diff options
Diffstat (limited to 'file.c')
| -rw-r--r-- | file.c | 192 |
1 files changed, 173 insertions, 19 deletions
@@ -1,7 +1,7 @@ /* file.c * File I/O routines * - * $Id: file.c,v 1.25 1999/05/11 20:07:47 gram Exp $ + * $Id: file.c,v 1.26 1999/06/12 09:10:19 guy Exp $ * * Ethereal - Network traffic analyzer * By Gerald Combs <gerald@zing.org> @@ -96,14 +96,10 @@ open_cap_file(char *fname, capture_file *cf) { struct stat cf_stat; /* First, make sure the file is valid */ - if (stat(fname, &cf_stat)) { - simple_dialog(ESD_TYPE_WARN, NULL, "File does not exist."); - return 1; - } - if (! S_ISREG(cf_stat.st_mode) && ! S_ISFIFO(cf_stat.st_mode)) { - simple_dialog(ESD_TYPE_WARN, NULL, "The file you have chosen is invalid."); - return 1; - } + if (stat(fname, &cf_stat)) + return (errno); + if (! S_ISREG(cf_stat.st_mode) && ! S_ISFIFO(cf_stat.st_mode)) + return (OPEN_CAP_FILE_NOT_REGULAR); /* Next, try to open the file */ cf->fh = fopen(fname, "r"); @@ -156,8 +152,10 @@ open_cap_file(char *fname, capture_file *cf) { if (cf->wth == NULL) { #endif - simple_dialog(ESD_TYPE_WARN, NULL, "Could not open file."); - return 1; + /* XXX - we assume that, because we were able to open it above, + this must have failed because it's not a capture file in + a format we can read. */ + return (OPEN_CAP_FILE_UNKNOWN_FORMAT); } #ifndef WITH_WIRETAP @@ -184,14 +182,11 @@ open_cap_file(char *fname, capture_file *cf) { cf->snap = pcap_snapshot(cf->pfh); cf->lnk_t = pcap_datalink(cf->pfh); } else if (ntohl(magic[0]) == SNOOP_MAGIC_1 && ntohl(magic[1]) == SNOOP_MAGIC_2) { - simple_dialog(ESD_TYPE_WARN, NULL, "The snoop format is not yet supported."); - return 1; + return (OPEN_CAP_FILE_UNKNOWN_FORMAT); } - if (cf->cd_t == CD_UNKNOWN) { - simple_dialog(ESD_TYPE_WARN, NULL, "Can't determine file type."); - return 1; - } + if (cf->cd_t == CD_UNKNOWN) + return (OPEN_CAP_FILE_UNKNOWN_FORMAT); #else if (cf->dfilter) { if (wtap_offline_filter(cf->wth, cf->dfilter) < 0) { @@ -204,7 +199,7 @@ open_cap_file(char *fname, capture_file *cf) { cf->snap = wtap_snapshot_length(cf->wth); #endif - return 0; + return (0); } /* Reset everything to a pristine state */ @@ -250,7 +245,7 @@ load_cap_file(char *fname, capture_file *cf) { close_cap_file(cf, info_bar, file_ctx); - /* Initialize protocol-speficic variables */ + /* Initialize protocol-specific variables */ ncp_init_protocol(); if ((name_ptr = (gchar *) strrchr(fname, '/')) == NULL) @@ -562,3 +557,162 @@ pcap_dispatch_cb(u_char *user, const struct pcap_pkthdr *phdr, cf->plist = cf->plist->next; } + +/* Tries to mv a file. If unsuccessful, tries to cp the file. + * Returns 0 on failure to do either, 1 on success of either + */ +int +file_mv(char *from, char *to) +{ + +#define COPY_BUFFER_SIZE 8192 + + int retval; + + /* try a hard link */ + retval = link(from, to); + + /* or try a copy */ + if (retval < 0) { + retval = file_cp(from, to); + if (!retval) { + return 0; + } + } + + unlink(from); + return 1; +} + +/* Copies a file. + * Returns 0 on failure to do either, 1 on success of either + */ +int +file_cp(char *from, char *to) +{ + +#define COPY_BUFFER_SIZE 8192 + + int from_fd, to_fd, nread, nwritten; + char *buffer; + gint dialogue_button = ESD_BTN_OK; + + buffer = g_malloc(COPY_BUFFER_SIZE); + + from_fd = open(from, O_RDONLY); + if (from_fd < 0) { + simple_dialog(ESD_TYPE_WARN, &dialogue_button, + file_open_error_message(errno, TRUE), from); + return 0; + } + + to_fd = creat(to, 0644); + if (to_fd < 0) { + simple_dialog(ESD_TYPE_WARN, &dialogue_button, + file_open_error_message(errno, TRUE), to); + close(from_fd); + return 0; + } + + while( (nread = read(from_fd, buffer, COPY_BUFFER_SIZE)) > 0) { + nwritten = write(to_fd, buffer, nread); + if (nwritten < nread) { + if (nwritten < 0) { + simple_dialog(ESD_TYPE_WARN, &dialogue_button, + file_write_error_message(errno), to); + } else { + simple_dialog(ESD_TYPE_WARN, &dialogue_button, +"The file \"%s\" could not be saved: tried writing %d, wrote %d.\n", + to, nread, nwritten); + } + close(from_fd); + close(to_fd); + return 0; + } + } + if (nread < 0) { + simple_dialog(ESD_TYPE_WARN, &dialogue_button, + file_read_error_message(errno), from); + close(from_fd); + close(to_fd); + return 0; + } + close(from_fd); + close(to_fd); + + return 1; +} + +char * +file_open_error_message(int err, int for_writing) +{ + char *errmsg; + static char errmsg_errno[1024+1]; + + switch (err) { + + case OPEN_CAP_FILE_NOT_REGULAR: + errmsg = "The file \"%s\" is invalid."; + break; + + case OPEN_CAP_FILE_UNKNOWN_FORMAT: + errmsg = "The file \"%s\" is not a capture file in a format Ethereal understands."; + break; + + case ENOENT: + if (for_writing) + errmsg = "The path to the file \"%s\" does not exist."; + else + errmsg = "The file \"%s\" does not exist."; + break; + + case EACCES: + if (for_writing) + errmsg = "You do not have permission to create or write to the file \"%s\"."; + else + errmsg = "You do not have permission to open the file \"%s\"."; + break; + + default: + sprintf(errmsg_errno, "The file \"%%s\" could not be opened: %s.", strerror(err)); + errmsg = errmsg_errno; + break; + } + return errmsg; +} + +char * +file_read_error_message(int err) +{ + static char errmsg_errno[1024+1]; + + sprintf(errmsg_errno, "An error occurred while reading from the file \"%%s\": %s.", strerror(err)); + return errmsg_errno; +} + +char * +file_write_error_message(int err) +{ + 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: + sprintf(errmsg_errno, "An error occurred while writing to the file \"%%s\": %s.", strerror(err)); + errmsg = errmsg_errno; + break; + } + return errmsg; +} + |