Add a routine to check whether a file is a directory or not.

To test whether a file the user selected to be opened from the file
selection box is really a directory (so that we can point the file
selection box at it, rather than trying to open the directory as a
capture file, which wouldn't work), use the routine in question.

To make the GTK+ file selection box start out in the last directory from
which we opened a file, use "gtk_file_selection_complete()", rather than
"chdir()"ing to that directory.

Those changes keep us from "chdir()"ing all over the place; that way, if
Ethereal dumps core, the core dump shows up in the directory from which
it was run, rather than in the directory from which you last opened or
into which you last saved a file.

svn path=/trunk/; revision=2190

1 files changed, 46 insertions, 1 deletions

diff --git a/util.c b/util.c
index f49053c6bb..e6a2ce0611 100644
--- a/util.c
+++ b/util.c
@@ -1,7 +1,7 @@
 /* util.c
  * Utility routines
  *
- * $Id: util.c,v 1.39 2000/03/21 06:51:59 guy Exp $
+ * $Id: util.c,v 1.40 2000/07/31 04:53:31 guy Exp $
  *
  * Ethereal - Network traffic analyzer
  * By Gerald Combs <gerald@zing.org>
@@ -93,6 +93,51 @@ typedef int mode_t;	/* for win32 */
 #endif
 
 /*
+ * 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)
+{
+	struct stat statb;
+
+	if (stat(path, &statb) < 0)
+		return errno;
+
+	if (S_ISDIR(statb.st_mode))
+		return EISDIR;
+	else
+		return 0;
+}
+
+/*
  * Given a pathname, return a pointer to the last pathname separator
  * character in the pathname, or NULL if the pathname contains no
  * separators.