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
40 char *post_mount_command;
43 GIOChannel *inotify_channel;
50 Parses a string of the form name=value and places the components in a Property
51 structure. Returns 0 on success, or -1 if the string wasn't a valid property.
53 int parse_property(char *str, int size, Property *prop)
58 for(i=0; (equals<0 && i<size); ++i)
65 prop->name = malloc(equals+1);
66 strncpy(prop->name, str, equals);
67 prop->name[equals] = 0;
69 prop->value = malloc(size-equals);
70 strncpy(prop->value, str+equals+1, size-equals-1);
71 prop->value[size-equals-1] = 0;
77 Retrieves all properties associated with a /dev node. The returned array is
78 terminated with an entry containing NULL values. Use free_properties to free
81 Property *get_device_properties(char *node)
89 Property *props = NULL;
99 printf("Running udevadm info -q property -n \"%s\"\n", node);
104 execl("/sbin/udevadm", "udevadm", "info", "-q", "property", "-n", node, NULL);
119 buf = (char *)malloc(bufsize);
131 len = read(pipe_fd[0], buf+pos, bufsize-pos);
140 for(i=0; (newline<0 && i<pos); ++i)
149 /* There was no newline in the buffer but there is more output to
150 be read. Try again with a larger buffer. */
152 buf = (char *)realloc(buf, bufsize);
156 if(parse_property(buf, newline, &prop)==0)
158 /* Reserve space for a sentinel value as well. */
159 props = (Property *)realloc(props, (n_props+2)*sizeof(Property));
160 props[n_props] = prop;
163 memmove(buf, buf+newline+1, pos-newline-1);
174 /* Terminate the array with NULL pointers. */
175 props[n_props].name = NULL;
176 props[n_props].value = NULL;
179 waitpid(pid, NULL, 0);
186 Looks for a property in an array of properties and returns its value. Returns
187 NULL if the property was not found.
189 char *get_property_value(Property *props, char *name)
192 for(i=0; props[i].name; ++i)
193 if(strcmp(props[i].name, name)==0)
194 return props[i].value;
199 Checks if a property has a specific value. A NULL value is matched if the
200 property does not exist.
202 int match_property_value(Property *props, char *name, char *value)
204 char *v = get_property_value(props, name);
207 return strcmp(v, value)==0;
211 Frees an array of properties and all strings contained in it.
213 void free_properties(Property *props)
218 for(i=0; props[i].name; ++i)
221 free(props[i].value);
227 Returns an array of user-mountable devices listed in fstab.
229 char **get_fstab_devices(void)
233 char **devices = NULL;
236 file = setmntent("/etc/fstab", "r");
240 while((me = getmntent(file)))
241 if(hasmntopt(me, "user")!=NULL)
243 devices = (char **)realloc(devices, (n_devices+2)*sizeof(char *));
244 devices[n_devices] = strdup(me->mnt_fsname);
250 devices[n_devices] = NULL;
256 Checks if an array of strings contains the specified string.
258 int is_in_array(char **array, char *str)
263 for(i=0; array[i]; ++i)
264 if(!strcmp(str, array[i]))
270 Frees an array of strings.
272 void free_string_array(char **array)
277 for(i=0; array[i]; ++i)
283 Checks if a partition identified by a sysfs path is on a removable device.
285 int is_removable(char *devpath)
292 len = snprintf(fnbuf, sizeof(fnbuf), "/sys%s", devpath);
293 /* Default to not removable if the path was too long. */
294 if(len+10>=(int)sizeof(fnbuf))
297 /* We got a partition as a parameter, but the removable property is on the
298 disk. Replace the last component with "removable". */
299 for(ptr=fnbuf+len; (ptr>fnbuf && *ptr!='/'); --ptr) ;
300 strcpy(ptr, "/removable");
302 fd = open(fnbuf, O_RDONLY);
311 printf(" Removable\n");
315 printf(" Not removable\n");
322 Checks if a partition's disk or any of its parent devices are connected to any
323 of a set of buses. The device is identified by a sysfs path. The bus array
324 must be terminated with a NULL entry.
326 int check_buses(char *devpath, char **buses)
332 len = snprintf(fnbuf, sizeof(fnbuf), "/sys%s", devpath);
333 /* Default to no match if the path was too long. */
334 if(len+10>=(int)sizeof(fnbuf))
337 for(ptr=fnbuf+len; ptr>fnbuf+12; --ptr)
341 /* Replace the last component with "subsystem". */
342 strcpy(ptr, "/subsystem");
343 len = readlink(fnbuf, linkbuf, sizeof(linkbuf)-1);
348 /* Extract the last component of the subsystem symlink. */
349 for(; (len>0 && linkbuf[len-1]!='/'); --len) ;
354 printf(" Subsystem of %s is %s\n", fnbuf, linkbuf+len);
357 if(is_in_array(buses, linkbuf+len))
366 Check if an array of properties describes a device that can be mounted. An
367 array of explicitly allowed devices can be passed in as well. Both arrays must
368 be terminated by a NULL entry.
370 int can_mount(Property *props, char **allowed)
372 static char *removable_buses[] = { "usb", "firewire", 0 };
377 devname = get_property_value(props, "DEVNAME");
378 if(is_in_array(allowed, devname))
381 /* Special case for CD devices, since they are not partitions. Only allow
382 mounting if media is inserted. */
383 if(match_property_value(props, "ID_TYPE", "cd") && match_property_value(props, "ID_CDROM_MEDIA", "1"))
386 /* Only allow mounting partitions. */
387 if(!match_property_value(props, "DEVTYPE", "partition"))
390 devpath = get_property_value(props, "DEVPATH");
391 if(is_removable(devpath))
394 /* Certain buses are removable by nature, but devices only advertise
395 themselves as removable if they support removable media, e.g. memory card
397 bus = get_property_value(props, "ID_BUS");
398 if(is_in_array(removable_buses, bus))
401 return check_buses(devpath, removable_buses);
405 Returns an array of all device nodes in a directory. Symbolic links are
408 char **get_device_nodes(char *dirname)
417 char **checked = NULL;
421 dir = opendir(dirname);
425 while((de = readdir(dir)))
430 /* Ignore . and .. entries. */
431 if(de->d_name[0]=='.' && (de->d_name[1]==0 || (de->d_name[1]=='.' && de->d_name[2]==0)))
434 snprintf(fnbuf, sizeof(fnbuf), "%s/%s", dirname, de->d_name);
438 if(S_ISLNK(st.st_mode))
441 len = readlink(fnbuf, linkbuf, sizeof(linkbuf)-1);
449 /* There may be multiple symlinks to the same device. Only include each
450 device once in the returned array. */
453 for(i=0; (!duplicate && i<n_checked); ++i)
454 if(strcmp(node, checked[i])==0)
460 printf("Device %s is a duplicate\n", fnbuf);
464 checked = (char **)realloc(checked, (n_checked+1)*sizeof(char *));
465 checked[n_checked] = strdup(node);
468 nodes = (char **)realloc(nodes, (n_nodes+2)*sizeof(char *));
469 nodes[n_nodes] = strdup(fnbuf);
476 for(i=0; i<n_checked; ++i)
482 nodes[n_nodes] = NULL;
488 Reads the list of mounted devices from /etc/mtab and records the mount points.
490 void check_mounts(Device *devices)
495 file = setmntent("/etc/mtab", "r");
499 while((me = getmntent(file)))
503 for(i=0; devices[i].node; ++i)
504 if(!strcmp(devices[i].devname, me->mnt_fsname))
506 devices[i].mount_point = strdup(me->mnt_dir);
509 printf("Device %s is mounted on %s\n", devices[i].node, devices[i].mount_point);
517 Returns an array of all mountable devices.
519 Device *get_devices(void)
522 Device *devices = NULL;
524 char **mounted = NULL;
528 nodes = get_device_nodes("/dev/disk/by-id");
529 fstab = get_fstab_devices();
531 for(i=0; nodes[i]; ++i)
536 printf("Examining device %s\n", nodes[i]);
538 props = get_device_properties(nodes[i]);
542 printf(" No properties\n");
549 for(j=0; props[j].name; ++j)
550 printf(" %s = %s\n", props[j].name, props[j].value);
553 if(can_mount(props, fstab))
564 printf(" Using device\n");
566 devname = get_property_value(props, "DEVNAME");
568 /* Get a human-readable label for the device. Use filesystem label,
569 filesystem UUID or device node name in order of preference. */
570 label = get_property_value(props, "ID_FS_LABEL");
572 label = get_property_value(props, "ID_FS_UUID");
578 for(ptr=label; *ptr; ++ptr)
583 vendor = get_property_value(props, "ID_VENDOR");
584 model = get_property_value(props, "ID_MODEL");
586 pos = snprintf(buf, sizeof(buf), "%s", label);
588 pos += snprintf(buf+pos, sizeof(buf)-pos, " (%s %s)", vendor, model);
592 /* Reserve space for a sentinel entry. */
593 devices = (Device *)realloc(devices, (n_devices+2)*sizeof(Device));
594 devices[n_devices].node = nodes[i];
595 devices[n_devices].devname = strdup(devname);
596 devices[n_devices].label = strdup(label);
597 devices[n_devices].description = strdup(buf);
598 devices[n_devices].mount_point = NULL;
599 devices[n_devices].time = st.st_mtime;
604 free_properties(props);
608 free_string_array(mounted);
612 /* Terminate the array with NULL pointers. */
613 devices[n_devices].node = NULL;
614 devices[n_devices].devname = NULL;
615 devices[n_devices].label = NULL;
616 devices[n_devices].description = NULL;
617 devices[n_devices].mount_point = NULL;
619 check_mounts(devices);
626 Frees an array of devices and all strings contained in it.
628 void free_devices(Device *devices)
633 for(i=0; devices[i].node; ++i)
635 free(devices[i].node);
636 free(devices[i].devname);
637 free(devices[i].label);
638 free(devices[i].description);
639 if(devices[i].mount_point)
640 free(devices[i].mount_point);
646 Mounts a device if it was not mounted, or unmounts if it was.
648 int toggle_device(Device *device, char *out_buf, int out_size)
650 int umount = !!device->mount_point;
651 char mount_point[1024];
655 struct timeval timeout;
662 /* Find a mount point that does not exist yet. */
667 len = snprintf(mount_point, sizeof(mount_point), "/media/%s", device->label);
668 if(len+2>=(int)sizeof(mount_point))
672 len += snprintf(mount_point+len, sizeof(mount_point)-len, "_%c", suffix);
674 if(access(mount_point, F_OK)<0 && errno==ENOENT)
694 printf("Running pumount %s\n", device->node);
696 printf("Running pmount %s %s\n", device->node, mount_point+7);
704 execl("/usr/bin/pumount", "pumount", device->node, NULL);
706 execl("/usr/bin/pmount", "pmount", device->node, mount_point+7, NULL);
716 FD_SET(pipe_fd[0], &fds);
718 timeout.tv_usec = 200000;
722 /* The write fd for the pipe may be inherited by a fuse server
723 process and stay open indefinitely. */
724 if(select(pipe_fd[0]+1, &fds, NULL, NULL, &timeout))
728 len = read(pipe_fd[0], out_buf+pos, out_size-pos-1);
733 else if(waitpid(pid, &status, 0))
742 waitpid(pid, &status, 0);
748 if(WIFEXITED(status))
750 if(WEXITSTATUS(status))
751 printf("Command exited successfully\n");
753 printf("Command exited with status %d\n", WEXITSTATUS(status));
755 else if(WIFSIGNALED(status))
756 printf("Command terminated with signal %d\n", WTERMSIG(status));
758 printf("Command exited with unknown result %04X\n", status);
761 if(!WIFEXITED(status) || WEXITSTATUS(status))
766 free(device->mount_point);
767 device->mount_point = NULL;
770 device->mount_point = strdup(mount_point);
776 Refreshes both the internal devices array and the GUI list.
778 int refresh_devices(GuiContext *context, int umount)
781 GtkTreeSelection *selection;
787 store = GTK_LIST_STORE(gtk_tree_view_get_model(GTK_TREE_VIEW(context->list)));
788 gtk_list_store_clear(store);
790 free_devices(context->devices);
792 context->devices = get_devices();
793 if(!context->devices)
796 selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(context->list));
798 /* Populate the list with devices in appropriate state. */
801 for(i=0; context->devices[i].node; ++i)
805 dev = &context->devices[i];
806 if(umount<0 || !dev->mount_point==!umount)
808 gtk_list_store_append(store, &iter);
809 gtk_list_store_set(store, &iter,
812 2, !!dev->mount_point,
817 /* Pre-select the device that appeared on the system most recently. */
819 gtk_tree_selection_select_iter(selection, &iter);
830 Handles an automatic refresh of the device list in response to inotify events.
832 gboolean refresh_devices_idle(gpointer data)
834 GuiContext *context = (GuiContext *)data;
836 refresh_devices(context, -1);
837 context->refresh_pending = 0;
843 Callback for selection in the device list changing. Updates the action button
844 label according to device status.
846 void selection_changed(GtkTreeSelection *selection, gpointer user_data)
848 GuiContext *context = (GuiContext *)user_data;
853 if(!gtk_tree_selection_get_selected(selection, &model, &iter))
856 gtk_tree_model_get(model, &iter, 1, &device, -1);
857 gtk_button_set_label(GTK_BUTTON(context->button), (device->mount_point ? "Unmount" : "Mount"));
861 Callback for activating a row in the device list. Mounts or unmounts the
862 device depending on operating mode.
864 void row_activated(GtkTreeView *list, GtkTreePath *path, GtkTreeViewColumn *column, gpointer user_data)
866 GuiContext *context = (GuiContext *)user_data;
874 model = gtk_tree_view_get_model(list);
876 if(!gtk_tree_model_get_iter(model, &iter, path))
879 gtk_tree_model_get(model, &iter, 1, &device, -1);
880 ret = toggle_device(device, output, sizeof(output));
885 /* Pmount terminated with nonzero status or a signal. Display an
886 error to the user. */
887 dialog = gtk_message_dialog_new(NULL, 0, GTK_MESSAGE_ERROR, GTK_BUTTONS_OK, "%s", output);
889 g_signal_connect(dialog, "response", G_CALLBACK(>k_widget_destroy), dialog);
891 g_signal_connect(dialog, "response", G_CALLBACK(>k_main_quit), NULL);
892 gtk_widget_show_all(dialog);
898 gtk_list_store_set(GTK_LIST_STORE(model), &iter,
899 2, !!device->mount_point,
900 3, device->mount_point,
903 gtk_button_set_label(GTK_BUTTON(context->button), (device->mount_point ? "Unmount" : "Mount"));
908 if(context->post_mount_command && device->mount_point)
911 printf("Running %s in %s\n", context->post_mount_command, device->mount_point);
916 chdir(device->mount_point);
917 execlp(context->post_mount_command, context->post_mount_command, NULL);
927 Callback for the mount/unmount button. Causes the selected row in the device
928 list to be activated.
930 void button_clicked(GtkButton *button, gpointer user_data)
932 GuiContext *context = (GuiContext *)user_data;
933 GtkTreeSelection *selection;
937 GtkTreeViewColumn *column;
939 selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(context->list));
940 gtk_tree_selection_get_selected(selection, &model, &iter);
941 path = gtk_tree_model_get_path(model, &iter);
942 column = gtk_tree_view_get_column(GTK_TREE_VIEW(context->list), 0);
943 gtk_tree_view_row_activated(GTK_TREE_VIEW(context->list), path, column);
944 gtk_tree_path_free(path);
950 Global key press callback for the window.
952 gboolean key_press(GtkWidget *widget, GdkEvent *event, gpointer user_data)
954 if(event->key.keyval==GDK_KEY_Escape)
967 Callback for inotify events.
969 gboolean inotify_event_available(GIOChannel *source, GIOCondition condition, gpointer user_data)
971 GuiContext *context = (GuiContext *)user_data;
973 char eventbuf[sizeof(struct inotify_event)+NAME_MAX+1];
976 fd = g_io_channel_unix_get_fd(source);
977 len = read(fd, eventbuf, sizeof(eventbuf));
978 if(len>=(int)sizeof(struct inotify_event))
980 if(!context->refresh_pending)
982 g_timeout_add(500, &refresh_devices_idle, context);
983 context->refresh_pending = 1;
994 printf("pmount-gui\n"
995 "Copyright (c) 2011-2015 Mikko Rasa, Mikkosoft Productions\n\n"
996 "Usage: pmount-gui [-v] [-u] [-r <command>] [-h]\n\n"
998 " -v Increase verbosity\n"
999 " -u Unmount a device (default is mount)\n"
1000 " -r Run a command after mounting\n"
1001 " -m Start a persistent mount manager\n"
1002 " -h Display this help\n");
1005 int main(int argc, char **argv)
1010 GtkWidget *viewport;
1011 GtkListStore *store;
1012 GtkTreeSelection *selection;
1013 GtkCellRenderer *mounted_toggle;
1018 context.manager = 0;
1019 context.devices = NULL;
1020 context.post_mount_command = NULL;
1021 context.inotify_fd = -1;
1022 context.dev_wd = -1;
1023 context.inotify_channel = NULL;
1024 context.refresh_pending = 0;
1026 gtk_init(&argc, &argv);
1028 while((opt = getopt(argc, argv, "vur:mh"))!=-1) switch(opt)
1037 context.post_mount_command = optarg;
1040 context.manager = 1;
1047 window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
1048 gtk_container_set_border_width(GTK_CONTAINER(window), 5);
1049 g_signal_connect(window, "destroy", G_CALLBACK(>k_main_quit), NULL);
1050 g_signal_connect(window, "key-press-event", G_CALLBACK(&key_press), NULL);
1052 box = gtk_vbox_new(FALSE, 5);
1053 gtk_container_add(GTK_CONTAINER(window), box);
1055 viewport = gtk_viewport_new(NULL, NULL);
1056 gtk_viewport_set_shadow_type(GTK_VIEWPORT(viewport), GTK_SHADOW_IN);
1057 gtk_box_pack_start(GTK_BOX(box), viewport, TRUE, TRUE, 0);
1059 context.list = gtk_tree_view_new();
1060 gtk_container_add(GTK_CONTAINER(viewport), context.list);
1061 g_signal_connect(context.list, "row-activated", G_CALLBACK(&row_activated), &context);
1063 store = gtk_list_store_new(4, G_TYPE_STRING, G_TYPE_POINTER, G_TYPE_BOOLEAN, G_TYPE_STRING);
1064 gtk_tree_view_set_model(GTK_TREE_VIEW(context.list), GTK_TREE_MODEL(store));
1065 gtk_tree_view_insert_column_with_attributes(GTK_TREE_VIEW(context.list),
1066 -1, "Device", gtk_cell_renderer_text_new(), "text", 0, NULL);
1070 GtkTreeViewColumn *mounted_column;
1071 GtkCellRenderer *mount_point_renderer;
1073 mounted_column = gtk_tree_view_column_new();
1074 gtk_tree_view_column_set_title(mounted_column, "Mounted");
1076 mounted_toggle = gtk_cell_renderer_toggle_new();
1077 gtk_tree_view_column_pack_start(mounted_column, mounted_toggle, FALSE);
1078 gtk_tree_view_column_add_attribute(mounted_column, mounted_toggle, "active", 2);
1080 mount_point_renderer = gtk_cell_renderer_text_new();
1081 gtk_tree_view_column_pack_start(mounted_column, mount_point_renderer, TRUE);
1082 gtk_tree_view_column_add_attribute(mounted_column, mount_point_renderer, "text", 3);
1084 gtk_tree_view_insert_column(GTK_TREE_VIEW(context.list), mounted_column, -1);
1086 context.inotify_fd = inotify_init();
1087 if(context.inotify_fd>=0)
1089 context.dev_wd = inotify_add_watch(context.inotify_fd, "/dev/disk/by-id", IN_CREATE|IN_DELETE);
1091 context.inotify_channel = g_io_channel_unix_new(context.inotify_fd);
1092 g_io_add_watch(context.inotify_channel, G_IO_IN, &inotify_event_available, &context);
1095 printf("Warning: Unable to initialize inotify\n");
1100 selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(context.list));
1101 g_signal_connect(selection, "changed", G_CALLBACK(&selection_changed), &context);
1103 context.button = gtk_button_new_with_label(umount ? "Unmount" : "Mount");
1104 g_signal_connect(context.button, "clicked", G_CALLBACK(&button_clicked), &context);
1105 gtk_box_pack_start(GTK_BOX(box), context.button, FALSE, TRUE, 0);
1107 n_listed = refresh_devices(&context, umount);
1109 if(n_listed || context.manager)
1110 gtk_widget_show_all(window);
1115 /* Don't show the main window if no devices were listed. */
1116 dialog = gtk_message_dialog_new(NULL, 0, GTK_MESSAGE_WARNING, GTK_BUTTONS_OK,
1117 "No devices to %s", (umount ? "unmount" : "mount"));
1118 g_signal_connect(dialog, "response", G_CALLBACK(>k_main_quit), NULL);
1119 gtk_widget_show_all(dialog);
1124 free_devices(context.devices);
1125 if(context.inotify_fd>=0)
1126 close(context.inotify_fd);