/* mountlist.c -- return a list of mounted filesystems
Copyright (C) 1991, 1992, 1997, 1998, 1999 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
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program 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 General Public License for more details.
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. */
#if HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <sys/types.h>
#include "mountlist.h"
#ifdef STDC_HEADERS
# include <stdlib.h>
#else
void free ();
#endif
#if defined(STDC_HEADERS) || defined(HAVE_STRING_H)
# include <string.h>
#else
# include <strings.h>
#endif
#ifndef strstr
char *strstr ();
#endif
char *xmalloc ();
char *xrealloc ();
char *xstrdup ();
void error ();
#include <errno.h>
#ifndef errno
extern int errno;
#endif
#ifdef HAVE_FCNTL_H
# include <fcntl.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#if HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif
#if defined (MOUNTED_GETFSSTAT) /* __alpha running OSF_1 */
# include <sys/mount.h>
# include <sys/fs_types.h>
#endif /* MOUNTED_GETFSSTAT */
#ifdef MOUNTED_GETMNTENT1 /* 4.3BSD, SunOS, HP-UX, Dynix, Irix. */
# include <mntent.h>
# if !defined(MOUNTED)
# if defined(MNT_MNTTAB) /* HP-UX. */
# define MOUNTED MNT_MNTTAB
# endif
# if defined(MNTTABNAME) /* Dynix. */
# define MOUNTED MNTTABNAME
# endif
# endif
#endif
#ifdef MOUNTED_GETMNTINFO /* 4.4BSD. */
# include <sys/mount.h>
#endif
#ifdef MOUNTED_GETMNT /* Ultrix. */
# include <sys/mount.h>
# include <sys/fs_types.h>
#endif
#ifdef MOUNTED_FREAD /* SVR2. */
# include <mnttab.h>
#endif
#ifdef MOUNTED_FREAD_FSTYP /* SVR3. */
# include <mnttab.h>
# include <sys/fstyp.h>
# include <sys/statfs.h>
#endif
#ifdef MOUNTED_LISTMNTENT
# include <mntent.h>
#endif
#ifdef MOUNTED_GETMNTENT2 /* SVR4. */
# include <sys/mnttab.h>
#endif
#ifdef MOUNTED_VMOUNT /* AIX. */
# include <fshelp.h>
# include <sys/vfs.h>
#endif
#ifdef DOLPHIN
/* So special that it's not worth putting this in autoconf. */
# undef MOUNTED_FREAD_FSTYP
# define MOUNTED_GETMNTTBL
#endif
#if HAVE_SYS_MNTENT_H
/* This is to get MNTOPT_IGNORE on e.g. SVR4. */
# include <sys/mntent.h>
#endif
#if defined (MNTOPT_IGNORE) && defined (HAVE_HASMNTOPT)
# define MNT_IGNORE(M) hasmntopt ((M), MNTOPT_IGNORE)
#else
# define MNT_IGNORE(M) 0
#endif
#ifdef MOUNTED_GETMNTENT1 /* 4.3BSD, SunOS, HP-UX, Dynix, Irix. */
/* Return the value of the hexadecimal number represented by CP.
No prefix (like '0x') or suffix (like 'h') is expected to be
part of CP. */
/* FIXME: this can overflow */
static int
xatoi (char *cp)
{
int val;
val = 0;
while (*cp)
{
if (*cp >= 'a' && *cp <= 'f')
val = val * 16 + *cp - 'a' + 10;
else if (*cp >= 'A' && *cp <= 'F')
val = val * 16 + *cp - 'A' + 10;
else if (*cp >= '0' && *cp <= '9')
val = val * 16 + *cp - '0';
else
break;
cp++;
}
return val;
}
#endif /* MOUNTED_GETMNTENT1. */
#if MOUNTED_GETMNTINFO
# if ! HAVE_F_FSTYPENAME_IN_STATFS
static char *
fstype_to_string (short t)
{
switch (t)
{
# ifdef MOUNT_PC
case MOUNT_PC:
return "pc";
# endif
# ifdef MOUNT_MFS
case MOUNT_MFS:
return "mfs";
# endif
# ifdef MOUNT_LO
case MOUNT_LO:
return "lo";
# endif
# ifdef MOUNT_TFS
case MOUNT_TFS:
return "tfs";
# endif
# ifdef MOUNT_TMP
case MOUNT_TMP:
return "tmp";
# endif
# ifdef MOUNT_UFS
case MOUNT_UFS:
return "ufs" ;
# endif
# ifdef MOUNT_NFS
case MOUNT_NFS:
return "nfs" ;
# endif
# ifdef MOUNT_MSDOS
case MOUNT_MSDOS:
return "msdos" ;
# endif
# ifdef MOUNT_LFS
case MOUNT_LFS:
return "lfs" ;
# endif
# ifdef MOUNT_LOFS
case MOUNT_LOFS:
return "lofs" ;
# endif
# ifdef MOUNT_FDESC
case MOUNT_FDESC:
return "fdesc" ;
# endif
# ifdef MOUNT_PORTAL
case MOUNT_PORTAL:
return "portal" ;
# endif
# ifdef MOUNT_NULL
case MOUNT_NULL:
return "null" ;
# endif
# ifdef MOUNT_UMAP
case MOUNT_UMAP:
return "umap" ;
# endif
# ifdef MOUNT_KERNFS
case MOUNT_KERNFS:
return "kernfs" ;
# endif
# ifdef MOUNT_PROCFS
case MOUNT_PROCFS:
return "procfs" ;
# endif
# ifdef MOUNT_AFS
case MOUNT_AFS:
return "afs" ;
# endif
# ifdef MOUNT_CD9660
case MOUNT_CD9660:
return "cd9660" ;
# endif
# ifdef MOUNT_UNION
case MOUNT_UNION:
return "union" ;
# endif
# ifdef MOUNT_DEVFS
case MOUNT_DEVFS:
return "devfs" ;
# endif
# ifdef MOUNT_EXT2FS
case MOUNT_EXT2FS:
return "ext2fs" ;
# endif
default:
return "?";
}
}
# endif /* ! HAVE_F_FSTYPENAME_IN_STATFS */
/* __NetBSD__ || BSD_NET2 || __OpenBSD__ */
static char *
fsp_to_string (const struct statfs *fsp)
{
# if defined HAVE_F_FSTYPENAME_IN_STATFS
return fsp->f_fstypename;
# else
return fstype_to_string (fsp->f_type);
# endif
}
#endif /* MOUNTED_GETMNTINFO */
#ifdef MOUNTED_VMOUNT /* AIX. */
static char *
fstype_to_string (int t)
{
struct vfs_ent *e;
e = getvfsbytype (t);
if (!e || !e->vfsent_name)
return "none";
else
return e->vfsent_name;
}
#endif /* MOUNTED_VMOUNT */
/* Return a list of the currently mounted filesystems, or NULL on error.
Add each entry to the tail of the list so that they stay in order.
If NEED_FS_TYPE is nonzero, ensure that the filesystem type fields in
the returned list are valid. Otherwise, they might not be. */
struct mount_entry *
read_filesystem_list (int need_fs_type)
{
struct mount_entry *mount_list;
struct mount_entry *me;
struct mount_entry **mtail = &mount_list;
#ifdef MOUNTED_LISTMNTENT
{
struct tabmntent *mntlist, *p;
struct mntent *mnt;
struct mount_entry *me;
/* the third and fourth arguments could be used to filter mounts,
but Crays doesn't seem to have any mounts that we want to
remove. Specifically, automount create normal NFS mounts.
*/
if(listmntent(&mntlist, KMTAB, NULL, NULL) < 0)
return NULL;
for (p = mntlist; p; p = p->next) {
mnt = p->ment;
me = (struct mount_entry*) xmalloc(sizeof (struct mount_entry));
me->me_devname = xstrdup(mnt->mnt_fsname);
me->me_mountdir = xstrdup(mnt->mnt_dir);
me->me_type = xstrdup(mnt->mnt_type);
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 = -1;
*mtail = me;
mtail = &me->me_next;
}
freemntlist(mntlist);
}
#endif
#ifdef MOUNTED_GETMNTENT1 /* 4.3BSD, SunOS, HP-UX, Dynix, Irix. */
{
struct mntent *mnt;
char *table = MOUNTED;
FILE *fp;
char *devopt;
fp = setmntent (table, "r");
if (fp == NULL)
return NULL;
while ((mnt = getmntent (fp)))
{
me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry));
me->me_devname = xstrdup (mnt->mnt_fsname);
me->me_mountdir = xstrdup (mnt->mnt_dir);
me->me_type = xstrdup (mnt->mnt_type);
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)
{
if (devopt[4] == '0' && (devopt[5] == 'x' || devopt[5] == 'X'))
me->me_dev = xatoi (devopt + 6);
else
me->me_dev = xatoi (devopt + 4);
}
else
me->me_dev = (dev_t) -1; /* Magic; means not known yet. */
/* Add to the linked list. */
*mtail = me;
mtail = &me->me_next;
}
if (endmntent (fp) == 0)
goto free_then_fail;
}
#endif /* MOUNTED_GETMNTENT1. */
#ifdef MOUNTED_GETMNTINFO /* 4.4BSD. */
{
struct statfs *fsp;
int entries;
entries = getmntinfo (&fsp, MNT_NOWAIT);
if (entries < 0)
return NULL;
for (; entries-- > 0; fsp++)
{
char *fs_type = fsp_to_string (fsp);
me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry));
me->me_devname = xstrdup (fsp->f_mntfromname);
me->me_mountdir = xstrdup (fsp->f_mntonname);
me->me_type = fs_type;
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_GETMNTINFO */
#ifdef MOUNTED_GETMNT /* Ultrix. */
{
int offset = 0;
int val;
struct fs_data fsd;
while (errno = 0,
0 < (val = getmnt (&offset, &fsd, sizeof (fsd), NOSTAT_MANY,
(char *) 0)))
{
me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry));
me->me_devname = xstrdup (fsd.fd_req.devname);
me->me_mountdir = xstrdup (fsd.fd_req.path);
me->me_type = gt_names[fsd.fd_req.fstype];
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 = fsd.fd_req.dev;
/* Add to the linked list. */
*mtail = me;
mtail = &me->me_next;
}
if (val < 0)
goto free_then_fail;
}
#endif /* MOUNTED_GETMNT. */
#if defined (MOUNTED_GETFSSTAT) /* __alpha running OSF_1 */
{
int numsys, counter, bufsize;
struct statfs *stats;
numsys = getfsstat ((struct statfs *)0, 0L, MNT_WAIT);
if (numsys < 0)
return (NULL);
bufsize = (1 + numsys) * sizeof (struct statfs);
stats = (struct statfs *)xmalloc (bufsize);
numsys = getfsstat (stats, bufsize, MNT_WAIT);
if (numsys < 0)
{
free (stats);
return (NULL);
}
for (counter = 0; counter < numsys; counter++)
{
me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry));
me->me_devname = xstrdup (stats[counter].f_mntfromname);
me->me_mountdir = xstrdup (stats[counter].f_mntonname);
me->me_type = mnt_names[stats[counter].f_type];
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;
}
free (stats);
}
#endif /* MOUNTED_GETFSSTAT */
#if defined (MOUNTED_FREAD) || defined (MOUNTED_FREAD_FSTYP) /* SVR[23]. */
{
struct mnttab mnt;
char *table = "/etc/mnttab";
FILE *fp;
fp = fopen (table, "r");
if (fp == NULL)
return NULL;
while (fread (&mnt, sizeof mnt, 1, fp) > 0)
{
me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry));
# ifdef GETFSTYP /* SVR3. */
me->me_devname = xstrdup (mnt.mt_dev);
# else
me->me_devname = xmalloc (strlen (mnt.mt_dev) + 6);
strcpy (me->me_devname, "/dev/");
strcpy (me->me_devname + 5, mnt.mt_dev);
# endif
me->me_mountdir = xstrdup (mnt.mt_filsys);
me->me_dev = (dev_t) -1; /* Magic; means not known yet. */
me->me_type = "";
# ifdef GETFSTYP /* SVR3. */
if (need_fs_type)
{
struct statfs fsd;
char typebuf[FSTYPSZ];
if (statfs (me->me_mountdir, &fsd, sizeof fsd, 0) != -1
&& sysfs (GETFSTYP, fsd.f_fstyp, typebuf) != -1)
me->me_type = xstrdup (typebuf);
}
# endif
me->me_dummy = ME_DUMMY (me->me_devname, me->me_type);
me->me_remote = ME_REMOTE (me->me_devname, me->me_type);
/* Add to the linked list. */
*mtail = me;
mtail = &me->me_next;
}
if (ferror (fp))
{
int saved_errno = errno;
fclose (fp);
errno = saved_errno;
goto free_then_fail;
}
if (fclose (fp) == EOF)
goto free_then_fail;
}
#endif /* MOUNTED_FREAD || MOUNTED_FREAD_FSTYP. */
#ifdef MOUNTED_GETMNTTBL /* DolphinOS goes it's own way */
{
struct mntent **mnttbl=getmnttbl(),**ent;
for (ent=mnttbl;*ent;ent++)
{
me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry));
me->me_devname = xstrdup ( (*ent)->mt_resource);
me->me_mountdir = xstrdup( (*ent)->mt_directory);
me->me_type = xstrdup ((*ent)->mt_fstype);
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;
}
endmnttbl();
}
#endif
#ifdef MOUNTED_GETMNTENT2 /* SVR4. */
{
struct mnttab mnt;
char *table = MNTTAB;
FILE *fp;
int ret;
int lockfd = -1;
# if defined F_RDLCK && defined F_SETLKW
/* MNTTAB_LOCK is a macro name of our own invention; it's not present in
e.g. Solaris 2.6. If the SVR4 folks ever define a macro
for this file name, we should use their macro name instead.
(Why not just lock MNTTAB directly? We don't know.) */
# ifndef MNTTAB_LOCK
# define MNTTAB_LOCK "/etc/.mnttab.lock"
# endif
lockfd = open (MNTTAB_LOCK, O_RDONLY);
if (0 <= lockfd)
{
struct flock flock;
flock.l_type = F_RDLCK;
flock.l_whence = SEEK_SET;
flock.l_start = 0;
flock.l_len = 0;
while (fcntl (lockfd, F_SETLKW, &flock) == -1)
if (errno != EINTR)
{
int saved_errno = errno;
close (lockfd);
errno = saved_errno;
return NULL;
}
}
else if (errno != ENOENT)
return NULL;
# endif
errno = 0;
fp = fopen (table, "r");
if (fp == NULL)
ret = errno;
else
{
while ((ret = getmntent (fp, &mnt)) == 0)
{
me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry));
me->me_devname = xstrdup (mnt.mnt_special);
me->me_mountdir = xstrdup (mnt.mnt_mountp);
me->me_type = xstrdup (mnt.mnt_fstype);
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. */
/* Add to the linked list. */
*mtail = me;
mtail = &me->me_next;
}
ret = fclose (fp) == EOF ? errno : 0 < ret ? 0 : -1;
}
if (0 <= lockfd && close (lockfd) != 0)
ret = errno;
if (0 <= ret)
{
errno = ret;
goto free_then_fail;
}
}
#endif /* MOUNTED_GETMNTENT2. */
#ifdef MOUNTED_VMOUNT /* AIX. */
{
int bufsize;
char *entries, *thisent;
struct vmount *vmp;
/* Ask how many bytes to allocate for the mounted filesystem info. */
mntctl (MCTL_QUERY, sizeof bufsize, (struct vmount *) &bufsize);
entries = xmalloc (bufsize);
/* Get the list of mounted filesystems. */
mntctl (MCTL_QUERY, bufsize, (struct vmount *) entries);
for (thisent = entries; thisent < entries + bufsize;
thisent += vmp->vmt_length)
{
vmp = (struct vmount *) thisent;
me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry));
if (vmp->vmt_flags & MNT_REMOTE)
{
char *host, *path;
me->me_remote = 1;
/* Prepend the remote pathname. */
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);
strcpy (me->me_devname, host);
strcat (me->me_devname, ":");
strcat (me->me_devname, path);
}
else
{
me->me_remote = 0;
me->me_devname = xstrdup (thisent +
vmp->vmt_data[VMT_OBJECT].vmt_off);
}
me->me_mountdir = xstrdup (thisent + vmp->vmt_data[VMT_STUB].vmt_off);
me->me_type = xstrdup (fstype_to_string (vmp->vmt_gfstype));
me->me_dummy = ME_DUMMY (me->me_devname, me->me_type);
me->me_dev = (dev_t) -1; /* vmt_fsid might be the info we want. */
/* Add to the linked list. */
*mtail = me;
mtail = &me->me_next;
}
free (entries);
}
#endif /* MOUNTED_VMOUNT. */
*mtail = NULL;
return mount_list;
free_then_fail:
{
int saved_errno = errno;
*mtail = NULL;
while (mount_list)
{
me = mount_list->me_next;
free (mount_list->me_devname);
free (mount_list->me_mountdir);
/* FIXME: me_type is not always malloced. */
free (mount_list);
mount_list = me;
}
errno = saved_errno;
return NULL;
}
}
