diff options
Diffstat (limited to 'lib/mountlist.c')
-rw-r--r-- | lib/mountlist.c | 788 |
1 files changed, 788 insertions, 0 deletions
diff --git a/lib/mountlist.c b/lib/mountlist.c new file mode 100644 index 00000000..b667c443 --- /dev/null +++ b/lib/mountlist.c @@ -0,0 +1,788 @@ +/* mountlist.c -- return a list of mounted filesystems + Copyright (C) 1991, 1992, 1997-2000 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. */ + +#include "../plugins/config.h" + +#include <stdio.h> +#include <sys/types.h> +#include "mountlist.h" + +#ifdef STDC_HEADERS +# include <stdlib.h> +#else +void free (); +#endif +#if defined(STDC_HEADERS) || defined(HAVE_STRING_H) +# include <string.h> +#else +# include <strings.h> +#endif + +#ifndef strstr +char *strstr (); +#endif +char *xmalloc (); +char *xrealloc (); +char *xstrdup (); + +#include <errno.h> +#ifndef errno +extern int errno; +#endif + +#ifdef HAVE_FCNTL_H +# include <fcntl.h> +#endif + +#ifdef HAVE_UNISTD_H +# include <unistd.h> +#endif + +#if HAVE_SYS_PARAM_H +# include <sys/param.h> +#endif + +#if defined (MOUNTED_GETFSSTAT) /* __alpha running OSF_1 */ +# include <sys/mount.h> +# include <sys/fs_types.h> +#endif /* MOUNTED_GETFSSTAT */ + +#ifdef MOUNTED_GETMNTENT1 /* 4.3BSD, SunOS, HP-UX, Dynix, Irix. */ +# include <mntent.h> +# if !defined(MOUNTED) +# if defined(MNT_MNTTAB) /* HP-UX. */ +# define MOUNTED MNT_MNTTAB +# endif +# if defined(MNTTABNAME) /* Dynix. */ +# define MOUNTED MNTTABNAME +# endif +# endif +#endif + +#ifdef MOUNTED_GETMNTINFO /* 4.4BSD. */ +# include <sys/mount.h> +#endif + +#ifdef MOUNTED_GETMNT /* Ultrix. */ +# include <sys/mount.h> +# include <sys/fs_types.h> +#endif + +#ifdef MOUNTED_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 + +#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 = mnt_names[stats[counter].f_type]; + me->me_dummy = ME_DUMMY (me->me_devname, me->me_type); + me->me_remote = ME_REMOTE (me->me_devname, me->me_type); + me->me_dev = (dev_t) -1; /* Magic; means not known yet. */ + + /* Add to the linked list. */ + *mtail = me; + mtail = &me->me_next; + } + + free (stats); + } +#endif /* MOUNTED_GETFSSTAT */ + +#if defined (MOUNTED_FREAD) || defined (MOUNTED_FREAD_FSTYP) /* SVR[23]. */ + { + struct mnttab mnt; + char *table = "/etc/mnttab"; + FILE *fp; + + fp = fopen (table, "r"); + if (fp == NULL) + return NULL; + + while (fread (&mnt, sizeof mnt, 1, fp) > 0) + { + me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry)); +# ifdef GETFSTYP /* SVR3. */ + me->me_devname = xstrdup (mnt.mt_dev); +# else + me->me_devname = xmalloc (strlen (mnt.mt_dev) + 6); + strcpy (me->me_devname, "/dev/"); + strcpy (me->me_devname + 5, mnt.mt_dev); +# endif + me->me_mountdir = xstrdup (mnt.mt_filsys); + me->me_dev = (dev_t) -1; /* Magic; means not known yet. */ + me->me_type = ""; +# ifdef GETFSTYP /* SVR3. */ + if (need_fs_type) + { + struct statfs fsd; + char typebuf[FSTYPSZ]; + + if (statfs (me->me_mountdir, &fsd, sizeof fsd, 0) != -1 + && sysfs (GETFSTYP, fsd.f_fstyp, typebuf) != -1) + me->me_type = xstrdup (typebuf); + } +# endif + me->me_dummy = ME_DUMMY (me->me_devname, me->me_type); + me->me_remote = ME_REMOTE (me->me_devname, me->me_type); + + /* Add to the linked list. */ + *mtail = me; + mtail = &me->me_next; + } + + if (ferror (fp)) + { + int saved_errno = errno; + fclose (fp); + errno = saved_errno; + goto free_then_fail; + } + + if (fclose (fp) == EOF) + goto free_then_fail; + } +#endif /* MOUNTED_FREAD || MOUNTED_FREAD_FSTYP. */ + +#ifdef MOUNTED_GETMNTTBL /* DolphinOS goes it's own way */ + { + struct mntent **mnttbl=getmnttbl(),**ent; + for (ent=mnttbl;*ent;ent++) + { + me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry)); + me->me_devname = xstrdup ( (*ent)->mt_resource); + me->me_mountdir = xstrdup( (*ent)->mt_directory); + me->me_type = xstrdup ((*ent)->mt_fstype); + me->me_dummy = ME_DUMMY (me->me_devname, me->me_type); + me->me_remote = ME_REMOTE (me->me_devname, me->me_type); + me->me_dev = (dev_t) -1; /* Magic; means not known yet. */ + + /* Add to the linked list. */ + *mtail = me; + mtail = &me->me_next; + } + endmnttbl(); + } +#endif + +#ifdef MOUNTED_GETMNTENT2 /* SVR4. */ + { + struct mnttab mnt; + char *table = MNTTAB; + FILE *fp; + int ret; + int lockfd = -1; + +# if defined F_RDLCK && defined F_SETLKW + /* MNTTAB_LOCK is a macro name of our own invention; it's not present in + e.g. Solaris 2.6. If the SVR4 folks ever define a macro + for this file name, we should use their macro name instead. + (Why not just lock MNTTAB directly? We don't know.) */ +# ifndef MNTTAB_LOCK +# define MNTTAB_LOCK "/etc/.mnttab.lock" +# endif + lockfd = open (MNTTAB_LOCK, O_RDONLY); + if (0 <= lockfd) + { + struct flock flock; + flock.l_type = F_RDLCK; + flock.l_whence = SEEK_SET; + flock.l_start = 0; + flock.l_len = 0; + while (fcntl (lockfd, F_SETLKW, &flock) == -1) + if (errno != EINTR) + { + int saved_errno = errno; + close (lockfd); + errno = saved_errno; + return NULL; + } + } + else if (errno != ENOENT) + return NULL; +# endif + + errno = 0; + fp = fopen (table, "r"); + if (fp == NULL) + ret = errno; + else + { + while ((ret = getmntent (fp, &mnt)) == 0) + { + me = (struct mount_entry *) xmalloc (sizeof (struct mount_entry)); + me->me_devname = xstrdup (mnt.mnt_special); + me->me_mountdir = xstrdup (mnt.mnt_mountp); + me->me_type = xstrdup (mnt.mnt_fstype); + me->me_dummy = MNT_IGNORE (&mnt) != 0; + me->me_remote = ME_REMOTE (me->me_devname, me->me_type); + me->me_dev = (dev_t) -1; /* Magic; means not known yet. */ + + /* Add to the linked list. */ + *mtail = me; + mtail = &me->me_next; + } + + ret = fclose (fp) == EOF ? errno : 0 < ret ? 0 : -1; + } + + if (0 <= lockfd && close (lockfd) != 0) + ret = errno; + + if (0 <= ret) + { + errno = ret; + goto free_then_fail; + } + } +#endif /* MOUNTED_GETMNTENT2. */ + +#ifdef MOUNTED_VMOUNT /* AIX. */ + { + int bufsize; + char *entries, *thisent; + struct vmount *vmp; + + /* Ask how many bytes to allocate for the mounted filesystem info. */ + mntctl (MCTL_QUERY, sizeof bufsize, (struct vmount *) &bufsize); + entries = xmalloc (bufsize); + + /* Get the list of mounted filesystems. */ + mntctl (MCTL_QUERY, bufsize, (struct vmount *) entries); + + for (thisent = entries; thisent < entries + bufsize; + thisent += vmp->vmt_length) + { + 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; + } +} |