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 /*
  57  * Report an error in command-line arguments.
  58  */
  59 static void
  60 captype_cmdarg_err(const char *msg_format, va_list ap)
  61 {
  62     fprintf(stderr, "captype: ");
  63     vfprintf(stderr, msg_format, ap);
  64     fprintf(stderr, "\n");
  65 }
  66
  67 /*
  68  * Report additional information for an error in command-line arguments.
  69  */
  70 static void
  71 captype_cmdarg_err_cont(const char *msg_format, va_list ap)
  72 {
  73     vfprintf(stderr, msg_format, ap);
  74     fprintf(stderr, "\n");
  75 }
  76
  77 int
  78 main(int argc, char *argv[])
  79 {
  80     char  *configuration_init_error;
  81     wtap  *wth;
  82     int    err;
  83     char *err_info;
  84     int    i;
  85     int    opt;
  86     int    overall_error_status;
  87     static const struct ws_option long_options[] = {
  88         {"help", ws_no_argument, NULL, 'h'},
  89         {"version", ws_no_argument, NULL, 'v'},
  90         {0, 0, 0, 0 }
  91     };
  92
  93     /*
  94      * Set the C-language locale to the native environment and set the
  95      * code page to UTF-8 on Windows.
  96      */
  97 #ifdef _WIN32
  98     setlocale(LC_ALL, ".UTF-8");
  99 #else
 100     setlocale(LC_ALL, "");
 101 #endif
 102
 103     cmdarg_err_init(captype_cmdarg_err, captype_cmdarg_err_cont);
 104
 105     /* Initialize log handler early so we can have proper logging during startup. */
 106     ws_log_init("captype", vcmdarg_err);
 107
 108     /* Early logging command-line initialization. */
 109     ws_log_parse_args(&argc, argv, vcmdarg_err, 1);
 110
 111     ws_noisy("Finished log init and parsing command line log arguments");
 112
 113     /* Initialize the version information. */
 114     ws_init_version_info("Captype", NULL, NULL);
 115
 116 #ifdef _WIN32
 117     create_app_running_mutex();
 118 #endif /* _WIN32 */
 119
 120     /*
 121      * Get credential information for later use.
 122      */
 123     init_process_policies();
 124
 125     /*
 126      * Attempt to get the pathname of the directory containing the
 127      * executable file.
 128      */
 129     configuration_init_error = configuration_init(argv[0], NULL);
 130     if (configuration_init_error != NULL) {
 131         fprintf(stderr,
 132                 "captype: Can't get pathname of directory containing the captype program: %s.\n",
 133                 configuration_init_error);
 134         g_free(configuration_init_error);
 135     }
 136
 137     init_report_failure_message("captype");
 138
 139     wtap_init(true);
 140
 141     /* Process the options */
 142     while ((opt = ws_getopt_long(argc, argv, "hv", long_options, NULL)) !=-1) {
 143
 144         switch (opt) {
 145
 146             case 'h':
 147                 show_help_header("Print the file types of capture files.");
 148                 print_usage(stdout);
 149                 exit(0);
 150                 break;
 151
 152             case 'v':
 153                 show_version();
 154                 exit(0);
 155                 break;
 156
 157             case '?':              /* Bad flag - print usage message */
 158                 print_usage(stderr);
 159                 exit(1);
 160                 break;
 161         }
 162     }
 163
 164     if (argc < 2) {
 165         print_usage(stderr);
 166         return 1;
 167     }
 168
 169     overall_error_status = 0;
 170
 171     for (i = 1; i < argc; i++) {
 172         wth = wtap_open_offline(argv[i], WTAP_TYPE_AUTO, &err, &err_info, false);
 173
 174         if(wth) {
 175             printf("%s: %s\n", argv[i], wtap_file_type_subtype_name(wtap_file_type_subtype(wth)));
 176             wtap_close(wth);
 177         } else {
 178             if (err == WTAP_ERR_FILE_UNKNOWN_FORMAT)
 179                 printf("%s: unknown\n", argv[i]);
 180             else {
 181                 cfile_open_failure_message(argv[i], err, err_info);
 182                 overall_error_status = 2; /* remember that an error has occurred */
 183             }
 184         }
 185
 186     }
 187
 188     wtap_cleanup();
 189     free_progdirs();
 190     return overall_error_status;
 191 }