bash/bbs/utils/fm/fm/fm.c

   1 /* Copyright (C) 2008 Ricardo Catalinas Jiménez <jimenezrick@gmail.com>
   2  *
   3  * This program is free software: you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation, either version 3 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  */
  16
  17 #include "fm.h"
  18
  19 char *program_name;
  20
  21 void clean_up(void)
  22 {
  23 #ifdef INOTIFY
  24         stop_inotify();
  25 #endif
  26         g_list_free(lines);
  27         destroy_directory_content(tree_root);
  28         free_node_data(tree_root, NULL);
  29         g_node_destroy(tree_root);
  30 }
  31
  32 void print_errno_and_exit(int last_errno, char *file, int line)
  33 {
  34         char *message_format = "%s (%s:%i)";
  35         char *message;
  36
  37         endwin();
  38         message = g_strdup_printf(message_format, program_name, file, line);
  39         errno = last_errno;
  40         perror(message);
  41         free(message);
  42         exit(EXIT_FAILURE);
  43 }
  44
  45 void handle_sigsegv(int signal_number)
  46 {
  47         endwin();
  48         fprintf(stderr, "%s\n", g_strsignal(SIGSEGV));
  49         exit(EXIT_FAILURE);
  50 }
  51
  52 void handle_sigint(int signal_number)
  53 {
  54         endwin();
  55         exit(EXIT_SUCCESS);
  56 }
  57
  58 void set_sighandlers(void)
  59 {
  60         struct sigaction act;
  61
  62         act.sa_handler = handle_sigsegv;
  63         sigemptyset(&act.sa_mask);
  64         act.sa_flags = 0;
  65         sigaction(SIGSEGV, &act, NULL);
  66
  67         act.sa_handler = handle_sigint;
  68         sigaction(SIGINT, &act, NULL);
  69
  70         act.sa_handler = handle_sigwinch;
  71         sigaction(SIGWINCH, &act, NULL);
  72 }
  73
  74 void unset_sighandlers(void)
  75 {
  76         struct sigaction act;
  77
  78         act.sa_handler = SIG_IGN;
  79         sigemptyset(&act.sa_mask);
  80         act.sa_flags = 0;
  81
  82         sigaction(SIGSEGV, &act, NULL);
  83         sigaction(SIGINT, &act, NULL);
  84         sigaction(SIGWINCH, &act, NULL);
  85 }
  86
  87 void print_usage(void)
  88 {
  89         printf("Usage: %s [-h|-d] [<tree_root>]\n", program_name);
  90         printf("The root of the displayed tree is `tree_root'.\n");
  91         printf("\t-h: show this help\n\t-d: print on stderr inotify events debug info\n");
  92 }
  93
  94 int main(int argc, char *argv[])
  95 {
  96         program_name = argv[0];
  97         if (argc > 1 && !strcmp(argv[1], "-h")) {
  98                 print_usage();
  99                 return 0;
 100         } else if ((argc == 2 || argc == 3) && !strcmp(argv[1], "-d")) {
 101 #ifdef INOTIFY
 102                 debug_inotify = TRUE;
 103 #endif
 104         } else if ((argc > 3 && !strcmp(argv[1], "-d")) || argc > 2) {
 105                 fprintf(stderr, "%s: invalid option\n", program_name);
 106                 print_usage();
 107                 return 1;
 108         }
 109         if (setlocale(LC_ALL, "") == NULL)
 110                 fprintf(stderr, "Error: Can't set the specified locale\n");
 111
 112         set_sighandlers();
 113         if (argc == 1)
 114                 init_ui(NULL);
 115         else if (argc == 2 && !strcmp(argv[1], "-d"))
 116                 init_ui(NULL);
 117         else if (argc == 2)
 118                 init_ui(argv[1]);
 119         else
 120                 init_ui(argv[2]);
 121
 122         for (;;) {
 123                 get_key();
 124                 refresh_screen();
 125         }
 126
 127         return 0;
 128 }