summaryrefslogtreecommitdiffstats
path: root/lib/mountlist.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/mountlist.c')
-rw-r--r--lib/mountlist.c1120
1 files changed, 1120 insertions, 0 deletions
diff --git a/lib/mountlist.c b/lib/mountlist.c
new file mode 100644
index 0000000..fac5c45
--- /dev/null
+++ b/lib/mountlist.c
@@ -0,0 +1,1120 @@
+/* mountlist.c -- return a list of mounted file systems
+
+ Copyright (C) 1991-1992, 1997-2022 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 3 of the License, 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, see <https://www.gnu.org/licenses/>. */
+
+#include <config.h>
+
+#include "mountlist.h"
+
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+
+#include "xalloc.h"
+
+#include <errno.h>
+
+#include <fcntl.h>
+
+#include <unistd.h>
+
+#if HAVE_SYS_PARAM_H
+# include <sys/param.h>
+#endif
+
+#if MAJOR_IN_MKDEV
+# include <sys/mkdev.h>
+#elif MAJOR_IN_SYSMACROS
+# include <sys/sysmacros.h>
+#endif
+
+#if defined MOUNTED_GETFSSTAT /* OSF/1, also (obsolete) Apple Darwin 1.3 */
+# if HAVE_SYS_UCRED_H
+# include <grp.h> /* needed on OSF V4.0 for definition of NGROUPS,
+ NGROUPS is used as an array dimension in 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 /* glibc, HP-UX, IRIX, Cygwin, Android,
+ also (obsolete) 4.3BSD, SunOS */
+# include <mntent.h>
+# include <sys/types.h>
+# if defined __ANDROID__ /* Android */
+ /* Bionic versions from between 2014-01-09 and 2015-01-08 define MOUNTED to
+ an incorrect value; older Bionic versions don't define it at all. */
+# undef MOUNTED
+# define MOUNTED "/proc/mounts"
+# elif !defined MOUNTED
+# if defined _PATH_MOUNTED /* GNU libc */
+# define MOUNTED _PATH_MOUNTED
+# endif
+# if defined MNT_MNTTAB /* HP-UX. */
+# define MOUNTED MNT_MNTTAB
+# endif
+# endif
+#endif
+
+#ifdef MOUNTED_GETMNTINFO /* Mac OS X, FreeBSD, OpenBSD, also (obsolete) 4.4BSD */
+# include <sys/mount.h>
+#endif
+
+#ifdef MOUNTED_GETMNTINFO2 /* NetBSD, Minix */
+# include <sys/statvfs.h>
+#endif
+
+#ifdef MOUNTED_FS_STAT_DEV /* Haiku, also (obsolete) BeOS */
+# include <fs_info.h>
+# include <dirent.h>
+#endif
+
+#ifdef MOUNTED_FREAD_FSTYP /* (obsolete) SVR3 */
+# include <mnttab.h>
+# include <sys/fstyp.h>
+# include <sys/statfs.h>
+#endif
+
+#ifdef MOUNTED_GETEXTMNTENT /* Solaris >= 8 */
+# include <sys/mnttab.h>
+#endif
+
+#ifdef MOUNTED_GETMNTENT2 /* Solaris < 8, also (obsolete) SVR4 */
+# include <sys/mnttab.h>
+#endif
+
+#ifdef MOUNTED_VMOUNT /* AIX */
+# include <fshelp.h>
+# include <sys/vfs.h>
+#endif
+
+#ifdef MOUNTED_INTERIX_STATVFS /* Interix */
+# include <sys/statvfs.h>
+# include <dirent.h>
+#endif
+
+#if HAVE_SYS_MNTENT_H
+/* This is to get MNTOPT_IGNORE on e.g. SVR4. */
+# include <sys/mntent.h>
+#endif
+
+#ifdef MOUNTED_GETMNTENT1
+# if !HAVE_SETMNTENT /* Android <= 4.4 */
+# define setmntent(fp,mode) fopen (fp, mode "e")
+# endif
+# if !HAVE_ENDMNTENT /* Android <= 4.4 */
+# define endmntent(fp) fclose (fp)
+# endif
+#endif
+
+#ifndef HAVE_HASMNTOPT
+# define hasmntopt(mnt, opt) ((char *) 0)
+#endif
+
+#undef MNT_IGNORE
+#ifdef MNTOPT_IGNORE
+# if defined __sun && defined __SVR4
+/* Solaris defines hasmntopt(struct mnttab *, char *)
+ while it is otherwise hasmntopt(struct mnttab *, const char *). */
+# define MNT_IGNORE(M) hasmntopt (M, (char *) MNTOPT_IGNORE)
+# else
+# define MNT_IGNORE(M) hasmntopt (M, MNTOPT_IGNORE)
+# endif
+#else
+# define MNT_IGNORE(M) 0
+#endif
+
+/* Each of the FILE streams in this file is only used in a single thread. */
+#include "unlocked-io.h"
+
+/* The results of opendir() in this file are not used with dirfd and fchdir,
+ therefore save some unnecessary work in fchdir.c. */
+#ifdef GNULIB_defined_opendir
+# undef opendir
+#endif
+#ifdef GNULIB_defined_closedir
+# undef closedir
+#endif
+
+#define ME_DUMMY_0(Fs_name, Fs_type) \
+ (strcmp (Fs_type, "autofs") == 0 \
+ || strcmp (Fs_type, "proc") == 0 \
+ || strcmp (Fs_type, "subfs") == 0 \
+ /* for Linux 2.6/3.x */ \
+ || strcmp (Fs_type, "debugfs") == 0 \
+ || strcmp (Fs_type, "devpts") == 0 \
+ || strcmp (Fs_type, "fusectl") == 0 \
+ || strcmp (Fs_type, "fuse.portal") == 0 \
+ || strcmp (Fs_type, "mqueue") == 0 \
+ || strcmp (Fs_type, "rpc_pipefs") == 0 \
+ || strcmp (Fs_type, "sysfs") == 0 \
+ /* FreeBSD, Linux 2.4 */ \
+ || strcmp (Fs_type, "devfs") == 0 \
+ /* for NetBSD 3.0 */ \
+ || strcmp (Fs_type, "kernfs") == 0 \
+ /* for Irix 6.5 */ \
+ || strcmp (Fs_type, "ignore") == 0)
+
+/* Historically, we have marked as "dummy" any file system of type "none",
+ but now that programs like du need to know about bind-mounted directories,
+ we grant an exception to any with "bind" in its list of mount options.
+ I.e., those are *not* dummy entries. */
+#ifdef MOUNTED_GETMNTENT1
+# define ME_DUMMY(Fs_name, Fs_type, Bind) \
+ (ME_DUMMY_0 (Fs_name, Fs_type) \
+ || (strcmp (Fs_type, "none") == 0 && !Bind))
+#else
+# define ME_DUMMY(Fs_name, Fs_type) \
+ (ME_DUMMY_0 (Fs_name, Fs_type) || strcmp (Fs_type, "none") == 0)
+#endif
+
+#ifdef __CYGWIN__
+# include <windows.h>
+/* Don't assume that UNICODE is not defined. */
+# undef GetDriveType
+# define GetDriveType GetDriveTypeA
+# define ME_REMOTE me_remote
+/* All cygwin mount points include ':' or start with '//'; so it
+ requires a native Windows call to determine remote disks. */
+static bool
+me_remote (char const *fs_name, _GL_UNUSED char const *fs_type)
+{
+ if (fs_name[0] && fs_name[1] == ':')
+ {
+ char drive[4];
+ sprintf (drive, "%c:\\", fs_name[0]);
+ switch (GetDriveType (drive))
+ {
+ case DRIVE_REMOVABLE:
+ case DRIVE_FIXED:
+ case DRIVE_CDROM:
+ case DRIVE_RAMDISK:
+ return false;
+ }
+ }
+ return true;
+}
+#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 '//')
+ or if it is of any other of the listed types
+ or Fs_name is equal to "-hosts" (used by autofs to mount remote fs).
+ "VM" file systems like prl_fs or vboxsf are not considered remote here. */
+# 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, "smb3") == 0 \
+ || strcmp (Fs_type, "cifs") == 0)) \
+ || strcmp (Fs_type, "acfs") == 0 \
+ || strcmp (Fs_type, "afs") == 0 \
+ || strcmp (Fs_type, "coda") == 0 \
+ || strcmp (Fs_type, "auristorfs") == 0 \
+ || strcmp (Fs_type, "fhgfs") == 0 \
+ || strcmp (Fs_type, "gpfs") == 0 \
+ || strcmp (Fs_type, "ibrix") == 0 \
+ || strcmp (Fs_type, "ocfs2") == 0 \
+ || strcmp (Fs_type, "vxfs") == 0 \
+ || strcmp ("-hosts", Fs_name) == 0)
+#endif
+
+#if MOUNTED_GETMNTINFO /* Mac OS X, FreeBSD, OpenBSD, also (obsolete) 4.4BSD */
+
+# if ! HAVE_STRUCT_STATFS_F_FSTYPENAME
+static char *
+fstype_to_string (short int 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
+
+static char *
+fsp_to_string (const struct statfs *fsp)
+{
+# if HAVE_STRUCT_STATFS_F_FSTYPENAME
+ 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 */
+
+
+#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
+ (void) mount_options;
+ return -1;
+}
+
+#endif
+
+#if defined MOUNTED_GETMNTENT1 && (defined __linux__ || defined __ANDROID__) /* GNU/Linux, Android */
+
+/* Unescape the paths in mount tables.
+ STR is updated in place. */
+
+static void
+unescape_tab (char *str)
+{
+ size_t i, j = 0;
+ size_t len = strlen (str) + 1;
+ for (i = 0; i < len; i++)
+ {
+ if (str[i] == '\\' && (i + 4 < len)
+ && str[i + 1] >= '0' && str[i + 1] <= '3'
+ && str[i + 2] >= '0' && str[i + 2] <= '7'
+ && str[i + 3] >= '0' && str[i + 3] <= '7')
+ {
+ str[j++] = (str[i + 1] - '0') * 64 +
+ (str[i + 2] - '0') * 8 +
+ (str[i + 3] - '0');
+ i += 3;
+ }
+ else
+ str[j++] = str[i];
+ }
+}
+
+/* Find the next space in STR, terminate the string there in place,
+ and return that position. Otherwise return NULL. */
+
+static char *
+terminate_at_blank (char *str)
+{
+ char *s = strchr (str, ' ');
+ if (s)
+ *s = '\0';
+ return s;
+}
+#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
+ the returned list are valid. Otherwise, they might not be. */
+
+struct mount_entry *
+read_file_system_list (bool need_fs_type)
+{
+ struct mount_entry *mount_list;
+ struct mount_entry *me;
+ struct mount_entry **mtail = &mount_list;
+ (void) need_fs_type;
+
+#ifdef MOUNTED_GETMNTENT1 /* glibc, HP-UX, IRIX, Cygwin, Android,
+ also (obsolete) 4.3BSD, SunOS */
+ {
+ FILE *fp;
+
+# if defined __linux__ || defined __ANDROID__
+ /* Try parsing mountinfo first, as that make device IDs available.
+ Note we could use libmount routines to simplify this parsing a little
+ (and that code is in previous versions of this function), however
+ libmount depends on libselinux which pulls in many dependencies. */
+ char const *mountinfo = "/proc/self/mountinfo";
+ fp = fopen (mountinfo, "re");
+ if (fp != NULL)
+ {
+ char *line = NULL;
+ size_t buf_size = 0;
+
+ while (getline (&line, &buf_size, fp) != -1)
+ {
+ unsigned int devmaj, devmin;
+ int rc, mntroot_s;
+
+ rc = sscanf(line, "%*u " /* id - discarded */
+ "%*u " /* parent - discarded */
+ "%u:%u " /* dev major:minor */
+ "%n", /* mountroot (start) */
+ &devmaj, &devmin,
+ &mntroot_s);
+
+ if (rc != 2 && rc != 3) /* 3 if %n included in count. */
+ continue;
+
+ /* find end of MNTROOT. */
+ char *mntroot = line + mntroot_s;
+ char *blank = terminate_at_blank (mntroot);
+ if (! blank)
+ continue;
+
+ /* find end of TARGET. */
+ char *target = blank + 1;
+ blank = terminate_at_blank (target);
+ if (! blank)
+ continue;
+
+ /* skip optional fields, terminated by " - " */
+ 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);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-16 09:17:10 +0000