-/* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
+/* Copyright (C) 1995-2019 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 Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
+ 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
- Library General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
#include <fstab.h>
#include <mntent.h>
#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <libc-lock.h>
-static FILE *fstab;
-static struct mntent mntres;
-static char buffer[8192];
+#define BUFFER_SIZE 0x1fc0
-
-static FILE *
-fstab_stream (void)
+struct fstab_state
{
- if (! fstab)
- fstab = setmntent (_PATH_FSTAB, "r");
- return fstab;
-}
+ FILE *fs_fp;
+ char *fs_buffer;
+ struct mntent fs_mntres;
+ struct fstab fs_ret;
+};
+
+static struct fstab_state *fstab_init (int opt_rewind);
+static struct mntent *fstab_fetch (struct fstab_state *state);
+static struct fstab *fstab_convert (struct fstab_state *state);
+
+static struct fstab_state fstab_state;
+
int
setfsent (void)
{
- if (fstab)
- {
- rewind (fstab);
- return 1;
- }
- else
- fstab = setmntent (_PATH_FSTAB, "r");
- return fstab ? 0 : 1;
+ return fstab_init (1) != NULL;
}
-static struct fstab *
-mnt2fs (struct mntent *m)
-{
- static struct fstab f;
-
- if (m == NULL)
- return NULL;
-
- f.fs_spec = m->mnt_fsname;
- f.fs_file = m->mnt_dir;
- f.fs_vfstype = m->mnt_type;
- f.fs_mntops = m->mnt_opts;
- f.fs_type = (hasmntopt (m, FSTAB_RW) ? (char *) FSTAB_RW :
- hasmntopt (m, FSTAB_RQ) ? (char *) FSTAB_RQ :
- hasmntopt (m, FSTAB_RO) ? (char *) FSTAB_RO :
- hasmntopt (m, FSTAB_SW) ? (char *) FSTAB_SW :
- hasmntopt (m, FSTAB_XX) ? (char *) FSTAB_XX :
- (char *) "??");
- f.fs_freq = m->mnt_freq;
- f.fs_passno = m->mnt_passno;
- return &f;
-}
struct fstab *
getfsent (void)
{
- FILE *s = fstab_stream ();
+ struct fstab_state *state;
- if (! s)
+ state = fstab_init (0);
+ if (state == NULL)
return NULL;
-
- return mnt2fs (__getmntent_r (s, &mntres, buffer, sizeof buffer));
+ if (fstab_fetch (state) == NULL)
+ return NULL;
+ return fstab_convert (state);
}
+
struct fstab *
-getfsspec (name)
- register const char *name;
+getfsspec (const char *name)
{
+ struct fstab_state *state;
struct mntent *m;
- if (setfsent ())
- while (m = __getmntent_r (fstab, &mntres, buffer, sizeof buffer))
- if (!strcmp (m->mnt_fsname, name))
- return mnt2fs (m);
+
+ state = fstab_init (1);
+ if (state == NULL)
+ return NULL;
+ while ((m = fstab_fetch (state)) != NULL)
+ if (strcmp (m->mnt_fsname, name) == 0)
+ return fstab_convert (state);
return NULL;
}
+
struct fstab *
-getfsfile (name)
- register const char *name;
+getfsfile (const char *name)
{
+ struct fstab_state *state;
struct mntent *m;
- if (setfsent ())
- while (m = __getmntent_r (fstab, &mntres, buffer, sizeof buffer))
- if (!strcmp (m->mnt_dir, name))
- return mnt2fs (m);
+
+ state = fstab_init (1);
+ if (state == NULL)
+ return NULL;
+ while ((m = fstab_fetch (state)) != NULL)
+ if (strcmp (m->mnt_dir, name) == 0)
+ return fstab_convert (state);
return NULL;
}
+
void
-endfsent ()
+endfsent (void)
+{
+ struct fstab_state *state;
+
+ state = &fstab_state;
+ if (state->fs_fp != NULL)
+ {
+ (void) __endmntent (state->fs_fp);
+ state->fs_fp = NULL;
+ }
+}
+
+
+static struct fstab_state *
+fstab_init (int opt_rewind)
{
- if (fstab)
+ struct fstab_state *state;
+ char *buffer;
+ FILE *fp;
+
+ state = &fstab_state;
+
+ buffer = state->fs_buffer;
+ if (buffer == NULL)
+ {
+ buffer = (char *) malloc (BUFFER_SIZE);
+ if (buffer == NULL)
+ return NULL;
+ state->fs_buffer = buffer;
+ }
+
+ fp = state->fs_fp;
+ if (fp != NULL)
+ {
+ if (opt_rewind)
+ rewind (fp);
+ }
+ else
{
- (void) endmntent (fstab);
- fstab = NULL;
+ fp = __setmntent (_PATH_FSTAB, "r");
+ if (fp == NULL)
+ return NULL;
+ state->fs_fp = fp;
}
+
+ return state;
+}
+
+
+static struct mntent *
+fstab_fetch (struct fstab_state *state)
+{
+ return __getmntent_r (state->fs_fp, &state->fs_mntres,
+ state->fs_buffer, BUFFER_SIZE);
+}
+
+
+static struct fstab *
+fstab_convert (struct fstab_state *state)
+{
+ struct mntent *m;
+ struct fstab *f;
+
+ m = &state->fs_mntres;
+ f = &state->fs_ret;
+
+ f->fs_spec = m->mnt_fsname;
+ f->fs_file = m->mnt_dir;
+ f->fs_vfstype = m->mnt_type;
+ f->fs_mntops = m->mnt_opts;
+ f->fs_type = (__hasmntopt (m, FSTAB_RW) ? FSTAB_RW
+ : __hasmntopt (m, FSTAB_RQ) ? FSTAB_RQ
+ : __hasmntopt (m, FSTAB_RO) ? FSTAB_RO
+ : __hasmntopt (m, FSTAB_SW) ? FSTAB_SW
+ : __hasmntopt (m, FSTAB_XX) ? FSTAB_XX
+ : "??");
+ f->fs_freq = m->mnt_freq;
+ f->fs_passno = m->mnt_passno;
+ return f;
+}
+
+
+/* Make sure the memory is freed if the programs ends while in
+ memory-debugging mode and something actually was allocated. */
+libc_freeres_fn (fstab_free)
+{
+ char *buffer;
+
+ buffer = fstab_state.fs_buffer;
+ free ((void *) buffer);
}