programs/winecfg/drivedetect.c

   1 /*
   2  * Drive autodetection code
   3  *
   4  * Copyright 2004 Mike Hearn
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  *
  20  */
  21
  22 #include "config.h"
  23 #include "wine/port.h"
  24
  25 #include <stdarg.h>
  26 #include <stdio.h>
  27 #ifdef HAVE_MNTENT_H
  28 #include <mntent.h>
  29 #endif
  30 #include <stdlib.h>
  31 #include <errno.h>
  32 #include <sys/stat.h>
  33
  34 #include <windef.h>
  35 #include <winbase.h>
  36 #include <wine/debug.h>
  37 #include <wine/library.h>
  38
  39 #include "winecfg.h"
  40 #include "resource.h"
  41
  42
  43 WINE_DEFAULT_DEBUG_CHANNEL(winecfg);
  44
  45 BOOL gui_mode = TRUE;
  46 static ULONG working_mask = 0;
  47
  48 typedef struct
  49 {
  50   const char *szNode;
  51   int nType;
  52 } DEV_NODES;
  53
  54 #ifdef HAVE_MNTENT_H
  55
  56 static const DEV_NODES sDeviceNodes[] = {
  57   {"/dev/fd", DRIVE_REMOVABLE},
  58   {"/dev/pf", DRIVE_REMOVABLE},
  59   {"/dev/aztcd", DRIVE_CDROM},
  60   {"/dev/bpcd", DRIVE_CDROM},
  61   {"/dev/cdrom", DRIVE_CDROM},
  62   {"/dev/cdu535", DRIVE_CDROM},
  63   {"/dev/cdwriter", DRIVE_CDROM},
  64   {"/dev/cm205cd", DRIVE_CDROM},
  65   {"/dev/cm206cd", DRIVE_CDROM},
  66   {"/dev/gscd", DRIVE_CDROM},
  67   {"/dev/hitcd", DRIVE_CDROM},
  68   {"/dev/iseries/vcd", DRIVE_CDROM},
  69   {"/dev/lmscd", DRIVE_CDROM},
  70   {"/dev/mcd", DRIVE_CDROM},
  71   {"/dev/optcd", DRIVE_CDROM},
  72   {"/dev/pcd", DRIVE_CDROM},
  73   {"/dev/sbpcd", DRIVE_CDROM},
  74   {"/dev/scd", DRIVE_CDROM},
  75   {"/dev/sjcd", DRIVE_CDROM},
  76   {"/dev/sonycd", DRIVE_CDROM},
  77   {"/dev/sr", DRIVE_CDROM},
  78   {"",0}
  79 };
  80
  81 static const char * const ignored_fstypes[] = {
  82     "devpts",
  83     "tmpfs",
  84     "proc",
  85     "sysfs",
  86     "swap",
  87     "usbdevfs",
  88     "rpc_pipefs",
  89     "binfmt_misc",
  90     NULL
  91 };
  92
  93 static const char * const ignored_mnt_dirs[] = {
  94     "/boot",
  95     NULL
  96 };
  97
  98 static int try_dev_node(char *dev)
  99 {
 100     const DEV_NODES *pDevNodes = sDeviceNodes;
 101
 102     while(pDevNodes->szNode[0])
 103     {
 104         if(!strncmp(dev,pDevNodes->szNode,strlen(pDevNodes->szNode)))
 105             return pDevNodes->nType;
 106         ++pDevNodes;
 107     }
 108
 109     return DRIVE_FIXED;
 110 }
 111
 112 static BOOL should_ignore_fstype(char *type)
 113 {
 114     const char * const *s;
 115
 116     for (s = ignored_fstypes; *s; s++)
 117         if (!strcmp(*s, type)) return TRUE;
 118
 119     return FALSE;
 120 }
 121
 122 static BOOL should_ignore_mnt_dir(char *dir)
 123 {
 124     const char * const *s;
 125
 126     for (s = ignored_mnt_dirs; *s; s++)
 127         if (!strcmp(*s, dir)) return TRUE;
 128
 129     return FALSE;
 130 }
 131
 132 static BOOL is_drive_defined(char *path)
 133 {
 134     int i;
 135
 136     for (i = 0; i < 26; i++)
 137         if (drives[i].in_use && !strcmp(drives[i].unixpath, path)) return TRUE;
 138
 139     return FALSE;
 140 }
 141
 142 /* returns Z + 1 if there are no more available letters */
 143 static char allocate_letter(int type)
 144 {
 145     char letter, start;
 146
 147     if (type == DRIVE_REMOVABLE)
 148         start = 'A';
 149     else
 150         start = 'C';
 151
 152     for (letter = start; letter <= 'Z'; letter++)
 153         if ((DRIVE_MASK_BIT(letter) & working_mask) != 0) break;
 154
 155     return letter;
 156 }
 157 #endif
 158
 159 #define FSTAB_OPEN 1
 160 #define NO_MORE_LETTERS 2
 161 #define NO_ROOT 3
 162 #define NO_DRIVE_C 4
 163 #define NO_HOME 5
 164
 165 static void report_error(int code)
 166 {
 167     char *buffer;
 168     int len;
 169
 170     switch (code)
 171     {
 172         case FSTAB_OPEN:
 173             if (gui_mode)
 174             {
 175                 static const char s[] = "Could not open your mountpoint description table.\n\nOpening of /etc/fstab failed: %s";
 176                 len = snprintf(NULL, 0, s, strerror(errno));
 177                 buffer = HeapAlloc(GetProcessHeap(), 0, len + 1);
 178                 snprintf(buffer, len, s, strerror(errno));
 179                 MessageBox(NULL, s, "", MB_OK | MB_ICONEXCLAMATION);
 180                 HeapFree(GetProcessHeap(), 0, buffer);
 181             }
 182             else
 183             {
 184                 fprintf(stderr, "winecfg: could not open fstab: %s\n", strerror(errno));
 185             }
 186             break;
 187
 188         case NO_MORE_LETTERS:
 189             if (gui_mode) MessageBox(NULL, "No more letters are available to auto-detect available drives with.", "", MB_OK | MB_ICONEXCLAMATION);
 190             fprintf(stderr, "winecfg: no more available letters while scanning /etc/fstab\n");
 191             break;
 192
 193         case NO_ROOT:
 194             if (gui_mode) MessageBox(NULL, "Could not ensure that the root directory was mapped.\n\n"
 195                                      "This can happen if you run out of drive letters. "
 196                                      "It's important to have the root directory mapped, otherwise Wine"
 197                                      "will not be able to always find the programs you want to run. "
 198                                      "Try unmapping a drive letter then trying again.", "",
 199                                      MB_OK | MB_ICONEXCLAMATION);
 200             else fprintf(stderr, "winecfg: unable to map root drive\n");
 201             break;
 202
 203         case NO_DRIVE_C:
 204             if (gui_mode)
 205                 MessageBox(NULL, "No virtual drive C mapped\n\nTry running wineprefixcreate", "", MB_OK | MB_ICONEXCLAMATION);
 206             else
 207                 fprintf(stderr, "winecfg: no drive_c directory\n");
 208
 209         case NO_HOME:
 210             if (gui_mode)
 211                 MessageBox(NULL, "Could not ensure that your home directory was mapped.\n\n"
 212                                  "This can happen if you run out of drive letters. "
 213                                  "Try unmapping a drive letter then try again.", "",
 214                                  MB_OK | MB_ICONEXCLAMATION);
 215             else
 216                 fprintf(stderr, "winecfg: unable to map home drive\n");
 217             break;
 218     }
 219 }
 220
 221 static void ensure_root_is_mapped(void)
 222 {
 223     int i;
 224     BOOL mapped = FALSE;
 225
 226     for (i = 0; i < 26; i++)
 227         if (drives[i].in_use && !strcmp(drives[i].unixpath, "/")) mapped = TRUE;
 228
 229     if (!mapped)
 230     {
 231         /* work backwards from Z, trying to map it */
 232         char letter;
 233
 234         for (letter = 'Z'; letter >= 'A'; letter--)
 235         {
 236             if (!drives[letter - 'A'].in_use)
 237             {
 238                 add_drive(letter, "/", NULL, NULL, 0, DRIVE_FIXED);
 239                 WINE_TRACE("allocated drive %c as the root drive\n", letter);
 240                 break;
 241             }
 242         }
 243
 244         if (letter == ('A' - 1)) report_error(NO_ROOT);
 245     }
 246 }
 247
 248 static void ensure_home_is_mapped(void)
 249 {
 250     int i;
 251     BOOL mapped = FALSE;
 252     char *home = getenv("HOME");
 253
 254     if (!home) return;
 255
 256     for (i = 0; i < 26; i++)
 257         if (drives[i].in_use && !strcmp(drives[i].unixpath, home)) mapped = TRUE;
 258
 259     if (!mapped)
 260     {
 261         char letter;
 262
 263         for (letter = 'H'; letter <= 'Z'; letter++)
 264         {
 265             if (!drives[letter - 'A'].in_use)
 266             {
 267                 add_drive(letter, home, NULL, NULL, 0, DRIVE_FIXED);
 268                 WINE_TRACE("allocated drive %c as the user's home directory\n", letter);
 269                 break;
 270             }
 271         }
 272         if (letter == ('Z' + 1)) report_error(NO_HOME);
 273     }
 274 }
 275
 276 static void ensure_drive_c_is_mapped(void)
 277 {
 278     struct stat buf;
 279     const char *configdir = wine_get_config_dir();
 280     int len;
 281     char *drive_c_dir;
 282
 283     if (drives[2].in_use) return;
 284
 285     len = snprintf(NULL, 0, "%s/../drive_c", configdir);
 286     drive_c_dir = HeapAlloc(GetProcessHeap(), 0, len);
 287     snprintf(drive_c_dir, len, "%s/../drive_c", configdir);
 288     HeapFree(GetProcessHeap(), 0, drive_c_dir);
 289
 290     if (stat(drive_c_dir, &buf) == 0)
 291     {
 292         WCHAR label[64];
 293         LoadStringW (GetModuleHandle (NULL), IDS_SYSTEM_DRIVE_LABEL, label,
 294                      sizeof(label)/sizeof(label[0]));
 295         add_drive('C', "../drive_c", NULL, label, 0, DRIVE_FIXED);
 296     }
 297     else
 298     {
 299         report_error(NO_DRIVE_C);
 300     }
 301 }
 302
 303 int autodetect_drives(void)
 304 {
 305 #ifdef HAVE_MNTENT_H
 306     struct mntent *ent;
 307     FILE *fstab;
 308 #endif
 309
 310     /* we want to build a list of autodetected drives, then ensure each entry
 311        exists in the users setup. so, we superimpose the autodetected drives
 312        onto whatever is pre-existing.
 313
 314        for now let's just rummage around inside the fstab.
 315      */
 316
 317     load_drives();
 318
 319     working_mask = drive_available_mask('\0');
 320
 321 #ifdef HAVE_MNTENT_H
 322     fstab = fopen("/etc/fstab", "r");
 323     if (!fstab)
 324     {
 325         report_error(FSTAB_OPEN);
 326         return FALSE;
 327     }
 328
 329     while ((ent = getmntent(fstab)))
 330     {
 331         char letter;
 332         int type;
 333         char *device = NULL;
 334
 335         WINE_TRACE("ent->mnt_dir=%s\n", ent->mnt_dir);
 336
 337         if (should_ignore_fstype(ent->mnt_type)) continue;
 338         if (should_ignore_mnt_dir(ent->mnt_dir)) continue;
 339         if (is_drive_defined(ent->mnt_dir)) continue;
 340
 341         if (!strcmp(ent->mnt_type, "nfs")) type = DRIVE_REMOTE;
 342         else if (!strcmp(ent->mnt_type, "nfs4")) type = DRIVE_REMOTE;
 343         else if (!strcmp(ent->mnt_type, "smbfs")) type = DRIVE_REMOTE;
 344         else if (!strcmp(ent->mnt_type, "cifs")) type = DRIVE_REMOTE;
 345         else if (!strcmp(ent->mnt_type, "coda")) type = DRIVE_REMOTE;
 346         else if (!strcmp(ent->mnt_type, "iso9660")) type = DRIVE_CDROM;
 347         else if (!strcmp(ent->mnt_type, "ramfs")) type = DRIVE_RAMDISK;
 348         else type = try_dev_node(ent->mnt_fsname);
 349
 350         /* allocate a drive for it */
 351         letter = allocate_letter(type);
 352         if (letter == 'Z' + 1)
 353         {
 354             report_error(NO_MORE_LETTERS);
 355             fclose(fstab);
 356             return FALSE;
 357         }
 358
 359         if (type == DRIVE_CDROM) device = ent->mnt_fsname;
 360
 361         WINE_TRACE("adding drive %c for %s, device %s, type %s\n",
 362                    letter, ent->mnt_dir, device, ent->mnt_type);
 363         add_drive(letter, ent->mnt_dir, device, NULL, 0, type);
 364
 365         /* working_mask is a map of the drive letters still available. */
 366         working_mask &= ~DRIVE_MASK_BIT(letter);
 367     }
 368
 369     fclose(fstab);
 370 #endif
 371
 372     ensure_root_is_mapped();
 373
 374     ensure_drive_c_is_mapped();
 375
 376     ensure_home_is_mapped();
 377
 378     return TRUE;
 379 }