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Sweden-Number/programs/winecfg/drivedetect.c

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/*
* Drive autodetection code
*
* Copyright 2004 Mike Hearn
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "config.h"
#include <wine/debug.h>
#include <wine/library.h>
#include "winecfg.h"
#include <stdio.h>
#ifdef HAVE_MNTENT_H
#include <mntent.h>
#endif
#include <stdlib.h>
#include <errno.h>
#include <sys/stat.h>
#include <winbase.h>
WINE_DEFAULT_DEBUG_CHANNEL(winecfg);
BOOL gui_mode = TRUE;
static long working_mask = 0;
#ifdef HAVE_MNTENT_H
static const DEV_NODES sDeviceNodes[] = {
{"/dev/fd", DRIVE_REMOVABLE},
{"/dev/cdrom", DRIVE_CDROM},
{"",0}
};
static const char * const ignored_fstypes[] = {
"devpts",
"tmpfs",
"proc",
"sysfs",
"swap",
"usbdevfs",
"rpc_pipefs",
NULL
};
static const char * const ignored_mnt_dirs[] = {
"/boot",
NULL
};
static int try_dev_node(char *dev)
{
const DEV_NODES *pDevNodes = sDeviceNodes;
while(pDevNodes->szNode[0])
{
if(!strncmp(dev,pDevNodes->szNode,strlen(pDevNodes->szNode)))
return pDevNodes->nType;
++pDevNodes;
}
return DRIVE_FIXED;
}
static BOOL should_ignore_fstype(char *type)
{
const char * const *s;
for (s = ignored_fstypes; *s; s++)
if (!strcmp(*s, type)) return TRUE;
return FALSE;
}
static BOOL should_ignore_mnt_dir(char *dir)
{
const char * const *s;
for (s = ignored_mnt_dirs; *s; s++)
if (!strcmp(*s, dir)) return TRUE;
return FALSE;
}
static BOOL is_drive_defined(char *path)
{
int i;
for (i = 0; i < 26; i++)
if (drives[i].in_use && !strcmp(drives[i].unixpath, path)) return TRUE;
return FALSE;
}
/* returns Z + 1 if there are no more available letters */
static char allocate_letter(void)
{
char letter;
for (letter = 'C'; letter <= 'Z'; letter++)
if ((DRIVE_MASK_BIT(letter) & working_mask) != 0) break;
return letter;
}
#endif
#define FSTAB_OPEN 1
#define NO_MORE_LETTERS 2
#define NO_ROOT 3
#define NO_DRIVE_C 4
#define NO_HOME 5
static void report_error(int code)
{
char *buffer;
int len;
switch (code)
{
case FSTAB_OPEN:
if (gui_mode)
{
static const char s[] = "Could not open your mountpoint description table.\n\nOpening of /etc/fstab failed: %s";
len = snprintf(NULL, 0, s, strerror(errno));
buffer = HeapAlloc(GetProcessHeap(), 0, len + 1);
snprintf(buffer, len, s, strerror(errno));
MessageBox(NULL, s, "", MB_OK | MB_ICONEXCLAMATION);
HeapFree(GetProcessHeap(), 0, buffer);
}
else
{
fprintf(stderr, "winecfg: could not open fstab: %s\n", strerror(errno));
}
break;
case NO_MORE_LETTERS:
if (gui_mode) MessageBox(NULL, "No more letters are available to auto-detect available drives with.", "", MB_OK | MB_ICONEXCLAMATION);
fprintf(stderr, "winecfg: no more available letters while scanning /etc/fstab\n");
break;
case NO_ROOT:
if (gui_mode) MessageBox(NULL, "Could not ensure that the root directory was mapped.\n\n"
"This can happen if you run out of drive letters. "
"It's important to have the root directory mapped, otherwise Wine"
"will not be able to always find the programs you want to run. "
"Try unmapping a drive letter then trying again.", "",
MB_OK | MB_ICONEXCLAMATION);
else fprintf(stderr, "winecfg: unable to map root drive\n");
break;
case NO_DRIVE_C:
if (gui_mode)
MessageBox(NULL, "No virtual drive C mapped\n\nTry running wineprefixcreate", "", MB_OK | MB_ICONEXCLAMATION);
else
fprintf(stderr, "winecfg: no drive_c directory\n");
case NO_HOME:
if (gui_mode)
MessageBox(NULL, "Could not ensure that your home directory was mapped.\n\n"
"This can happen if you run out of drive letters. "
"Try unmapping a drive letter then try again.", "",
MB_OK | MB_ICONEXCLAMATION);
else
fprintf(stderr, "winecfg: unable to map home drive\n");
break;
}
}
static void ensure_root_is_mapped(void)
{
int i;
BOOL mapped = FALSE;
for (i = 0; i < 26; i++)
if (drives[i].in_use && !strcmp(drives[i].unixpath, "/")) mapped = TRUE;
if (!mapped)
{
/* work backwards from Z, trying to map it */
char letter;
for (letter = 'Z'; letter >= 'A'; letter--)
{
if (!drives[letter - 'A'].in_use)
{
add_drive(letter, "/", "System", "0", DRIVE_FIXED);
WINE_TRACE("allocated drive %c as the root drive\n", letter);
break;
}
}
if (letter == ('A' - 1)) report_error(NO_ROOT);
}
}
static void ensure_home_is_mapped(void)
{
int i;
BOOL mapped = FALSE;
char *home = getenv("HOME");
if (!home) return;
for (i = 0; i < 26; i++)
if (drives[i].in_use && !strcmp(drives[i].unixpath, home)) mapped = TRUE;
if (!mapped)
{
char letter;
for (letter = 'H'; letter <= 'Z'; letter++)
{
if (!drives[letter - 'A'].in_use)
{
add_drive(letter, home, "Home", "0", DRIVE_FIXED);
WINE_TRACE("allocated drive %c as the user's home directory\n", letter);
break;
}
}
if (letter == ('Z' + 1)) report_error(NO_HOME);
}
}
static void ensure_drive_c_is_mapped(void)
{
struct stat buf;
const char *configdir = wine_get_config_dir();
int len;
char *drive_c_dir;
if (drives[2].in_use) return;
len = snprintf(NULL, 0, "%s/../drive_c", configdir);
drive_c_dir = HeapAlloc(GetProcessHeap(), 0, len);
snprintf(drive_c_dir, len, "%s/../drive_c", configdir);
HeapFree(GetProcessHeap(), 0, drive_c_dir);
if (stat(drive_c_dir, &buf) == 0)
{
add_drive('C', "../drive_c", "Virtual Windows Drive", "0", DRIVE_FIXED);
}
else
{
report_error(NO_DRIVE_C);
}
}
int autodetect_drives()
{
#ifdef HAVE_MNTENT_H
struct mntent *ent;
FILE *fstab;
#endif
/* we want to build a list of autodetected drives, then ensure each entry
exists in the users setup. so, we superimpose the autodetected drives
onto whatever is pre-existing.
for now let's just rummage around inside the fstab.
*/
load_drives();
working_mask = drive_available_mask('\0');
#ifdef HAVE_MNTENT_H
fstab = fopen("/etc/fstab", "r");
if (!fstab)
{
report_error(FSTAB_OPEN);
return FALSE;
}
while ((ent = getmntent(fstab)))
{
char letter;
char label[256];
int type;
WINE_TRACE("ent->mnt_dir=%s\n", ent->mnt_dir);
if (should_ignore_fstype(ent->mnt_type)) continue;
if (should_ignore_mnt_dir(ent->mnt_dir)) continue;
if (is_drive_defined(ent->mnt_dir)) continue;
/* allocate a drive for it */
letter = allocate_letter();
if (letter == ']')
{
report_error(NO_MORE_LETTERS);
fclose(fstab);
return FALSE;
}
strcpy(label, "Drive X");
label[6] = letter;
WINE_TRACE("adding drive %c for %s, type %s with label %s\n", letter, ent->mnt_dir, ent->mnt_type,label);
if (!strcmp(ent->mnt_type, "nfs")) type = DRIVE_REMOTE;
else if (!strcmp(ent->mnt_type, "nfs4")) type = DRIVE_REMOTE;
else if (!strcmp(ent->mnt_type, "smbfs")) type = DRIVE_REMOTE;
else if (!strcmp(ent->mnt_type, "cifs")) type = DRIVE_REMOTE;
else if (!strcmp(ent->mnt_type, "coda")) type = DRIVE_REMOTE;
else if (!strcmp(ent->mnt_type, "iso9660")) type = DRIVE_CDROM;
else if (!strcmp(ent->mnt_type, "ramfs")) type = DRIVE_RAMDISK;
else type = try_dev_node(ent->mnt_fsname);
add_drive(letter, ent->mnt_dir, label, "0", type);
/* working_mask is a map of the drive letters still available. */
working_mask &= ~DRIVE_MASK_BIT(letter);
}
fclose(fstab);
#endif
ensure_root_is_mapped();
ensure_drive_c_is_mapped();
ensure_home_is_mapped();
return TRUE;
}
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