main.c

   1 #include <stdlib.h>
   2 #include <stdio.h>
   3 #include <string.h>
   4 #include <unistd.h>
   5 #include <fcntl.h>
   6 #include <dirent.h>
   7 #include <mntent.h>
   8 #include <sys/stat.h>
   9 #include <sys/wait.h>
  10 #include <gtk/gtk.h>
  11 #include <gdk/gdkkeysyms.h>
  12
  13 typedef struct sProperty
  14 {
  15         char *name;
  16         char *value;
  17 } Property;
  18
  19 typedef struct sDevice
  20 {
  21         char *node;
  22         char *label;
  23         char *description;
  24         int mounted;
  25         time_t time;
  26 } Device;
  27
  28 int verbosity = 0;
  29
  30 int parse_property(char *str, int size, Property *prop)
  31 {
  32         int equals = -1;
  33         int i;
  34
  35         for(i=0; (equals<0 && i<size); ++i)
  36                 if(str[i]=='=')
  37                         equals = i;
  38
  39         if(equals<0)
  40                 return -1;
  41
  42         prop->name = malloc(equals+1);
  43         strncpy(prop->name, str, equals);
  44         prop->name[equals] = 0;
  45
  46         prop->value = malloc(size-equals);
  47         strncpy(prop->value, str+equals+1, size-equals-1);
  48         prop->value[size-equals-1] = 0;
  49
  50         return 0;
  51 }
  52
  53 Property *get_device_properties(char *node)
  54 {
  55         int pid;
  56         int pipe_fd[2];
  57
  58         pipe(pipe_fd);
  59
  60         pid = fork();
  61         if(pid==0)
  62         {
  63                 if(verbosity>=2)
  64                         printf("Running udevadm info -q property -n \"%s\"\n", node);
  65
  66                 close(pipe_fd[0]);
  67                 dup2(pipe_fd[1], 1);
  68
  69                 execl("/sbin/udevadm", "udevadm", "info", "-q", "property", "-n", node, NULL);
  70                 _exit(1);
  71         }
  72         else if(pid>0)
  73         {
  74                 char *buf;
  75                 int bufsize;
  76                 int pos = 0;
  77                 int eof = 0;
  78                 Property *props = NULL;
  79                 int n_props = 0;
  80
  81                 close(pipe_fd[1]);
  82
  83                 bufsize = 256;
  84                 buf = (char *)malloc(bufsize);
  85
  86                 while(1)
  87                 {
  88                         int newline;
  89                         int i;
  90                         Property prop;
  91
  92                         if(!eof)
  93                         {
  94                                 int len;
  95
  96                                 len = read(pipe_fd[0], buf+pos, bufsize-pos);
  97                                 if(len==0)
  98                                         eof = 1;
  99                                 else if(len==-1)
 100                                         break;
 101                                 pos += len;
 102                         }
 103
 104                         newline = -1;
 105                         for(i=0; (newline<0 && i<pos); ++i)
 106                                 if(buf[i]=='\n')
 107                                         newline = i;
 108
 109                         if(newline<0)
 110                         {
 111                                 if(eof)
 112                                         break;
 113                                 bufsize *= 2;
 114                                 buf = (char *)realloc(buf, bufsize);
 115                                 continue;
 116                         }
 117
 118                         if(parse_property(buf, newline, &prop)==0)
 119                         {
 120                                 props = (Property *)realloc(props, (n_props+2)*sizeof(Property));
 121                                 props[n_props] = prop;
 122                                 ++n_props;
 123
 124                                 memmove(buf, buf+newline+1, pos-newline-1);
 125                                 pos -= newline+1;
 126                         }
 127                         else
 128                                 break;
 129                 }
 130
 131                 free(buf);
 132
 133                 if(props)
 134                 {
 135                         props[n_props].name = NULL;
 136                         props[n_props].value = NULL;
 137                 }
 138
 139                 waitpid(pid, NULL, 0);
 140                 close(pipe_fd[0]);
 141
 142                 return props;
 143         }
 144         else
 145         {
 146                 close(pipe_fd[0]);
 147                 close(pipe_fd[1]);
 148
 149                 return NULL;
 150         }
 151 }
 152
 153 char *get_property_value(Property *props, char *name)
 154 {
 155         int i;
 156         for(i=0; props[i].name; ++i)
 157                 if(strcmp(props[i].name, name)==0)
 158                         return props[i].value;
 159         return NULL;
 160 }
 161
 162 int match_property_value(Property *props, char *name, char *value)
 163 {
 164         char *v = get_property_value(props, name);
 165         if(!v)
 166                 return value==NULL;
 167         return strcmp(v, value)==0;
 168 }
 169
 170 void free_properties(Property *props)
 171 {
 172         int i;
 173         if(!props)
 174                 return;
 175         for(i=0; props[i].name; ++i)
 176         {
 177                 free(props[i].name);
 178                 free(props[i].value);
 179         }
 180         free(props);
 181 }
 182
 183 char **get_mounted_devices(void)
 184 {
 185         FILE *mtab;
 186         struct mntent *me;
 187         char **mounted = NULL;
 188         int n_mounted = 0;
 189
 190         mtab = setmntent("/etc/mtab", "r");
 191         if(!mtab)
 192                 return NULL;
 193
 194         while((me = getmntent(mtab)))
 195         {
 196                 mounted = (char **)realloc(mounted, (n_mounted+2)*sizeof(char *));
 197                 mounted[n_mounted] = strdup(me->mnt_fsname);
 198                 ++n_mounted;
 199         }
 200
 201         endmntent(mtab);
 202         mounted[n_mounted] = NULL;
 203
 204         return mounted;
 205 }
 206
 207 int is_mounted(char **mounted, char *devname)
 208 {
 209         int i;
 210         for(i=0; mounted[i]; ++i)
 211                 if(!strcmp(devname, mounted[i]))
 212                         return 1;
 213         return 0;
 214 }
 215
 216 void free_mounted_devices(char **mounted)
 217 {
 218         int i;
 219         if(!mounted)
 220                 return;
 221         for(i=0; mounted[i]; ++i)
 222                 free(mounted[i]);
 223         free(mounted);
 224 }
 225
 226 int is_removable(char *devpath)
 227 {
 228         char fnbuf[256];
 229         int len;
 230         char *ptr;
 231         int fd;
 232
 233         len = snprintf(fnbuf, sizeof(fnbuf), "/sys%s", devpath);
 234         if(len+10>=(int)sizeof(fnbuf))
 235                 return 0;
 236
 237         for(ptr=fnbuf+len; (ptr>fnbuf && *ptr!='/'); --ptr) ;
 238         strcpy(ptr, "/removable");
 239         fd = open(fnbuf, O_RDONLY);
 240         if(fd!=-1)
 241         {
 242                 char c;
 243                 read(fd, &c, 1);
 244                 close(fd);
 245                 if(c=='1')
 246                 {
 247                         if(verbosity>=2)
 248                                 printf("  Removable\n");
 249                         return 1;
 250                 }
 251                 if(verbosity>=2)
 252                         printf("  Not removable\n");
 253         }
 254
 255         return 0;
 256 }
 257
 258 int check_buses(char *devpath, char **buses)
 259 {
 260         char fnbuf[256];
 261         char *ptr;
 262         int len;
 263
 264         len = snprintf(fnbuf, sizeof(fnbuf), "/sys%s", devpath);
 265         if(len+10>=(int)sizeof(fnbuf))
 266                 return 0;
 267
 268         for(ptr=fnbuf+len; ptr>fnbuf+12; --ptr)
 269                 if(*ptr=='/')
 270                 {
 271                         char linkbuf[256];
 272                         strcpy(ptr, "/subsystem");
 273                         len = readlink(fnbuf, linkbuf, sizeof(linkbuf)-1);
 274                         *ptr = 0;
 275
 276                         if(len!=-1)
 277                         {
 278                                 int i;
 279                                 linkbuf[len] = 0;
 280                                 for(; (len>0 && linkbuf[len-1]!='/'); --len) ;
 281                                 if(verbosity>=2)
 282                                         printf("  Subsystem of %s is %s\n", fnbuf, linkbuf+len);
 283                                 for(i=0; buses[i]; ++i)
 284                                         if(strcmp(linkbuf+len, buses[i])==0)
 285                                                 return 1;
 286                         }
 287                 }
 288
 289         return 0;
 290 }
 291
 292 int can_mount(Property *props)
 293 {
 294         static char *removable_buses[] = { "usb", "firewire", 0 };
 295         char *devpath;
 296         int i;
 297
 298         if(!match_property_value(props, "DEVTYPE", "partition"))
 299                 return 0;
 300
 301         devpath = get_property_value(props, "DEVPATH");
 302         if(is_removable(devpath))
 303                 return 1;
 304
 305         for(i=0; removable_buses[i]; ++i)
 306                 if(match_property_value(props, "ID_BUS", removable_buses[i]))
 307                         return 1;
 308
 309         return check_buses(devpath, removable_buses);
 310 }
 311
 312 char **get_device_nodes(char *dirname)
 313 {
 314         DIR *dir;
 315         struct dirent *de;
 316         char fnbuf[256];
 317         char linkbuf[256];
 318         struct stat st;
 319         char **nodes = NULL;
 320         int n_nodes = 0;
 321         char **checked = NULL;
 322         int n_checked = 0;
 323         int i;
 324
 325         dir = opendir(dirname);
 326         if(!dir)
 327                 return NULL;
 328
 329         while((de = readdir(dir)))
 330         {
 331                 char *node;
 332                 int duplicate = 0;
 333
 334                 if(de->d_name[0]=='.' && (de->d_name[1]==0 || (de->d_name[1]=='.' && de->d_name[2]==0)))
 335                         continue;
 336
 337                 snprintf(fnbuf, sizeof(fnbuf), "%s/%s", dirname, de->d_name);
 338
 339                 node = fnbuf;
 340                 lstat(fnbuf, &st);
 341                 if(S_ISLNK(st.st_mode))
 342                 {
 343                         int len;
 344                         len = readlink(fnbuf, linkbuf, sizeof(linkbuf)-1);
 345                         if(len!=-1)
 346                         {
 347                                 linkbuf[len] = 0;
 348                                 node = linkbuf;
 349                         }
 350                 }
 351
 352                 if(checked)
 353                 {
 354                         for(i=0; (!duplicate && i<n_checked); ++i)
 355                                 if(strcmp(node, checked[i])==0)
 356                                         duplicate = 1;
 357                 }
 358                 if(duplicate)
 359                 {
 360                         if(verbosity>=2)
 361                                 printf("Device %s is a duplicate\n", fnbuf);
 362                         continue;
 363                 }
 364
 365                 checked = (char **)realloc(checked, (n_checked+1)*sizeof(char *));
 366                 checked[n_checked] = strdup(node);
 367                 ++n_checked;
 368
 369                 nodes = (char **)realloc(nodes, (n_nodes+2)*sizeof(char *));
 370                 nodes[n_nodes] = strdup(fnbuf);
 371                 ++n_nodes;
 372         }
 373
 374         closedir(dir);
 375         if(checked)
 376         {
 377                 for(i=0; i<n_checked; ++i)
 378                         free(checked[i]);
 379                 free(checked);
 380         }
 381
 382         if(nodes)
 383                 nodes[n_nodes] = NULL;
 384
 385         return nodes;
 386 }
 387
 388 Device *get_devices(void)
 389 {
 390         char **nodes = NULL;
 391         Device *devices = NULL;
 392         int n_devices = 0;
 393         char **mounted = NULL;
 394         int i;
 395
 396         nodes = get_device_nodes("/dev/disk/by-id");
 397         mounted = get_mounted_devices();
 398
 399         for(i=0; nodes[i]; ++i)
 400         {
 401                 if(verbosity>=1)
 402                         printf("Examining device %s\n", nodes[i]);
 403
 404                 Property *props = get_device_properties(nodes[i]);
 405                 if(!props)
 406                 {
 407                         if(verbosity>=2)
 408                                 printf("  No properties\n");
 409                         continue;
 410                 }
 411
 412                 if(verbosity>=2)
 413                 {
 414                         int j;
 415                         for(j=0; props[j].name; ++j)
 416                                 printf("  %s = %s\n", props[j].name, props[j].value);
 417                 }
 418
 419                 if(can_mount(props))
 420                 {
 421                         char *devname;
 422                         char *label;
 423                         char *vendor;
 424                         char *model;
 425                         char buf[256];
 426                         char pos;
 427                         struct stat st;
 428
 429                         if(verbosity>=1)
 430                                 printf("  Using device\n");
 431
 432                         devname = get_property_value(props, "DEVNAME");
 433
 434                         label = get_property_value(props, "ID_FS_LABEL");
 435                         if(!label)
 436                                 label = get_property_value(props, "ID_FS_UUID");
 437                         if(!label)
 438                         {
 439                                 char *ptr;
 440
 441                                 label = devname;
 442                                 for(ptr=label; *ptr; ++ptr)
 443                                         if(*ptr=='/')
 444                                                 label = ptr+1;
 445                         }
 446
 447                         vendor = get_property_value(props, "ID_VENDOR");
 448                         model = get_property_value(props, "ID_MODEL");
 449
 450                         pos = snprintf(buf, sizeof(buf), "%s", label);
 451                         if(vendor && model)
 452                                 pos += snprintf(buf+pos, sizeof(buf)-pos, " (%s %s)", vendor, model);
 453
 454                         stat(nodes[i], &st);
 455
 456                         devices = (Device *)realloc(devices, (n_devices+2)*sizeof(Device));
 457                         devices[n_devices].node = nodes[i];
 458                         devices[n_devices].label = strdup(label);
 459                         devices[n_devices].description = strdup(buf);
 460                         devices[n_devices].mounted = is_mounted(mounted, devname);
 461                         devices[n_devices].time = st.st_mtime;
 462                         ++n_devices;
 463                 }
 464                 else
 465                         free(nodes[i]);
 466                 free_properties(props);
 467         }
 468
 469         free(nodes);
 470         free_mounted_devices(mounted);
 471
 472         if(devices)
 473         {
 474                 devices[n_devices].node = NULL;
 475                 devices[n_devices].label = NULL;
 476                 devices[n_devices].description = NULL;
 477         }
 478
 479         return devices;
 480 }
 481
 482 void free_devices(Device *devices)
 483 {
 484         int i;
 485         if(!devices)
 486                 return;
 487         for(i=0; devices[i].node; ++i)
 488         {
 489                 free(devices[i].node);
 490                 free(devices[i].label);
 491                 free(devices[i].description);
 492         }
 493         free(devices);
 494 }
 495
 496 void row_activated(GtkTreeView *list, GtkTreePath *path, GtkTreeViewColumn *column, gpointer user_data)
 497 {
 498         GtkTreeModel *model;
 499         GtkTreeIter iter;
 500         int umount = *(int *)user_data;
 501
 502         model = gtk_tree_view_get_model(list);
 503
 504         if(gtk_tree_model_get_iter(model, &iter, path))
 505         {
 506                 Device *device;
 507                 int pid;
 508                 int pipe_fd[2];
 509
 510                 gtk_tree_model_get(model, &iter, 1, &device, -1);
 511
 512                 pipe(pipe_fd);
 513
 514                 pid = fork();
 515                 if(pid==0)
 516                 {
 517                         if(verbosity>=1)
 518                         {
 519                                 if(umount)
 520                                         printf("Running pumount %s\n", device->node);
 521                                 else
 522                                         printf("Running pmount %s %s\n", device->node, device->label);
 523                         }
 524
 525                         close(pipe_fd[0]);
 526                         dup2(pipe_fd[1], 1);
 527                         dup2(pipe_fd[1], 2);
 528
 529                         if(umount)
 530                                 execl("/usr/bin/pumount", "pumount", device->node, NULL);
 531                         else
 532                                 execl("/usr/bin/pmount", "pmount", device->node, device->label, NULL);
 533                         _exit(1);
 534                 }
 535                 else if(pid>0)
 536                 {
 537                         char buf[1024];
 538                         int pos = 0;
 539                         int status;
 540
 541                         close(pipe_fd[1]);
 542
 543                         while(1)
 544                         {
 545                                 int len;
 546
 547                                 len = read(pipe_fd[0], buf+pos, sizeof(buf)-pos-1);
 548                                 if(len<=0)
 549                                         break;
 550                                 pos += len;
 551                         }
 552
 553                         buf[pos] = 0;
 554
 555                         waitpid(pid, &status, 0);
 556                         if(!WIFEXITED(status) || WEXITSTATUS(status))
 557                         {
 558                                 GtkWidget *dialog;
 559
 560                                 dialog = gtk_message_dialog_new(NULL, 0, GTK_MESSAGE_ERROR, GTK_BUTTONS_OK, "%s", buf);
 561                                 g_signal_connect(dialog, "response", &gtk_main_quit, NULL);
 562                                 gtk_widget_show_all(dialog);
 563                         }
 564                         else
 565                                 gtk_main_quit();
 566                 }
 567                 else
 568                 {
 569                 }
 570         }
 571
 572         (void)column;
 573 }
 574
 575 gboolean key_press(GtkWidget *widget, GdkEvent *event, gpointer user_data)
 576 {
 577         if(event->key.keyval==GDK_KEY_Escape)
 578         {
 579                 gtk_main_quit();
 580                 return TRUE;
 581         }
 582
 583         (void)widget;
 584         (void)user_data;
 585
 586         return FALSE;
 587 }
 588
 589 int main(int argc, char **argv)
 590 {
 591         GtkWidget *window;
 592         GtkWidget *viewport;
 593         GtkWidget *list;
 594         GtkListStore *store;
 595         GtkTreeSelection *selection;
 596         GtkTreeIter iter;
 597         Device *devices;
 598         int i;
 599         time_t latest;
 600         int opt;
 601         int umount = 0;
 602         int n_listed;
 603
 604         gtk_init(&argc, &argv);
 605
 606         while((opt = getopt(argc, argv, "vu"))!=-1) switch(opt)
 607         {
 608         case 'v':
 609                 ++verbosity;
 610                 break;
 611         case 'u':
 612                 umount = 1;
 613                 break;
 614         }
 615
 616         window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 617         gtk_container_set_border_width(GTK_CONTAINER(window), 5);
 618         g_signal_connect(window, "destroy", G_CALLBACK(&gtk_main_quit), NULL);
 619         g_signal_connect(window, "key-press-event", G_CALLBACK(&key_press), NULL);
 620
 621         viewport = gtk_viewport_new(NULL, NULL);
 622         gtk_viewport_set_shadow_type(GTK_VIEWPORT(viewport), GTK_SHADOW_IN);
 623         gtk_container_add(GTK_CONTAINER(window), viewport);
 624
 625         list = gtk_tree_view_new();
 626         gtk_container_add(GTK_CONTAINER(viewport), list);
 627         g_signal_connect(list, "row-activated", G_CALLBACK(&row_activated), &umount);
 628
 629         store = gtk_list_store_new(2, G_TYPE_STRING, G_TYPE_POINTER);
 630         gtk_tree_view_set_model(GTK_TREE_VIEW(list), GTK_TREE_MODEL(store));
 631         gtk_tree_view_insert_column_with_attributes(GTK_TREE_VIEW(list),
 632                 -1, "Device", gtk_cell_renderer_text_new(), "text", 0, NULL);
 633
 634         selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(list));
 635
 636         devices = get_devices();
 637         n_listed = 0;
 638         if(devices)
 639         {
 640                 latest = 0;
 641                 for(i=0; devices[i].node; ++i)
 642                         if(!devices[i].mounted==!umount)
 643                         {
 644                                 gtk_list_store_append(store, &iter);
 645                                 gtk_list_store_set(store, &iter, 0, devices[i].description, 1, &devices[i], -1);
 646                                 if(devices[i].time>latest)
 647                                 {
 648                                         latest = devices[i].time;
 649                                         gtk_tree_selection_select_iter(selection, &iter);
 650                                 }
 651
 652                                 ++n_listed;
 653                         }
 654
 655         }
 656
 657         if(n_listed)
 658                 gtk_widget_show_all(window);
 659         else
 660         {
 661                 GtkWidget *dialog;
 662
 663                 dialog = gtk_message_dialog_new(NULL, 0, GTK_MESSAGE_WARNING, GTK_BUTTONS_OK,
 664                         "No devices to %s", (umount ? "unmount" : "mount"));
 665                 g_signal_connect(dialog, "response", G_CALLBACK(&gtk_main_quit), NULL);
 666                 gtk_widget_show_all(dialog);
 667         }
 668
 669         gtk_main();
 670
 671         free_devices(devices);
 672
 673         return 0;
 674 }