1120 lines
31 KiB
C
1120 lines
31 KiB
C
/* mountlist.c -- return a list of mounted file systems
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Copyright (C) 1991-1992, 1997-2023 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#include <config.h>
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#include "mountlist.h"
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdint.h>
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#include "xalloc.h"
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#include <errno.h>
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#include <fcntl.h>
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#include <unistd.h>
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#if HAVE_SYS_PARAM_H
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# include <sys/param.h>
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#endif
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#if MAJOR_IN_MKDEV
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# include <sys/mkdev.h>
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#elif MAJOR_IN_SYSMACROS
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# include <sys/sysmacros.h>
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#endif
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#if defined MOUNTED_GETFSSTAT /* OSF/1, also (obsolete) Apple Darwin 1.3 */
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# if HAVE_SYS_UCRED_H
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# include <grp.h> /* needed on OSF V4.0 for definition of NGROUPS,
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NGROUPS is used as an array dimension in ucred.h */
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# include <sys/ucred.h> /* needed by powerpc-apple-darwin1.3.7 */
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# endif
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# if HAVE_SYS_MOUNT_H
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# include <sys/mount.h>
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# endif
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# if HAVE_SYS_FS_TYPES_H
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# include <sys/fs_types.h> /* needed by powerpc-apple-darwin1.3.7 */
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# endif
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# if HAVE_STRUCT_FSSTAT_F_FSTYPENAME
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# define FS_TYPE(Ent) ((Ent).f_fstypename)
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# else
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# define FS_TYPE(Ent) mnt_names[(Ent).f_type]
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# endif
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#endif /* MOUNTED_GETFSSTAT */
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#ifdef MOUNTED_GETMNTENT1 /* glibc, HP-UX, IRIX, Cygwin, Android,
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also (obsolete) 4.3BSD, SunOS */
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# include <mntent.h>
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# include <sys/types.h>
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# if defined __ANDROID__ /* Android */
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/* Bionic versions from between 2014-01-09 and 2015-01-08 define MOUNTED to
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an incorrect value; older Bionic versions don't define it at all. */
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# undef MOUNTED
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# define MOUNTED "/proc/mounts"
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# elif !defined MOUNTED
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# if defined _PATH_MOUNTED /* GNU libc */
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# define MOUNTED _PATH_MOUNTED
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# endif
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# if defined MNT_MNTTAB /* HP-UX. */
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# define MOUNTED MNT_MNTTAB
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# endif
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# endif
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#endif
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#ifdef MOUNTED_GETMNTINFO /* Mac OS X, FreeBSD, OpenBSD, also (obsolete) 4.4BSD */
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# include <sys/mount.h>
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#endif
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#ifdef MOUNTED_GETMNTINFO2 /* NetBSD, Minix */
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# include <sys/statvfs.h>
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#endif
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#ifdef MOUNTED_FS_STAT_DEV /* Haiku, also (obsolete) BeOS */
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# include <fs_info.h>
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# include <dirent.h>
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#endif
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#ifdef MOUNTED_FREAD_FSTYP /* (obsolete) SVR3 */
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# include <mnttab.h>
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# include <sys/fstyp.h>
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# include <sys/statfs.h>
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#endif
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#ifdef MOUNTED_GETEXTMNTENT /* Solaris >= 8 */
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# include <sys/mnttab.h>
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#endif
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#ifdef MOUNTED_GETMNTENT2 /* Solaris < 8, also (obsolete) SVR4 */
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# include <sys/mnttab.h>
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#endif
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#ifdef MOUNTED_VMOUNT /* AIX */
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# include <fshelp.h>
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# include <sys/vfs.h>
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#endif
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#ifdef MOUNTED_INTERIX_STATVFS /* Interix */
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# include <sys/statvfs.h>
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# include <dirent.h>
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#endif
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#if HAVE_SYS_MNTENT_H
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/* This is to get MNTOPT_IGNORE on e.g. SVR4. */
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# include <sys/mntent.h>
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#endif
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#ifdef MOUNTED_GETMNTENT1
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# if !HAVE_SETMNTENT /* Android <= 4.4 */
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# define setmntent(fp,mode) fopen (fp, mode "e")
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# endif
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# if !HAVE_ENDMNTENT /* Android <= 4.4 */
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# define endmntent(fp) fclose (fp)
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# endif
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#endif
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#ifndef HAVE_HASMNTOPT
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# define hasmntopt(mnt, opt) ((char *) 0)
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#endif
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#undef MNT_IGNORE
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#ifdef MNTOPT_IGNORE
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# if defined __sun && defined __SVR4
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/* Solaris defines hasmntopt(struct mnttab *, char *)
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while it is otherwise hasmntopt(struct mnttab *, const char *). */
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# define MNT_IGNORE(M) hasmntopt (M, (char *) MNTOPT_IGNORE)
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# else
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# define MNT_IGNORE(M) hasmntopt (M, MNTOPT_IGNORE)
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# endif
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#else
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# define MNT_IGNORE(M) 0
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#endif
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/* Each of the FILE streams in this file is only used in a single thread. */
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#include "unlocked-io.h"
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/* The results of opendir() in this file are not used with dirfd and fchdir,
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therefore save some unnecessary work in fchdir.c. */
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#ifdef GNULIB_defined_opendir
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# undef opendir
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#endif
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#ifdef GNULIB_defined_closedir
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# undef closedir
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#endif
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#define ME_DUMMY_0(Fs_name, Fs_type) \
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(strcmp (Fs_type, "autofs") == 0 \
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|| strcmp (Fs_type, "proc") == 0 \
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|| strcmp (Fs_type, "subfs") == 0 \
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/* for Linux 2.6/3.x */ \
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|| strcmp (Fs_type, "debugfs") == 0 \
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|| strcmp (Fs_type, "devpts") == 0 \
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|| strcmp (Fs_type, "fusectl") == 0 \
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|| strcmp (Fs_type, "fuse.portal") == 0 \
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|| strcmp (Fs_type, "mqueue") == 0 \
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|| strcmp (Fs_type, "rpc_pipefs") == 0 \
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|| strcmp (Fs_type, "sysfs") == 0 \
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/* FreeBSD, Linux 2.4 */ \
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|| strcmp (Fs_type, "devfs") == 0 \
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/* for NetBSD 3.0 */ \
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|| strcmp (Fs_type, "kernfs") == 0 \
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/* for Irix 6.5 */ \
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|| strcmp (Fs_type, "ignore") == 0)
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/* Historically, we have marked as "dummy" any file system of type "none",
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but now that programs like du need to know about bind-mounted directories,
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we grant an exception to any with "bind" in its list of mount options.
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I.e., those are *not* dummy entries. */
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#ifdef MOUNTED_GETMNTENT1
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# define ME_DUMMY(Fs_name, Fs_type, Bind) \
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(ME_DUMMY_0 (Fs_name, Fs_type) \
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|| (strcmp (Fs_type, "none") == 0 && !Bind))
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#else
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# define ME_DUMMY(Fs_name, Fs_type) \
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(ME_DUMMY_0 (Fs_name, Fs_type) || strcmp (Fs_type, "none") == 0)
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#endif
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#ifdef __CYGWIN__
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# include <windows.h>
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/* Don't assume that UNICODE is not defined. */
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# undef GetDriveType
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# define GetDriveType GetDriveTypeA
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# define ME_REMOTE me_remote
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/* All cygwin mount points include ':' or start with '//'; so it
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requires a native Windows call to determine remote disks. */
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static bool
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me_remote (char const *fs_name, _GL_UNUSED char const *fs_type)
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{
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if (fs_name[0] && fs_name[1] == ':')
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{
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char drive[4];
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sprintf (drive, "%c:\\", fs_name[0]);
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switch (GetDriveType (drive))
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{
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case DRIVE_REMOVABLE:
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case DRIVE_FIXED:
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case DRIVE_CDROM:
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case DRIVE_RAMDISK:
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return false;
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}
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}
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return true;
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}
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#endif
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#ifndef ME_REMOTE
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/* A file system is "remote" if its Fs_name contains a ':'
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or if (it is of type (smbfs or cifs) and its Fs_name starts with '//')
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or if it is of any other of the listed types
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or Fs_name is equal to "-hosts" (used by autofs to mount remote fs).
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"VM" file systems like prl_fs or vboxsf are not considered remote here. */
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# define ME_REMOTE(Fs_name, Fs_type) \
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(strchr (Fs_name, ':') != NULL \
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|| ((Fs_name)[0] == '/' \
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&& (Fs_name)[1] == '/' \
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&& (strcmp (Fs_type, "smbfs") == 0 \
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|| strcmp (Fs_type, "smb3") == 0 \
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|| strcmp (Fs_type, "cifs") == 0)) \
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|| strcmp (Fs_type, "acfs") == 0 \
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|| strcmp (Fs_type, "afs") == 0 \
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|| strcmp (Fs_type, "coda") == 0 \
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|| strcmp (Fs_type, "auristorfs") == 0 \
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|| strcmp (Fs_type, "fhgfs") == 0 \
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|| strcmp (Fs_type, "gpfs") == 0 \
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|| strcmp (Fs_type, "ibrix") == 0 \
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|| strcmp (Fs_type, "ocfs2") == 0 \
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|| strcmp (Fs_type, "vxfs") == 0 \
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|| strcmp ("-hosts", Fs_name) == 0)
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#endif
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#if MOUNTED_GETMNTINFO /* Mac OS X, FreeBSD, OpenBSD, also (obsolete) 4.4BSD */
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# if ! HAVE_STRUCT_STATFS_F_FSTYPENAME
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static char *
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fstype_to_string (short int t)
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{
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switch (t)
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{
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# ifdef MOUNT_PC
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case MOUNT_PC:
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return "pc";
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# endif
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# ifdef MOUNT_MFS
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case MOUNT_MFS:
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return "mfs";
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# endif
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# ifdef MOUNT_LO
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case MOUNT_LO:
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return "lo";
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# endif
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# ifdef MOUNT_TFS
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case MOUNT_TFS:
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return "tfs";
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# endif
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# ifdef MOUNT_TMP
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case MOUNT_TMP:
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return "tmp";
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# endif
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# ifdef MOUNT_UFS
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case MOUNT_UFS:
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return "ufs" ;
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# endif
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# ifdef MOUNT_NFS
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case MOUNT_NFS:
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return "nfs" ;
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# endif
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# ifdef MOUNT_MSDOS
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case MOUNT_MSDOS:
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return "msdos" ;
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# endif
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# ifdef MOUNT_LFS
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case MOUNT_LFS:
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return "lfs" ;
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# endif
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# ifdef MOUNT_LOFS
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case MOUNT_LOFS:
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return "lofs" ;
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# endif
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# ifdef MOUNT_FDESC
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case MOUNT_FDESC:
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return "fdesc" ;
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# endif
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# ifdef MOUNT_PORTAL
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case MOUNT_PORTAL:
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return "portal" ;
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# endif
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# ifdef MOUNT_NULL
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case MOUNT_NULL:
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return "null" ;
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# endif
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# ifdef MOUNT_UMAP
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case MOUNT_UMAP:
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return "umap" ;
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# endif
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# ifdef MOUNT_KERNFS
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case MOUNT_KERNFS:
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return "kernfs" ;
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# endif
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# ifdef MOUNT_PROCFS
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case MOUNT_PROCFS:
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return "procfs" ;
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# endif
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# ifdef MOUNT_AFS
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case MOUNT_AFS:
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return "afs" ;
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# endif
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# ifdef MOUNT_CD9660
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case MOUNT_CD9660:
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return "cd9660" ;
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# endif
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# ifdef MOUNT_UNION
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case MOUNT_UNION:
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return "union" ;
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# endif
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# ifdef MOUNT_DEVFS
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case MOUNT_DEVFS:
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return "devfs" ;
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# endif
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# ifdef MOUNT_EXT2FS
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case MOUNT_EXT2FS:
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return "ext2fs" ;
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# endif
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default:
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return "?";
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}
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}
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# endif
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static char *
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fsp_to_string (const struct statfs *fsp)
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{
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# if HAVE_STRUCT_STATFS_F_FSTYPENAME
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return (char *) (fsp->f_fstypename);
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# else
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return fstype_to_string (fsp->f_type);
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# endif
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}
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#endif /* MOUNTED_GETMNTINFO */
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#ifdef MOUNTED_VMOUNT /* AIX */
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static char *
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fstype_to_string (int t)
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{
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struct vfs_ent *e;
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e = getvfsbytype (t);
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if (!e || !e->vfsent_name)
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return "none";
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else
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return e->vfsent_name;
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}
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#endif /* MOUNTED_VMOUNT */
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#if defined MOUNTED_GETMNTENT1 || defined MOUNTED_GETMNTENT2
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/* Return the device number from MOUNT_OPTIONS, if possible.
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Otherwise return (dev_t) -1. */
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static dev_t
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dev_from_mount_options (char const *mount_options)
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{
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/* GNU/Linux allows file system implementations to define their own
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meaning for "dev=" mount options, so don't trust the meaning
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here. */
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# ifndef __linux__
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static char const dev_pattern[] = ",dev=";
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char const *devopt = strstr (mount_options, dev_pattern);
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if (devopt)
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{
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char const *optval = devopt + sizeof dev_pattern - 1;
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char *optvalend;
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unsigned long int dev;
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errno = 0;
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dev = strtoul (optval, &optvalend, 16);
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if (optval != optvalend
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&& (*optvalend == '\0' || *optvalend == ',')
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&& ! (dev == ULONG_MAX && errno == ERANGE)
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&& dev == (dev_t) dev)
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return dev;
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}
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# endif
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(void) mount_options;
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return -1;
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}
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#endif
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#if defined MOUNTED_GETMNTENT1 && (defined __linux__ || defined __ANDROID__) /* GNU/Linux, Android */
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/* Unescape the paths in mount tables.
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STR is updated in place. */
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static void
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unescape_tab (char *str)
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{
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size_t i, j = 0;
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size_t len = strlen (str) + 1;
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for (i = 0; i < len; i++)
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{
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if (str[i] == '\\' && (i + 4 < len)
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&& str[i + 1] >= '0' && str[i + 1] <= '3'
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&& str[i + 2] >= '0' && str[i + 2] <= '7'
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&& str[i + 3] >= '0' && str[i + 3] <= '7')
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{
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str[j++] = (str[i + 1] - '0') * 64 +
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(str[i + 2] - '0') * 8 +
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(str[i + 3] - '0');
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i += 3;
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}
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else
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str[j++] = str[i];
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}
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}
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/* Find the next space in STR, terminate the string there in place,
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and return that position. Otherwise return NULL. */
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static char *
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terminate_at_blank (char *str)
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{
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char *s = strchr (str, ' ');
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if (s)
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*s = '\0';
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return s;
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}
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#endif
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/* Return a list of the currently mounted file systems, or NULL on error.
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Add each entry to the tail of the list so that they stay in order.
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If NEED_FS_TYPE is true, ensure that the file system type fields in
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the returned list are valid. Otherwise, they might not be. */
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struct mount_entry *
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read_file_system_list (bool need_fs_type)
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{
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struct mount_entry *mount_list;
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struct mount_entry *me;
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struct mount_entry **mtail = &mount_list;
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(void) need_fs_type;
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#ifdef MOUNTED_GETMNTENT1 /* glibc, HP-UX, IRIX, Cygwin, Android,
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also (obsolete) 4.3BSD, SunOS */
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{
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FILE *fp;
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# if defined __linux__ || defined __ANDROID__
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/* Try parsing mountinfo first, as that make device IDs available.
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Note we could use libmount routines to simplify this parsing a little
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(and that code is in previous versions of this function), however
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libmount depends on libselinux which pulls in many dependencies. */
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char const *mountinfo = "/proc/self/mountinfo";
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fp = fopen (mountinfo, "re");
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if (fp != NULL)
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{
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char *line = NULL;
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size_t buf_size = 0;
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while (getline (&line, &buf_size, fp) != -1)
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{
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unsigned int devmaj, devmin;
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int rc, mntroot_s;
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rc = sscanf(line, "%*u " /* id - discarded */
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"%*u " /* parent - discarded */
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"%u:%u " /* dev major:minor */
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"%n", /* mountroot (start) */
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&devmaj, &devmin,
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&mntroot_s);
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if (rc != 2 && rc != 3) /* 3 if %n included in count. */
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continue;
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/* find end of MNTROOT. */
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char *mntroot = line + mntroot_s;
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char *blank = terminate_at_blank (mntroot);
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if (! blank)
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continue;
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/* find end of TARGET. */
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char *target = blank + 1;
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blank = terminate_at_blank (target);
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if (! blank)
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continue;
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/* skip optional fields, terminated by " - " */
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char *dash = strstr (blank + 1, " - ");
|
|
if (! dash)
|
|
continue;
|
|
|
|
/* advance past the " - " separator. */
|
|
char *fstype = dash + 3;
|
|
blank = terminate_at_blank (fstype);
|
|
if (! blank)
|
|
continue;
|
|
|
|
/* find end of SOURCE. */
|
|
char *source = blank + 1;
|
|
if (! terminate_at_blank (source))
|
|
continue;
|
|
|
|
/* manipulate the sub-strings in place. */
|
|
unescape_tab (source);
|
|
unescape_tab (target);
|
|
unescape_tab (mntroot);
|
|
unescape_tab (fstype);
|
|
|
|
me = xmalloc (sizeof *me);
|
|
|
|
me->me_devname = xstrdup (source);
|
|
me->me_mountdir = xstrdup (target);
|
|
me->me_mntroot = xstrdup (mntroot);
|
|
me->me_type = xstrdup (fstype);
|
|
me->me_type_malloced = 1;
|
|
me->me_dev = makedev (devmaj, devmin);
|
|
/* we pass "false" for the "Bind" option as that's only
|
|
significant when the Fs_type is "none" which will not be
|
|
the case when parsing "/proc/self/mountinfo", and only
|
|
applies for static /etc/mtab files. */
|
|
me->me_dummy = ME_DUMMY (me->me_devname, me->me_type, false);
|
|
me->me_remote = ME_REMOTE (me->me_devname, me->me_type);
|
|
|
|
/* Add to the linked list. */
|
|
*mtail = me;
|
|
mtail = &me->me_next;
|
|
}
|
|
|
|
free (line);
|
|
|
|
if (ferror (fp))
|
|
{
|
|
int saved_errno = errno;
|
|
fclose (fp);
|
|
errno = saved_errno;
|
|
goto free_then_fail;
|
|
}
|
|
|
|
if (fclose (fp) == EOF)
|
|
goto free_then_fail;
|
|
}
|
|
else /* fallback to /proc/self/mounts (/etc/mtab). */
|
|
# endif /* __linux __ || __ANDROID__ */
|
|
{
|
|
struct mntent *mnt;
|
|
char const *table = MOUNTED;
|
|
|
|
fp = setmntent (table, "r");
|
|
if (fp == NULL)
|
|
return NULL;
|
|
|
|
while ((mnt = getmntent (fp)))
|
|
{
|
|
bool bind = hasmntopt (mnt, "bind");
|
|
|
|
me = xmalloc (sizeof *me);
|
|
me->me_devname = xstrdup (mnt->mnt_fsname);
|
|
me->me_mountdir = xstrdup (mnt->mnt_dir);
|
|
me->me_mntroot = NULL;
|
|
me->me_type = xstrdup (mnt->mnt_type);
|
|
me->me_type_malloced = 1;
|
|
me->me_dummy = ME_DUMMY (me->me_devname, me->me_type, bind);
|
|
me->me_remote = ME_REMOTE (me->me_devname, me->me_type);
|
|
me->me_dev = dev_from_mount_options (mnt->mnt_opts);
|
|
|
|
/* 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 /* Mac OS X, FreeBSD, OpenBSD, also (obsolete) 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 = xmalloc (sizeof *me);
|
|
me->me_devname = xstrdup (fsp->f_mntfromname);
|
|
me->me_mountdir = xstrdup (fsp->f_mntonname);
|
|
me->me_mntroot = NULL;
|
|
me->me_type = fs_type;
|
|
me->me_type_malloced = 0;
|
|
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_GETMNTINFO2 /* NetBSD, Minix */
|
|
{
|
|
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_mntroot = NULL;
|
|
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 */
|
|
|
|
#if defined MOUNTED_FS_STAT_DEV /* Haiku, also (obsolete) BeOS */
|
|
{
|
|
/* The next_dev() and fs_stat_dev() system calls give the list of
|
|
all file systems, including the information returned by statvfs()
|
|
(fs type, total blocks, free blocks etc.), but without the mount
|
|
point. But on BeOS all file systems 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 file systems, 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 = xmalloc (sizeof *re);
|
|
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 = xmalloc (sizeof *me);
|
|
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_mntroot = NULL;
|
|
me->me_type = xstrdup (fi.fsh_name);
|
|
me->me_type_malloced = 1;
|
|
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 /* OSF/1, also (obsolete) Apple Darwin 1.3 */
|
|
{
|
|
int numsys, counter;
|
|
size_t bufsize;
|
|
struct statfs *stats;
|
|
|
|
numsys = getfsstat (NULL, 0L, MNT_NOWAIT);
|
|
if (numsys < 0)
|
|
return NULL;
|
|
if (SIZE_MAX / sizeof *stats <= numsys)
|
|
xalloc_die ();
|
|
|
|
bufsize = (1 + numsys) * sizeof *stats;
|
|
stats = xmalloc (bufsize);
|
|
numsys = getfsstat (stats, bufsize, MNT_NOWAIT);
|
|
|
|
if (numsys < 0)
|
|
{
|
|
free (stats);
|
|
return NULL;
|
|
}
|
|
|
|
for (counter = 0; counter < numsys; counter++)
|
|
{
|
|
me = xmalloc (sizeof *me);
|
|
me->me_devname = xstrdup (stats[counter].f_mntfromname);
|
|
me->me_mountdir = xstrdup (stats[counter].f_mntonname);
|
|
me->me_mntroot = NULL;
|
|
me->me_type = xstrdup (FS_TYPE (stats[counter]));
|
|
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;
|
|
}
|
|
|
|
free (stats);
|
|
}
|
|
#endif /* MOUNTED_GETFSSTAT */
|
|
|
|
#if defined MOUNTED_FREAD_FSTYP /* (obsolete) SVR3 */
|
|
{
|
|
struct mnttab mnt;
|
|
char *table = "/etc/mnttab";
|
|
FILE *fp;
|
|
|
|
fp = fopen (table, "re");
|
|
if (fp == NULL)
|
|
return NULL;
|
|
|
|
while (fread (&mnt, sizeof mnt, 1, fp) > 0)
|
|
{
|
|
me = xmalloc (sizeof *me);
|
|
me->me_devname = xstrdup (mnt.mt_dev);
|
|
me->me_mountdir = xstrdup (mnt.mt_filsys);
|
|
me->me_mntroot = NULL;
|
|
me->me_dev = (dev_t) -1; /* Magic; means not known yet. */
|
|
me->me_type = "";
|
|
me->me_type_malloced = 0;
|
|
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);
|
|
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);
|
|
|
|
/* Add to the linked list. */
|
|
*mtail = me;
|
|
mtail = &me->me_next;
|
|
}
|
|
|
|
if (ferror (fp))
|
|
{
|
|
/* The last fread() call must have failed. */
|
|
int saved_errno = errno;
|
|
fclose (fp);
|
|
errno = saved_errno;
|
|
goto free_then_fail;
|
|
}
|
|
|
|
if (fclose (fp) == EOF)
|
|
goto free_then_fail;
|
|
}
|
|
#endif /* MOUNTED_FREAD_FSTYP. */
|
|
|
|
#ifdef MOUNTED_GETEXTMNTENT /* Solaris >= 8 */
|
|
{
|
|
struct extmnttab mnt;
|
|
const char *table = MNTTAB;
|
|
FILE *fp;
|
|
int ret;
|
|
|
|
/* No locking is needed, because the contents of /etc/mnttab is generated
|
|
by the kernel. */
|
|
|
|
errno = 0;
|
|
fp = fopen (table, "re");
|
|
if (fp == NULL)
|
|
ret = errno;
|
|
else
|
|
{
|
|
while ((ret = getextmntent (fp, &mnt, 1)) == 0)
|
|
{
|
|
me = xmalloc (sizeof *me);
|
|
me->me_devname = xstrdup (mnt.mnt_special);
|
|
me->me_mountdir = xstrdup (mnt.mnt_mountp);
|
|
me->me_mntroot = NULL;
|
|
me->me_type = xstrdup (mnt.mnt_fstype);
|
|
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 = makedev (mnt.mnt_major, mnt.mnt_minor);
|
|
|
|
/* Add to the linked list. */
|
|
*mtail = me;
|
|
mtail = &me->me_next;
|
|
}
|
|
|
|
ret = fclose (fp) == EOF ? errno : 0 < ret ? 0 : -1;
|
|
/* Here ret = -1 means success, ret >= 0 means failure. */
|
|
}
|
|
|
|
if (0 <= ret)
|
|
{
|
|
errno = ret;
|
|
goto free_then_fail;
|
|
}
|
|
}
|
|
#endif /* MOUNTED_GETEXTMNTENT */
|
|
|
|
#ifdef MOUNTED_GETMNTENT2 /* Solaris < 8, also (obsolete) SVR4 */
|
|
{
|
|
struct mnttab mnt;
|
|
const 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 | O_CLOEXEC);
|
|
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, "re");
|
|
if (fp == NULL)
|
|
ret = errno;
|
|
else
|
|
{
|
|
while ((ret = getmntent (fp, &mnt)) == 0)
|
|
{
|
|
me = xmalloc (sizeof *me);
|
|
me->me_devname = xstrdup (mnt.mnt_special);
|
|
me->me_mountdir = xstrdup (mnt.mnt_mountp);
|
|
me->me_mntroot = NULL;
|
|
me->me_type = xstrdup (mnt.mnt_fstype);
|
|
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_from_mount_options (mnt.mnt_mntopts);
|
|
|
|
/* Add to the linked list. */
|
|
*mtail = me;
|
|
mtail = &me->me_next;
|
|
}
|
|
|
|
ret = fclose (fp) == EOF ? errno : 0 < ret ? 0 : -1;
|
|
/* Here ret = -1 means success, ret >= 0 means failure. */
|
|
}
|
|
|
|
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;
|
|
void *entries;
|
|
char *thisent;
|
|
struct vmount *vmp;
|
|
int n_entries;
|
|
int i;
|
|
|
|
/* Ask how many bytes to allocate for the mounted file system info. */
|
|
entries = &bufsize;
|
|
if (mntctl (MCTL_QUERY, sizeof bufsize, entries) != 0)
|
|
return NULL;
|
|
entries = xmalloc (bufsize);
|
|
|
|
/* Get the list of mounted file systems. */
|
|
n_entries = mntctl (MCTL_QUERY, bufsize, entries);
|
|
if (n_entries < 0)
|
|
{
|
|
free (entries);
|
|
return NULL;
|
|
}
|
|
|
|
for (i = 0, thisent = entries;
|
|
i < n_entries;
|
|
i++, thisent += vmp->vmt_length)
|
|
{
|
|
char *options, *ignore;
|
|
|
|
vmp = (struct vmount *) thisent;
|
|
me = xmalloc (sizeof *me);
|
|
if (vmp->vmt_flags & MNT_REMOTE)
|
|
{
|
|
char *host, *dir;
|
|
|
|
me->me_remote = 1;
|
|
/* Prepend the remote dirname. */
|
|
host = thisent + vmp->vmt_data[VMT_HOSTNAME].vmt_off;
|
|
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, dir);
|
|
}
|
|
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_mntroot = NULL;
|
|
me->me_type = xstrdup (fstype_to_string (vmp->vmt_gfstype));
|
|
me->me_type_malloced = 1;
|
|
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. */
|
|
|
|
#ifdef MOUNTED_INTERIX_STATVFS /* Interix */
|
|
{
|
|
DIR *dirp = opendir ("/dev/fs");
|
|
char node[9 + NAME_MAX];
|
|
|
|
if (!dirp)
|
|
goto free_then_fail;
|
|
|
|
while (1)
|
|
{
|
|
struct statvfs dev;
|
|
struct dirent entry;
|
|
struct dirent *result;
|
|
|
|
/* FIXME: readdir_r is planned to be withdrawn from POSIX and
|
|
marked obsolescent in glibc. Use readdir instead. */
|
|
if (readdir_r (dirp, &entry, &result) || result == NULL)
|
|
break;
|
|
|
|
strcpy (node, "/dev/fs/");
|
|
strcat (node, entry.d_name);
|
|
|
|
if (statvfs (node, &dev) == 0)
|
|
{
|
|
me = xmalloc (sizeof *me);
|
|
me->me_devname = xstrdup (dev.f_mntfromname);
|
|
me->me_mountdir = xstrdup (dev.f_mntonname);
|
|
me->me_mntroot = NULL;
|
|
me->me_type = xstrdup (dev.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;
|
|
}
|
|
}
|
|
closedir (dirp);
|
|
}
|
|
#endif /* MOUNTED_INTERIX_STATVFS */
|
|
|
|
*mtail = NULL;
|
|
return mount_list;
|
|
|
|
|
|
free_then_fail: _GL_UNUSED_LABEL;
|
|
{
|
|
int saved_errno = errno;
|
|
*mtail = NULL;
|
|
|
|
while (mount_list)
|
|
{
|
|
me = mount_list->me_next;
|
|
free_mount_entry (mount_list);
|
|
mount_list = me;
|
|
}
|
|
|
|
errno = saved_errno;
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/* Free a mount entry as returned from read_file_system_list (). */
|
|
|
|
void
|
|
free_mount_entry (struct mount_entry *me)
|
|
{
|
|
free (me->me_devname);
|
|
free (me->me_mountdir);
|
|
free (me->me_mntroot);
|
|
if (me->me_type_malloced)
|
|
free (me->me_type);
|
|
free (me);
|
|
}
|