mirrors/coreutils
0
0
Fork 0
mirror of https://github.com/coreutils/coreutils.git synced 2024-12-11 19:04:13 +08:00
Code Issues Packages Projects Releases Wiki Activity
13221a5a13
coreutils/lib/mountlist.c
Jim Meyering b150c16ebc Include unlocked-io.h after all system headers. 
Remove explicit declarations of xmalloc, xrealloc,
and xstrdup.  Instead, include "xalloc.h".
2001-11-17 13:50:40 +00:00

807 lines
20 KiB
C
Raw Blame History

/* mountlist.c -- return a list of mounted filesystems
Copyright (C) 1991, 1992, 1997-2001 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>
#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
#include "xalloc.h"
#ifndef strstr
char *strstr ();
#endif
#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 /* OSF_1 and Darwin1.3.x */
# if HAVE_SYS_UCRED_H
# include <sys/ucred.h> /* needed by powerpc-apple-darwin1.3.7 */
# endif
# if HAVE_SYS_MOUNT_H
# include <sys/mount.h>
# endif
# if HAVE_SYS_FS_TYPES_H
# include <sys/fs_types.h> /* needed by powerpc-apple-darwin1.3.7 */
# endif
# if HAVE_STRUCT_FSSTAT_F_FSTYPENAME
# define FS_TYPE(Ent) ((Ent).f_fstypename)
# else
# define FS_TYPE(Ent) mnt_names[(Ent).f_type]
# endif
#endif /* MOUNTED_GETFSSTAT */
#ifdef MOUNTED_GETMNTENT1 /* 4.3BSD, SunOS, HP-UX, Dynix, Irix. */
# include <mntent.h>
# if !defined MOUNTED
# if defined _PATH_MOUNTED /* GNU libc */
# define MOUNTED _PATH_MOUNTED
# endif
# 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_FS_STAT_DEV /* BeOS. */
# include <fs_info.h>
# include <dirent.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
#include "mountlist.h"
#include "unlocked-io.h"
#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 (char *) (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_FS_STAT_DEV /* BeOS */
{
/* The next_dev() and fs_stat_dev() system calls give the list of
all filesystems, including the information returned by statvfs()
(fs type, total blocks, free blocks etc.), but without the mount
point. But on BeOS all filesystems except / are mounted in the
rootfs, directly under /.
The directory name of the mount point is often, but not always,
identical to the volume name of the device.
We therefore get the list of subdirectories of /, and the list
of all filesystems, and match the two lists. */
DIR *dirp;
struct rootdir_entry
{
char *name;
dev_t dev;
ino_t ino;
struct rootdir_entry *next;
};
struct rootdir_entry *rootdir_list;
struct rootdir_entry **rootdir_tail;
int32 pos;
dev_t dev;
fs_info fi;
/* All volumes are mounted in the rootfs, directly under /. */
rootdir_list = NULL;
rootdir_tail = &rootdir_list;
dirp = opendir ("/");
if (dirp)
{
struct dirent *d;
while ((d = readdir (dirp)) != NULL)
{
char *name;
struct stat statbuf;
if (strcmp (d->d_name, "..") == 0)
continue;
if (strcmp (d->d_name, ".") == 0)
name = xstrdup ("/");
else
{
name = xmalloc (1 + strlen (d->d_name) + 1);
name[0] = '/';
strcpy (name + 1, d->d_name);
}
if (lstat (name, &statbuf) >= 0 && S_ISDIR (statbuf.st_mode))
{
struct rootdir_entry *re;
re = (struct rootdir_entry *) xmalloc (sizeof (struct rootdir_entry));
re->name = name;
re->dev = statbuf.st_dev;
re->ino = statbuf.st_ino;
/* Add to the linked list. */
*rootdir_tail = re;
rootdir_tail = &re->next;
}
else
free (name);
}
closedir (dirp);
}
*rootdir_tail = NULL;
for (pos = 0; (dev = next_dev (&pos)) >= 0; )
if (fs_stat_dev (dev, &fi) >= 0)
{
/* Note: fi.dev == dev. */
struct rootdir_entry *re;
for (re = rootdir_list; re; re = re->next)
if (re->dev == fi.dev && re->ino == fi.root)
break;
me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry));
me->me_devname = xstrdup (fi.device_name[0] != '\0' ? fi.device_name : fi.fsh_name);
me->me_mountdir = xstrdup (re != NULL ? re->name : fi.fsh_name);
me->me_type = xstrdup (fi.fsh_name);
me->me_dev = fi.dev;
me->me_dummy = 0;
me->me_remote = (fi.flags & B_FS_IS_SHARED) != 0;
/* Add to the linked list. */
*mtail = me;
mtail = &me->me_next;
}
*mtail = NULL;
while (rootdir_list != NULL)
{
struct rootdir_entry *re = rootdir_list;
rootdir_list = re->next;
free (re->name);
free (re);
}
}
#endif /* MOUNTED_FS_STAT_DEV */
#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 = xstrdup (FS_TYPE (stats[counter]));
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)
{
char *options, *ignore;
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));
options = thisent + vmp->vmt_data[VMT_ARGS].vmt_off;
ignore = strstr (options, "ignore");
me->me_dummy = (ignore
&& (ignore == options || ignore[-1] == ',')
&& (ignore[sizeof "ignore" - 1] == ','
|| ignore[sizeof "ignore" - 1] == '\0'));
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;
}
}
Reference in New Issue View Git Blame Copy Permalink