/* mountlist.c -- return a list of mounted file systems
- Copyright (C) 1991, 1992, 1997-2004 Free Software Foundation, Inc.
+
+ Copyright (C) 1991, 1992, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
+ 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
-#if HAVE_CONFIG_H
-# include <config.h>
-#endif
+#include <config.h>
+
+#include "mountlist.h"
+#include <limits.h>
#include <stdio.h>
-#include <sys/types.h>
#include <stdlib.h>
#include <string.h>
#include "xalloc.h"
-#ifndef strstr
-char *strstr ();
-#endif
-
#include <errno.h>
-#ifdef HAVE_FCNTL_H
-# include <fcntl.h>
-#endif
+#include <fcntl.h>
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include <unistd.h>
#if HAVE_SYS_PARAM_H
# include <sys/param.h>
# include <sys/mount.h>
#endif
+#ifdef MOUNTED_GETMNTINFO2 /* NetBSD 3.0. */
+# include <sys/statvfs.h>
+#endif
+
#ifdef MOUNTED_GETMNT /* Ultrix. */
# include <sys/mount.h>
# include <sys/fs_types.h>
# define MNT_IGNORE(M) 0
#endif
-#include "mountlist.h"
-
#if USE_UNLOCKED_IO
# include "unlocked-io.h"
#endif
# define SIZE_MAX ((size_t) -1)
#endif
+/* The results of open() in this file are not used with fchdir,
+ therefore save some unnecessary work in fchdir.c. */
+#undef open
+#undef close
+
+/* The results of opendir() in this file are not used with dirfd and fchdir,
+ therefore save some unnecessary work in fchdir.c. */
+#undef opendir
+#undef closedir
+
+#ifndef ME_DUMMY
+# define ME_DUMMY(Fs_name, Fs_type) \
+ (strcmp (Fs_type, "autofs") == 0 \
+ || strcmp (Fs_type, "none") == 0 \
+ || strcmp (Fs_type, "proc") == 0 \
+ || strcmp (Fs_type, "subfs") == 0 \
+ /* for NetBSD 3.0 */ \
+ || strcmp (Fs_type, "kernfs") == 0 \
+ /* for Irix 6.5 */ \
+ || strcmp (Fs_type, "ignore") == 0)
+#endif
+
+#ifndef ME_REMOTE
+/* A file system is `remote' if its Fs_name contains a `:'
+ or if (it is of type (smbfs or cifs) and its Fs_name starts with `//'). */
+# define ME_REMOTE(Fs_name, Fs_type) \
+ (strchr (Fs_name, ':') != NULL \
+ || ((Fs_name)[0] == '/' \
+ && (Fs_name)[1] == '/' \
+ && (strcmp (Fs_type, "smbfs") == 0 \
+ || strcmp (Fs_type, "cifs") == 0)))
+#endif
+
#if MOUNTED_GETMNTINFO
-# if ! HAVE_F_FSTYPENAME_IN_STATFS
+# if ! HAVE_STRUCT_STATFS_F_FSTYPENAME
static char *
fstype_to_string (short int t)
{
return "?";
}
}
-# endif /* ! HAVE_F_FSTYPENAME_IN_STATFS */
+# endif
-/* __NetBSD__ || BSD_NET2 || __OpenBSD__ */
static char *
fsp_to_string (const struct statfs *fsp)
{
-# if defined HAVE_F_FSTYPENAME_IN_STATFS
+# if HAVE_STRUCT_STATFS_F_FSTYPENAME
return (char *) (fsp->f_fstypename);
# else
return fstype_to_string (fsp->f_type);
}
#endif /* MOUNTED_VMOUNT */
+
+#if defined MOUNTED_GETMNTENT1 || defined MOUNTED_GETMNTENT2
+
+/* Return the device number from MOUNT_OPTIONS, if possible.
+ Otherwise return (dev_t) -1. */
+
+static dev_t
+dev_from_mount_options (char const *mount_options)
+{
+ /* GNU/Linux allows file system implementations to define their own
+ meaning for "dev=" mount options, so don't trust the meaning
+ here. */
+# ifndef __linux__
+
+ static char const dev_pattern[] = ",dev=";
+ char const *devopt = strstr (mount_options, dev_pattern);
+
+ if (devopt)
+ {
+ char const *optval = devopt + sizeof dev_pattern - 1;
+ char *optvalend;
+ unsigned long int dev;
+ errno = 0;
+ dev = strtoul (optval, &optvalend, 16);
+ if (optval != optvalend
+ && (*optvalend == '\0' || *optvalend == ',')
+ && ! (dev == ULONG_MAX && errno == ERANGE)
+ && dev == (dev_t) dev)
+ return dev;
+ }
+
+# endif
+
+ return -1;
+}
+
+#endif
+
/* Return a list of the currently mounted file systems, or NULL on error.
Add each entry to the tail of the list so that they stay in order.
If NEED_FS_TYPE is true, ensure that the file system type fields in
}
#endif
-#ifdef MOUNTED_GETMNTENT1 /* 4.3BSD, SunOS, HP-UX, Dynix, Irix. */
+#ifdef MOUNTED_GETMNTENT1 /* GNU/Linux, 4.3BSD, SunOS, HP-UX, Dynix, Irix. */
{
struct mntent *mnt;
char *table = MOUNTED;
FILE *fp;
- char *devopt;
fp = setmntent (table, "r");
if (fp == NULL)
me->me_type_malloced = 1;
me->me_dummy = ME_DUMMY (me->me_devname, me->me_type);
me->me_remote = ME_REMOTE (me->me_devname, me->me_type);
- devopt = strstr (mnt->mnt_opts, "dev=");
- if (devopt)
- me->me_dev = strtoul (devopt + 4, NULL, 16);
- else
- me->me_dev = (dev_t) -1; /* Magic; means not known yet. */
+ me->me_dev = dev_from_mount_options (mnt->mnt_opts);
/* Add to the linked list. */
*mtail = me;
}
#endif /* MOUNTED_GETMNTINFO */
+#ifdef MOUNTED_GETMNTINFO2 /* NetBSD 3.0. */
+ {
+ struct statvfs *fsp;
+ int entries;
+
+ entries = getmntinfo (&fsp, MNT_NOWAIT);
+ if (entries < 0)
+ return NULL;
+ for (; entries-- > 0; fsp++)
+ {
+ me = xmalloc (sizeof *me);
+ me->me_devname = xstrdup (fsp->f_mntfromname);
+ me->me_mountdir = xstrdup (fsp->f_mntonname);
+ me->me_type = xstrdup (fsp->f_fstypename);
+ me->me_type_malloced = 1;
+ me->me_dummy = ME_DUMMY (me->me_devname, me->me_type);
+ me->me_remote = ME_REMOTE (me->me_devname, me->me_type);
+ me->me_dev = (dev_t) -1; /* Magic; means not known yet. */
+
+ /* Add to the linked list. */
+ *mtail = me;
+ mtail = &me->me_next;
+ }
+ }
+#endif /* MOUNTED_GETMNTINFO2 */
+
#ifdef MOUNTED_GETMNT /* Ultrix. */
{
int offset = 0;
}
#endif /* MOUNTED_FREAD || MOUNTED_FREAD_FSTYP. */
-#ifdef MOUNTED_GETMNTTBL /* DolphinOS goes it's own way */
+#ifdef MOUNTED_GETMNTTBL /* DolphinOS goes its own way. */
{
struct mntent **mnttbl = getmnttbl (), **ent;
for (ent=mnttbl;*ent;ent++)
me->me_type_malloced = 1;
me->me_dummy = MNT_IGNORE (&mnt) != 0;
me->me_remote = ME_REMOTE (me->me_devname, me->me_type);
- me->me_dev = (dev_t) -1; /* Magic; means not known yet. */
+ me->me_dev = dev_from_mount_options (mnt.mnt_mntopts);
/* Add to the linked list. */
*mtail = me;
me = xmalloc (sizeof *me);
if (vmp->vmt_flags & MNT_REMOTE)
{
- char *host, *path;
+ char *host, *dir;
me->me_remote = 1;
- /* Prepend the remote pathname. */
+ /* Prepend the remote dirname. */
host = thisent + vmp->vmt_data[VMT_HOSTNAME].vmt_off;
- path = thisent + vmp->vmt_data[VMT_OBJECT].vmt_off;
- me->me_devname = xmalloc (strlen (host) + strlen (path) + 2);
+ dir = thisent + vmp->vmt_data[VMT_OBJECT].vmt_off;
+ me->me_devname = xmalloc (strlen (host) + strlen (dir) + 2);
strcpy (me->me_devname, host);
strcat (me->me_devname, ":");
- strcat (me->me_devname, path);
+ strcat (me->me_devname, dir);
}
else
{
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