booster: Add fstab parsing support

This commit changes the booster.conf format from a
simple custom format to that of the /etc/fstab.c

See booster_mount(..) for the mount options supported/required
for LD_PRELOADing booster. I'll write a small help doc soon.

This commit also brings in fstab parsing code into libglusterfs
because Darwin libc only supports reading the hardcoded /etc/fstab.

Signed-off-by: Anand V. Avati <avati@amp.gluster.com>

1 files changed, 82 insertions, 0 deletions

diff --git a/libglusterfs/src/glusterfs_fstab.h b/libglusterfs/src/glusterfs_fstab.h
new file mode 100644
index 000000000..5d6c6a77f
--- /dev/null
+++ b/libglusterfs/src/glusterfs_fstab.h
@@ -0,0 +1,82 @@
+/* Utilities for reading/writing fstab, mtab, etc.
+   Copyright (C) 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifndef	GLUSTERFS_FSTAB_MNTENT_H
+#define	GLUSTERFS_FSTAB_MNTENT_H	1
+
+#include <features.h>
+#include <stdio.h>
+#include <paths.h>
+
+
+/* General filesystem types.  */
+#define GF_MNTTYPE_IGNORE	"ignore"	/* Ignore this entry.  */
+#define GF_MNTTYPE_NFS	"nfs"		/* Network file system.  */
+#define GF_MNTTYPE_SWAP	"swap"		/* Swap device.  */
+
+
+/* Generic mount options.  */
+#define GF_MNTOPT_DEFAULTS	"defaults"	/* Use all default options.  */
+#define GF_MNTOPT_RO	        "ro"		/* Read only.  */
+#define GF_MNTOPT_RW	        "rw"		/* Read/write.  */
+#define GF_MNTOPT_SUID	        "suid"		/* Set uid allowed.  */
+#define GF_MNTOPT_NOSUID	"nosuid"	/* No set uid allowed.  */
+#define GF_MNTOPT_NOAUTO	"noauto"	/* Do not auto mount.  */
+
+
+/* Structure describing a mount table entry.  */
+struct glusterfs_mntent
+  {
+    char *mnt_fsname;		/* Device or server for filesystem.  */
+    char *mnt_dir;		/* Directory mounted on.  */
+    char *mnt_type;		/* Type of filesystem: ufs, nfs, etc.  */
+    char *mnt_opts;		/* Comma-separated options for fs.  */
+    int mnt_freq;		/* Dump frequency (in days).  */
+    int mnt_passno;		/* Pass number for `fsck'.  */
+  };
+
+#define GF_MNTENT_BUFSIZE       1024
+typedef struct glusterfs_fstab_handle {
+        FILE *fp;
+        char buf[GF_MNTENT_BUFSIZE];
+        struct glusterfs_mntent tmpent;
+}glusterfs_fstab_t;
+
+
+/* Prepare to begin reading and/or writing mount table entries from the
+   beginning of FILE.  MODE is as for `fopen'.  */
+extern glusterfs_fstab_t *glusterfs_fstab_init (const char *file,
+                                                const char *mode);
+
+extern struct glusterfs_mntent *glusterfs_fstab_getent (glusterfs_fstab_t *h);
+
+/* Write the mount table entry described by MNT to STREAM.
+   Return zero on success, nonzero on failure.  */
+extern int glusterfs_fstab_addent (glusterfs_fstab_t *h,
+		                   const struct glusterfs_mntent *mnt);
+
+/* Close a stream opened with `glusterfs_fstab_init'.  */
+extern int glusterfs_fstab_close (glusterfs_fstab_t *h);
+
+/* Search MNT->mnt_opts for an option matching OPT.
+   Returns the address of the substring, or null if none found.  */
+extern char *glusterfs_fstab_hasoption (const struct glusterfs_mntent *mnt,
+                                        const char *opt);
+
+#endif