ROX-Filer/src/main.c

   1 /*
   2  * $Id$
   3  *
   4  * ROX-Filer, filer for the ROX desktop project
   5  * Copyright (C) 2000, Thomas Leonard, <tal197@ecs.soton.ac.uk>.
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  19  * Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include "config.h"
  23
  24 #include <stdlib.h>
  25 #include <stdio.h>
  26 #include <sys/types.h>
  27 #include <signal.h>
  28 #include <sys/wait.h>
  29 #include <unistd.h>
  30 #include <fcntl.h>
  31 #include <pwd.h>
  32 #include <grp.h>
  33
  34 #ifdef HAVE_GETOPT_LONG
  35 #  include <getopt.h>
  36 #endif
  37
  38 #include <gtk/gtk.h>
  39 #include "collection.h"
  40
  41 #include "main.h"
  42 #include "support.h"
  43 #include "gui_support.h"
  44 #include "filer.h"
  45 #include "mount.h"
  46 #include "menu.h"
  47 #include "dnd.h"
  48 #include "options.h"
  49 #include "choices.h"
  50 #include "type.h"
  51 #include "pixmaps.h"
  52 #include "dir.h"
  53 #include "action.h"
  54
  55 int number_of_windows = 0;      /* Quit when this reaches 0 again... */
  56 int to_error_log = -1;          /* Write here to log errors */
  57
  58 uid_t euid;
  59 gid_t egid;
  60 int ngroups;                    /* Number of supplemental groups */
  61 gid_t *supplemental_groups = NULL;
  62 char *home_dir;
  63
  64 /* Static prototypes */
  65 static void show_features(void);
  66
  67
  68 #define VERSION "ROX-Filer 0.1.20\n"                                    \
  69                 "Copyright (C) 2000 Thomas Leonard.\n"                  \
  70                 "ROX-Filer comes with ABSOLUTELY NO WARRANTY,\n"        \
  71                 "to the extent permitted by law.\n"                     \
  72                 "You may redistribute copies of ROX-Filer\n"            \
  73                 "under the terms of the GNU General Public License.\n"  \
  74                 "For more information about these matters, "            \
  75                 "see the file named COPYING.\n"
  76
  77 #ifdef HAVE_GETOPT_LONG
  78 #  define USAGE   "Try `ROX-Filer/AppRun --help' for more information.\n"
  79 #  define SHORT_ONLY_WARNING ""
  80 #else
  81 #  define USAGE   "Try `ROX-Filer/AppRun -h' for more information.\n"
  82 #  define SHORT_ONLY_WARNING    \
  83                 "NOTE: Your system does not support long options - \n" \
  84                 "you must use the short versions instead.\n\n"
  85 #endif
  86
  87 #define SHORT_OPS "t:b:ohv"
  88
  89 #define HELP "Usage: ROX-Filer/AppRun [OPTION]... [DIR]...\n"           \
  90        "Open filer windows showing each directory listed, or $HOME \n"  \
  91        "if no directories are given.\n\n"                               \
  92        "  -h, --help            display this help and exit\n"                 \
  93        "  -v, --version         display the version information and exit\n"   \
  94        "  -t, --top [DIR]       open DIR as a top-edge panel\n"         \
  95        "  -b, --bottom [DIR]    open DIR as a bottom-edge panel\n"      \
  96        "  -o, --override        override window manager control of panels\n" \
  97        "\n"     SHORT_ONLY_WARNING                                      \
  98        "Report bugs to <tal197@ecs.soton.ac.uk>.\n"
  99
 100 #ifdef HAVE_GETOPT_LONG
 101 static struct option long_opts[] =
 102 {
 103         {"top", 1, NULL, 't'},
 104         {"bottom", 1, NULL, 'b'},
 105         {"override", 0, NULL, 'o'},
 106         {"help", 0, NULL, 'h'},
 107         {"version", 0, NULL, 'v'},
 108         {NULL, 0, NULL, 0},
 109 };
 110 #endif
 111
 112 /* Take control of panels away from WM? */
 113 gboolean override_redirect = FALSE;
 114
 115 /* Maps child PIDs to Callback pointers */
 116 static GHashTable *death_callbacks = NULL;
 117 static gboolean child_died_flag = FALSE;
 118
 119 /* This is called as a signal handler; simply ensures that
 120  * child_died_callback() will get called later.
 121  */
 122 static void child_died(int signum)
 123 {
 124         child_died_flag = TRUE;
 125         write(to_error_log, '\0', 1);   /* Wake up! */
 126 }
 127
 128 static void child_died_callback(void)
 129 {
 130         int             status;
 131         int             child;
 132
 133         child_died_flag = FALSE;
 134
 135         /* Find out which children exited and allow them to die */
 136         do
 137         {
 138                 Callback        *cb;
 139
 140                 child = waitpid(-1, &status, WNOHANG);
 141
 142                 if (child == 0 || child == -1)
 143                         return;
 144
 145                 cb = g_hash_table_lookup(death_callbacks, (gpointer) child);
 146                 if (cb)
 147                 {
 148                         cb->callback(cb->data);
 149                         g_hash_table_remove(death_callbacks, (gpointer) child);
 150                 }
 151
 152         } while (1);
 153 }
 154
 155 #define BUFLEN 40
 156 void stderr_cb(gpointer data, gint source, GdkInputCondition condition)
 157 {
 158         char buf[BUFLEN];
 159         static GtkWidget *log = NULL;
 160         static GtkWidget *window = NULL;
 161         ssize_t len;
 162
 163         if (!window)
 164         {
 165                 GtkWidget       *hbox, *scrollbar;
 166
 167                 window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 168                 gtk_window_set_title(GTK_WINDOW(window),
 169                                                 "ROX-Filer message log");
 170                 gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
 171                 gtk_window_set_default_size(GTK_WINDOW(window), 600, 300);
 172                 gtk_signal_connect_object(GTK_OBJECT(window), "delete_event",
 173                                 gtk_widget_hide, GTK_OBJECT(window));
 174
 175
 176                 hbox = gtk_hbox_new(FALSE, 0);
 177                 gtk_container_add(GTK_CONTAINER(window), hbox);
 178                 scrollbar = gtk_vscrollbar_new(NULL);
 179
 180                 log = gtk_text_new(NULL,
 181                                 gtk_range_get_adjustment(GTK_RANGE(scrollbar)));
 182                 gtk_box_pack_start(GTK_BOX(hbox), log, TRUE, TRUE, 0);
 183                 gtk_box_pack_start(GTK_BOX(hbox), scrollbar, FALSE, TRUE, 0);
 184         }
 185
 186         len = read(source, buf, BUFLEN);
 187
 188         if (child_died_flag)
 189         {
 190                 child_died_callback();
 191                 if (len == 1 && !*buf)
 192                         return;
 193         }
 194
 195         if (len > 0)
 196         {
 197                 if (!GTK_WIDGET_MAPPED(window))
 198                         gtk_widget_show_all(window);
 199                 gtk_text_insert(GTK_TEXT(log), NULL, NULL, NULL, buf, len);
 200         }
 201 }
 202
 203 int main(int argc, char **argv)
 204 {
 205         int              stderr_pipe[2];
 206         struct sigaction act;
 207         GList           *panel_dirs = NULL;
 208         GList           *panel_sides = NULL;
 209
 210         i18n_init();
 211
 212         home_dir = g_get_home_dir();
 213         death_callbacks = g_hash_table_new(NULL, NULL);
 214
 215 #ifdef HAVE_LIBVFS
 216         mc_vfs_init();
 217 #endif
 218         gtk_init(&argc, &argv);
 219
 220         while (1)
 221         {
 222                 int     c;
 223 #ifdef HAVE_GETOPT_LONG
 224                 int     long_index;
 225                 c = getopt_long(argc, argv, SHORT_OPS,
 226                                 long_opts, &long_index);
 227 #else
 228                 c = getopt(argc, argv, SHORT_OPS);
 229 #endif
 230
 231                 if (c == EOF)
 232                         break;          /* No more options */
 233
 234                 switch (c)
 235                 {
 236                         case 'o':
 237                                 override_redirect = TRUE;
 238                                 break;
 239                         case 'v':
 240                                 printf(VERSION);
 241                                 show_features();
 242                                 return EXIT_SUCCESS;
 243                         case 'h':
 244                                 printf(HELP);
 245                                 return EXIT_SUCCESS;
 246                         case 't':
 247                         case 'b':
 248                                 panel_sides = g_list_prepend(panel_sides,
 249                                                         (gpointer) c);
 250                                 panel_dirs = g_list_prepend(panel_dirs,
 251                                                 *optarg == '=' ? optarg + 1
 252                                                         : optarg);
 253                                 break;
 254                         default:
 255                                 printf(USAGE);
 256                                 return EXIT_FAILURE;
 257                 }
 258         }
 259
 260         choices_init();
 261
 262         gui_support_init();
 263         pixmaps_init();
 264         dir_init();
 265         menu_init();
 266         dnd_init();
 267         filer_init();
 268         mount_init();
 269         options_init();
 270         type_init();
 271         action_init();
 272
 273         options_load();
 274
 275         /* Let child processes die */
 276         act.sa_handler = child_died;
 277         sigemptyset(&act.sa_mask);
 278         act.sa_flags = SA_NOCLDSTOP;
 279         sigaction(SIGCHLD, &act, NULL);
 280
 281         /* Ignore SIGPIPE - check for EPIPE errors instead */
 282         act.sa_handler = SIG_IGN;
 283         sigemptyset(&act.sa_mask);
 284         act.sa_flags = 0;
 285         sigaction(SIGPIPE, &act, NULL);
 286
 287         euid = geteuid();
 288         egid = getegid();
 289         ngroups = getgroups(0, NULL);
 290         if (ngroups < 0)
 291                 ngroups = 0;
 292         else if (ngroups > 0)
 293         {
 294                 supplemental_groups = g_malloc(sizeof(gid_t) * ngroups);
 295                 getgroups(ngroups, supplemental_groups);
 296         }
 297
 298         if (euid == 0)
 299         {
 300                 if (get_choice("!!!DANGER!!!",
 301                         "Running ROX-Filer as root is VERY dangerous. If I "
 302                         "had a warranty (I don't) then doing this would "
 303                         "void it", 2,
 304                         "Don't click here", "Quit") != 0)
 305                         exit(EXIT_SUCCESS);
 306         }
 307
 308         if (optind == argc && !panel_dirs)
 309                 filer_opendir(home_dir, PANEL_NO);
 310         else
 311         {
 312                 int      i = optind;
 313                 GList    *dir = panel_dirs;
 314                 GList    *side = panel_sides;
 315
 316                 while (dir)
 317                 {
 318                         int     c = (int) side->data;
 319
 320                         filer_opendir((char *) dir->data,
 321                                         c == 't' ? PANEL_TOP : PANEL_BOTTOM);
 322                         dir = dir->next;
 323                         side = side->next;
 324                 }
 325
 326                 g_list_free(dir);
 327                 g_list_free(side);
 328
 329                 while (i < argc)
 330                         filer_opendir(argv[i++], PANEL_NO);
 331         }
 332
 333         pipe(stderr_pipe);
 334         close_on_exec(stderr_pipe[0], TRUE);
 335         close_on_exec(stderr_pipe[1], TRUE);
 336         gdk_input_add(stderr_pipe[0], GDK_INPUT_READ, stderr_cb, NULL);
 337         to_error_log = stderr_pipe[1];
 338
 339         gtk_main();
 340
 341         return EXIT_SUCCESS;
 342 }
 343
 344 static void show_features(void)
 345 {
 346         g_printerr("\n-- %s --\n\n", _("features set at compile time"));
 347         g_printerr("%s... %s\n", _("VFS support"),
 348 #ifdef HAVE_LIBVFS
 349                 _("Yes")
 350 #else
 351                 _("No (couldn't find a valid libvfs)")
 352 #endif
 353                 );
 354         g_printerr("%s... %s\n", _("ImLib support"),
 355 #ifdef HAVE_IMLIB
 356                 _("Yes")
 357 #else
 358                 _("No (the imlib-config command didn't work)")
 359 #endif
 360                 );
 361         g_printerr("%s... %s\n", _("Internationalisation support"),
 362 #ifdef HAVE_GETTEXT
 363                 _("Yes")
 364 #else
 365                 _("No (could not find gettext() function)")
 366 #endif
 367                 );
 368 }
 369
 370 /* Register a function to be called when process number 'child' dies. */
 371 void on_child_death(int child, CallbackFn callback, gpointer data)
 372 {
 373         Callback        *cb;
 374
 375         g_return_if_fail(callback != NULL);
 376
 377         cb = g_new(Callback, 1);
 378
 379         cb->callback = callback;
 380         cb->data = data;
 381
 382         g_hash_table_insert(death_callbacks, (gpointer) child, cb);
 383 }