1 /* Utilities for reading/writing fstab, mtab, etc.
2 Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
23 #include <sys/types.h>
26 # define flockfile(s) _IO_flockfile (s)
27 # define funlockfile(s) _IO_funlockfile (s)
30 /* Prepare to begin reading and/or writing mount table entries from the
31 beginning of FILE. MODE is as for `fopen'. */
33 __setmntent (const char *file
, const char *mode
)
35 return fopen (file
, mode
);
37 weak_alias (__setmntent
, setmntent
)
40 /* Close a stream opened with `setmntent'. */
42 __endmntent (FILE *stream
)
44 if (stream
) /* SunOS 4.x allows for NULL stream */
46 return 1; /* SunOS 4.x says to always return 1 */
48 weak_alias (__endmntent
, endmntent
)
51 /* Read one mount table entry from STREAM. Returns a pointer to storage
52 reused on the next call, or null for EOF or error (use feof/ferror to
55 __getmntent_r (FILE *stream
, struct mntent
*mp
, char *buffer
, int bufsiz
)
64 if (fgets_unlocked (buffer
, bufsiz
, stream
) == NULL
)
70 end_ptr
= strchr (buffer
, '\n');
71 if (end_ptr
!= NULL
) /* chop newline */
75 /* Not the whole line was read. Do it now but forget it. */
77 while (fgets_unlocked (tmp
, sizeof tmp
, stream
) != NULL
)
78 if (strchr (tmp
, '\n') != NULL
)
82 head
= buffer
+ strspn (buffer
, " \t");
83 /* skip empty lines and comment lines: */
84 } while (head
[0] == '\0' || head
[0] == '#');
86 mp
->mnt_fsname
= __strsep (&head
, " \t") ?: (char *) "";
88 head
+= strspn (head
, " \t");
89 mp
->mnt_dir
= __strsep (&head
, " \t") ?: (char *) "";
91 head
+= strspn (head
, " \t");
92 mp
->mnt_type
= __strsep (&head
, " \t") ?: (char *) "";
94 head
+= strspn (head
, " \t");
95 mp
->mnt_opts
= __strsep (&head
, " \t") ?: (char *) "";
96 switch (head
? sscanf (head
, " %d %d ", &mp
->mnt_freq
, &mp
->mnt_passno
) : 0)
104 funlockfile (stream
);
108 weak_alias (__getmntent_r
, getmntent_r
)
110 /* Write the mount table entry described by MNT to STREAM.
111 Return zero on success, nonzero on failure. */
113 __addmntent (FILE *stream
, const struct mntent
*mnt
)
115 if (fseek (stream
, 0, SEEK_END
))
118 return (fprintf (stream
, "%s %s %s %s %d %d\n",
127 weak_alias (__addmntent
, addmntent
)
130 /* Search MNT->mnt_opts for an option matching OPT.
131 Returns the address of the substring, or null if none found. */
133 __hasmntopt (const struct mntent
*mnt
, const char *opt
)
135 const size_t optlen
= strlen (opt
);
136 char *rest
= mnt
->mnt_opts
, *p
;
138 while ((p
= strstr (rest
, opt
)) != NULL
)
142 && (p
[optlen
] == '\0' ||
147 rest
= strchr (rest
, ',');
155 weak_alias (__hasmntopt
, hasmntopt
)