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authorCy Schubert <cy@FreeBSD.org>2016-08-31 00:08:49 +0000
committerCy Schubert <cy@FreeBSD.org>2016-08-31 00:08:49 +0000
commitca57057f598bfc7119f79f71bf38ec88244ab396 (patch)
tree051f78ef258707b493cc7cb21569b6949915f6c7 /conf/mtab
parente66b16bf080ead1c51f321eaf56710c771778706 (diff)
downloadsrc-ca57057f598bfc7119f79f71bf38ec88244ab396.tar.gz
src-ca57057f598bfc7119f79f71bf38ec88244ab396.zip
Import am-utils 6.2,vendor/amd/6.2vendor/amd
Suggested by: pfg@ Obtained from: ftp://ftp.am-utils.org/pub/am-utils/
Notes
Notes: svn path=/vendor/amd/dist/; revision=305100 svn path=/vendor/amd/6.2/; revision=305101; tag=vendor/amd/6.2
Diffstat (limited to 'conf/mtab')
-rw-r--r--conf/mtab/mtab_aix.c178
-rw-r--r--conf/mtab/mtab_bsd.c21
-rw-r--r--conf/mtab/mtab_file.c454
-rw-r--r--conf/mtab/mtab_isc3.c269
-rw-r--r--conf/mtab/mtab_linux.c565
-rw-r--r--conf/mtab/mtab_mach3.c501
-rw-r--r--conf/mtab/mtab_osf.c146
-rw-r--r--conf/mtab/mtab_svr4.c302
-rw-r--r--conf/mtab/mtab_ultrix.c119
9 files changed, 2544 insertions, 11 deletions
diff --git a/conf/mtab/mtab_aix.c b/conf/mtab/mtab_aix.c
new file mode 100644
index 000000000000..072adc74151d
--- /dev/null
+++ b/conf/mtab/mtab_aix.c
@@ -0,0 +1,178 @@
+/*
+ * Copyright (c) 1997-2014 Erez Zadok
+ * Copyright (c) 1990 Jan-Simon Pendry
+ * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Jan-Simon Pendry at Imperial College, London.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *
+ * File: am-utils/conf/mtab/mtab_aix.c
+ *
+ */
+
+/*
+ * AIX systems don't write their mount tables on a file. Instead, they
+ * use a (better) system where the kernel keeps this state, and you access
+ * the mount tables via a known interface.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif /* HAVE_CONFIG_H */
+#include <am_defs.h>
+#include <amu.h>
+
+/*
+ * These were missing external definitions from old AIX's headers. They
+ * appear to be available in <sys/vmount.h> on AIX 5.3, and possibly
+ * earlier. Hence I commented this out.
+ */
+#ifndef HAVE_EXTERN_MNTCTL
+extern int mntctl(int cmd, int size, voidp buf);
+#endif /* not HAVE_EXTERN_MNTCTL */
+
+
+static mntent_t *
+mnt_dup(struct vmount *mp)
+{
+ mntent_t *new_mp = ALLOC(mntent_t);
+ char *ty;
+ char *fsname = xstrdup(vmt2dataptr(mp, VMT_OBJECT));
+
+ new_mp->mnt_dir = strdup(vmt2dataptr(mp, VMT_STUB));
+ new_mp->mnt_opts = strdup(vmt2dataptr(mp, VMT_ARGS));
+
+ switch (mp->vmt_gfstype) {
+
+ case MOUNT_TYPE_UFS:
+ ty = MNTTAB_TYPE_UFS;
+ new_mp->mnt_fsname = xstrdup(fsname);
+ break;
+
+ case MOUNT_TYPE_NFS:
+ ty = MNTTAB_TYPE_NFS;
+ new_mp->mnt_fsname = str3cat((char *) NULL,
+ vmt2dataptr(mp, VMT_HOSTNAME), ":",
+ fsname);
+ break;
+
+#ifdef HAVE_FS_NFS3
+ case MOUNT_TYPE_NFS3:
+ ty = MNTTAB_TYPE_NFS3;
+ new_mp->mnt_fsname = str3cat((char *) NULL,
+ vmt2dataptr(mp, VMT_HOSTNAME), ":",
+ fsname);
+ break;
+#endif /* HAVE_FS_NFS3 */
+
+ default:
+ ty = "unknown";
+ new_mp->mnt_fsname = xstrdup(fsname);
+ break;
+
+ }
+
+ new_mp->mnt_type = xstrdup(ty);
+ /* store the VFS ID for uvmount() */
+ new_mp->mnt_passno = mp->vmt_vfsnumber;
+ new_mp->mnt_freq = 0;
+
+ XFREE(fsname);
+
+ return new_mp;
+}
+
+
+/*
+ * Read a mount table into memory
+ */
+mntlist *
+read_mtab(char *fs, const char *mnttabname)
+{
+ mntlist **mpp, *mhp;
+ int i;
+ char *mntinfo = NULL, *cp;
+ struct vmount *vp;
+ int ret;
+ int maxtry = 10; /* maximum number of times to try mntctl */
+
+ /*
+ * Figure out size of mount table and allocate space for a copy. Then get
+ * mount table for real. We repeat this loop at most 10 times to minimze
+ * the chance of a race condition (something gets un/mounted in between
+ * calls to mntctl()
+ */
+ i = sizeof(int);
+ do {
+ if (mntinfo)
+ XFREE(mntinfo);
+ mntinfo = xmalloc(i);
+ ret = mntctl(MCTL_QUERY, i, mntinfo);
+ if (ret == 0)
+ i = *(int*) mntinfo;
+ if (--maxtry <= 0) {
+ plog(XLOG_ERROR, "mntctl: could not get a stable result");
+ ret = -1;
+ errno = EINVAL;
+ break;
+ }
+ } while (ret == 0);
+ if (ret < 0) {
+ plog(XLOG_ERROR, "mntctl: %m");
+ goto out;
+ }
+
+ mpp = &mhp;
+ for (i = 0, cp = mntinfo; i < ret; i++, cp += vp->vmt_length) {
+ vp = (struct vmount *) cp;
+
+ /*
+ * Allocate a new slot
+ */
+ *mpp = ALLOC(struct mntlist);
+
+ /*
+ * Copy the data returned by mntctl
+ */
+ (*mpp)->mnt = mnt_dup(vp);
+
+ /*
+ * Move to next pointer
+ */
+ mpp = &(*mpp)->mnext;
+ }
+
+ *mpp = NULL;
+
+out:
+ if (mntinfo)
+ XFREE(mntinfo);
+ return mhp;
+}
diff --git a/conf/mtab/mtab_bsd.c b/conf/mtab/mtab_bsd.c
index fe3991aa575d..203a265e13af 100644
--- a/conf/mtab/mtab_bsd.c
+++ b/conf/mtab/mtab_bsd.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 1997-2006 Erez Zadok
+ * Copyright (c) 1997-2014 Erez Zadok
* Copyright (c) 1990 Jan-Simon Pendry
* Copyright (c) 1990 Imperial College of Science, Technology & Medicine
* Copyright (c) 1990 The Regents of the University of California.
@@ -16,11 +16,7 @@
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgment:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
+ * 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
@@ -53,6 +49,9 @@
#include <am_defs.h>
#include <amu.h>
+#if __NetBSD_Version__ > 200030000
+#define statfs statvfs
+#endif
static mntent_t *
mnt_dup(struct statfs *mp)
@@ -60,8 +59,8 @@ mnt_dup(struct statfs *mp)
mntent_t *new_mp = ALLOC(mntent_t);
char *ty;
- new_mp->mnt_fsname = strdup(mp->f_mntfromname);
- new_mp->mnt_dir = strdup(mp->f_mntonname);
+ new_mp->mnt_fsname = xstrdup(mp->f_mntfromname);
+ new_mp->mnt_dir = xstrdup(mp->f_mntonname);
#ifdef HAVE_STRUCT_STATFS_F_FSTYPENAME
ty = mp->f_fstypename;
@@ -93,8 +92,8 @@ mnt_dup(struct statfs *mp)
}
#endif /* not HAVE_STRUCT_STATFS_F_FSTYPENAME */
- new_mp->mnt_type = strdup(ty);
- new_mp->mnt_opts = strdup("unset");
+ new_mp->mnt_type = xstrdup(ty);
+ new_mp->mnt_opts = xstrdup("unset");
new_mp->mnt_freq = 0;
new_mp->mnt_passno = 0;
@@ -138,7 +137,7 @@ read_mtab(char *fs, const char *mnttabname)
/*
* Terminate the list
*/
- *mpp = 0;
+ *mpp = NULL;
return mhp;
}
diff --git a/conf/mtab/mtab_file.c b/conf/mtab/mtab_file.c
new file mode 100644
index 000000000000..5004ef5f0e68
--- /dev/null
+++ b/conf/mtab/mtab_file.c
@@ -0,0 +1,454 @@
+/*
+ * Copyright (c) 1997-2014 Erez Zadok
+ * Copyright (c) 1990 Jan-Simon Pendry
+ * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Jan-Simon Pendry at Imperial College, London.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *
+ * File: am-utils/conf/mtab/mtab_file.c
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif /* HAVE_CONFIG_H */
+#include <am_defs.h>
+#include <amu.h>
+
+#define NFILE_RETRIES 10 /* number of retries (seconds) */
+
+#ifdef MOUNT_TABLE_ON_FILE
+
+static FILE *mnt_file;
+
+
+/*
+ * If the system is being trashed by something, then
+ * opening mtab may fail with ENFILE. So, go to sleep
+ * for a second and try again. (Yes - this has happened to me.)
+ *
+ * Note that this *may* block the automounter, oh well.
+ * If we get to this state then things are badly wrong anyway...
+ *
+ * Give the system 10 seconds to recover but then give up.
+ * Hopefully something else will exit and free up some file
+ * table slots in that time.
+ */
+# ifdef HAVE_FLOCK
+# define lock(fd) (flock((fd), LOCK_EX))
+# else /* not HAVE_FLOCK */
+static int
+lock(int fd)
+{
+ int rc;
+ struct flock lk;
+
+ lk.l_type = F_WRLCK;
+ lk.l_whence = 0;
+ lk.l_start = 0;
+ lk.l_len = 0;
+
+again:
+ rc = fcntl(fd, F_SETLKW, (caddr_t) & lk);
+ if (rc < 0 && (errno == EACCES || errno == EAGAIN)) {
+# ifdef DEBUG
+ dlog("Blocked, trying to obtain exclusive mtab lock");
+# endif /* DEBUG */
+ sleep(1);
+ goto again;
+ }
+ return rc;
+}
+# endif /* not HAVE_FLOCK */
+
+
+static FILE *
+open_locked_mtab(const char *mnttabname, char *mode, char *fs)
+{
+ FILE *mfp = NULL;
+
+ /*
+ * There is a possible race condition if two processes enter
+ * this routine at the same time. One will be blocked by the
+ * exclusive lock below (or by the shared lock in setmntent)
+ * and by the time the second process has the exclusive lock
+ * it will be on the wrong underlying object. To check for this
+ * the mtab file is stat'ed before and after all the locking
+ * sequence, and if it is a different file then we assume that
+ * it may be the wrong file (only "may", since there is another
+ * race between the initial stat and the setmntent).
+ *
+ * Simpler solutions to this problem are invited...
+ */
+ int racing = 2;
+ int rc;
+ int retries = 0;
+ struct stat st_before, st_after;
+
+ if (mnt_file) {
+# ifdef DEBUG
+ dlog("Forced close on %s in read_mtab", mnttabname);
+# endif /* DEBUG */
+ endmntent(mnt_file);
+ mnt_file = NULL;
+ }
+again:
+ if (mfp) {
+ endmntent(mfp);
+ mfp = NULL;
+ }
+ if (stat(mnttabname, &st_before) < 0) {
+ plog(XLOG_ERROR, "%s: stat: %m", mnttabname);
+ if (errno == ESTALE) {
+ /* happens occasionally */
+ sleep(1);
+ goto again;
+ }
+ /*
+ * If 'mnttabname' file does not exist give setmntent() a
+ * chance to create it (depending on the mode).
+ * Otherwise, bail out.
+ */
+ else if (errno != ENOENT) {
+ return 0;
+ }
+ }
+
+eacces:
+ mfp = setmntent((char *)mnttabname, mode);
+ if (!mfp) {
+ /*
+ * Since setmntent locks the descriptor, it
+ * is possible it can fail... so retry if
+ * needed.
+ */
+ if (errno == EACCES || errno == EAGAIN) {
+# ifdef DEBUG
+ dlog("Blocked, trying to obtain exclusive mtab lock");
+# endif /* DEBUG */
+ goto eacces;
+ } else if (errno == ENFILE && retries++ < NFILE_RETRIES) {
+ sleep(1);
+ goto eacces;
+ }
+ plog(XLOG_ERROR, "setmntent(\"%s\", \"%s\"): %m", mnttabname, mode);
+ return 0;
+ }
+ /*
+ * At this point we have an exclusive lock on the mount list,
+ * but it may be the wrong one so...
+ */
+
+ /*
+ * Need to get an exclusive lock on the current
+ * mount table until we have a new copy written
+ * out, when the lock is released in free_mntlist.
+ * flock is good enough since the mount table is
+ * not shared between machines.
+ */
+ do
+ rc = lock(fileno(mfp));
+ while (rc < 0 && errno == EINTR);
+ if (rc < 0) {
+ plog(XLOG_ERROR, "Couldn't lock %s: %m", mnttabname);
+ endmntent(mfp);
+ return 0;
+ }
+ /*
+ * Now check whether the mtab file has changed under our feet
+ */
+ if (stat(mnttabname, &st_after) < 0) {
+ plog(XLOG_ERROR, "%s: stat: %m", mnttabname);
+ goto again;
+ }
+ if (st_before.st_dev != st_after.st_dev ||
+ st_before.st_ino != st_after.st_ino) {
+ struct timeval tv;
+ if (racing == 0) {
+ /* Sometimes print a warning */
+ plog(XLOG_WARNING,
+ "Possible mount table race - retrying %s", fs);
+ }
+ racing = (racing + 1) & 3;
+ /*
+ * Take a nap. From: Doug Kingston <dpk@morgan.com>
+ */
+ tv.tv_sec = 0;
+ tv.tv_usec = (am_mypid & 0x07) << 17;
+ if (tv.tv_usec)
+ if (select(0, (voidp) 0, (voidp) 0, (voidp) 0, &tv) < 0)
+ plog(XLOG_WARNING, "mtab nap failed: %m");
+
+ goto again;
+ }
+
+ return mfp;
+}
+
+
+/*
+ * Unlock the mount table
+ */
+void
+unlock_mntlist(void)
+{
+ /*
+ * Release file lock, by closing the file
+ */
+ if (mnt_file) {
+ dlog("unlock_mntlist: releasing");
+ endmntent(mnt_file);
+ mnt_file = NULL;
+ }
+}
+
+
+/*
+ * Write out a mount list
+ */
+void
+rewrite_mtab(mntlist *mp, const char *mnttabname)
+{
+ FILE *mfp;
+ int error = 0;
+
+ /*
+ * Concoct a temporary name in the same directory as the target mount
+ * table so that rename() will work.
+ */
+ char tmpname[64];
+ int retries;
+ int tmpfd;
+ char *cp;
+ char mcp[128];
+
+ xstrlcpy(mcp, mnttabname, sizeof(mcp));
+ cp = strrchr(mcp, '/');
+ if (cp) {
+ memmove(tmpname, mcp, cp - mcp);
+ tmpname[cp - mcp] = '\0';
+ } else {
+ plog(XLOG_WARNING, "No '/' in mtab (%s), using \".\" as tmp directory", mnttabname);
+ tmpname[0] = '.';
+ tmpname[1] = '\0';
+ }
+ xstrlcat(tmpname, "/mtabXXXXXX", sizeof(tmpname));
+ retries = 0;
+enfile1:
+#ifdef HAVE_MKSTEMP
+ tmpfd = mkstemp(tmpname);
+ fchmod(tmpfd, 0644);
+#else /* not HAVE_MKSTEMP */
+ mktemp(tmpname);
+ tmpfd = open(tmpname, O_RDWR | O_CREAT | O_TRUNC, 0644);
+#endif /* not HAVE_MKSTEMP */
+ if (tmpfd < 0) {
+ if (errno == ENFILE && retries++ < NFILE_RETRIES) {
+ sleep(1);
+ goto enfile1;
+ }
+ plog(XLOG_ERROR, "%s: open: %m", tmpname);
+ return;
+ }
+ if (close(tmpfd) < 0)
+ plog(XLOG_ERROR, "Couldn't close tmp file descriptor: %m");
+
+ retries = 0;
+enfile2:
+ mfp = setmntent(tmpname, "w");
+ if (!mfp) {
+ if (errno == ENFILE && retries++ < NFILE_RETRIES) {
+ sleep(1);
+ goto enfile2;
+ }
+ plog(XLOG_ERROR, "setmntent(\"%s\", \"w\"): %m", tmpname);
+ error = 1;
+ goto out;
+ }
+ while (mp) {
+ if (mp->mnt) {
+ if (addmntent(mfp, mp->mnt)) {
+ plog(XLOG_ERROR, "Can't write entry to %s", tmpname);
+ error = 1;
+ goto out;
+ }
+ }
+ mp = mp->mnext;
+ }
+
+ /*
+ * SunOS 4.1 manuals say that the return code from entmntent()
+ * is always 1 and to treat as a void. That means we need to
+ * call fflush() to make sure the new mtab file got written.
+ */
+ if (fflush(mfp)) {
+ plog(XLOG_ERROR, "flush new mtab file: %m");
+ error = 1;
+ goto out;
+ }
+ (void) endmntent(mfp);
+
+ /*
+ * Rename temporary mtab to real mtab
+ */
+ if (rename(tmpname, mnttabname) < 0) {
+ plog(XLOG_ERROR, "rename %s to %s: %m", tmpname, mnttabname);
+ error = 1;
+ goto out;
+ }
+out:
+ if (error)
+ (void) unlink(tmpname);
+}
+
+
+static void
+mtab_stripnl(char *s)
+{
+ do {
+ s = strchr(s, '\n');
+ if (s)
+ *s++ = ' ';
+ } while (s);
+}
+
+
+/*
+ * Append a mntent structure to the
+ * current mount table.
+ */
+void
+write_mntent(mntent_t *mp, const char *mnttabname)
+{
+ int retries = 0;
+ FILE *mfp;
+enfile:
+ mfp = open_locked_mtab(mnttabname, "a", mp->mnt_dir);
+ if (mfp) {
+ mtab_stripnl(mp->mnt_opts);
+ if (addmntent(mfp, mp))
+ plog(XLOG_ERROR, "Couldn't write %s: %m", mnttabname);
+ if (fflush(mfp))
+ plog(XLOG_ERROR, "Couldn't flush %s: %m", mnttabname);
+ (void) endmntent(mfp);
+ } else {
+ if (errno == ENFILE && retries < NFILE_RETRIES) {
+ sleep(1);
+ goto enfile;
+ }
+ plog(XLOG_ERROR, "setmntent(\"%s\", \"a\"): %m", mnttabname);
+ }
+}
+
+#endif /* MOUNT_TABLE_ON_FILE */
+
+
+static mntent_t *
+mnt_dup(mntent_t *mp)
+{
+ mntent_t *new_mp = ALLOC(mntent_t);
+
+ new_mp->mnt_fsname = xstrdup(mp->mnt_fsname);
+ new_mp->mnt_dir = xstrdup(mp->mnt_dir);
+ new_mp->mnt_type = xstrdup(mp->mnt_type);
+ new_mp->mnt_opts = xstrdup(mp->mnt_opts);
+
+ new_mp->mnt_freq = mp->mnt_freq;
+ new_mp->mnt_passno = mp->mnt_passno;
+
+#ifdef HAVE_MNTENT_T_MNT_TIME
+# ifdef HAVE_MNTENT_T_MNT_TIME_STRING
+ new_mp->mnt_time = xstrdup(mp->mnt_time);
+# else /* not HAVE_MNTENT_T_MNT_TIME_STRING */
+ new_mp->mnt_time = mp->mnt_time;
+# endif /* not HAVE_MNTENT_T_MNT_TIME_STRING */
+#endif /* HAVE_MNTENT_T_MNT_TIME */
+
+#ifdef HAVE_MNTENT_T_MNT_CNODE
+ new_mp->mnt_cnode = mp->mnt_cnode;
+#endif /* HAVE_MNTENT_T_MNT_CNODE */
+
+ return new_mp;
+}
+
+
+/*
+ * Read a mount table into memory
+ */
+mntlist *
+read_mtab(char *fs, const char *mnttabname)
+{
+ mntlist **mpp, *mhp;
+
+ mntent_t *mep;
+ FILE *mfp = open_locked_mtab(mnttabname, "r+", fs);
+
+ if (!mfp)
+ return 0;
+
+ mpp = &mhp;
+
+/*
+ * XXX - In SunOS 4 there is (yet another) memory leak
+ * which loses 1K the first time getmntent is called.
+ * (jsp)
+ */
+ while ((mep = getmntent(mfp))) {
+ /*
+ * Allocate a new slot
+ */
+ *mpp = ALLOC(struct mntlist);
+
+ /*
+ * Copy the data returned by getmntent
+ */
+ (*mpp)->mnt = mnt_dup(mep);
+
+ /*
+ * Move to next pointer
+ */
+ mpp = &(*mpp)->mnext;
+ }
+ *mpp = NULL;
+
+#ifdef MOUNT_TABLE_ON_FILE
+ /*
+ * If we are not updating the mount table then we
+ * can free the resources held here, otherwise they
+ * must be held until the mount table update is complete
+ */
+ mnt_file = mfp;
+#else /* not MOUNT_TABLE_ON_FILE */
+ endmntent(mfp);
+#endif /* not MOUNT_TABLE_ON_FILE */
+
+ return mhp;
+}
diff --git a/conf/mtab/mtab_isc3.c b/conf/mtab/mtab_isc3.c
new file mode 100644
index 000000000000..9c8df1bae7d8
--- /dev/null
+++ b/conf/mtab/mtab_isc3.c
@@ -0,0 +1,269 @@
+/*
+ * Copyright (c) 1997-2014 Erez Zadok
+ * Copyright (c) 1990 Jan-Simon Pendry
+ * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Jan-Simon Pendry at Imperial College, London.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *
+ * File: am-utils/conf/mtab/mtab_isc3.c
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif /* HAVE_CONFIG_H */
+#include <am_defs.h>
+#include <amu.h>
+
+/* fd for /etc/.mnt.lock (also act as flag for: is_locked) */
+static int mtlckf = 0;
+static char mtlckname[] = "/etc/.mnt.lock";
+static char mnttabname[] = "/etc/mnttab";
+
+
+static void
+unlockmnttab(void)
+{
+ if (mtlckf) {
+ close(mtlckf);
+ mtlckf = 0;
+ }
+}
+
+
+static
+lockfile(int fd, int type)
+{
+ struct flock lk;
+
+ lk.l_type = type;
+ lk.l_whence = 0;
+ lk.l_start = 0;
+ lk.l_len = 0;
+
+ return fcntl(fd, F_SETLKW, &lk);
+}
+
+
+static
+lockmnttab(void)
+{
+ if (mtlckf == 0) { /* need lock on /etc/.mnt.lock */
+ mtlckf = open(mtlckname, O_RDWR);
+ if (mtlckf >= 0) {
+ if (lockfile(mtlckf, F_WRLCK) < 0) {
+ close(mtlckf);
+ mtlckf = 0;
+#ifdef DEBUG
+ dlog("lock failed %m");
+#endif /* DEBUG */
+ } else {
+ return 0;
+ }
+ }
+ }
+ plog(XLOG_ERROR, "Unable to lock %s: %m", mtlckname);
+ return -1;
+}
+
+
+void
+unlock_mntlist(void)
+{
+ dlog("unlock_mntlist: releasing");
+ unlockmnttab();
+}
+
+
+/* convert from ix386 mnttab to amd mntent */
+static mntent_t *
+mnt_dup(mntent_t *mp)
+{
+ /* note: may not be null terminated */
+ mntent_t *new_mp = ALLOC(mntent_t);
+ char nullcpy[128];
+
+ xstrlcpy(nullcpy, mp->mt_dev, 32);
+ new_mp->mnt_fsname = xstrdup(nullcpy);
+
+ xstrlcpy(nullcpy, mp->mt_filsys, 32);
+ new_mp->mnt_dir = xstrdup(nullcpy);
+
+ xstrlcpy(nullcpy, mp->mt_fstyp, 16);
+ new_mp->mnt_type = xstrdup(nullcpy);
+
+ xstrlcpy(nullcpy, mp->mt_mntopts, 64);
+ new_mp->mnt_opts = xstrdup(nullcpy);
+
+ new_mp->mnt_freq = 0;
+ new_mp->mnt_passno = 0;
+
+ new_mp->mnt_time = mp->mt_time;
+ new_mp->mnt_ro = mp->mt_ro_flg;
+
+ return new_mp;
+}
+
+
+/* convert back (static alloc) */
+static mntent_t *
+mtab_of(mntent_t *mnt)
+{
+ static mntent_t mt;
+
+ xstrlcpy(mt.mt_dev, mnt->mnt_fsname, 32);
+ xstrlcpy(mt.mt_filsys, mnt->mnt_dir, 32);
+
+ mt.mt_ro_flg = mnt->mnt_ro;
+ mt.mt_time = mnt->mnt_time;
+
+ xstrlcpy(mt.mt_fstyp, mnt->mnt_type, 16);
+ xstrlcpy(mt.mt_mntopts, mnt->mnt_opts, 64);
+
+ return &mt;
+}
+
+
+/*
+ * Read a mount table into memory
+ */
+mntlist *
+read_mtab(char *fs, const char *mnttabname)
+{
+ mntlist **mpp, *mhp;
+ /* From: Piete Brooks <pb@cl.cam.ac.uk> */
+ int fd;
+ mntent_t mountbuffer[NMOUNT], *fs_data;
+ int ret;
+ int nmts;
+
+ if (lockmnttab() != 0)
+ return (mntlist *) NULL;
+
+ fd = open(mnttabname, O_RDONLY);
+ if (fd < 0) {
+ plog(XLOG_ERROR, "Can't open %s: %m", mnttabname);
+ return (mntlist *) NULL;
+ }
+ mpp = &mhp;
+ while ((ret = read(fd, (char *) mountbuffer, NMOUNT * sizeof(mntent_t))) > 0) {
+ nmts = ret / sizeof(mntent_t);
+ for (fs_data = mountbuffer; fs_data < &mountbuffer[nmts]; fs_data++) {
+ /*
+ * Allocate a new slot
+ */
+ *mpp = ALLOC(struct mntlist);
+
+ /*
+ * Copy the data returned by getmntent
+ */
+ (*mpp)->mnt = mnt_dup(fs_data);
+
+ /*
+ * Move to next pointer
+ */
+ mpp = &(*mpp)->mnext;
+ }
+ }
+ if (ret < 0) {
+ plog(XLOG_ERROR, "read error on %s: %m", mnttabname);
+ unlockmnttab();
+ mhp = (mntlist *) NULL;
+ }
+ *mpp = NULL;
+
+ close(fd);
+ return mhp;
+}
+
+
+static
+write_mntent_to_mtab(int fd, mntent_t *mnt)
+{
+ int wr;
+
+eagain:
+ wr = write(fd, (char *) mtab_of(mnt), sizeof(mntent_t));
+ if (wr < 0) {
+ switch (wr) {
+ case EAGAIN:
+ goto eagain;
+ default:
+ return -1;
+ }
+ }
+ if (wr != sizeof(mntent_t))
+ plog(XLOG_ERROR, "Can't write entry to %s: %m", mnttabname);
+ return 0;
+}
+
+
+void
+rewrite_mtab(mntlist *mp, const char *mnttabname)
+{
+ int fd;
+
+ assert(mtlckf != 0);
+
+ fd = open(mnttabname, O_RDWR | O_TRUNC);
+ if (fd < 0) {
+ plog(XLOG_ERROR, "Can't open %s: %m", mnttabname);
+ unlockmnttab();
+ }
+ while (mp) {
+ if (mp->mnt)
+ write_mntent_to_mtab(fd, mp->mnt);
+ mp = mp->mnext;
+ }
+
+ close(fd);
+ unlockmnttab();
+}
+
+
+void
+write_mntent(mntent_t *mp, const char *mnttabname)
+{
+ int fd;
+
+ if (lockmnttab() == -1)
+ return;
+
+ fd = open(mnttabname, O_RDWR | O_APPEND);
+ if (fd < 0) {
+ plog(XLOG_ERROR, "Unable to append %s: %m", mnttabname);
+ return;
+ }
+ write_mntent_to_mtab(fd, mp);
+
+ close(fd);
+ unlockmnttab();
+}
diff --git a/conf/mtab/mtab_linux.c b/conf/mtab/mtab_linux.c
new file mode 100644
index 000000000000..829c97a57a35
--- /dev/null
+++ b/conf/mtab/mtab_linux.c
@@ -0,0 +1,565 @@
+/*
+ * Copyright (c) 1997-2014 Erez Zadok
+ * Copyright (c) 1990 Jan-Simon Pendry
+ * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Jan-Simon Pendry at Imperial College, London.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *
+ * File: am-utils/conf/mtab/mtab_linux.c
+ *
+ */
+
+/* This file was adapted by Red Hat for Linux from mtab_file.c */
+
+/*
+ * The locking code must be kept in sync with that used
+ * by the mount command in util-linux, otherwise you'll
+ * end with with race conditions leading to a corrupt
+ * /etc/mtab, particularly when AutoFS is used on same
+ * machine as AMD.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif /* HAVE_CONFIG_H */
+#include <am_defs.h>
+#include <amu.h>
+
+#define NFILE_RETRIES 10 /* number of retries (seconds) */
+#define LOCK_TIMEOUT 10
+
+#ifdef MOUNT_TABLE_ON_FILE
+
+# define PROC_MOUNTS "/proc/mounts"
+
+static FILE *mnt_file = NULL;
+/* Information about mtab. ------------------------------------*/
+static int have_mtab_info = 0;
+static int var_mtab_does_not_exist = 0;
+static int var_mtab_is_a_symlink = 0;
+/* Flag for already existing lock file. */
+static int we_created_lockfile = 0;
+static int lockfile_fd = -1;
+
+
+static void
+get_mtab_info(void)
+{
+ struct stat mtab_stat;
+
+ if (!have_mtab_info) {
+ if (lstat(MOUNTED, &mtab_stat))
+ var_mtab_does_not_exist = 1;
+ else if (S_ISLNK(mtab_stat.st_mode))
+ var_mtab_is_a_symlink = 1;
+ have_mtab_info = 1;
+ }
+}
+
+
+static int
+mtab_is_a_symlink(void)
+{
+ get_mtab_info();
+ return var_mtab_is_a_symlink;
+}
+
+
+static int
+mtab_is_writable()
+{
+ static int ret = -1;
+
+ /*
+ * Should we write to /etc/mtab upon an update? Probably not if it is a
+ * symlink to /proc/mounts, since that would create a file /proc/mounts in
+ * case the proc filesystem is not mounted.
+ */
+ if (mtab_is_a_symlink())
+ return 0;
+
+ if (ret == -1) {
+ int fd = open(MOUNTED, O_RDWR | O_CREAT, 0644);
+ if (fd >= 0) {
+ close(fd);
+ ret = 1;
+ } else
+ ret = 0;
+ }
+ return ret;
+}
+
+
+static void
+setlkw_timeout(int sig)
+{
+ /* nothing, fcntl will fail anyway */
+}
+
+
+/*
+ * Create the lock file.
+ * The lock file will be removed if we catch a signal or when we exit.
+ *
+ * The old code here used flock on a lock file /etc/mtab~ and deleted
+ * this lock file afterwards. However, as rgooch remarks, that has a
+ * race: a second mount may be waiting on the lock and proceed as
+ * soon as the lock file is deleted by the first mount, and immediately
+ * afterwards a third mount comes, creates a new /etc/mtab~, applies
+ * flock to that, and also proceeds, so that the second and third mount
+ * now both are scribbling in /etc/mtab.
+ * The new code uses a link() instead of a creat(), where we proceed
+ * only if it was us that created the lock, and hence we always have
+ * to delete the lock afterwards. Now the use of flock() is in principle
+ * superfluous, but avoids an arbitrary sleep().
+ */
+
+/*
+ * Where does the link point to? Obvious choices are mtab and mtab~~.
+ * HJLu points out that the latter leads to races. Right now we use
+ * mtab~.<pid> instead.
+ */
+#define MOUNTED_LOCK "/etc/mtab~"
+#define MOUNTLOCK_LINKTARGET MOUNTED_LOCK "%d"
+
+int
+lock_mtab(void)
+{
+ int tries = 100000, i;
+ char *linktargetfile;
+ size_t l;
+ int rc = 1;
+
+ /*
+ * Redhat's original code set a signal handler called "handler()" for all
+ * non-ALRM signals. The handler called unlock_mntlist(), plog'ed the
+ * signal name, and then exit(1)! Never, ever, exit() from inside a
+ * utility function. This messed up Amd's careful signal-handling code,
+ * and caused Amd to abort uncleanly only any other "innocent" signal
+ * (even simple SIGUSR1), leaving behind a hung Amd mnt point. That code
+ * should have at least restored the signal handlers' states upon a
+ * successful mtab unlocking. Anyway, that handler was unnecessary,
+ * because will call unlock_mntlist() properly anyway on exit.
+ */
+ setup_sighandler(SIGALRM, setlkw_timeout);
+
+ /* somewhat clumsy, but some ancient systems do not have snprintf() */
+ /* use 20 as upper bound for the length of %d output */
+ l = strlen(MOUNTLOCK_LINKTARGET) + 20;
+ linktargetfile = xmalloc(l);
+ xsnprintf(linktargetfile, l, MOUNTLOCK_LINKTARGET, getpid());
+
+ i = open(linktargetfile, O_WRONLY|O_CREAT, 0);
+ if (i < 0) {
+ int errsv = errno;
+ /*
+ * linktargetfile does not exist (as a file) and we cannot create
+ * it. Read-only filesystem? Too many files open in the system?
+ * Filesystem full?
+ */
+ plog(XLOG_ERROR, "%s: can't create lock file %s: %s "
+ "(use -n flag to override)", __func__,
+ linktargetfile, strerror(errsv));
+ goto error;
+ }
+ close(i);
+
+
+ /* Repeat until it was us who made the link */
+ while (!we_created_lockfile) {
+ struct flock flock;
+ int errsv, j;
+
+ j = link(linktargetfile, MOUNTED_LOCK);
+ errsv = errno;
+
+ if (j < 0 && errsv != EEXIST) {
+ (void) unlink(linktargetfile);
+ plog(XLOG_ERROR, "can't link lock file %s: %s ",
+ MOUNTED_LOCK, strerror(errsv));
+ rc = 0;
+ goto error;
+ }
+
+ lockfile_fd = open(MOUNTED_LOCK, O_WRONLY);
+ if (lockfile_fd < 0) {
+ int errsv = errno;
+ /* Strange... Maybe the file was just deleted? */
+ if (errno == ENOENT && tries-- > 0) {
+ if (tries % 200 == 0)
+ usleep(30);
+ continue;
+ }
+ (void) unlink(linktargetfile);
+ plog(XLOG_ERROR,"%s: can't open lock file %s: %s ", __func__,
+ MOUNTED_LOCK, strerror(errsv));
+ rc = 0;
+ goto error;
+ }
+
+ flock.l_type = F_WRLCK;
+ flock.l_whence = SEEK_SET;
+ flock.l_start = 0;
+ flock.l_len = 0;
+
+ if (j == 0) {
+ /* We made the link. Now claim the lock. */
+ if (fcntl(lockfile_fd, F_SETLK, &flock) == -1) {
+ int errsv = errno;
+ plog(XLOG_ERROR, "%s: Can't lock lock file %s: %s", __func__,
+ MOUNTED_LOCK, strerror(errsv));
+ /* proceed, since it was us who created the lockfile anyway */
+ }
+ we_created_lockfile = 1;
+ (void) unlink(linktargetfile);
+ } else {
+ static int tries = 0;
+
+ /* Someone else made the link. Wait. */
+ alarm(LOCK_TIMEOUT);
+
+ if (fcntl(lockfile_fd, F_SETLKW, &flock) == -1) {
+ int errsv = errno;
+ (void) unlink(linktargetfile);
+ plog(XLOG_ERROR, "%s: can't lock lock file %s: %s", __func__,
+ MOUNTED_LOCK, (errno == EINTR) ?
+ "timed out" : strerror(errsv));
+ rc = 0;
+ goto error;
+ }
+ alarm(0);
+ /*
+ * Limit the number of iterations - maybe there
+ * still is some old /etc/mtab~
+ */
+ ++tries;
+ if (tries % 200 == 0)
+ usleep(30);
+ if (tries > 100000) {
+ (void) unlink(linktargetfile);
+ close(lockfile_fd);
+ plog(XLOG_ERROR,
+ "%s: Cannot create link %s; Perhaps there is a stale lock file?",
+ __func__, MOUNTED_LOCK);
+ rc = 0;
+ goto error;
+ }
+ close(lockfile_fd);
+ }
+ }
+
+error:
+ XFREE(linktargetfile);
+
+ return rc;
+}
+
+
+static FILE *
+open_locked_mtab(const char *mnttabname, char *mode, char *fs)
+{
+ FILE *mfp = NULL;
+
+ if (mnt_file) {
+ dlog("Forced close on %s in read_mtab", mnttabname);
+ endmntent(mnt_file);
+ mnt_file = NULL;
+ }
+
+ if (!mtab_is_a_symlink() &&
+ !lock_mtab()) {
+ plog(XLOG_ERROR, "%s: Couldn't lock mtab", __func__);
+ return 0;
+ }
+
+ mfp = setmntent((char *)mnttabname, mode);
+ if (!mfp) {
+ plog(XLOG_ERROR, "%s: setmntent(\"%s\", \"%s\"): %m", __func__, mnttabname,
+ mode);
+ return 0;
+ }
+ return mfp;
+}
+
+
+/*
+ * Unlock the mount table
+ */
+void
+unlock_mntlist(void)
+{
+ if (mnt_file || we_created_lockfile)
+ dlog("unlock_mntlist: releasing");
+ if (mnt_file) {
+ endmntent(mnt_file);
+ mnt_file = NULL;
+ }
+ if (we_created_lockfile) {
+ close(lockfile_fd);
+ lockfile_fd = -1;
+ unlink(MOUNTED_LOCK);
+ we_created_lockfile = 0;
+ }
+}
+
+
+/*
+ * Write out a mount list
+ */
+void
+rewrite_mtab(mntlist *mp, const char *mnttabname)
+{
+ FILE *mfp;
+ int error = 0;
+ char tmpname[64];
+ int retries;
+ int tmpfd;
+ char *cp;
+ char mcp[128];
+
+ if (!mtab_is_writable()) {
+ return;
+ }
+
+ /*
+ * Concoct a temporary name in the same directory as the target mount
+ * table so that rename() will work.
+ */
+ xstrlcpy(mcp, mnttabname, sizeof(mcp));
+ cp = strrchr(mcp, '/');
+ if (cp) {
+ memmove(tmpname, mcp, cp - mcp);
+ tmpname[cp - mcp] = '\0';
+ } else {
+ plog(XLOG_WARNING, "No '/' in mtab (%s), using \".\" as tmp directory", mnttabname);
+ tmpname[0] = '.';
+ tmpname[1] = '\0';
+ }
+ xstrlcat(tmpname, "/mtabXXXXXX", sizeof(tmpname));
+ retries = 0;
+ enfile1:
+#ifdef HAVE_MKSTEMP
+ tmpfd = mkstemp(tmpname);
+ fchmod(tmpfd, 0644);
+#else /* not HAVE_MKSTEMP */
+ mktemp(tmpname);
+ tmpfd = open(tmpname, O_RDWR | O_CREAT | O_TRUNC, 0644);
+#endif /* not HAVE_MKSTEMP */
+ if (tmpfd < 0) {
+ if (errno == ENFILE && retries++ < NFILE_RETRIES) {
+ sleep(1);
+ goto enfile1;
+ }
+ plog(XLOG_ERROR, "%s: open: %m", tmpname);
+ return;
+ }
+ if (close(tmpfd) < 0)
+ plog(XLOG_ERROR, "%s: Couldn't close tmp file descriptor: %m", __func__);
+
+ retries = 0;
+ enfile2:
+ mfp = setmntent(tmpname, "w");
+ if (!mfp) {
+ if (errno == ENFILE && retries++ < NFILE_RETRIES) {
+ sleep(1);
+ goto enfile2;
+ }
+ plog(XLOG_ERROR, "%s: setmntent(\"%s\", \"w\"): %m", __func__, tmpname);
+ error = 1;
+ goto out;
+ }
+ while (mp) {
+ if (mp->mnt) {
+ if (addmntent(mfp, mp->mnt)) {
+ plog(XLOG_ERROR, "%s: Can't write entry to %s", __func__, tmpname);
+ error = 1;
+ goto out;
+ }
+ }
+ mp = mp->mnext;
+ }
+
+ /*
+ * SunOS 4.1 manuals say that the return code from entmntent()
+ * is always 1 and to treat as a void. That means we need to
+ * call fflush() to make sure the new mtab file got written.
+ */
+ if (fflush(mfp)) {
+ plog(XLOG_ERROR, "flush new mtab file: %m");
+ error = 1;
+ goto out;
+ }
+ (void) endmntent(mfp);
+
+ /*
+ * Rename temporary mtab to real mtab
+ */
+ if (rename(tmpname, mnttabname) < 0) {
+ plog(XLOG_ERROR, "rename %s to %s: %m", tmpname, mnttabname);
+ error = 1;
+ goto out;
+ }
+ out:
+ if (error)
+ (void) unlink(tmpname);
+}
+
+
+static void
+mtab_stripnl(char *s)
+{
+ do {
+ s = strchr(s, '\n');
+ if (s)
+ *s++ = ' ';
+ } while (s);
+}
+
+
+/*
+ * Append a mntent structure to the
+ * current mount table.
+ */
+void
+write_mntent(mntent_t *mp, const char *mnttabname)
+{
+ int retries = 0;
+ FILE *mfp;
+
+ if (!mtab_is_writable()) {
+ return;
+ }
+
+ enfile:
+ mfp = open_locked_mtab(mnttabname, "a", mp->mnt_dir);
+ if (mfp) {
+ mtab_stripnl(mp->mnt_opts);
+ if (addmntent(mfp, mp))
+ plog(XLOG_ERROR, "%s: Couldn't write %s: %m", __func__, mnttabname);
+ if (fflush(mfp))
+ plog(XLOG_ERROR, "%s: Couldn't flush %s: %m", __func__, mnttabname);
+ (void) endmntent(mfp);
+ } else {
+ if (errno == ENFILE && retries < NFILE_RETRIES) {
+ sleep(1);
+ goto enfile;
+ }
+ plog(XLOG_ERROR, "%s: setmntent(\"%s\", \"a\"): %m", __func__, mnttabname);
+ }
+
+ unlock_mntlist();
+}
+
+#endif /* MOUNT_TABLE_ON_FILE */
+
+
+static mntent_t *
+mnt_dup(mntent_t *mp)
+{
+ mntent_t *new_mp = ALLOC(mntent_t);
+
+ new_mp->mnt_fsname = xstrdup(mp->mnt_fsname);
+ new_mp->mnt_dir = xstrdup(mp->mnt_dir);
+ new_mp->mnt_type = xstrdup(mp->mnt_type);
+ new_mp->mnt_opts = xstrdup(mp->mnt_opts);
+
+ new_mp->mnt_freq = mp->mnt_freq;
+ new_mp->mnt_passno = mp->mnt_passno;
+
+#ifdef HAVE_MNTENT_T_MNT_TIME
+# ifdef HAVE_MNTENT_T_MNT_TIME_STRING
+ new_mp->mnt_time = xstrdup(mp->mnt_time);
+# else /* not HAVE_MNTENT_T_MNT_TIME_STRING */
+ new_mp->mnt_time = mp->mnt_time;
+# endif /* not HAVE_MNTENT_T_MNT_TIME_STRING */
+#endif /* HAVE_MNTENT_T_MNT_TIME */
+
+#ifdef HAVE_MNTENT_T_MNT_CNODE
+ new_mp->mnt_cnode = mp->mnt_cnode;
+#endif /* HAVE_MNTENT_T_MNT_CNODE */
+
+ return new_mp;
+}
+
+
+/*
+ * Read a mount table into memory
+ */
+mntlist *
+read_mtab(char *fs, const char *mnttabname)
+{
+ mntlist **mpp, *mhp;
+
+ mntent_t *mep;
+
+ FILE *mfp = open_locked_mtab(mnttabname, "r+", fs);
+
+ if (!mfp)
+ return 0;
+
+ mpp = &mhp;
+
+ /*
+ * XXX - In SunOS 4 there is (yet another) memory leak
+ * which loses 1K the first time getmntent is called.
+ * (jsp)
+ */
+ while ((mep = getmntent(mfp))) {
+ /*
+ * Allocate a new slot
+ */
+ *mpp = ALLOC(struct mntlist);
+
+ /*
+ * Copy the data returned by getmntent
+ */
+ (*mpp)->mnt = mnt_dup(mep);
+
+ /*
+ * Move to next pointer
+ */
+ mpp = &(*mpp)->mnext;
+ }
+ *mpp = NULL;
+
+#ifdef MOUNT_TABLE_ON_FILE
+ /*
+ * If we are not updating the mount table then we
+ * can free the resources held here, otherwise they
+ * must be held until the mount table update is complete
+ */
+ mnt_file = mfp;
+#else /* not MOUNT_TABLE_ON_FILE */
+ endmntent(mfp);
+#endif /* not MOUNT_TABLE_ON_FILE */
+
+ return mhp;
+}
diff --git a/conf/mtab/mtab_mach3.c b/conf/mtab/mtab_mach3.c
new file mode 100644
index 000000000000..af1313d3d8da
--- /dev/null
+++ b/conf/mtab/mtab_mach3.c
@@ -0,0 +1,501 @@
+/*
+ * Copyright (c) 1997-2014 Erez Zadok
+ * Copyright (c) 1990 Jan-Simon Pendry
+ * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Jan-Simon Pendry at Imperial College, London.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *
+ * File: am-utils/conf/mtab/mtab_mach3.c
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif /* HAVE_CONFIG_H */
+#include <am_defs.h>
+#include <amu.h>
+
+#define NFILE_RETRIES 10 /* number of retries (seconds) */
+
+static FILE *mnt_file;
+
+
+/*
+ * If the system is being trashed by something, then
+ * opening mtab may fail with ENFILE. So, go to sleep
+ * for a second and try again. (Yes - this has happened to me.)
+ *
+ * Note that this *may* block the automounter, oh well.
+ * If we get to this state then things are badly wrong anyway...
+ *
+ * Give the system 10 seconds to recover but then give up.
+ * Hopefully something else will exit and free up some file
+ * table slots in that time.
+ */
+#ifdef HAVE_FCNTL_H
+static int
+lock(int fd)
+{
+ int rc;
+ struct flock lk;
+
+ lk.l_type = F_WRLCK;
+ lk.l_whence = 0;
+ lk.l_start = 0;
+ lk.l_len = 0;
+
+again:
+ rc = fcntl(fd, F_SETLKW, (caddr_t) & lk);
+ if (rc < 0 && (errno == EACCES || errno == EAGAIN)) {
+# ifdef DEBUG
+ dlog("Blocked, trying to obtain exclusive mtab lock");
+# endif /* DEBUG */
+ sleep(1);
+ goto again;
+ }
+ return rc;
+}
+#else /* not HAVE_FCNTL_H */
+# define lock(fd) (flock((fd), LOCK_EX))
+#endif /* not HAVE_FCNTL_H */
+
+
+static FILE *
+open_locked_mtab(char *mnttabname, char *mode, char *fs)
+{
+ FILE *mfp = NULL;
+
+ /*
+ * There is a possible race condition if two processes enter
+ * this routine at the same time. One will be blocked by the
+ * exclusive lock below (or by the shared lock in setmntent)
+ * and by the time the second process has the exclusive lock
+ * it will be on the wrong underlying object. To check for this
+ * the mtab file is stat'ed before and after all the locking
+ * sequence, and if it is a different file then we assume that
+ * it may be the wrong file (only "may", since there is another
+ * race between the initial stat and the setmntent).
+ *
+ * Simpler solutions to this problem are invited...
+ */
+ int racing = 2;
+ int rc;
+ int retries = 0;
+ struct stat st_before, st_after;
+
+ if (mnt_file) {
+#ifdef DEBUG
+ dlog("Forced close on %s in read_mtab", mnttabname);
+#endif /* DEBUG */
+ endmntent(mnt_file);
+ mnt_file = NULL;
+ }
+again:
+ if (mfp) {
+ endmntent(mfp);
+ mfp = NULL;
+ }
+ if (stat(mnttabname, &st_before) < 0) {
+ plog(XLOG_ERROR, "%s: stat: %m", mnttabname);
+ if (errno == ESTALE) {
+ /* happens occasionally */
+ sleep(1);
+ goto again;
+ }
+ /*
+ * If 'mnttabname' file does not exist give setmntent() a
+ * chance to create it (depending on the mode).
+ * Otherwise, bail out.
+ */
+ else if (errno != ENOENT) {
+ return 0;
+ }
+ }
+eacces:
+ mfp = setmntent(mnttabname, mode);
+ if (!mfp) {
+ /*
+ * Since setmntent locks the descriptor, it
+ * is possible it can fail... so retry if
+ * needed.
+ */
+ if (errno == EACCES || errno == EAGAIN) {
+#ifdef DEBUG
+ dlog("Blocked, trying to obtain exclusive mtab lock");
+#endif /* DEBUG */
+ goto eacces;
+ } else if (errno == ENFILE && retries++ < NFILE_RETRIES) {
+ sleep(1);
+ goto eacces;
+ }
+ plog(XLOG_ERROR, "setmntent(\"%s\", \"%s\"): %m", mnttabname, mode);
+ return 0;
+ }
+ /*
+ * At this point we have an exclusive lock on the mount list,
+ * but it may be the wrong one so...
+ */
+
+ /*
+ * Need to get an exclusive lock on the current
+ * mount table until we have a new copy written
+ * out, when the lock is released in free_mntlist.
+ * flock is good enough since the mount table is
+ * not shared between machines.
+ */
+ do
+ rc = lock(fileno(mfp));
+ while (rc < 0 && errno == EINTR);
+ if (rc < 0) {
+ plog(XLOG_ERROR, "Couldn't lock %s: %m", mnttabname);
+ endmntent(mfp);
+ return 0;
+ }
+ /*
+ * Now check whether the mtab file has changed under our feet
+ */
+ if (stat(mnttabname, &st_after) < 0) {
+ plog(XLOG_ERROR, "%s: stat", mnttabname);
+ goto again;
+ }
+ if (st_before.st_dev != st_after.st_dev ||
+ st_before.st_ino != st_after.st_ino) {
+ struct timeval tv;
+ if (racing == 0) {
+ /* Sometimes print a warning */
+ plog(XLOG_WARNING,
+ "Possible mount table race - retrying %s", fs);
+ }
+ racing = (racing + 1) & 3;
+ /*
+ * Take a nap. From: Doug Kingston <dpk@morgan.com>
+ */
+ tv.tv_sec = 0;
+ tv.tv_usec = (am_mypid & 0x07) << 17;
+ if (tv.tv_usec)
+ if (select(0, (voidp) 0, (voidp) 0, (voidp) 0, &tv) < 0)
+ plog(XLOG_WARNING, "mtab nap failed: %m");
+
+ goto again;
+ }
+ return mfp;
+}
+
+
+/*
+ * Unlock the mount table
+ */
+void
+unlock_mntlist(void)
+{
+ /*
+ * Release file lock, by closing the file
+ */
+ if (mnt_file) {
+ dlog("unlock_mntlist: releasing");
+ endmntent(mnt_file);
+ mnt_file = NULL;
+ }
+}
+
+
+/*
+ * routine to convert notation "/@honeydew" to the notation
+ * honeydew:/ and vice versa (honeydew:/ to /@honeydew)
+ * This lets you put /@honeydew in /etc/fstab without changing
+ * fstab.c and it lets you use EITHER notation on the command line!
+ */
+static char *
+convert(register char *s, char bad, char good)
+{
+ char *index();
+ register char *t, *p;
+ register int len1, len2, i;
+ char *ptr;
+
+ if ((p = index(s, bad)) == NULL) {
+ return (s);
+ }
+ ptr = t = (char *) xzalloc(MAXPATHLEN * sizeof(char));
+ len1 = p - s;
+ len2 = strlen(s) - len1 - 1;
+ p++;
+ for (i = 0; i < len2; i++)
+ *t++ = p[i];
+ *t++ = good;
+ for (i = 0; i < len1; i++)
+ *t++ = s[i];
+ return (ptr);
+}
+
+
+static
+mntprtent3(FILE *mnttabp, register mntent_t *mnt)
+{
+ char *cvtd = convert(mnt->mnt_fsname, ':', '@');
+
+ dlog("%x:%s:%s:%s:%d:%d:%s:%s:\n",
+ mnttabp,
+ (cvtd ? cvtd : ""),
+ (mnt->mnt_dir ? mnt->mnt_dir : ""),
+ (mnt->mnt_opts ? mnt->mnt_opts : ""),
+ mnt->mnt_freq,
+ mnt->mnt_passno,
+ (mnt->mnt_type ? mnt->mnt_type : ""),
+ (mnt->mnt_opts2 ? mnt->mnt_opts2 : "")
+ );
+ fprintf(mnttabp, "%s:%s:%s:%d:%d:%s:%s:\n",
+ (cvtd ? cvtd : ""),
+ (mnt->mnt_dir ? mnt->mnt_dir : ""),
+ (mnt->mnt_opts ? mnt->mnt_opts : ""),
+ mnt->mnt_freq,
+ mnt->mnt_passno,
+ (mnt->mnt_type ? mnt->mnt_type : ""),
+ (mnt->mnt_opts2 ? mnt->mnt_opts2 : "")
+ );
+ XFREE(cvtd);
+ cvtd = NULL;
+ return (0);
+}
+
+
+addmntent3(FILE *mnttabp, register mntent_t *mnt)
+{
+ if (fseek(mnttabp, 0, 2) < 0) {
+ return (1);
+ }
+ mntprtent3(mnttabp, mnt);
+ return (0);
+}
+
+
+/*
+ * Write out a mount list
+ */
+void
+rewrite_mtab(mntlist *mp, const char *mnttabname)
+{
+ FILE *mfp;
+ int error = 0;
+ /*
+ * Concoct a temporary name in the same directory as the target mount
+ * table so that rename() will work.
+ */
+ char tmpname[64];
+ int retries;
+ int tmpfd;
+ char *cp;
+ char *mcp = mnttabname;
+
+ cp = strrchr(mcp, '/');
+ if (cp) {
+ memmove(tmpname, mcp, cp - mcp);
+ tmpname[cp - mcp] = '\0';
+ } else {
+ plog(XLOG_WARNING, "No '/' in mtab (%s), using \".\" as tmp directory", mnttabname);
+ tmpname[0] = '.';
+ tmpname[1] = '\0';
+ }
+ xstrlcat(tmpname, "/mtabXXXXXX", sizeof(tmpname));
+ retries = 0;
+enfile1:
+#ifdef HAVE_MKSTEMP
+ tmpfd = mkstemp(tmpname);
+ fchmod(tmpfd, 0644);
+#else /* not HAVE_MKSTEMP */
+ mktemp(tmpname);
+ tmpfd = open(tmpname, O_RDWR | O_CREAT | O_TRUNC, 0644);
+#endif /* not HAVE_MKSTEMP */
+ if (tmpfd < 0) {
+ if (errno == ENFILE && retries++ < NFILE_RETRIES) {
+ sleep(1);
+ goto enfile1;
+ }
+ plog(XLOG_ERROR, "%s: open: %m", tmpname);
+ return;
+ }
+ if (close(tmpfd) < 0)
+ plog(XLOG_ERROR, "Couldn't close tmp file descriptor: %m");
+
+ retries = 0;
+enfile2:
+ mfp = setmntent(tmpname, "w");
+ if (!mfp) {
+ if (errno == ENFILE && retries++ < NFILE_RETRIES) {
+ sleep(1);
+ goto enfile2;
+ }
+ plog(XLOG_ERROR, "setmntent(\"%s\", \"w\"): %m", tmpname);
+ error = 1;
+ goto out;
+ }
+ while (mp) {
+ if (mp->mnt) {
+ if (addmntent3(mfp, mp->mnt)) {
+ plog(XLOG_ERROR, "Can't write entry to %s", tmpname);
+ error = 1;
+ goto out;
+ }
+ }
+ mp = mp->mnext;
+ }
+
+ /*
+ * SunOS 4.1 manuals say that the return code from endmntent()
+ * is always 1 and to treat as a void. That means we need to
+ * call fflush() to make sure the new mtab file got written.
+ */
+ if (fflush(mfp)) {
+ plog(XLOG_ERROR, "flush new mtab file: %m");
+ error = 1;
+ goto out;
+ }
+ (void) endmntent(mfp);
+
+ /*
+ * Rename temporary mtab to real mtab
+ */
+ if (rename(tmpname, mnttabname) < 0) {
+ plog(XLOG_ERROR, "rename %s to %s: %m", tmpname, mnttabname);
+ error = 1;
+ goto out;
+ }
+out:
+ if (error)
+ (void) unlink(tmpname);
+}
+
+
+static void
+mtab_stripnl(char *s)
+{
+ do {
+ s = strchr(s, '\n');
+ if (s)
+ *s++ = ' ';
+ } while (s);
+}
+
+
+/*
+ * Append a mntent structure to the
+ * current mount table.
+ */
+void
+write_mntent(mntent_t *mp, const char *mnttabname)
+{
+ int retries = 0;
+ FILE *mfp;
+enfile:
+ mfp = open_locked_mtab(mnttabname, "a", mp->mnt_dir);
+ if (mfp) {
+ mtab_stripnl(mp->mnt_opts);
+ if (addmntent3(mfp, mp))
+ plog(XLOG_ERROR, "Couldn't write %s: %m", mnttabname);
+ if (fflush(mfp))
+ plog(XLOG_ERROR, "Couldn't flush %s: %m", mnttabname);
+ (void) endmntent(mfp);
+ } else {
+ if (errno == ENFILE && retries < NFILE_RETRIES) {
+ sleep(1);
+ goto enfile;
+ }
+ plog(XLOG_ERROR, "setmntent(\"%s\", \"a\"): %m", mnttabname);
+ }
+}
+
+
+static mntent_t *
+mnt_dup(mntent_t *mp)
+{
+ mntent_t *new_mp = ALLOC(mntent_t);
+
+ new_mp->mnt_fsname = convert(mp->mnt_fsname, '@', ':');
+
+ new_mp->mnt_dir = xstrdup(mp->mnt_dir);
+ new_mp->mnt_type = xstrdup(mp->mnt_type);
+ new_mp->mnt_opts = xstrdup(mp->mnt_opts);
+
+ new_mp->mnt_freq = mp->mnt_freq;
+ new_mp->mnt_passno = mp->mnt_passno;
+
+ return new_mp;
+}
+
+
+/*
+ * Read a mount table into memory
+ */
+mntlist *
+read_mtab(char *fs, const char *mnttabname)
+{
+ mntlist **mpp, *mhp;
+
+ mntent_t *mep;
+ FILE *mfp = open_locked_mtab(mnttabname, "r+", fs);
+
+ if (!mfp)
+ return 0;
+
+ mpp = &mhp;
+
+/*
+ * XXX - In SunOS 4 there is (yet another) memory leak
+ * which loses 1K the first time getmntent is called.
+ * (jsp)
+ */
+ while (mep = getmntent(mfp)) {
+ /*
+ * Allocate a new slot
+ */
+ *mpp = ALLOC(struct mntlist);
+
+ /*
+ * Copy the data returned by getmntent
+ */
+ (*mpp)->mnt = mnt_dup(mep);
+
+ /*
+ * Move to next pointer
+ */
+ mpp = &(*mpp)->mnext;
+ }
+ *mpp = NULL;
+
+ /*
+ * If we are not updating the mount table then we
+ * can free the resources held here, otherwise they
+ * must be held until the mount table update is complete
+ */
+ mnt_file = mfp;
+
+ return mhp;
+}
diff --git a/conf/mtab/mtab_osf.c b/conf/mtab/mtab_osf.c
new file mode 100644
index 000000000000..b9a1de533234
--- /dev/null
+++ b/conf/mtab/mtab_osf.c
@@ -0,0 +1,146 @@
+/*
+ * Copyright (c) 1997-2014 Erez Zadok
+ * Copyright (c) 1990 Jan-Simon Pendry
+ * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Jan-Simon Pendry at Imperial College, London.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *
+ * File: am-utils/conf/mtab/mtab_osf.c
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif /* HAVE_CONFIG_H */
+#include <am_defs.h>
+#include <amu.h>
+
+
+static mntent_t *
+mnt_dup(struct statfs *mp)
+{
+ mntent_t *new_mp = ALLOC(mntent_t);
+ char *ty;
+ char *at;
+ char mntfrombuf[MNAMELEN];
+ char *mntfromptr;
+
+ /*
+ * Under DEC OSF/1 T1.2-2 the f_mntfromname fields of
+ * the statfs structure can be in the format <fs>@<host>
+ * instead of <host>:<fs>. Here we check for this and
+ * reformat it if necessary.
+ */
+ mntfromptr = mp->f_mntfromname;
+
+ switch (mp->f_type) {
+ case MOUNT_TYPE_NFS:
+#ifdef HAVE_FS_NFS3
+ case MOUNT_TYPE_NFS3:
+#endif /* HAVE_FS_NFS3 */
+ at = strchr(mp->f_mntfromname, '@');
+ if (at != '\0') {
+ xstrlcpy(mntfrombuf, (at + 1), sizeof(mntfrombuf));
+ xstrlcat(mntfrombuf, ":", sizeof(mntfrombuf));
+ strncat(mntfrombuf, mp->f_mntfromname, (at - mp->f_mntfromname));
+ mntfromptr = mntfrombuf;
+ }
+ }
+ new_mp->mnt_fsname = xstrdup(mntfromptr);
+
+ new_mp->mnt_dir = xstrdup(mp->f_mntonname);
+ switch (mp->f_type) {
+ case MOUNT_TYPE_UFS:
+ ty = MNTTAB_TYPE_UFS;
+ break;
+#ifdef HAVE_FS_NFS3
+ case MOUNT_TYPE_NFS3:
+ ty = MNTTAB_TYPE_NFS3;
+ break;
+#endif /* HAVE_FS_NFS3 */
+ case MOUNT_TYPE_NFS:
+ ty = MNTTAB_TYPE_NFS;
+ break;
+ case MOUNT_TYPE_MFS:
+ ty = MNTTAB_TYPE_MFS;
+ break;
+ default:
+ ty = "unknown";
+ break;
+ }
+
+ new_mp->mnt_type = xstrdup(ty);
+ new_mp->mnt_opts = xstrdup("unset");
+ new_mp->mnt_freq = 0;
+ new_mp->mnt_passno = 0;
+
+ return new_mp;
+}
+
+
+/*
+ * Read a mount table into memory
+ */
+mntlist *
+read_mtab(char *fs, const char *mnttabname)
+{
+ mntlist **mpp, *mhp;
+ struct statfs *mntbufp, *mntp;
+
+ int nloc = getmntinfo(&mntbufp, MNT_NOWAIT);
+
+ if (nloc == 0) {
+ plog(XLOG_ERROR, "Can't read mount table");
+ return 0;
+ }
+ mpp = &mhp;
+ for (mntp = mntbufp; mntp < mntbufp + nloc; mntp++) {
+ /*
+ * Allocate a new slot
+ */
+ *mpp = ALLOC(struct mntlist);
+
+ /*
+ * Copy the data returned by getmntent
+ */
+ (*mpp)->mnt = mnt_dup(mntp);
+
+ /*
+ * Move to next pointer
+ */
+ mpp = &(*mpp)->mnext;
+ }
+
+ /* terminate the linked list */
+ *mpp = NULL;
+
+ return mhp;
+}
diff --git a/conf/mtab/mtab_svr4.c b/conf/mtab/mtab_svr4.c
new file mode 100644
index 000000000000..b9a310a1903c
--- /dev/null
+++ b/conf/mtab/mtab_svr4.c
@@ -0,0 +1,302 @@
+/*
+ * Copyright (c) 1997-2014 Erez Zadok
+ * Copyright (c) 1990 Jan-Simon Pendry
+ * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Jan-Simon Pendry at Imperial College, London.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *
+ * File: am-utils/conf/mtab/mtab_svr4.c
+ *
+ * How to manage the mount table file. Based on other SVR3 ports.
+ * -Erez Zadok <ezk@cs.columbia.edu>
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif /* HAVE_CONFIG_H */
+#include <am_defs.h>
+#include <amu.h>
+
+/*
+ * file descriptor for lock file
+ * values: -1 no file-descriptor was set yet (or mnttab unlocked, or error
+ * in locking).
+ * >=0 legal file-descriptor value (file lock succeeded)
+ */
+static int mntent_lock_fd = -1;
+
+
+#ifdef MOUNT_TABLE_ON_FILE
+static char mtlckname[] = "/etc/.mnttab.lock";
+#endif /* MOUNT_TABLE_ON_FILE */
+
+
+/****************************************************************************/
+/*** Private functions */
+/****************************************************************************/
+
+static void
+unlockmnttab(void)
+{
+#ifdef MOUNT_TABLE_ON_FILE
+ if (mntent_lock_fd >= 0) {
+ close(mntent_lock_fd);
+ mntent_lock_fd = -1;
+ }
+#endif /* MOUNT_TABLE_ON_FILE */
+}
+
+
+#ifdef MOUNT_TABLE_ON_FILE
+static int
+lockfile(int fd, int type)
+{
+ struct flock lk;
+ int ret;
+
+ lk.l_type = type;
+ lk.l_whence = 0;
+ lk.l_start = 0;
+ lk.l_len = 0;
+
+ /*
+ * F_SETLKW means to block until the read or write block is free to be
+ * locked.
+ */
+ ret = fcntl(fd, F_SETLKW, &lk);
+ return ret;
+}
+#endif /* MOUNT_TABLE_ON_FILE */
+
+
+/* return 0 if locking succeeded, -1 if failed */
+static int
+lockmnttab(void)
+{
+#ifdef MOUNT_TABLE_ON_FILE
+ /* if mnttab file is locked, all is well */
+ if (mntent_lock_fd >= 0)
+ return 0;
+
+ /* need to lock mnttab file. first, open the file */
+ mntent_lock_fd = open(mtlckname, O_RDWR | O_CREAT, 0600);
+ if (mntent_lock_fd < 0) {
+ plog(XLOG_ERROR, "Unable to open/creat %s: %m", mtlckname);
+ return -1;
+ }
+
+ /* if succeeded in opening the file, try to lock it */
+ if (lockfile(mntent_lock_fd, F_WRLCK) < 0) {
+ close(mntent_lock_fd);
+ mntent_lock_fd = -1;
+#ifdef DEBUG
+ dlog("lock %s failed: %m", mtlckname);
+#endif /* DEBUG */
+ return -1;
+ }
+#else /* not MOUNT_TABLE_ON_FILE */
+ /* fake lock for in-kernel mount table */
+#endif /* not MOUNT_TABLE_ON_FILE */
+
+ /* finally, succeeded in also locking the file */
+ return 0;
+}
+
+
+/*
+ * Convert from solaris mnttab to Amd mntent. Since am-utils uses
+ * native "struct mnttab" if available, this really copies fields of
+ * the same structure.
+ */
+static mntent_t *
+mnt_dup(const mntent_t *mtp)
+{
+ mntent_t *mep = ALLOC(mntent_t);
+
+ mep->mnt_fsname = xstrdup(mtp->mnt_fsname);
+ mep->mnt_dir = xstrdup(mtp->mnt_dir);
+ mep->mnt_type = xstrdup(mtp->mnt_type);
+ mep->mnt_opts = xstrdup(mtp->mnt_opts);
+ mep->mnt_time = xstrdup(mtp->mnt_time);
+
+ return mep;
+}
+
+
+/*
+ * Adjust arguments in mntent_t.
+ */
+#ifdef MOUNT_TABLE_ON_FILE
+static mntent_t *
+update_mnttab_fields(const mntent_t *mnt)
+{
+ static mntent_t mt;
+ static char timestr[16];
+ struct timeval tv;
+
+ /* most fields don't change, only update mnt_time below */
+ mt.mnt_fsname = mnt->mnt_fsname;
+ mt.mnt_dir = mnt->mnt_dir;
+ mt.mnt_type = mnt->mnt_type;
+ mt.mnt_opts = mnt->mnt_opts;
+
+ /*
+ * Solaris 2.5 and newer take a second argument to gettimeofday(). If you
+ * find a useful svr4-like OS that uses the old style, and this code here
+ * fails, then create a new autoconf test that will determine the number
+ * of arguments gettimeofday() takes. -Erez.
+ */
+ if (gettimeofday(&tv, NULL) < 0)
+ timestr[0] = '\0';
+ else
+ xsnprintf(timestr, sizeof(timestr), "%ld", tv.tv_sec);
+
+ mt.mnt_time = timestr;
+
+ return &mt;
+}
+#endif /* MOUNT_TABLE_ON_FILE */
+
+
+static void
+write_mntent_to_mtab(FILE *fp, const mntent_t *mnt)
+{
+#ifdef MOUNT_TABLE_ON_FILE
+ putmntent(fp, update_mnttab_fields(mnt));
+#endif /* MOUNT_TABLE_ON_FILE */
+}
+
+
+/****************************************************************************/
+/*** Public functions */
+/****************************************************************************/
+
+
+void
+unlock_mntlist(void)
+{
+ unlockmnttab();
+}
+
+
+/*
+ * Read a mount table into memory
+ */
+mntlist *
+read_mtab(char *fs, const char *mnttabname)
+{
+ mntlist **mpp, *mhp;
+ FILE *fp;
+ mntent_t mountbuf;
+ int ret;
+
+ if (lockmnttab() < 0) /* failed locking */
+ return NULL;
+
+ fp = fopen(mnttabname, "r");
+ if (fp == NULL) {
+ plog(XLOG_ERROR, "Can't open %s: %m", mnttabname);
+ return NULL;
+ }
+ mpp = &mhp;
+
+ while ((ret = getmntent(fp, &mountbuf)) == 0) {
+ /*
+ * Allocate a new slot
+ */
+ *mpp = ALLOC(struct mntlist);
+
+ /*
+ * Copy the data returned by getmntent
+ */
+ (*mpp)->mnt = mnt_dup(&mountbuf);
+
+ /*
+ * Move to next pointer
+ */
+ mpp = &(*mpp)->mnext;
+ }
+
+ if (ret > 0) {
+ plog(XLOG_ERROR, "read error on %s: %m", mnttabname);
+ unlockmnttab();
+ mhp = NULL;
+ }
+ *mpp = NULL;
+
+ fclose(fp);
+ return mhp;
+}
+
+
+void
+rewrite_mtab(mntlist *mp, const char *mnttabname)
+{
+ FILE *fp;
+
+ assert(mntent_lock_fd >= 0); /* ensure lock fd is valid */
+
+ fp = fopen(mnttabname, "r+");
+ if (fp == NULL) {
+ plog(XLOG_ERROR, "Can't open %s: %m", mnttabname);
+ unlockmnttab();
+ return;
+ }
+ while (mp) {
+ if (mp->mnt)
+ write_mntent_to_mtab(fp, mp->mnt);
+ mp = mp->mnext;
+ }
+
+ ftruncate(fileno(fp), ftell(fp));
+ fclose(fp);
+ unlockmnttab();
+}
+
+
+void
+write_mntent(mntent_t *mtp, const char *mnttabname)
+{
+ FILE *fp;
+
+ if (lockmnttab() < 0)
+ return;
+
+ fp = fopen(mnttabname, "a");
+ if (fp == NULL) {
+ plog(XLOG_ERROR, "Unable to append %s: %m", mnttabname);
+ return;
+ }
+ write_mntent_to_mtab(fp, mtp);
+
+ fclose(fp);
+ unlockmnttab();
+}
diff --git a/conf/mtab/mtab_ultrix.c b/conf/mtab/mtab_ultrix.c
new file mode 100644
index 000000000000..ea0eed6e8cf5
--- /dev/null
+++ b/conf/mtab/mtab_ultrix.c
@@ -0,0 +1,119 @@
+/*
+ * Copyright (c) 1997-2014 Erez Zadok
+ * Copyright (c) 1990 Jan-Simon Pendry
+ * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Jan-Simon Pendry at Imperial College, London.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *
+ * File: am-utils/conf/mtab/mtab_ultrix.c
+ *
+ */
+
+/*
+ * Include before config.h to force single definition of gt_names[] here.
+ * This can be done unconditionally since this file is Ultrix specific
+ * anyway and <sys/fs_types.h> is properly protected from multiple inclusion.
+ * - Rainer Orth <ro@TechFak.Uni-Bielefeld.DE>
+ * Hack hack hack. Sigh. -Erez.
+ */
+#include <sys/fs_types.h>
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif /* HAVE_CONFIG_H */
+#include <am_defs.h>
+#include <amu.h>
+
+#ifndef NMOUNT
+# define NMOUNT 20
+#endif /* NMOUNT */
+
+
+static mntent_t *
+mnt_dup(struct fs_data *mp)
+{
+ mntent_t *new_mp = ALLOC(mntent_t);
+
+ new_mp->mnt_fsname = xstrdup(mp->fd_devname);
+ new_mp->mnt_dir = xstrdup(mp->fd_path);
+ if (mp->fd_fstype >= GT_NUMTYPES)
+ mp->fd_fstype = GT_UNKWN;
+ else if (gt_names[mp->fd_fstype] == 0)
+ mp->fd_fstype = GT_UNKWN;
+ new_mp->mnt_type = xstrdup(gt_names[mp->fd_fstype]);
+ new_mp->mnt_opts = xstrdup("unset");
+
+ new_mp->mnt_freq = 0;
+ new_mp->mnt_passno = mp->fd_dev;
+
+ return new_mp;
+}
+
+
+/*
+ * Read a mount table into memory
+ */
+mntlist *
+read_mtab(char *fs, const char *mnttabname)
+{
+ mntlist **mpp, *mhp;
+ /* From: Piete Brooks <pb@cl.cam.ac.uk> */
+ int loc = 0;
+ struct fs_data mountbuffer[NMOUNT], *fs_data;
+ int ret;
+
+ mpp = &mhp;
+ while ((ret = getmountent(&loc, mountbuffer, NMOUNT)) > 0) {
+ for (fs_data = mountbuffer; fs_data < &mountbuffer[ret]; fs_data++) {
+ /*
+ * Allocate a new slot
+ */
+ *mpp = ALLOC(struct mntlist);
+
+ /*
+ * Copy the data returned by getmntent
+ */
+ (*mpp)->mnt = mnt_dup(fs_data);
+
+ /*
+ * Move to next pointer
+ */
+ mpp = &(*mpp)->mnext;
+ }
+ }
+ if (ret < 0) {
+ plog(XLOG_ERROR, "getmountent: %m");
+ return 0;
+ }
+ *mpp = NULL;
+
+ return mhp;
+}