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 #include "i18n.h"
  55 #include "remote.h"
  56
  57 int number_of_windows = 0;      /* Quit when this reaches 0 again... */
  58 int to_error_log = -1;          /* Write here to log errors */
  59
  60 uid_t euid;
  61 gid_t egid;
  62 int ngroups;                    /* Number of supplemental groups */
  63 gid_t *supplemental_groups = NULL;
  64 char *home_dir;
  65
  66 /* Static prototypes */
  67 static void show_features(void);
  68
  69
  70 #define COPYING                                                         \
  71              N_("Copyright (C) 2000 Thomas Leonard.\n"                  \
  72                 "ROX-Filer comes with ABSOLUTELY NO WARRANTY,\n"        \
  73                 "to the extent permitted by law.\n"                     \
  74                 "You may redistribute copies of ROX-Filer\n"            \
  75                 "under the terms of the GNU General Public License.\n"  \
  76                 "For more information about these matters, "            \
  77                 "see the file named COPYING.\n")
  78
  79 #ifdef HAVE_GETOPT_LONG
  80 #  define USAGE   N_("Try `ROX-Filer/AppRun --help' for more information.\n")
  81 #  define SHORT_ONLY_WARNING ""
  82 #else
  83 #  define USAGE   N_("Try `ROX-Filer/AppRun -h' for more information.\n")
  84 #  define SHORT_ONLY_WARNING    \
  85                 _("NOTE: Your system does not support long options - \n" \
  86                 "you must use the short versions instead.\n\n")
  87 #endif
  88
  89 #define SHORT_OPS "t:b:ohvn"
  90
  91 #define HELP N_("Usage: ROX-Filer/AppRun [OPTION]... [DIR]...\n"        \
  92        "Open filer windows showing each directory listed, or $HOME \n"  \
  93        "if no directories are given.\n\n"                               \
  94        "  -b, --bottom=DIR      open DIR as a bottom-edge panel\n"      \
  95        "  -h, --help            display this help and exit\n"                 \
  96        "  -n, --new             start a new filer, even if already running\n"  \
  97        "  -o, --override        override window manager control of panels\n" \
  98        "  -t, --top=DIR         open DIR as a top-edge panel\n"         \
  99        "  -v, --version         display the version information and exit\n"   \
 100        "\nReport bugs to <tal197@ecs.soton.ac.uk>.\n")
 101
 102 #ifdef HAVE_GETOPT_LONG
 103 static struct option long_opts[] =
 104 {
 105         {"top", 1, NULL, 't'},
 106         {"bottom", 1, NULL, 'b'},
 107         {"override", 0, NULL, 'o'},
 108         {"help", 0, NULL, 'h'},
 109         {"version", 0, NULL, 'v'},
 110         {"new", 0, NULL, 'n'},
 111         {NULL, 0, NULL, 0},
 112 };
 113 #endif
 114
 115 /* Take control of panels away from WM? */
 116 gboolean override_redirect = FALSE;
 117
 118 /* Always start a new filer, even if one seems to be already running */
 119 gboolean new_copy = FALSE;
 120
 121 /* Maps child PIDs to Callback pointers */
 122 static GHashTable *death_callbacks = NULL;
 123 static gboolean child_died_flag = FALSE;
 124
 125 /* This is called as a signal handler; simply ensures that
 126  * child_died_callback() will get called later.
 127  */
 128 static void child_died(int signum)
 129 {
 130         child_died_flag = TRUE;
 131         write(to_error_log, '\0', 1);   /* Wake up! */
 132 }
 133
 134 static void child_died_callback(void)
 135 {
 136         int             status;
 137         int             child;
 138
 139         child_died_flag = FALSE;
 140
 141         /* Find out which children exited and allow them to die */
 142         do
 143         {
 144                 Callback        *cb;
 145
 146                 child = waitpid(-1, &status, WNOHANG);
 147
 148                 if (child == 0 || child == -1)
 149                         return;
 150
 151                 cb = g_hash_table_lookup(death_callbacks, (gpointer) child);
 152                 if (cb)
 153                 {
 154                         cb->callback(cb->data);
 155                         g_hash_table_remove(death_callbacks, (gpointer) child);
 156                 }
 157
 158         } while (1);
 159 }
 160
 161 #define BUFLEN 40
 162 void stderr_cb(gpointer data, gint source, GdkInputCondition condition)
 163 {
 164         char buf[BUFLEN];
 165         static GtkWidget *log = NULL;
 166         static GtkWidget *window = NULL;
 167         ssize_t len;
 168
 169         if (!window)
 170         {
 171                 GtkWidget       *hbox, *scrollbar;
 172
 173                 window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 174                 gtk_window_set_title(GTK_WINDOW(window),
 175                                                 _("ROX-Filer message log"));
 176                 gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
 177                 gtk_window_set_default_size(GTK_WINDOW(window), 600, 300);
 178                 gtk_signal_connect_object(GTK_OBJECT(window), "delete_event",
 179                                 gtk_widget_hide, GTK_OBJECT(window));
 180
 181
 182                 hbox = gtk_hbox_new(FALSE, 0);
 183                 gtk_container_add(GTK_CONTAINER(window), hbox);
 184                 scrollbar = gtk_vscrollbar_new(NULL);
 185
 186                 log = gtk_text_new(NULL,
 187                                 gtk_range_get_adjustment(GTK_RANGE(scrollbar)));
 188                 gtk_box_pack_start(GTK_BOX(hbox), log, TRUE, TRUE, 0);
 189                 gtk_box_pack_start(GTK_BOX(hbox), scrollbar, FALSE, TRUE, 0);
 190         }
 191
 192         len = read(source, buf, BUFLEN);
 193
 194         if (child_died_flag)
 195         {
 196                 child_died_callback();
 197                 if (len == 1 && !*buf)
 198                         return;
 199         }
 200
 201         if (len > 0)
 202         {
 203                 if (!GTK_WIDGET_MAPPED(window))
 204                         gtk_widget_show_all(window);
 205                 gtk_text_insert(GTK_TEXT(log), NULL, NULL, NULL, buf, len);
 206         }
 207 }
 208
 209 int main(int argc, char **argv)
 210 {
 211         int              stderr_pipe[2];
 212         struct sigaction act;
 213         GList           *panel_dirs = NULL;
 214         GList           *panel_sides = NULL;
 215
 216         choices_init();
 217         i18n_init();
 218
 219         home_dir = g_get_home_dir();
 220         death_callbacks = g_hash_table_new(NULL, NULL);
 221
 222 #ifdef HAVE_LIBVFS
 223         mc_vfs_init();
 224 #endif
 225         gtk_init(&argc, &argv);
 226
 227         while (1)
 228         {
 229                 int     c;
 230 #ifdef HAVE_GETOPT_LONG
 231                 int     long_index;
 232                 c = getopt_long(argc, argv, SHORT_OPS,
 233                                 long_opts, &long_index);
 234 #else
 235                 c = getopt(argc, argv, SHORT_OPS);
 236 #endif
 237
 238                 if (c == EOF)
 239                         break;          /* No more options */
 240
 241                 switch (c)
 242                 {
 243                         case 'n':
 244                                 new_copy = TRUE;
 245                                 break;
 246                         case 'o':
 247                                 override_redirect = TRUE;
 248                                 break;
 249                         case 'v':
 250                                 fprintf(stderr, "ROX-Filer %s\n", VERSION);
 251                                 fprintf(stderr, _(COPYING));
 252                                 show_features();
 253                                 return EXIT_SUCCESS;
 254                         case 'h':
 255                                 fprintf(stderr, _(HELP));
 256                                 fprintf(stderr, _(SHORT_ONLY_WARNING));
 257                                 return EXIT_SUCCESS;
 258                         case 't':
 259                         case 'b':
 260                                 panel_sides = g_list_prepend(panel_sides,
 261                                                         (gpointer) c);
 262                                 panel_dirs = g_list_prepend(panel_dirs,
 263                                                 *optarg == '=' ? optarg + 1
 264                                                         : optarg);
 265                                 break;
 266                         default:
 267                                 printf(_(USAGE));
 268                                 return EXIT_FAILURE;
 269                 }
 270         }
 271
 272         gui_support_init();
 273         if (remote_init(argc - optind, argv + optind, new_copy))
 274                 return EXIT_SUCCESS;    /* Already running */
 275         pixmaps_init();
 276         dir_init();
 277         menu_init();
 278         dnd_init();
 279         filer_init();
 280         mount_init();
 281         options_init();
 282         type_init();
 283         action_init();
 284
 285         options_load();
 286
 287         /* Let child processes die */
 288         act.sa_handler = child_died;
 289         sigemptyset(&act.sa_mask);
 290         act.sa_flags = SA_NOCLDSTOP;
 291         sigaction(SIGCHLD, &act, NULL);
 292
 293         /* Ignore SIGPIPE - check for EPIPE errors instead */
 294         act.sa_handler = SIG_IGN;
 295         sigemptyset(&act.sa_mask);
 296         act.sa_flags = 0;
 297         sigaction(SIGPIPE, &act, NULL);
 298
 299         euid = geteuid();
 300         egid = getegid();
 301         ngroups = getgroups(0, NULL);
 302         if (ngroups < 0)
 303                 ngroups = 0;
 304         else if (ngroups > 0)
 305         {
 306                 supplemental_groups = g_malloc(sizeof(gid_t) * ngroups);
 307                 getgroups(ngroups, supplemental_groups);
 308         }
 309
 310         if (euid == 0)
 311         {
 312                 if (get_choice(_("!!!DANGER!!!"),
 313                         _("Running ROX-Filer as root is VERY dangerous. If I "
 314                         "had a warranty (I don't) then doing this would "
 315                         "void it"), 2,
 316                         _("Don't click here"), _("Quit")) != 0)
 317                         exit(EXIT_SUCCESS);
 318         }
 319
 320         if (optind == argc && !panel_dirs)
 321                 filer_opendir(home_dir, PANEL_NO);
 322         else
 323         {
 324                 int      i = optind;
 325                 GList    *dir = panel_dirs;
 326                 GList    *side = panel_sides;
 327
 328                 while (dir)
 329                 {
 330                         int     c = (int) side->data;
 331
 332                         filer_opendir((char *) dir->data,
 333                                         c == 't' ? PANEL_TOP : PANEL_BOTTOM);
 334                         dir = dir->next;
 335                         side = side->next;
 336                 }
 337
 338                 g_list_free(dir);
 339                 g_list_free(side);
 340
 341                 while (i < argc)
 342                         filer_opendir(argv[i++], PANEL_NO);
 343         }
 344
 345         pipe(stderr_pipe);
 346         close_on_exec(stderr_pipe[0], TRUE);
 347         close_on_exec(stderr_pipe[1], TRUE);
 348         gdk_input_add(stderr_pipe[0], GDK_INPUT_READ, stderr_cb, NULL);
 349         to_error_log = stderr_pipe[1];
 350
 351         gtk_main();
 352
 353         return EXIT_SUCCESS;
 354 }
 355
 356 static void show_features(void)
 357 {
 358         g_printerr("\n-- %s --\n\n", _("features set at compile time"));
 359         g_printerr("%s... %s\n", _("VFS support"),
 360 #ifdef HAVE_LIBVFS
 361                 _("Yes")
 362 #else
 363                 _("No (couldn't find a valid libvfs)")
 364 #endif
 365                 );
 366         g_printerr("%s... %s\n", _("ImLib support"),
 367 #ifdef HAVE_IMLIB
 368                 _("Yes")
 369 #else
 370                 _("No (the imlib-config command didn't work)")
 371 #endif
 372                 );
 373 }
 374
 375 /* Register a function to be called when process number 'child' dies. */
 376 void on_child_death(int child, CallbackFn callback, gpointer data)
 377 {
 378         Callback        *cb;
 379
 380         g_return_if_fail(callback != NULL);
 381
 382         cb = g_new(Callback, 1);
 383
 384         cb->callback = callback;
 385         cb->data = data;
 386
 387         g_hash_table_insert(death_callbacks, (gpointer) child, cb);
 388 }