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/report_message.h>
  41 #include <wsutil/str_util.h>
  42 #include <wsutil/wslog.h>
  43
  44 #include "ui/failure_message.h"
  45
  46 static void
  47 print_usage(FILE *output)
  48 {
  49     fprintf(output, "\n");
  50     fprintf(output, "Usage: captype [options] <infile> ...\n");
  51     fprintf(output, "\n");
  52     fprintf(output, "Miscellaneous:\n");
  53     fprintf(output, "  -h, --help               display this help and exit\n");
  54     fprintf(output, "  -v, --version            display version info and exit\n");
  55 }
  56
  57 /*
  58  * Report an error in command-line arguments.
  59  */
  60 static void
  61 captype_cmdarg_err(const char *msg_format, va_list ap)
  62 {
  63     fprintf(stderr, "captype: ");
  64     vfprintf(stderr, msg_format, ap);
  65     fprintf(stderr, "\n");
  66 }
  67
  68 /*
  69  * Report additional information for an error in command-line arguments.
  70  */
  71 static void
  72 captype_cmdarg_err_cont(const char *msg_format, va_list ap)
  73 {
  74     vfprintf(stderr, msg_format, ap);
  75     fprintf(stderr, "\n");
  76 }
  77
  78 int
  79 main(int argc, char *argv[])
  80 {
  81     char  *configuration_init_error;
  82     static const struct report_message_routines captype_report_routines = {
  83         failure_message,
  84         failure_message,
  85         open_failure_message,
  86         read_failure_message,
  87         write_failure_message,
  88         cfile_open_failure_message,
  89         cfile_dump_open_failure_message,
  90         cfile_read_failure_message,
  91         cfile_write_failure_message,
  92         cfile_close_failure_message
  93     };
  94     wtap  *wth;
  95     int    err;
  96     gchar *err_info;
  97     int    i;
  98     int    opt;
  99     int    overall_error_status;
 100     static const struct ws_option long_options[] = {
 101         {"help", ws_no_argument, NULL, 'h'},
 102         {"version", ws_no_argument, NULL, 'v'},
 103         {0, 0, 0, 0 }
 104     };
 105
 106     /*
 107      * Set the C-language locale to the native environment and set the
 108      * code page to UTF-8 on Windows.
 109      */
 110 #ifdef _WIN32
 111     setlocale(LC_ALL, ".UTF-8");
 112 #else
 113     setlocale(LC_ALL, "");
 114 #endif
 115
 116     cmdarg_err_init(captype_cmdarg_err, captype_cmdarg_err_cont);
 117
 118     /* Initialize log handler early so we can have proper logging during startup. */
 119     ws_log_init("captype", vcmdarg_err);
 120
 121     /* Early logging command-line initialization. */
 122     ws_log_parse_args(&argc, argv, vcmdarg_err, 1);
 123
 124     ws_noisy("Finished log init and parsing command line log arguments");
 125
 126     /* Initialize the version information. */
 127     ws_init_version_info("Captype", NULL, NULL);
 128
 129 #ifdef _WIN32
 130     create_app_running_mutex();
 131 #endif /* _WIN32 */
 132
 133     /*
 134      * Get credential information for later use.
 135      */
 136     init_process_policies();
 137
 138     /*
 139      * Attempt to get the pathname of the directory containing the
 140      * executable file.
 141      */
 142     configuration_init_error = configuration_init(argv[0], NULL);
 143     if (configuration_init_error != NULL) {
 144         fprintf(stderr,
 145                 "captype: Can't get pathname of directory containing the captype program: %s.\n",
 146                 configuration_init_error);
 147         g_free(configuration_init_error);
 148     }
 149
 150     init_report_message("captype", &captype_report_routines);
 151
 152     wtap_init(TRUE);
 153
 154     /* Process the options */
 155     while ((opt = ws_getopt_long(argc, argv, "hv", long_options, NULL)) !=-1) {
 156
 157         switch (opt) {
 158
 159             case 'h':
 160                 show_help_header("Print the file types of capture files.");
 161                 print_usage(stdout);
 162                 exit(0);
 163                 break;
 164
 165             case 'v':
 166                 show_version();
 167                 exit(0);
 168                 break;
 169
 170             case '?':              /* Bad flag - print usage message */
 171                 print_usage(stderr);
 172                 exit(1);
 173                 break;
 174         }
 175     }
 176
 177     if (argc < 2) {
 178         print_usage(stderr);
 179         return 1;
 180     }
 181
 182     overall_error_status = 0;
 183
 184     for (i = 1; i < argc; i++) {
 185         wth = wtap_open_offline(argv[i], WTAP_TYPE_AUTO, &err, &err_info, FALSE);
 186
 187         if(wth) {
 188             printf("%s: %s\n", argv[i], wtap_file_type_subtype_name(wtap_file_type_subtype(wth)));
 189             wtap_close(wth);
 190         } else {
 191             if (err == WTAP_ERR_FILE_UNKNOWN_FORMAT)
 192                 printf("%s: unknown\n", argv[i]);
 193             else {
 194                 cfile_open_failure_message(argv[i], err, err_info);
 195                 overall_error_status = 2; /* remember that an error has occurred */
 196             }
 197         }
 198
 199     }
 200
 201     wtap_cleanup();
 202     free_progdirs();
 203     return overall_error_status;
 204 }