captype.c

   1 /* captype.c
   2  * Reports capture file type
   3  *
   4  * Based on capinfos.c
   5  * Copyright 2004 Ian Schorr
   6  *
   7  * Wireshark - Network traffic analyzer
   8  * By Gerald Combs <gerald@wireshark.org>
   9  * Copyright 1998 Gerald Combs
  10  *
  11  * SPDX-License-Identifier: GPL-2.0-or-later
  12  */
  13
  14 #include <config.h>
  15 #define WS_LOG_DOMAIN  LOG_DOMAIN_MAIN
  16
  17 #include <stdio.h>
  18 #include <stdlib.h>
  19 #include <string.h>
  20 #include <stdarg.h>
  21 #include <locale.h>
  22
  23 #include <wsutil/ws_getopt.h>
  24
  25 #include <glib.h>
  26
  27 #include <wiretap/wtap.h>
  28
  29 #include <wsutil/cmdarg_err.h>
  30 #include <wsutil/file_util.h>
  31 #include <wsutil/filesystem.h>
  32 #include <wsutil/privileges.h>
  33 #include <cli_main.h>
  34 #include <wsutil/version_info.h>
  35
  36 #ifdef HAVE_PLUGINS
  37 #include <wsutil/plugins.h>
  38 #endif
  39
  40 #include <wsutil/str_util.h>
  41 #include <wsutil/wslog.h>
  42
  43 #include "ui/failure_message.h"
  44
  45 static void
  46 print_usage(FILE *output)
  47 {
  48     fprintf(output, "\n");
  49     fprintf(output, "Usage: captype [options] <infile> ...\n");
  50     fprintf(output, "\n");
  51     fprintf(output, "Miscellaneous:\n");
  52     fprintf(output, "  -h, --help               display this help and exit\n");
  53     fprintf(output, "  -v, --version            display version info and exit\n");
  54 }
  55
  56 int
  57 main(int argc, char *argv[])
  58 {
  59     char  *configuration_init_error;
  60     wtap  *wth;
  61     int    err;
  62     char *err_info;
  63     int    i;
  64     int    opt;
  65     int    overall_error_status;
  66     static const struct ws_option long_options[] = {
  67         {"help", ws_no_argument, NULL, 'h'},
  68         {"version", ws_no_argument, NULL, 'v'},
  69         {0, 0, 0, 0 }
  70     };
  71
  72     /* Set the program name. */
  73     g_set_prgname("captype");
  74
  75     /*
  76      * Set the C-language locale to the native environment and set the
  77      * code page to UTF-8 on Windows.
  78      */
  79 #ifdef _WIN32
  80     setlocale(LC_ALL, ".UTF-8");
  81 #else
  82     setlocale(LC_ALL, "");
  83 #endif
  84
  85     cmdarg_err_init(stderr_cmdarg_err, stderr_cmdarg_err_cont);
  86
  87     /* Initialize log handler early so we can have proper logging during startup. */
  88     ws_log_init(vcmdarg_err);
  89
  90     /* Early logging command-line initialization. */
  91     ws_log_parse_args(&argc, argv, vcmdarg_err, 1);
  92
  93     ws_noisy("Finished log init and parsing command line log arguments");
  94
  95 #ifdef _WIN32
  96     create_app_running_mutex();
  97 #endif /* _WIN32 */
  98
  99     /*
 100      * Get credential information for later use.
 101      */
 102     init_process_policies();
 103
 104     /*
 105      * Attempt to get the pathname of the directory containing the
 106      * executable file.
 107      */
 108     configuration_init_error = configuration_init(argv[0]);
 109     if (configuration_init_error != NULL) {
 110         fprintf(stderr,
 111                 "captype: Can't get pathname of directory containing the captype program: %s.\n",
 112                 configuration_init_error);
 113         g_free(configuration_init_error);
 114     }
 115
 116     /* Initialize the version information. */
 117     ws_init_version_info("Captype", NULL, NULL);
 118
 119     init_report_failure_message("captype");
 120
 121     wtap_init(true);
 122
 123     /* Process the options */
 124     while ((opt = ws_getopt_long(argc, argv, "hv", long_options, NULL)) !=-1) {
 125
 126         switch (opt) {
 127
 128             case 'h':
 129                 show_help_header("Print the file types of capture files.");
 130                 print_usage(stdout);
 131                 exit(0);
 132                 break;
 133
 134             case 'v':
 135                 show_version();
 136                 exit(0);
 137                 break;
 138
 139             case '?':              /* Bad flag - print usage message */
 140                 print_usage(stderr);
 141                 exit(1);
 142                 break;
 143         }
 144     }
 145
 146     if (argc < 2) {
 147         print_usage(stderr);
 148         return 1;
 149     }
 150
 151     overall_error_status = 0;
 152
 153     for (i = 1; i < argc; i++) {
 154         wth = wtap_open_offline(argv[i], WTAP_TYPE_AUTO, &err, &err_info, false);
 155
 156         if(wth) {
 157             printf("%s: %s\n", argv[i], wtap_file_type_subtype_name(wtap_file_type_subtype(wth)));
 158             wtap_close(wth);
 159         } else {
 160             if (err == WTAP_ERR_FILE_UNKNOWN_FORMAT)
 161                 printf("%s: unknown\n", argv[i]);
 162             else {
 163                 cfile_open_failure_message(argv[i], err, err_info);
 164                 overall_error_status = 2; /* remember that an error has occurred */
 165             }
 166         }
 167
 168     }
 169
 170     wtap_cleanup();
 171     free_progdirs();
 172     return overall_error_status;
 173 }