1 /* Required for strdup, snprintf, getopt */
2 #define _XOPEN_SOURCE 500
13 #include <sys/select.h>
14 #include <sys/inotify.h>
16 #include <gdk/gdkkeysyms.h>
18 typedef struct sProperty
24 typedef struct sDevice
34 typedef struct sGuiContext
42 char *post_mount_command;
45 GIOChannel *inotify_channel;
50 char **pmount_argv = NULL;
53 Parses a string of the form name=value and places the components in a Property
54 structure. Returns 0 on success, or -1 if the string wasn't a valid property.
56 int parse_property(char *str, int size, Property *prop)
61 for(i=0; (equals<0 && i<size); ++i)
68 prop->name = malloc(equals+1);
69 strncpy(prop->name, str, equals);
70 prop->name[equals] = 0;
72 prop->value = malloc(size-equals);
73 strncpy(prop->value, str+equals+1, size-equals-1);
74 prop->value[size-equals-1] = 0;
80 Retrieves all properties associated with a /dev node. The returned array is
81 terminated with an entry containing NULL values. Use free_properties to free
84 Property *get_device_properties(char *node)
92 Property *props = NULL;
102 printf("Running udevadm info -q property -n \"%s\"\n", node);
107 execl("/sbin/udevadm", "udevadm", "info", "-q", "property", "-n", node, NULL);
122 buf = (char *)malloc(bufsize);
134 len = read(pipe_fd[0], buf+pos, bufsize-pos);
143 for(i=0; (newline<0 && i<pos); ++i)
152 /* There was no newline in the buffer but there is more output to
153 be read. Try again with a larger buffer. */
155 buf = (char *)realloc(buf, bufsize);
159 if(parse_property(buf, newline, &prop)==0)
161 /* Reserve space for a sentinel value as well. */
162 props = (Property *)realloc(props, (n_props+2)*sizeof(Property));
163 props[n_props] = prop;
166 memmove(buf, buf+newline+1, pos-newline-1);
177 /* Terminate the array with NULL pointers. */
178 props[n_props].name = NULL;
179 props[n_props].value = NULL;
182 waitpid(pid, NULL, 0);
189 Looks for a property in an array of properties and returns its value. Returns
190 NULL if the property was not found.
192 char *get_property_value(Property *props, char *name)
195 for(i=0; props[i].name; ++i)
196 if(strcmp(props[i].name, name)==0)
197 return props[i].value;
202 Checks if a property has a specific value. A NULL value is matched if the
203 property does not exist.
205 int match_property_value(Property *props, char *name, char *value)
207 char *v = get_property_value(props, name);
210 return strcmp(v, value)==0;
214 Frees an array of properties and all strings contained in it.
216 void free_properties(Property *props)
221 for(i=0; props[i].name; ++i)
224 free(props[i].value);
230 Returns an array of user-mountable devices listed in fstab.
232 char **get_fstab_devices(void)
236 char **devices = NULL;
239 file = setmntent("/etc/fstab", "r");
243 while((me = getmntent(file)))
244 if(hasmntopt(me, "user")!=NULL)
246 devices = (char **)realloc(devices, (n_devices+2)*sizeof(char *));
247 devices[n_devices] = strdup(me->mnt_fsname);
253 devices[n_devices] = NULL;
259 Checks if an array of strings contains the specified string.
261 int is_in_array(char **array, char *str)
266 for(i=0; array[i]; ++i)
267 if(!strcmp(str, array[i]))
273 Frees an array of strings.
275 void free_string_array(char **array)
280 for(i=0; array[i]; ++i)
286 Checks if a partition identified by a sysfs path is on a removable device.
288 int is_removable(char *devpath)
295 len = snprintf(fnbuf, sizeof(fnbuf), "/sys%s", devpath);
296 /* Default to not removable if the path was too long. */
297 if(len+10>=(int)sizeof(fnbuf))
300 /* We got a partition as a parameter, but the removable property is on the
301 disk. Replace the last component with "removable". */
302 for(ptr=fnbuf+len; (ptr>fnbuf && *ptr!='/'); --ptr) ;
303 strcpy(ptr, "/removable");
305 fd = open(fnbuf, O_RDONLY);
314 printf(" Removable\n");
318 printf(" Not removable\n");
325 Checks if a partition's disk or any of its parent devices are connected to any
326 of a set of buses. The device is identified by a sysfs path. The bus array
327 must be terminated with a NULL entry.
329 int check_buses(char *devpath, char **buses)
335 len = snprintf(fnbuf, sizeof(fnbuf), "/sys%s", devpath);
336 /* Default to no match if the path was too long. */
337 if(len+10>=(int)sizeof(fnbuf))
340 for(ptr=fnbuf+len; ptr>fnbuf+12; --ptr)
344 /* Replace the last component with "subsystem". */
345 strcpy(ptr, "/subsystem");
346 len = readlink(fnbuf, linkbuf, sizeof(linkbuf)-1);
351 /* Extract the last component of the subsystem symlink. */
352 for(; (len>0 && linkbuf[len-1]!='/'); --len) ;
357 printf(" Subsystem of %s is %s\n", fnbuf, linkbuf+len);
360 if(is_in_array(buses, linkbuf+len))
369 Check if an array of properties describes a device that can be mounted. An
370 array of explicitly allowed devices can be passed in as well. Both arrays must
371 be terminated by a NULL entry.
373 int can_mount(Property *props, char **allowed)
375 static char *removable_buses[] = { "usb", "firewire", 0 };
380 devname = get_property_value(props, "DEVNAME");
381 if(is_in_array(allowed, devname))
384 /* Special case for CD devices, since they are not partitions. Only allow
385 mounting if media is inserted. */
386 if(match_property_value(props, "ID_TYPE", "cd") && match_property_value(props, "ID_CDROM_MEDIA", "1"))
389 /* Only allow mounting partitions. */
390 if(!match_property_value(props, "DEVTYPE", "partition"))
393 devpath = get_property_value(props, "DEVPATH");
394 if(is_removable(devpath))
397 /* Certain buses are removable by nature, but devices only advertise
398 themselves as removable if they support removable media, e.g. memory card
400 bus = get_property_value(props, "ID_BUS");
401 if(is_in_array(removable_buses, bus))
404 return check_buses(devpath, removable_buses);
408 Returns an array of all device nodes in a directory. Symbolic links are
411 char **get_device_nodes(char *dirname)
420 char **checked = NULL;
424 dir = opendir(dirname);
428 while((de = readdir(dir)))
433 /* Ignore . and .. entries. */
434 if(de->d_name[0]=='.' && (de->d_name[1]==0 || (de->d_name[1]=='.' && de->d_name[2]==0)))
437 snprintf(fnbuf, sizeof(fnbuf), "%s/%s", dirname, de->d_name);
441 if(S_ISLNK(st.st_mode))
444 len = readlink(fnbuf, linkbuf, sizeof(linkbuf)-1);
452 /* There may be multiple symlinks to the same device. Only include each
453 device once in the returned array. */
456 for(i=0; (!duplicate && i<n_checked); ++i)
457 if(strcmp(node, checked[i])==0)
463 printf("Device %s is a duplicate\n", fnbuf);
467 checked = (char **)realloc(checked, (n_checked+1)*sizeof(char *));
468 checked[n_checked] = strdup(node);
471 nodes = (char **)realloc(nodes, (n_nodes+2)*sizeof(char *));
472 nodes[n_nodes] = strdup(fnbuf);
479 for(i=0; i<n_checked; ++i)
485 nodes[n_nodes] = NULL;
491 Reads the list of mounted devices from /etc/mtab and records the mount points.
493 void check_mounts(Device *devices)
498 file = setmntent("/etc/mtab", "r");
502 while((me = getmntent(file)))
506 for(i=0; devices[i].node; ++i)
507 if(!strcmp(devices[i].devname, me->mnt_fsname))
509 devices[i].mount_point = strdup(me->mnt_dir);
512 printf("Device %s is mounted on %s\n", devices[i].node, devices[i].mount_point);
520 Returns an array of all mountable devices.
522 Device *get_devices(void)
525 Device *devices = NULL;
527 char **mounted = NULL;
531 nodes = get_device_nodes("/dev/disk/by-id");
532 fstab = get_fstab_devices();
534 for(i=0; nodes[i]; ++i)
539 printf("Examining device %s\n", nodes[i]);
541 props = get_device_properties(nodes[i]);
545 printf(" No properties\n");
552 for(j=0; props[j].name; ++j)
553 printf(" %s = %s\n", props[j].name, props[j].value);
556 if(can_mount(props, fstab))
567 printf(" Using device\n");
569 devname = get_property_value(props, "DEVNAME");
571 /* Get a human-readable label for the device. Use filesystem label,
572 filesystem UUID or device node name in order of preference. */
573 label = get_property_value(props, "ID_FS_LABEL");
575 label = get_property_value(props, "ID_FS_UUID");
581 for(ptr=label; *ptr; ++ptr)
586 vendor = get_property_value(props, "ID_VENDOR");
587 model = get_property_value(props, "ID_MODEL");
589 pos = snprintf(buf, sizeof(buf), "%s", label);
591 pos += snprintf(buf+pos, sizeof(buf)-pos, " (%s %s)", vendor, model);
595 /* Reserve space for a sentinel entry. */
596 devices = (Device *)realloc(devices, (n_devices+2)*sizeof(Device));
597 devices[n_devices].node = nodes[i];
598 devices[n_devices].devname = strdup(devname);
599 devices[n_devices].label = strdup(label);
600 devices[n_devices].description = strdup(buf);
601 devices[n_devices].mount_point = NULL;
602 devices[n_devices].time = st.st_mtime;
607 free_properties(props);
611 free_string_array(mounted);
615 /* Terminate the array with NULL pointers. */
616 devices[n_devices].node = NULL;
617 devices[n_devices].devname = NULL;
618 devices[n_devices].label = NULL;
619 devices[n_devices].description = NULL;
620 devices[n_devices].mount_point = NULL;
622 check_mounts(devices);
629 Frees an array of devices and all strings contained in it.
631 void free_devices(Device *devices)
636 for(i=0; devices[i].node; ++i)
638 free(devices[i].node);
639 free(devices[i].devname);
640 free(devices[i].label);
641 free(devices[i].description);
642 if(devices[i].mount_point)
643 free(devices[i].mount_point);
649 Mounts a device if it was not mounted, or unmounts if it was.
651 int toggle_device(Device *device, char *out_buf, int out_size)
653 int umount = !!device->mount_point;
654 char mount_point[1024];
658 struct timeval timeout;
665 /* Find a mount point that does not exist yet. */
670 len = snprintf(mount_point, sizeof(mount_point), "/media/%s", device->label);
671 if(len+2>=(int)sizeof(mount_point))
675 len += snprintf(mount_point+len, sizeof(mount_point)-len, "_%c", suffix);
677 if(access(mount_point, F_OK)<0 && errno==ENOENT)
695 /* Complete construction of pmount call */
698 pmount_argv[0] = "pmount";
701 while(pmount_argv[++last]);
703 pmount_argv[last] = device->node;
704 pmount_argv[last+1] = mount_point+7;
705 pmount_argv[last+2] = NULL;
710 printf("Running pumount %s\n", device->node);
714 printf("Running pmount");
715 while(pmount_argv[++i])
716 printf(" %s", pmount_argv[i]);
726 execl("/usr/bin/pumount", "pumount", device->node, NULL);
728 execvp("/usr/bin/pmount", pmount_argv);
738 FD_SET(pipe_fd[0], &fds);
740 timeout.tv_usec = 200000;
744 /* The write fd for the pipe may be inherited by a fuse server
745 process and stay open indefinitely. */
746 if(select(pipe_fd[0]+1, &fds, NULL, NULL, &timeout))
750 len = read(pipe_fd[0], out_buf+pos, out_size-pos-1);
755 else if(waitpid(pid, &status, 0))
764 waitpid(pid, &status, 0);
770 if(WIFEXITED(status))
772 if(WEXITSTATUS(status))
773 printf("Command exited successfully\n");
775 printf("Command exited with status %d\n", WEXITSTATUS(status));
777 else if(WIFSIGNALED(status))
778 printf("Command terminated with signal %d\n", WTERMSIG(status));
780 printf("Command exited with unknown result %04X\n", status);
783 if(!WIFEXITED(status) || WEXITSTATUS(status))
788 free(device->mount_point);
789 device->mount_point = NULL;
792 device->mount_point = strdup(mount_point);
798 Refreshes both the internal devices array and the GUI list.
800 int refresh_devices(GuiContext *context, int umount)
803 GtkTreeSelection *selection;
809 store = GTK_LIST_STORE(gtk_tree_view_get_model(GTK_TREE_VIEW(context->list)));
810 gtk_list_store_clear(store);
812 free_devices(context->devices);
814 context->devices = get_devices();
815 if(!context->devices)
818 selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(context->list));
820 /* Populate the list with devices in appropriate state. */
823 for(i=0; context->devices[i].node; ++i)
827 dev = &context->devices[i];
828 if(umount<0 || !dev->mount_point==!umount)
830 gtk_list_store_append(store, &iter);
831 gtk_list_store_set(store, &iter,
834 2, !!dev->mount_point,
839 /* Pre-select the device that appeared on the system most recently. */
841 gtk_tree_selection_select_iter(selection, &iter);
852 Handles an automatic refresh of the device list in response to inotify events.
854 gboolean refresh_devices_idle(gpointer data)
856 GuiContext *context = (GuiContext *)data;
859 n_listed = refresh_devices(context, -1);
860 context->refresh_pending = 0;
862 if(context->autohide)
865 gtk_widget_show_all(context->window);
867 gtk_widget_hide(context->window);
874 Callback for selection in the device list changing. Updates the action button
875 label according to device status.
877 void selection_changed(GtkTreeSelection *selection, gpointer user_data)
879 GuiContext *context = (GuiContext *)user_data;
884 if(!gtk_tree_selection_get_selected(selection, &model, &iter))
887 gtk_tree_model_get(model, &iter, 1, &device, -1);
888 gtk_button_set_label(GTK_BUTTON(context->button), (device->mount_point ? "Unmount" : "Mount"));
892 Callback for activating a row in the device list. Mounts or unmounts the
893 device depending on operating mode.
895 void row_activated(GtkTreeView *list, GtkTreePath *path, GtkTreeViewColumn *column, gpointer user_data)
897 GuiContext *context = (GuiContext *)user_data;
905 model = gtk_tree_view_get_model(list);
907 if(!gtk_tree_model_get_iter(model, &iter, path))
910 gtk_tree_model_get(model, &iter, 1, &device, -1);
911 ret = toggle_device(device, output, sizeof(output));
916 /* Pmount terminated with nonzero status or a signal. Display an
917 error to the user. */
918 dialog = gtk_message_dialog_new(NULL, 0, GTK_MESSAGE_ERROR, GTK_BUTTONS_OK, "%s", output);
920 g_signal_connect(dialog, "response", G_CALLBACK(>k_widget_destroy), dialog);
922 g_signal_connect(dialog, "response", G_CALLBACK(>k_main_quit), NULL);
923 gtk_widget_show_all(dialog);
929 gtk_list_store_set(GTK_LIST_STORE(model), &iter,
930 2, !!device->mount_point,
931 3, device->mount_point,
934 gtk_button_set_label(GTK_BUTTON(context->button), (device->mount_point ? "Unmount" : "Mount"));
939 if(context->post_mount_command && device->mount_point)
942 printf("Running %s in %s\n", context->post_mount_command, device->mount_point);
947 chdir(device->mount_point);
948 execlp(context->post_mount_command, context->post_mount_command, NULL);
958 Callback for the mount/unmount button. Causes the selected row in the device
959 list to be activated.
961 void button_clicked(GtkButton *button, gpointer user_data)
963 GuiContext *context = (GuiContext *)user_data;
964 GtkTreeSelection *selection;
968 GtkTreeViewColumn *column;
970 selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(context->list));
971 gtk_tree_selection_get_selected(selection, &model, &iter);
972 path = gtk_tree_model_get_path(model, &iter);
973 column = gtk_tree_view_get_column(GTK_TREE_VIEW(context->list), 0);
974 gtk_tree_view_row_activated(GTK_TREE_VIEW(context->list), path, column);
975 gtk_tree_path_free(path);
981 Global key press callback for the window.
983 gboolean key_press(GtkWidget *widget, GdkEvent *event, gpointer user_data)
985 if(event->key.keyval==GDK_KEY_Escape)
998 Callback for inotify events.
1000 gboolean inotify_event_available(GIOChannel *source, GIOCondition condition, gpointer user_data)
1002 GuiContext *context = (GuiContext *)user_data;
1004 char eventbuf[sizeof(struct inotify_event)+NAME_MAX+1];
1007 fd = g_io_channel_unix_get_fd(source);
1008 len = read(fd, eventbuf, sizeof(eventbuf));
1009 if(len>=(int)sizeof(struct inotify_event))
1011 if(!context->refresh_pending)
1013 g_timeout_add(500, &refresh_devices_idle, context);
1014 context->refresh_pending = 1;
1023 void show_help(void)
1025 printf("pmount-gui\n"
1026 "Copyright (c) 2011-2016 Mikko Rasa, Mikkosoft Productions\n\n"
1027 "Usage: pmount-gui [-v] [-u] [-r <command>] [-m|-M] [-h] [-- <pmount options>]\n\n"
1029 " -v Increase verbosity\n"
1030 " -u Unmount a device (default is mount)\n"
1031 " -r Run a command after mounting\n"
1032 " -m Start a persistent mount manager\n"
1033 " -M Like -m, but hide the window if there are no devices\n"
1034 " -h Display this help\n");
1037 int main(int argc, char **argv)
1041 GtkWidget *viewport;
1042 GtkListStore *store;
1043 GtkTreeSelection *selection;
1044 GtkCellRenderer *mounted_toggle;
1049 context.manager = 0;
1050 context.autohide = 0;
1051 context.devices = NULL;
1052 context.post_mount_command = NULL;
1053 context.inotify_fd = -1;
1054 context.dev_wd = -1;
1055 context.inotify_channel = NULL;
1056 context.refresh_pending = 0;
1058 gtk_init(&argc, &argv);
1060 while((opt = getopt(argc, argv, "vur:mMh"))!=-1) switch(opt)
1069 context.post_mount_command = optarg;
1072 context.manager = 1;
1073 context.autohide = 0;
1076 context.manager = 1;
1077 context.autohide = 1;
1084 /* argc - optind equals to number of options after "--" */
1085 /* One empty element at the beginning is for program name for execvp */
1086 /* Three empty elements at the end are required options for pmount + NULL */
1088 pmount_argv = malloc(sizeof(char *)*(argc-optind+4));
1090 for(i=0; i<(argc-optind); ++i)
1091 pmount_argv[i+1] = argv[optind+i];
1092 pmount_argv[argc-optind+1] = NULL;
1094 context.window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
1095 gtk_container_set_border_width(GTK_CONTAINER(context.window), 5);
1096 g_signal_connect(context.window, "destroy", G_CALLBACK(>k_main_quit), NULL);
1098 box = gtk_vbox_new(FALSE, 5);
1099 gtk_container_add(GTK_CONTAINER(context.window), box);
1101 viewport = gtk_viewport_new(NULL, NULL);
1102 gtk_viewport_set_shadow_type(GTK_VIEWPORT(viewport), GTK_SHADOW_IN);
1103 gtk_box_pack_start(GTK_BOX(box), viewport, TRUE, TRUE, 0);
1105 context.list = gtk_tree_view_new();
1106 gtk_container_add(GTK_CONTAINER(viewport), context.list);
1107 g_signal_connect(context.list, "row-activated", G_CALLBACK(&row_activated), &context);
1109 store = gtk_list_store_new(4, G_TYPE_STRING, G_TYPE_POINTER, G_TYPE_BOOLEAN, G_TYPE_STRING);
1110 gtk_tree_view_set_model(GTK_TREE_VIEW(context.list), GTK_TREE_MODEL(store));
1111 gtk_tree_view_insert_column_with_attributes(GTK_TREE_VIEW(context.list),
1112 -1, "Device", gtk_cell_renderer_text_new(), "text", 0, NULL);
1116 GtkTreeViewColumn *mounted_column;
1117 GtkCellRenderer *mount_point_renderer;
1119 mounted_column = gtk_tree_view_column_new();
1120 gtk_tree_view_column_set_title(mounted_column, "Mounted");
1122 mounted_toggle = gtk_cell_renderer_toggle_new();
1123 gtk_tree_view_column_pack_start(mounted_column, mounted_toggle, FALSE);
1124 gtk_tree_view_column_add_attribute(mounted_column, mounted_toggle, "active", 2);
1126 mount_point_renderer = gtk_cell_renderer_text_new();
1127 gtk_tree_view_column_pack_start(mounted_column, mount_point_renderer, TRUE);
1128 gtk_tree_view_column_add_attribute(mounted_column, mount_point_renderer, "text", 3);
1130 gtk_tree_view_insert_column(GTK_TREE_VIEW(context.list), mounted_column, -1);
1132 context.inotify_fd = inotify_init();
1133 if(context.inotify_fd>=0)
1135 context.dev_wd = inotify_add_watch(context.inotify_fd, "/dev/disk/by-id", IN_CREATE|IN_DELETE);
1137 context.inotify_channel = g_io_channel_unix_new(context.inotify_fd);
1138 g_io_add_watch(context.inotify_channel, G_IO_IN, &inotify_event_available, &context);
1141 printf("Warning: Unable to initialize inotify\n");
1146 g_signal_connect(context.window, "key-press-event", G_CALLBACK(&key_press), NULL);
1148 selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(context.list));
1149 g_signal_connect(selection, "changed", G_CALLBACK(&selection_changed), &context);
1151 context.button = gtk_button_new_with_label(umount ? "Unmount" : "Mount");
1152 g_signal_connect(context.button, "clicked", G_CALLBACK(&button_clicked), &context);
1153 gtk_box_pack_start(GTK_BOX(box), context.button, FALSE, TRUE, 0);
1155 n_listed = refresh_devices(&context, umount);
1157 if(n_listed || (context.manager && !context.autohide))
1158 gtk_widget_show_all(context.window);
1159 else if(!context.manager)
1163 /* Don't show the main window if no devices were listed. */
1164 dialog = gtk_message_dialog_new(NULL, 0, GTK_MESSAGE_WARNING, GTK_BUTTONS_OK,
1165 "No devices to %s", (umount ? "unmount" : "mount"));
1166 g_signal_connect(dialog, "response", G_CALLBACK(>k_main_quit), NULL);
1167 gtk_widget_show_all(dialog);
1172 free_devices(context.devices);
1173 if(context.inotify_fd>=0)
1174 close(context.inotify_fd);