(errmsg_errno, sizeof(errmsg_errno),
+               "An error occurred while writing to the file \"%%s\": %s.",
+               g_strerror(err));
+        errmsg = errmsg_errno;
+        break;
+    }
+    return errmsg;
+}
+
+
+gboolean
+file_exists(const char *fname)
+{
+    ws_statb64 file_stat;
+
+    if (!fname) {
+        return FALSE;
+    }
+
+#ifdef _WIN32
+    /*
+     * This is a bit tricky on win32. The st_ino field is documented as:
+     * "The inode, and therefore st_ino, has no meaning in the FAT, ..."
+     * but it *is* set to zero if stat() returns without an error,
+     * so this is working, but maybe not quite the way expected. ULFL
+     */
+    file_stat.st_ino = 1;   /* this will make things work if an error occurred */
+    ws_stat64(fname, &file_stat);
+    if (file_stat.st_ino == 0) {
+        return TRUE;
+    } else {
+        return FALSE;
+    }
+#else
+    if (ws_stat64(fname, &file_stat) != 0 && errno == ENOENT) {
+        return FALSE;
+    } else {
+        return TRUE;
+    }
+#endif
+}
+
+/*
+ * Check that the from file is not the same as to file
+ * We do it here so we catch all cases ...
+ * Unfortunately, the file requester gives us an absolute file
+ * name and the read file name may be relative (if supplied on
+ * the command line), so we can't just compare paths. From Joerg Mayer.
+ */
+gboolean
+files_identical(const char *fname1, const char *fname2)
+{
+    /* Two different implementations, because:
+     *
+     * - _fullpath is not available on UN*X, so we can't get full
+     *   paths and compare them (which wouldn't work with hard links
+     *   in any case);
+     *
+     * - st_ino isn't filled in with a meaningful value on Windows.
+     */
+#ifdef _WIN32
+    char full1[MAX_PATH], full2[MAX_PATH];
+
+    /*
+     * Get the absolute full paths of the file and compare them.
+     * That won't work if you have hard links, but those aren't
+     * much used on Windows, even though NTFS supports them.
+     *
+     * XXX - will _fullpath work with UNC?
+     */
+    if( _fullpath( full1, fname1, MAX_PATH ) == NULL ) {
+        return FALSE;
+    }
+
+    if( _fullpath( full2, fname2, MAX_PATH ) == NULL ) {
+        return FALSE;
+    }
+
+    if(strcmp(full1, full2) == 0) {
+        return TRUE;
+    } else {
+        return FALSE;
+    }
+#else
+    ws_statb64 filestat1, filestat2;
+
+    /*
+     * Compare st_dev and st_ino.
+     */
+    if (ws_stat64(fname1, &filestat1) == -1)
+        return FALSE;   /* can't get info about the first file */
+    if (ws_stat64(fname2, &filestat2) == -1)
+        return FALSE;   /* can't get info about the second file */
+    return (filestat1.st_dev == filestat2.st_dev &&
+        filestat1.st_ino == filestat2.st_ino);
+#endif
+}
+
+/*
+ * Copy a file in binary mode, for those operating systems that care about
+ * such things.  This should be OK for all files, even text files, as
+ * we'll copy the raw bytes, and we don't look at the bytes as we copy
+ * them.
+ *
+ * Returns TRUE on success, FALSE on failure. If a failure, it also
+ * displays a simple dialog window with the error message.
+ */
+gboolean
+copy_file_binary_mode(const char *from_filename, const char *to_filename)
+{
+    int           from_fd, to_fd, err;
+    ssize_t       nread, nwritten;
+    guint8        *pd = NULL;
+
+    /* Copy the raw bytes of the file. */
+    from_fd = ws_open(from_filename, O_RDONLY | O_BINARY, 0000 /* no creation so don't matter */);
+    if (from_fd < 0) {
+        report_open_failure(from_filename, errno, FALSE);
+        goto done;
+    }
+
+    /* Use open() instead of creat() so that we can pass the O_BINARY
+       flag, which is relevant on Win32; it appears that "creat()"
+       may open the file in text mode, not binary mode, but we want
+       to copy the raw bytes of the file, so we need the output file
+       to be open in binary mode. */
+    to_fd = ws_open(to_filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0644);
+    if (to_fd < 0) {
+        report_open_failure(to_filename, errno, TRUE);
+        ws_close(from_fd);
+        goto done;
+    }
+
+#define FS_READ_SIZE 65536
+    pd = (guint8 *)g_malloc(FS_READ_SIZE);
+    while ((nread = ws_read(from_fd, pd, FS_READ_SIZE)) > 0) {
+        nwritten = ws_write(to_fd, pd, nread);
+        if (nwritten < nread) {
+            if (nwritten < 0)
+                err = errno;
+            else
+                err = WTAP_ERR_SHORT_WRITE;
+            report_write_failure(to_filename, err);
+            ws_close(from_fd);
+            ws_close(to_fd);
+            goto done;
+        }
+    }
+    if (nread < 0) {
+        err = errno;
+        report_read_failure(from_filename, err);
+        ws_close(from_fd);
+        ws_close(to_fd);
+        goto done;
+    }
+    ws_close(from_fd);
+    if (ws_close(to_fd) < 0) {
+        report_write_failure(to_filename, errno);
+        goto done;
+    }
+
+    g_free(pd);
+    pd = NULL;
+    return TRUE;
+
+done:
+    g_free(pd);
+    return FALSE;
+}
+
+/*
+ * Editor modelines
+ *
+ * Local Variables:
+ * c-basic-offset: 4
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * ex: set shiftwidth=4 tabstop=8 expandtab:
+ * :indentSize=4:tabSize=8:noTabs=true:
+ */
diff --git a/wsutil/filesystem.h b/wsutil/filesystem.h
new file mode 100644
index 0000000000..6b76bab4fc
--- /dev/null
+++ b/wsutil/filesystem.h
@@ -0,0 +1,306 @@
+/* filesystem.h
+ * Filesystem utility definitions
+ *
+ * $Id$
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef FILESYSTEM_H
+#define FILESYSTEM_H
+
+#include "ws_symbol_export.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/*
+ * Default profile name.
+ */
+#define DEFAULT_PROFILE      "Default"
+
+
+/*
+ * Get the pathname of the directory from which the executable came,
+ * and save it for future use.  Returns NULL on success, and a
+ * g_mallocated string containing an error on failure.
+ */
+WS_DLL_PUBLIC char *init_progfile_dir(const char *arg0, int (*main)(int, char **));
+
+/*
+ * Get the directory in which the program resides.
+ */
+WS_DLL_PUBLIC const char *get_progfile_dir(void);
+
+/*
+ * Get the directory in which plugins are stored; this must not be called
+ * before init_progfile_dir() is called, as they might be stored in a
+ * subdirectory of the program file directory.
+ */
+WS_DLL_PUBLIC const char *get_plugin_dir(void);
+
+/*
+ * Get the directory in which python plugins are stored; this must not be
+ * called before init_progfile_dir() is called, as they might be stored in a
+ * subdirectory of the program file directory.
+ */
+WS_DLL_PUBLIC const char *get_wspython_dir(void);
+
+/*
+ * Get the flag indicating whether we're running from a build
+ * directory.
+ */
+WS_DLL_PUBLIC gboolean running_in_build_directory(void);
+
+/*
+ * Get the directory in which global configuration files are
+ * stored.
+ */
+WS_DLL_PUBLIC const char *get_datafile_dir(void);
+
+/*
+ * Construct the path name of a global configuration file, given the
+ * file name.
+ *
+ * The returned file name was g_malloc()'d so it must be g_free()d when the
+ * caller is done with it.
+ */
+WS_DLL_PUBLIC char *get_datafile_path(const char *filename);
+
+/*
+ * Get the personal plugin dir.
+ */
+WS_DLL_PUBLIC char *get_plugins_pers_dir(void);
+
+/*
+ * Get the directory in which files that, at least on UNIX, are
+ * system files (such as "/etc/ethers") are stored; on Windows,
+ * there's no "/etc" directory, so we get them from the Wireshark
+ * global configuration and data file directory.
+ */
+WS_DLL_PUBLIC const char *get_systemfile_dir(void);
+
+/*
+ * Set the configuration profile name to be used for storing
+ * personal configuration files.
+ */
+WS_DLL_PUBLIC void set_profile_name(const gchar *profilename);
+
+/*
+ * Get the current configuration profile name used for storing
+ * personal configuration files.
+ */
+WS_DLL_PUBLIC const char *get_profile_name(void);
+
+/*
+ * Check if current profile is default profile.
+ */
+WS_DLL_PUBLIC gboolean is_default_profile(void);
+
+/*
+ * Check if we have global profiles.
+ */
+WS_DLL_PUBLIC gboolean has_global_profiles(void);
+
+/*
+ * Get the directory used to store configuration profile directories.
+ */
+WS_DLL_PUBLIC const char *get_profiles_dir(void);
+
+/*
+ * Get the directory used to store global configuration profile directories.
+ */
+WS_DLL_PUBLIC const char *get_global_profiles_dir(void);
+
+
+/*
+ * Store filenames used for personal config files so we know which
+ * files to copy when duplicate a configuration profile.
+ */
+WS_DLL_PUBLIC void profile_store_persconffiles(gboolean store);
+
+/*
+ * Check if given configuration profile exists.
+ */
+WS_DLL_PUBLIC gboolean profile_exists(const gchar *profilename, gboolean global);
+
+/*
+ * Create a directory for the given configuration profile.
+ * If we attempted to create it, and failed, return -1 and
+ * set "*pf_dir_path_return" to the pathname of the directory we failed
+ * to create (it's g_mallocated, so our caller should free it); otherwise,
+ * return 0.
+ */
+WS_DLL_PUBLIC int create_persconffile_profile(const char *profilename,
+				       char **pf_dir_path_return);
+
+/*
+ * Delete the directory for the given configuration profile.
+ * If we attempted to delete it, and failed, return -1 and
+ * set "*pf_dir_path_return" to the pathname of the directory we failed
+ * to delete (it's g_mallocated, so our caller should free it); otherwise,
+ * return 0.
+ */
+WS_DLL_PUBLIC int delete_persconffile_profile(const char *profilename,
+				       char **pf_dir_path_return);
+
+/*
+ * Rename the directory for the given confinguration profile.
+ */
+WS_DLL_PUBLIC int rename_persconffile_profile(const char *fromname, const char *toname,
+				       char **pf_from_dir_path_return,
+				       char **pf_to_dir_path_return);
+
+/*
+ * Copy files in one profile to the other.
+ */
+WS_DLL_PUBLIC int copy_persconffile_profile(const char *toname, const char *fromname,
+				     gboolean from_global,
+				     char **pf_filename_return,
+				     char **pf_to_dir_path_return,
+				     char **pf_from_dir_path_return);
+
+/*
+ * Create the directory that holds personal configuration files, if
+ * necessary.  If we attempted to create it, and failed, return -1 and
+ * set "*pf_dir_path_return" to the pathname of the directory we failed
+ * to create (it's g_mallocated, so our caller should free it); otherwise,
+ * return 0.
+ */
+WS_DLL_PUBLIC int create_persconffile_dir(char **pf_dir_path_return);
+
+/*
+ * Construct the path name of a personal configuration file, given the
+ * file name.  If using configuration profiles this directory will be
+ * used if "from_profile" is TRUE.
+ *
+ * The returned file name was g_malloc()'d so it must be g_free()d when the
+ * caller is done with it.
+ */
+WS_DLL_PUBLIC char *get_persconffile_path(const char *filename, gboolean from_profile);
+
+/*
+ * Get the (default) directory in which personal data is stored.
+ *
+ * On Win32, this is the "My Documents" folder in the personal profile.
+ * On UNIX this is simply the current directory.
+ */
+WS_DLL_PUBLIC const char *get_persdatafile_dir(void);
+
+/*
+ * Construct the path name of a file in $TMP/%TEMP% directory.
+ * Or "/tmp/<filename>" (C:\<filename>) if that fails.
+ *
+ * Return value is g_malloced so the caller should g_free it.
+ */
+WS_DLL_PUBLIC char *get_tempfile_path(const char *filename);
+
+/*
+ * process command line option belonging to the filesystem settings
+ */
+WS_DLL_PUBLIC int filesystem_opt(int opt, const char *optstr);
+
+/*
+ * Return an error message for UNIX-style errno indications on open or
+ * create operations.
+ */
+WS_DLL_PUBLIC const char *file_open_error_message(int err, gboolean for_writing);
+
+/*
+ * Return an error message for UNIX-style errno indications on write
+ * operations.
+ */
+WS_DLL_PUBLIC const char *file_write_error_message(int err);
+
+/*
+ * Given a pathname, return the last component.
+ */
+WS_DLL_PUBLIC const char *get_basename(const char *);
+
+ /*
+  * Given a pathname, return a pointer to the last pathname separator
+  * character in the pathname, or NULL if the pathname contains no
+  * separators.
+  */
+WS_DLL_PUBLIC char *find_last_pathname_separator(const char *path);
+
+/*
+ * Given a pathname, return a string containing everything but the
+ * last component.  NOTE: this overwrites the pathname handed into
+ * it....
+ */
+WS_DLL_PUBLIC char *get_dirname(char *);
+
+/*
+ * Given a pathname, return:
+ *
+ *	the errno, if an attempt to "stat()" the file fails;
+ *
+ *	EISDIR, if the attempt succeeded and the file turned out
+ *	to be a directory;
+ *
+ *	0, if the attempt succeeded and the file turned out not
+ *	to be a directory.
+ */
+WS_DLL_PUBLIC int test_for_directory(const char *);
+
+/*
+ * Given a pathname, return:
+ *
+ *	the errno, if an attempt to "stat()" the file fails;
+ *
+ *	ESPIPE, if the attempt succeeded and the file turned out
+ *	to be a FIFO;
+ *
+ *	0, if the attempt succeeded and the file turned out not
+ *	to be a FIFO.
+ */
+WS_DLL_PUBLIC int test_for_fifo(const char *);
+
+/* Delete a file */
+WS_DLL_PUBLIC gboolean deletefile (const char *path);
+
+/*
+ * Check, if file is existing.
+ */
+WS_DLL_PUBLIC gboolean file_exists(const char *fname);
+
+/*
+ * Check if two filenames are identical (with absolute and relative paths).
+ */
+WS_DLL_PUBLIC gboolean files_identical(const char *fname1, const char *fname2);
+
+/*
+ * Copy a file in binary mode, for those operating systems that care about
+ * such things.  This should be OK for all files, even text files, as
+ * we'll copy the raw bytes, and we don't look at the bytes as we copy
+ * them.
+ *
+ * Returns TRUE on success, FALSE on failure. If a failure, it also
+ * displays a simple dialog window with the error message.
+ */
+WS_DLL_PUBLIC gboolean copy_file_binary_mode(const char *from_filename,
+    const char *to_filename);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* FILESYSTEM_H */