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/acd", DRIVE_CDROM},
  60   {"/dev/aztcd", DRIVE_CDROM},
  61   {"/dev/bpcd", DRIVE_CDROM},
  62   {"/dev/cd", DRIVE_CDROM},
  63   {"/dev/cdrom", DRIVE_CDROM},
  64   {"/dev/cdu535", DRIVE_CDROM},
  65   {"/dev/cdwriter", DRIVE_CDROM},
  66   {"/dev/cm205cd", DRIVE_CDROM},
  67   {"/dev/cm206cd", DRIVE_CDROM},
  68   {"/dev/gscd", DRIVE_CDROM},
  69   {"/dev/hitcd", DRIVE_CDROM},
  70   {"/dev/iseries/vcd", DRIVE_CDROM},
  71   {"/dev/lmscd", DRIVE_CDROM},
  72   {"/dev/mcd", DRIVE_CDROM},
  73   {"/dev/optcd", DRIVE_CDROM},
  74   {"/dev/pcd", DRIVE_CDROM},
  75   {"/dev/sbpcd", DRIVE_CDROM},
  76   {"/dev/scd", DRIVE_CDROM},
  77   {"/dev/sjcd", DRIVE_CDROM},
  78   {"/dev/sonycd", DRIVE_CDROM},
  79   {"/dev/sr", DRIVE_CDROM},
  80   {"",0}
  81 };
  82
  83 static const char * const ignored_fstypes[] = {
  84     "devpts",
  85     "tmpfs",
  86     "proc",
  87     "sysfs",
  88     "swap",
  89     "usbdevfs",
  90     "rpc_pipefs",
  91     "binfmt_misc",
  92     NULL
  93 };
  94
  95 static const char * const ignored_mnt_dirs[] = {
  96     "/boot",
  97     NULL
  98 };
  99
 100 static int try_dev_node(char *dev)
 101 {
 102     const DEV_NODES *pDevNodes = sDeviceNodes;
 103
 104     while(pDevNodes->szNode[0])
 105     {
 106         if(!strncmp(dev,pDevNodes->szNode,strlen(pDevNodes->szNode)))
 107             return pDevNodes->nType;
 108         ++pDevNodes;
 109     }
 110
 111     return DRIVE_FIXED;
 112 }
 113
 114 static BOOL should_ignore_fstype(char *type)
 115 {
 116     const char * const *s;
 117
 118     for (s = ignored_fstypes; *s; s++)
 119         if (!strcmp(*s, type)) return TRUE;
 120
 121     return FALSE;
 122 }
 123
 124 static BOOL should_ignore_mnt_dir(char *dir)
 125 {
 126     const char * const *s;
 127
 128     for (s = ignored_mnt_dirs; *s; s++)
 129         if (!strcmp(*s, dir)) return TRUE;
 130
 131     return FALSE;
 132 }
 133
 134 static BOOL is_drive_defined(char *path)
 135 {
 136     int i;
 137
 138     for (i = 0; i < 26; i++)
 139         if (drives[i].in_use && !strcmp(drives[i].unixpath, path)) return TRUE;
 140
 141     return FALSE;
 142 }
 143
 144 /* returns Z + 1 if there are no more available letters */
 145 static char allocate_letter(int type)
 146 {
 147     char letter, start;
 148
 149     if (type == DRIVE_REMOVABLE)
 150         start = 'A';
 151     else
 152         start = 'C';
 153
 154     for (letter = start; letter <= 'Z'; letter++)
 155         if ((DRIVE_MASK_BIT(letter) & working_mask) != 0) break;
 156
 157     return letter;
 158 }
 159 #endif
 160
 161 #define FSTAB_OPEN 1
 162 #define NO_MORE_LETTERS 2
 163 #define NO_ROOT 3
 164 #define NO_DRIVE_C 4
 165 #define NO_HOME 5
 166
 167 static void report_error(int code)
 168 {
 169     char *buffer;
 170     int len;
 171
 172     switch (code)
 173     {
 174         case FSTAB_OPEN:
 175             if (gui_mode)
 176             {
 177                 static const char s[] = "Could not open your mountpoint description table.\n\nOpening of /etc/fstab failed: %s";
 178                 len = snprintf(NULL, 0, s, strerror(errno));
 179                 buffer = HeapAlloc(GetProcessHeap(), 0, len + 1);
 180                 snprintf(buffer, len, s, strerror(errno));
 181                 MessageBoxA(NULL, s, "", MB_OK | MB_ICONEXCLAMATION);
 182                 HeapFree(GetProcessHeap(), 0, buffer);
 183             }
 184             else
 185             {
 186                 fprintf(stderr, "winecfg: could not open fstab: %s\n", strerror(errno));
 187             }
 188             break;
 189
 190         case NO_MORE_LETTERS:
 191             if (gui_mode) MessageBoxA(NULL, "No more letters are available to auto-detect available drives with.", "", MB_OK | MB_ICONEXCLAMATION);
 192             fprintf(stderr, "winecfg: no more available letters while scanning /etc/fstab\n");
 193             break;
 194
 195         case NO_ROOT:
 196             if (gui_mode) MessageBoxA(NULL, "Could not ensure that the root directory was mapped.\n\n"
 197                                      "This can happen if you run out of drive letters. "
 198                                      "It's important to have the root directory mapped, otherwise Wine"
 199                                      "will not be able to always find the programs you want to run. "
 200                                      "Try unmapping a drive letter then trying again.", "",
 201                                      MB_OK | MB_ICONEXCLAMATION);
 202             else fprintf(stderr, "winecfg: unable to map root drive\n");
 203             break;
 204
 205         case NO_DRIVE_C:
 206             if (gui_mode)
 207                 MessageBoxA(NULL, "No virtual drive C mapped!\n", "", MB_OK | MB_ICONEXCLAMATION);
 208             else
 209                 fprintf(stderr, "winecfg: no drive_c directory\n");
 210             break;
 211         case NO_HOME:
 212             if (gui_mode)
 213                 MessageBoxA(NULL, "Could not ensure that your home directory was mapped.\n\n"
 214                                  "This can happen if you run out of drive letters. "
 215                                  "Try unmapping a drive letter then try again.", "",
 216                                  MB_OK | MB_ICONEXCLAMATION);
 217             else
 218                 fprintf(stderr, "winecfg: unable to map home drive\n");
 219             break;
 220     }
 221 }
 222
 223 static void ensure_root_is_mapped(void)
 224 {
 225     int i;
 226     BOOL mapped = FALSE;
 227
 228     for (i = 0; i < 26; i++)
 229         if (drives[i].in_use && !strcmp(drives[i].unixpath, "/")) mapped = TRUE;
 230
 231     if (!mapped)
 232     {
 233         /* work backwards from Z, trying to map it */
 234         char letter;
 235
 236         for (letter = 'Z'; letter >= 'A'; letter--)
 237         {
 238             if (!drives[letter - 'A'].in_use)
 239             {
 240                 add_drive(letter, "/", NULL, NULL, 0, DRIVE_FIXED);
 241                 WINE_TRACE("allocated drive %c as the root drive\n", letter);
 242                 break;
 243             }
 244         }
 245
 246         if (letter == ('A' - 1)) report_error(NO_ROOT);
 247     }
 248 }
 249
 250 static void ensure_home_is_mapped(void)
 251 {
 252     int i;
 253     BOOL mapped = FALSE;
 254     char *home = getenv("HOME");
 255
 256     if (!home) return;
 257
 258     for (i = 0; i < 26; i++)
 259         if (drives[i].in_use && !strcmp(drives[i].unixpath, home)) mapped = TRUE;
 260
 261     if (!mapped)
 262     {
 263         char letter;
 264
 265         for (letter = 'H'; letter <= 'Z'; letter++)
 266         {
 267             if (!drives[letter - 'A'].in_use)
 268             {
 269                 add_drive(letter, home, NULL, NULL, 0, DRIVE_FIXED);
 270                 WINE_TRACE("allocated drive %c as the user's home directory\n", letter);
 271                 break;
 272             }
 273         }
 274         if (letter == ('Z' + 1)) report_error(NO_HOME);
 275     }
 276 }
 277
 278 static void ensure_drive_c_is_mapped(void)
 279 {
 280     struct stat buf;
 281     const char *configdir = wine_get_config_dir();
 282     int len;
 283     char *drive_c_dir;
 284
 285     if (drives[2].in_use) return;
 286
 287     len = snprintf(NULL, 0, "%s/../drive_c", configdir);
 288     drive_c_dir = HeapAlloc(GetProcessHeap(), 0, len);
 289     snprintf(drive_c_dir, len, "%s/../drive_c", configdir);
 290     HeapFree(GetProcessHeap(), 0, drive_c_dir);
 291
 292     if (stat(drive_c_dir, &buf) == 0)
 293     {
 294         WCHAR label[64];
 295         LoadStringW (GetModuleHandleW(NULL), IDS_SYSTEM_DRIVE_LABEL, label,
 296                      sizeof(label)/sizeof(label[0]));
 297         add_drive('C', "../drive_c", NULL, label, 0, DRIVE_FIXED);
 298     }
 299     else
 300     {
 301         report_error(NO_DRIVE_C);
 302     }
 303 }
 304
 305 int autodetect_drives(void)
 306 {
 307 #ifdef HAVE_MNTENT_H
 308     struct mntent *ent;
 309     FILE *fstab;
 310 #endif
 311
 312     /* we want to build a list of autodetected drives, then ensure each entry
 313        exists in the users setup. so, we superimpose the autodetected drives
 314        onto whatever is pre-existing.
 315
 316        for now let's just rummage around inside the fstab.
 317      */
 318
 319     load_drives();
 320
 321     working_mask = drive_available_mask('\0');
 322
 323 #ifdef HAVE_MNTENT_H
 324     fstab = fopen("/etc/fstab", "r");
 325     if (!fstab)
 326     {
 327         report_error(FSTAB_OPEN);
 328         return FALSE;
 329     }
 330
 331     while ((ent = getmntent(fstab)))
 332     {
 333         char letter;
 334         int type;
 335         char *device = NULL;
 336
 337         WINE_TRACE("ent->mnt_dir=%s\n", ent->mnt_dir);
 338
 339         if (should_ignore_fstype(ent->mnt_type)) continue;
 340         if (should_ignore_mnt_dir(ent->mnt_dir)) continue;
 341         if (is_drive_defined(ent->mnt_dir)) continue;
 342
 343         if (!strcmp(ent->mnt_type, "nfs")) type = DRIVE_REMOTE;
 344         else if (!strcmp(ent->mnt_type, "nfs4")) type = DRIVE_REMOTE;
 345         else if (!strcmp(ent->mnt_type, "smbfs")) type = DRIVE_REMOTE;
 346         else if (!strcmp(ent->mnt_type, "cifs")) type = DRIVE_REMOTE;
 347         else if (!strcmp(ent->mnt_type, "coda")) type = DRIVE_REMOTE;
 348         else if (!strcmp(ent->mnt_type, "iso9660")) type = DRIVE_CDROM;
 349         else if (!strcmp(ent->mnt_type, "ramfs")) type = DRIVE_RAMDISK;
 350         else type = try_dev_node(ent->mnt_fsname);
 351
 352         /* allocate a drive for it */
 353         letter = allocate_letter(type);
 354         if (letter == 'Z' + 1)
 355         {
 356             report_error(NO_MORE_LETTERS);
 357             fclose(fstab);
 358             return FALSE;
 359         }
 360
 361         if (type == DRIVE_CDROM) device = ent->mnt_fsname;
 362
 363         WINE_TRACE("adding drive %c for %s, device %s, type %s\n",
 364                    letter, ent->mnt_dir, device, ent->mnt_type);
 365         add_drive(letter, ent->mnt_dir, device, NULL, 0, type);
 366
 367         /* working_mask is a map of the drive letters still available. */
 368         working_mask &= ~DRIVE_MASK_BIT(letter);
 369     }
 370
 371     fclose(fstab);
 372 #endif
 373
 374     ensure_root_is_mapped();
 375
 376     ensure_drive_c_is_mapped();
 377
 378     ensure_home_is_mapped();
 379
 380     return TRUE;
 381 }