ROX-Filer/src/run.c

   1 /*
   2  * $Id$
   3  *
   4  * ROX-Filer, filer for the ROX desktop project
   5  * Copyright (C) 2005, the ROX-Filer team.
   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 /* run.c */
  23
  24 #include "config.h"
  25
  26 #include <errno.h>
  27 #include <string.h>
  28 #include <sys/param.h>
  29
  30 #include "global.h"
  31
  32 #include "run.h"
  33 #include "support.h"
  34 #include "gui_support.h"
  35 #include "filer.h"
  36 #include "display.h"
  37 #include "main.h"
  38 #include "type.h"
  39 #include "dir.h"
  40 #include "diritem.h"
  41 #include "action.h"
  42 #include "icon.h"
  43
  44 /* Static prototypes */
  45 static void write_data(gpointer data, gint fd, GdkInputCondition cond);
  46 static gboolean follow_symlink(const char *full_path,
  47                                FilerWindow *filer_window,
  48                                FilerWindow *src_window);
  49 static gboolean open_file(const guchar *path, MIME_type *type);
  50 static void open_mountpoint(const guchar *full_path, DirItem *item,
  51                             FilerWindow *filer_window, FilerWindow *src_window,
  52                             gboolean edit);
  53 static void run_desktop(const char *full_path, const char **args, const char *dir);
  54
  55 typedef struct _PipedData PipedData;
  56
  57 struct _PipedData
  58 {
  59         guchar          *data;
  60         gint            tag;
  61         gulong          sent;
  62         gulong          length;
  63 };
  64
  65
  66 /****************************************************************
  67  *                      EXTERNAL INTERFACE                      *
  68  ****************************************************************/
  69
  70
  71 /* An application has been double-clicked (or run in some other way) */
  72 void run_app(const char *path)
  73 {
  74         GString *apprun;
  75         const char *argv[] = {NULL, NULL};
  76
  77         apprun = g_string_new(path);
  78         argv[0] = g_string_append(apprun, "/AppRun")->str;
  79
  80         rox_spawn(home_dir, argv);
  81
  82         g_string_free(apprun, TRUE);
  83 }
  84
  85 /* Execute this program, passing all the URIs in the list as arguments.
  86  * URIs that are files on the local machine will be passed as simple
  87  * pathnames. The uri_list should be freed after this function returns.
  88  */
  89 void run_with_files(const char *path, GList *uri_list)
  90 {
  91         const char      **argv;
  92         int             argc = 0, i;
  93         struct stat     info;
  94         MIME_type       *type;
  95
  96         if (stat(path, &info))
  97         {
  98                 delayed_error(_("Program %s not found - deleted?"), path);
  99                 return;
 100         }
 101
 102         argv = g_malloc(sizeof(char *) * (g_list_length(uri_list) + 2));
 103
 104         if (S_ISDIR(info.st_mode))
 105                 argv[argc++] = make_path(path, "AppRun");
 106         else
 107                 argv[argc++] = path;
 108
 109         while (uri_list)
 110         {
 111                 const EscapedPath *uri = uri_list->data;
 112                 char *local;
 113
 114                 local = get_local_path(uri);
 115                 if (local)
 116                         argv[argc++] = local;
 117                 else
 118                         argv[argc++] = unescape_uri(uri);
 119                 uri_list = uri_list->next;
 120         }
 121
 122         argv[argc++] = NULL;
 123
 124         type = type_from_path(argv[0]);
 125         if (type && type == application_x_desktop)
 126         {
 127                 run_desktop(argv[0], argv + 1, home_dir);
 128         }
 129         else
 130         {
 131                 rox_spawn(home_dir, argv);
 132         }
 133
 134         for (i = 1; i < argc; i++)
 135                 g_free((gchar *) argv[i]);
 136         g_free(argv);
 137 }
 138
 139 /* Run the program as '<path> -', piping the data to it via stdin.
 140  * You can g_free() the data as soon as this returns.
 141  */
 142 void run_with_data(const char *path, gpointer data, gulong length)
 143 {
 144         const char      *argv[] = {NULL, "-", NULL};
 145         struct stat     info;
 146         int             fds[2];
 147         PipedData       *pd;
 148
 149         if (stat(path, &info))
 150         {
 151                 delayed_error(_("Program %s not found - deleted?"), path);
 152                 return;
 153         }
 154
 155         if (S_ISDIR(info.st_mode))
 156                 argv[0] = make_path(path, "AppRun");
 157         else
 158                 argv[0] = path;
 159
 160         if (pipe(fds))
 161         {
 162                 delayed_error("pipe: %s", g_strerror(errno));
 163                 return;
 164         }
 165         close_on_exec(fds[1], TRUE);
 166         close_on_exec(fds[0], TRUE);
 167
 168         switch (fork())
 169         {
 170                 case -1:
 171                         delayed_error("fork: %s", g_strerror(errno));
 172                         close(fds[1]);
 173                         break;
 174                 case 0:
 175                         /* We are the child */
 176                         chdir(home_dir);
 177                         if (dup2(fds[0], 0) == -1)
 178                                 g_warning("dup2() failed: %s\n",
 179                                                 g_strerror(errno));
 180                         else
 181                         {
 182                                 close_on_exec(0, FALSE);
 183                                 if (execv(argv[0], (char **) argv))
 184                                         g_warning("execv(%s) failed: %s\n",
 185                                                 argv[0], g_strerror(errno));
 186                         }
 187                         _exit(1);
 188                 default:
 189                         /* We are the parent */
 190                         set_blocking(fds[1], FALSE);
 191                         pd = g_new(PipedData, 1);
 192                         pd->data = g_malloc(length);
 193                         memcpy(pd->data, data, length);
 194                         pd->length = length;
 195                         pd->sent = 0;
 196                         pd->tag = gdk_input_add_full(fds[1], GDK_INPUT_WRITE,
 197                                                 write_data, pd, NULL);
 198                         break;
 199         }
 200
 201         close(fds[0]);
 202 }
 203
 204 /* Splits args into an argument vector, and runs the program. Must be
 205  * executable.
 206  */
 207 void run_with_args(const char *path, DirItem *item, const char *args)
 208 {
 209         GError *error = NULL;
 210         gchar **argv = NULL;
 211         int n_args = 0;
 212
 213         if (item->base_type != TYPE_DIRECTORY && item->base_type != TYPE_FILE)
 214         {
 215                 delayed_error("Arguments (%s) given for non-executable item %s",
 216                                 args, path);
 217                 return;
 218         }
 219
 220         if (!g_shell_parse_argv(args, &n_args, &argv, &error))
 221         {
 222                 delayed_error("Failed to parse argument string '%s':\n%s",
 223                                 args, error->message);
 224                 g_error_free(error);
 225                 return;
 226         }
 227
 228         g_return_if_fail(argv != NULL);
 229         g_return_if_fail(error == NULL);
 230
 231         argv = g_realloc(argv, (n_args + 2) * sizeof(gchar *));
 232         memmove(argv + 1, argv, (n_args + 1) * sizeof(gchar *));
 233
 234         if (item->base_type == TYPE_DIRECTORY)
 235                 argv[0] = g_strconcat(path, "/AppRun", NULL);
 236         else
 237                 argv[0] = g_strdup(path);
 238
 239         rox_spawn(home_dir, (const gchar **) argv);
 240
 241         g_strfreev(argv);
 242 }
 243
 244 /* Load a file, open a directory or run an application. Or, if 'edit' is set:
 245  * edit a file, open an application, follow a symlink or mount a device.
 246  *
 247  * filer_window is the window to use for displaying a directory.
 248  * NULL will always use a new directory when needed.
 249  * src_window is the window to copy options from, or NULL.
 250  *
 251  * Returns TRUE on success.
 252  */
 253 gboolean run_diritem(const guchar *full_path,
 254                      DirItem *item,
 255                      FilerWindow *filer_window,
 256                      FilerWindow *src_window,
 257                      gboolean edit)
 258 {
 259         if (item->flags & ITEM_FLAG_SYMLINK && edit)
 260                 return follow_symlink(full_path, filer_window, src_window);
 261
 262         switch (item->base_type)
 263         {
 264                 case TYPE_DIRECTORY:
 265                         if (item->flags & ITEM_FLAG_APPDIR && !edit)
 266                         {
 267                                 run_app(full_path);
 268                                 return TRUE;
 269                         }
 270
 271                         if (item->flags & ITEM_FLAG_MOUNT_POINT)
 272                         {
 273                                 open_mountpoint(full_path, item,
 274                                                 filer_window, src_window, edit);
 275                         }
 276                         else if (filer_window)
 277                                 filer_change_to(filer_window, full_path, NULL);
 278                         else
 279                                 filer_opendir(full_path, src_window, NULL);
 280                         return TRUE;
 281                 case TYPE_FILE:
 282                         if (EXECUTABLE_FILE(item) && !edit)
 283                         {
 284                                 const char *argv[] = {NULL, NULL};
 285                                 guchar  *dir = filer_window
 286                                                 ? filer_window->sym_path
 287                                                 : NULL;
 288
 289                                 if (item->mime_type == application_x_desktop)
 290                                         run_desktop(full_path, NULL, dir);
 291                                 else
 292                                         argv[0] = full_path;
 293
 294                                 return rox_spawn(dir, argv) != 0;
 295                         }
 296
 297                         return open_file(full_path, edit ? text_plain
 298                                                   : item->mime_type);
 299                 case TYPE_ERROR:
 300                         delayed_error(_("File doesn't exist, or I can't "
 301                                           "access it: %s"), full_path);
 302                         return FALSE;
 303                 default:
 304                         delayed_error(
 305                                 _("I don't know how to open '%s'"), full_path);
 306                         return FALSE;
 307         }
 308 }
 309
 310 /* Attempt to open this item */
 311 gboolean run_by_path(const guchar *full_path)
 312 {
 313         gboolean retval;
 314         DirItem *item;
 315
 316         /* XXX: Loads an image - wasteful */
 317         item = diritem_new("");
 318         diritem_restat(full_path, item, NULL);
 319         retval = run_diritem(full_path, item, NULL, NULL, FALSE);
 320         diritem_free(item);
 321
 322         return retval;
 323 }
 324
 325 /* Open dir/Help, or show a message if missing */
 326 void show_help_files(const char *dir)
 327 {
 328         const char      *help_dir;
 329
 330         help_dir = make_path(dir, "Help");
 331
 332         if (file_exists(help_dir))
 333                 filer_opendir(help_dir, NULL, NULL);
 334         else
 335                 info_message(
 336                         _("Application:\n"
 337                         "This is an application directory - you can "
 338                         "run it as a program, or open it (hold down "
 339                         "Shift while you open it). Most applications provide "
 340                         "their own help here, but this one doesn't."));
 341 }
 342
 343 /* Open a directory viewer showing this file, and wink it */
 344 void open_to_show(const guchar *path)
 345 {
 346         FilerWindow     *new;
 347         guchar          *dir, *slash;
 348
 349         g_return_if_fail(path != NULL);
 350
 351         dir = g_strdup(path);
 352         slash = strrchr(dir, '/');
 353         if (slash == dir || !slash)
 354         {
 355                 /* Item in the root (or root itself!) */
 356                 new = filer_opendir("/", NULL, NULL);
 357                 if (new && dir[1])
 358                         display_set_autoselect(new, dir + 1);
 359         }
 360         else
 361         {
 362                 *slash = '\0';
 363                 new = filer_opendir(dir, NULL, NULL);
 364                 if (new)
 365                 {
 366                         if (slash[1] == '.')
 367                                 display_set_hidden(new, TRUE);
 368                         display_set_autoselect(new, slash + 1);
 369                 }
 370         }
 371
 372         g_free(dir);
 373 }
 374
 375 /* Invoked using -x, this indicates that the filesystem has been modified
 376  * and we should look at this item again.
 377  */
 378 void examine(const guchar *path)
 379 {
 380         struct stat info;
 381
 382         if (mc_stat(path, &info) != 0)
 383         {
 384                 /* Deleted? Do a paranoid update of everything... */
 385                 filer_check_mounted(path);
 386         }
 387         else
 388         {
 389                 /* Update directory containing this item... */
 390                 dir_check_this(path);
 391
 392                 /* If this is itself a directory then rescan its contents... */
 393                 if (S_ISDIR(info.st_mode))
 394                         refresh_dirs(path);
 395
 396                 /* If it's on the pinboard, update the icon... */
 397                 icons_may_update(path);
 398         }
 399 }
 400
 401 /****************************************************************
 402  *                      INTERNAL FUNCTIONS                      *
 403  ****************************************************************/
 404
 405
 406 static void write_data(gpointer data, gint fd, GdkInputCondition cond)
 407 {
 408         PipedData *pd = (PipedData *) data;
 409
 410         while (pd->sent < pd->length)
 411         {
 412                 int     sent;
 413
 414                 sent = write(fd, pd->data + pd->sent, pd->length - pd->sent);
 415
 416                 if (sent < 0)
 417                 {
 418                         if (errno == EAGAIN)
 419                                 return;
 420                         delayed_error(_("Could not send data to program: %s"),
 421                                         g_strerror(errno));
 422                         goto finish;
 423                 }
 424
 425                 pd->sent += sent;
 426         }
 427
 428 finish:
 429         g_source_remove(pd->tag);
 430         g_free(pd->data);
 431         g_free(pd);
 432         close(fd);
 433 }
 434
 435 /* Follow the link 'full_path' and display it in filer_window, or a
 436  * new window if that is NULL.
 437  */
 438 static gboolean follow_symlink(const char *full_path,
 439                                FilerWindow *filer_window,
 440                                FilerWindow *src_window)
 441 {
 442         char    *real, *slash;
 443         char    *new_dir;
 444         char    path[MAXPATHLEN + 1];
 445         int     got;
 446
 447         got = readlink(full_path, path, MAXPATHLEN);
 448         if (got < 0)
 449         {
 450                 delayed_error(_("Could not read link: %s"),
 451                                   g_strerror(errno));
 452                 return FALSE;
 453         }
 454
 455         g_return_val_if_fail(got <= MAXPATHLEN, FALSE);
 456         path[got] = '\0';
 457
 458         /* Make a relative path absolute */
 459         if (path[0] != '/')
 460         {
 461                 guchar  *tmp;
 462                 slash = strrchr(full_path, '/');
 463                 g_return_val_if_fail(slash != NULL, FALSE);
 464
 465                 tmp = g_strndup(full_path, slash - full_path);
 466                 real = pathdup(make_path(tmp, path));
 467                 /* NB: full_path may be invalid here... */
 468                 g_free(tmp);
 469         }
 470         else
 471                 real = pathdup(path);
 472
 473         slash = strrchr(real, '/');
 474         if (!slash)
 475         {
 476                 g_free(real);
 477                 delayed_error(
 478                         _("Broken symlink (or you don't have permission "
 479                           "to follow it): %s"), full_path);
 480                 return FALSE;
 481         }
 482
 483         *slash = '\0';
 484
 485         if (*real)
 486                 new_dir = real;
 487         else
 488                 new_dir = "/";
 489
 490         if (filer_window)
 491                 filer_change_to(filer_window, new_dir, slash + 1);
 492         else
 493         {
 494                 FilerWindow *new;
 495
 496                 new = filer_opendir(new_dir, src_window, NULL);
 497                 if (new)
 498                         display_set_autoselect(new, slash + 1);
 499         }
 500
 501         g_free(real);
 502
 503         return TRUE;
 504 }
 505
 506 /* Load this file into an appropriate editor */
 507 static gboolean open_file(const guchar *path, MIME_type *type)
 508 {
 509         g_return_val_if_fail(type != NULL, FALSE);
 510
 511         if (type_open(path, type))
 512                 return TRUE;
 513
 514         report_error(
 515                 _("No run action specified for files of this type (%s/%s) - "
 516                 "you can set a run action by choosing `Set Run Action' "
 517                 "from the File menu, or you can just drag the file to an "
 518                 "application.%s"),
 519                 type->media_type,
 520                 type->subtype,
 521                 type->executable ? _("\n\nNote: If this is a computer program which "
 522                                    "you want to run, you need to set the execute bit "
 523                                    "by choosing Permissions from the File menu.")
 524                                 : "");
 525
 526         return FALSE;
 527 }
 528
 529 /* Called like run_diritem, when a mount-point is opened */
 530 static void open_mountpoint(const guchar *full_path, DirItem *item,
 531                             FilerWindow *filer_window, FilerWindow *src_window,
 532                             gboolean edit)
 533 {
 534         gboolean mounted = (item->flags & ITEM_FLAG_MOUNTED) != 0;
 535
 536         if (mounted == edit)
 537         {
 538                 GList   *paths;
 539
 540                 paths = g_list_prepend(NULL, (gpointer) full_path);
 541                 action_mount(paths, filer_window == NULL, !mounted, -1);
 542                 g_list_free(paths);
 543                 if (filer_window && !mounted)
 544                         filer_change_to(filer_window, full_path, NULL);
 545         }
 546         else
 547         {
 548                 if (filer_window)
 549                         filer_change_to(filer_window, full_path, NULL);
 550                 else
 551                         filer_opendir(full_path, src_window, NULL);
 552         }
 553 }
 554
 555 /* full_path is a .desktop file. Execute the application, using the Exec line from
 556  * the file.
 557  */
 558 static void run_desktop(const char *full_path, const char **args, const char *dir)
 559 {
 560         GError *error = NULL;
 561         char *exec = NULL;
 562         gint argc = 0;
 563         gchar **argv = NULL;
 564         GPtrArray *expanded = NULL;
 565         int i;
 566
 567         exec = get_value_from_desktop_file(full_path, "Desktop Entry", "Exec",
 568                                         &error);
 569         if (error)
 570         {
 571                 delayed_error("Failed to parse .desktop file '%s':\n%s",
 572                                 full_path, error->message);
 573                 goto err;
 574         }
 575
 576         if (!exec)
 577         {
 578                 delayed_error("Can't find Exec command in .desktop file '%s'",
 579                                 full_path);
 580                 goto err;
 581         }
 582
 583         if (!g_shell_parse_argv(exec, &argc, &argv, &error))
 584         {
 585                 delayed_error("Failed to parse '%s' from '%s':\n%s",
 586                                 exec, full_path, error->message);
 587                 goto err;
 588         }
 589
 590         expanded = g_ptr_array_new();
 591         for (i = 0; i < argc; i++)
 592         {
 593                 const char *src = argv[i];
 594
 595                 if (src[0] == '%' && src[1] != '\0' && src[2] == '\0')
 596                 {
 597                         /* We should treat these four differently. */
 598                         if (src[1] == 'f' || src[1] == 'F' ||
 599                             src[1] == 'u' || src[1] == 'U')
 600                         {
 601                                 int j;
 602                                 for (j = 0; args && args[j]; j++)
 603                                         g_ptr_array_add(expanded, g_strdup(args[j]));
 604                         }
 605                         else
 606                         {
 607                                 delayed_error("Unsupported escape character in '%s' in '%s'",
 608                                                 exec, full_path);
 609                                 goto err;
 610                         }
 611                 }
 612                 else
 613                 {
 614                         g_ptr_array_add(expanded, g_strdup(src));
 615                 }
 616         }
 617         g_ptr_array_add(expanded, NULL);
 618
 619         rox_spawn(dir, (const gchar **) expanded->pdata);
 620 err:
 621         if (error != NULL)
 622                 g_error_free(error);
 623         if (exec != NULL)
 624                 g_free(exec);
 625         if (argv != NULL)
 626                 g_strfreev(argv);
 627         if (expanded != NULL)
 628         {
 629                 g_ptr_array_foreach(expanded, (GFunc) g_free, NULL);
 630                 g_ptr_array_free(expanded, TRUE);
 631         }
 632 }