diff options
Diffstat (limited to 'libglusterfs/src/glusterfs_fstab.c')
| -rw-r--r-- | libglusterfs/src/glusterfs_fstab.c | 309 |
1 files changed, 0 insertions, 309 deletions
diff --git a/libglusterfs/src/glusterfs_fstab.c b/libglusterfs/src/glusterfs_fstab.c deleted file mode 100644 index b21197b1d..000000000 --- a/libglusterfs/src/glusterfs_fstab.c +++ /dev/null @@ -1,309 +0,0 @@ -/* Utilities for reading/writing fstab, mtab, etc. - Copyright (C) 1995-2000, 2001, 2002, 2003, 2006 - 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. */ - -#include <alloca.h> -#include <stdio.h> -#include <stdio_ext.h> -#include <string.h> -#include <sys/types.h> -#include "glusterfs_fstab.h" -#include <stdlib.h> - -/* Prepare to begin reading and/or writing mount table entries from the - beginning of FILE. MODE is as for `fopen'. */ -glusterfs_fstab_t * -glusterfs_fstab_init (const char *file, const char *mode) -{ - glusterfs_fstab_t *handle = NULL; - /* Extend the mode parameter with "c" to disable cancellation in the - I/O functions. */ - size_t modelen = strlen (mode); - char newmode[modelen + 2]; - memcpy (mempcpy (newmode, mode, modelen), "c", 2); - - handle = calloc (1, sizeof (glusterfs_fstab_t)); - if (!handle) - goto out; - - FILE *result = fopen (file, newmode); - if (result != NULL) { - /* We do the locking ourselves. */ - __fsetlocking (result, FSETLOCKING_BYCALLER); - handle->fp = result; - } else { - free (handle); - handle = NULL; - } - -out: - - return handle; -} - -int -glusterfs_fstab_close (glusterfs_fstab_t *h) -{ - if (!h) - return -1; - - if (h->fp) - fclose (h->fp); - - return 0; -} - -/* Since the values in a line are separated by spaces, a name cannot - contain a space. Therefore some programs encode spaces in names - by the strings "\040". We undo the encoding when reading an entry. - The decoding happens in place. */ -static char * -decode_name (char *buf) -{ - char *rp = buf; - char *wp = buf; - - do - if (rp[0] == '\\' && rp[1] == '0' && rp[2] == '4' && rp[3] == '0') - { - /* \040 is a SPACE. */ - *wp++ = ' '; - rp += 3; - } - else if (rp[0] == '\\' && rp[1] == '0' && rp[2] == '1' && rp[3] == '1') - { - /* \011 is a TAB. */ - *wp++ = '\t'; - rp += 3; - } - else if (rp[0] == '\\' && rp[1] == '0' && rp[2] == '1' && rp[3] == '2') - { - /* \012 is a NEWLINE. */ - *wp++ = '\n'; - rp += 3; - } - else if (rp[0] == '\\' && rp[1] == '\\') - { - /* We have to escape \\ to be able to represent all characters. */ - *wp++ = '\\'; - rp += 1; - } - else if (rp[0] == '\\' && rp[1] == '1' && rp[2] == '3' && rp[3] == '4') - { - /* \134 is also \\. */ - *wp++ = '\\'; - rp += 3; - } - else - *wp++ = *rp; - while (*rp++ != '\0'); - - return buf; -} - - -/* Read one mount table entry from STREAM. Returns a pointer to storage - reused on the next call, or null for EOF or error (use feof/ferror to - check). */ -struct glusterfs_mntent * -__glusterfs_fstab_getent (FILE *stream, struct glusterfs_mntent *mp, - char *buffer, int bufsiz) -{ - char *cp; - char *head; - - flockfile (stream); - do - { - char *end_ptr; - - if (fgets_unlocked (buffer, bufsiz, stream) == NULL) - { - funlockfile (stream); - return NULL; - } - - end_ptr = strchr (buffer, '\n'); - if (end_ptr != NULL) /* chop newline */ - *end_ptr = '\0'; - else - { - /* Not the whole line was read. Do it now but forget it. */ - char tmp[1024]; - while (fgets_unlocked (tmp, sizeof tmp, stream) != NULL) - if (strchr (tmp, '\n') != NULL) - break; - } - - head = buffer + strspn (buffer, " \t"); - /* skip empty lines and comment lines: */ - } - while (head[0] == '\0' || head[0] == '#'); - - cp = strsep (&head, " \t"); - mp->mnt_fsname = cp != NULL ? decode_name (cp) : (char *) ""; - if (head) - head += strspn (head, " \t"); - cp = strsep (&head, " \t"); - mp->mnt_dir = cp != NULL ? decode_name (cp) : (char *) ""; - if (head) - head += strspn (head, " \t"); - cp = strsep (&head, " \t"); - mp->mnt_type = cp != NULL ? decode_name (cp) : (char *) ""; - if (head) - head += strspn (head, " \t"); - cp = strsep (&head, " \t"); - mp->mnt_opts = cp != NULL ? decode_name (cp) : (char *) ""; - switch (head ? sscanf (head, " %d %d ", &mp->mnt_freq, &mp->mnt_passno) : 0) - { - case 0: - mp->mnt_freq = 0; - case 1: - mp->mnt_passno = 0; - case 2: - break; - } - funlockfile (stream); - - return mp; -} - -struct glusterfs_mntent * -glusterfs_fstab_getent (glusterfs_fstab_t *h) -{ - if (!h) - return NULL; - - if (!h->fp) - return NULL; - - return __glusterfs_fstab_getent (h->fp, &h->tmpent, h->buf, - GF_MNTENT_BUFSIZE); -} - -/* We have to use an encoding for names if they contain spaces or tabs. - To be able to represent all characters we also have to escape the - backslash itself. This "function" must be a macro since we use - `alloca'. */ -#define encode_name(name) \ - do { \ - const char *rp = name; \ - \ - while (*rp != '\0') \ - if (*rp == ' ' || *rp == '\t' || *rp == '\\') \ - break; \ - else \ - ++rp; \ - \ - if (*rp != '\0') \ - { \ - /* In the worst case the length of the string can increase to \ - founr times the current length. */ \ - char *wp; \ - \ - rp = name; \ - name = wp = (char *) alloca (strlen (name) * 4 + 1); \ - \ - do \ - if (*rp == ' ') \ - { \ - *wp++ = '\\'; \ - *wp++ = '0'; \ - *wp++ = '4'; \ - *wp++ = '0'; \ - } \ - else if (*rp == '\t') \ - { \ - *wp++ = '\\'; \ - *wp++ = '0'; \ - *wp++ = '1'; \ - *wp++ = '1'; \ - } \ - else if (*rp == '\n') \ - { \ - *wp++ = '\\'; \ - *wp++ = '0'; \ - *wp++ = '1'; \ - *wp++ = '2'; \ - } \ - else if (*rp == '\\') \ - { \ - *wp++ = '\\'; \ - *wp++ = '\\'; \ - } \ - else \ - *wp++ = *rp; \ - while (*rp++ != '\0'); \ - } \ - } while (0) - - -int -glusterfs_fstab_addent (glusterfs_fstab_t *h, - const struct glusterfs_mntent *mnt) -{ - struct glusterfs_mntent mntcopy = *mnt; - if (!h) - return -1; - - if (!h->fp) - return -1; - - if (fseek (h->fp, 0, SEEK_END)) - return -1; - - /* Encode spaces and tabs in the names. */ - encode_name (mntcopy.mnt_fsname); - encode_name (mntcopy.mnt_dir); - encode_name (mntcopy.mnt_type); - encode_name (mntcopy.mnt_opts); - - return (fprintf (h->fp, "%s %s %s %s %d %d\n", - mntcopy.mnt_fsname, - mntcopy.mnt_dir, - mntcopy.mnt_type, - mntcopy.mnt_opts, - mntcopy.mnt_freq, - mntcopy.mnt_passno) - < 0 ? 1 : 0); -} - - -/* Search MNT->mnt_opts for an option matching OPT. - Returns the address of the substring, or null if none found. */ -char * -glusterfs_fstab_hasoption (const struct glusterfs_mntent *mnt, const char *opt) -{ - const size_t optlen = strlen (opt); - char *rest = mnt->mnt_opts, *p; - - while ((p = strstr (rest, opt)) != NULL) - { - if ((p == rest || p[-1] == ',') - && (p[optlen] == '\0' || p[optlen] == '=' || p[optlen] == ',')) - return p; - - rest = strchr (p, ','); - if (rest == NULL) - break; - ++rest; - } - - return NULL; -} |