diff options
Diffstat (limited to 'misc/fstab.c')
| -rw-r--r-- | misc/fstab.c | 260 |
1 files changed, 82 insertions, 178 deletions
diff --git a/misc/fstab.c b/misc/fstab.c index ac59cab861..c3c27df6ef 100644 --- a/misc/fstab.c +++ b/misc/fstab.c @@ -1,205 +1,109 @@ -/* - * Copyright (c) 1980, 1988, 1993 - * The Regents of the University of California. All rights reserved. - * - * 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. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * 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 - * 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. - */ +/* +Copyright (C) 1995 Free Software Foundation, Inc. +This file is part of the GNU C Library. -#if defined(LIBC_SCCS) && !defined(lint) -static char sccsid[] = "@(#)fstab.c 8.1 (Berkeley) 6/4/93"; -#endif /* LIBC_SCCS and not lint */ +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. -#include <errno.h> -#include <fstab.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> +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. -#ifndef EFTYPE -#define EFTYPE EINVAL -#endif +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., 675 Mass Ave, +Cambridge, MA 02139, USA. */ -static FILE *_fs_fp; -static struct fstab _fs_fstab; +#include <fstab.h> +#include <mntent.h> +#include <stdio.h> -static void error __P((int)); +static FILE *fstab; -static int -fstabscan __P((void)) +static FILE * +fstab_stream (void) { - register char *cp; -#define MAXLINELENGTH 1024 - static char line[MAXLINELENGTH]; - char subline[MAXLINELENGTH]; - int typexx; - - for (;;) { - if (!(cp = fgets(line, sizeof(line), _fs_fp))) - return(0); -/* OLD_STYLE_FSTAB */ - if (!strpbrk(cp, " \t")) { - _fs_fstab.fs_spec = strtok(cp, ":\n"); - _fs_fstab.fs_file = strtok((char *)NULL, ":\n"); - _fs_fstab.fs_type = strtok((char *)NULL, ":\n"); - if (_fs_fstab.fs_type) { - if (!strcmp(_fs_fstab.fs_type, FSTAB_XX)) - continue; - _fs_fstab.fs_mntops = _fs_fstab.fs_type; - _fs_fstab.fs_vfstype = - strcmp(_fs_fstab.fs_type, FSTAB_SW) ? - "ufs" : "swap"; - if (cp = strtok((char *)NULL, ":\n")) { - _fs_fstab.fs_freq = atoi(cp); - if (cp = strtok((char *)NULL, ":\n")) { - _fs_fstab.fs_passno = atoi(cp); - return(1); - } - } - } - goto bad; - } -/* OLD_STYLE_FSTAB */ - _fs_fstab.fs_spec = strtok(cp, " \t\n"); - if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') - continue; - _fs_fstab.fs_file = strtok((char *)NULL, " \t\n"); - _fs_fstab.fs_vfstype = strtok((char *)NULL, " \t\n"); - _fs_fstab.fs_mntops = strtok((char *)NULL, " \t\n"); - if (_fs_fstab.fs_mntops == NULL) - goto bad; - _fs_fstab.fs_freq = 0; - _fs_fstab.fs_passno = 0; - if ((cp = strtok((char *)NULL, " \t\n")) != NULL) { - _fs_fstab.fs_freq = atoi(cp); - if ((cp = strtok((char *)NULL, " \t\n")) != NULL) - _fs_fstab.fs_passno = atoi(cp); - } - strcpy(subline, _fs_fstab.fs_mntops); - for (typexx = 0, cp = strtok(subline, ","); cp; - cp = strtok((char *)NULL, ",")) { - if (strlen(cp) != 2) - continue; - if (!strcmp(cp, FSTAB_RW)) { - _fs_fstab.fs_type = FSTAB_RW; - break; - } - if (!strcmp(cp, FSTAB_RQ)) { - _fs_fstab.fs_type = FSTAB_RQ; - break; - } - if (!strcmp(cp, FSTAB_RO)) { - _fs_fstab.fs_type = FSTAB_RO; - break; - } - if (!strcmp(cp, FSTAB_SW)) { - _fs_fstab.fs_type = FSTAB_SW; - break; - } - if (!strcmp(cp, FSTAB_XX)) { - _fs_fstab.fs_type = FSTAB_XX; - typexx++; - break; - } - } - if (typexx) - continue; - if (cp != NULL) - return(1); - -bad: /* no way to distinguish between EOF and syntax error */ - error(EFTYPE); - } - /* NOTREACHED */ + if (! fstab) + fstab = setmntent (_PATH_FSTAB, "r"); + return fstab; } -struct fstab * -getfsent() +int +setfsent (void) { - if (!_fs_fp && !setfsent() || !fstabscan()) - return((struct fstab *)NULL); - return(&_fs_fstab); + if (fstab) + { + rewind (fstab); + return 1; + } + else + fstab = setmntent (_PATH_FSTAB, "r"); + return fstab ? 0 : 1; } -struct fstab * -getfsspec(name) - register const char *name; +static struct fstab * +mnt2fs (struct mntent *m) { - if (setfsent()) - while (fstabscan()) - if (!strcmp(_fs_fstab.fs_spec, name)) - return(&_fs_fstab); - return((struct fstab *)NULL); + static struct fstab f; + 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 * -getfsfile(name) - register const char *name; +getfsent (void) { - if (setfsent()) - while (fstabscan()) - if (!strcmp(_fs_fstab.fs_file, name)) - return(&_fs_fstab); - return((struct fstab *)NULL); + FILE *s = fstab_stream (); + + if (! s) + return NULL; + + return mnt2fs (getmntent (s)); } -setfsent() +struct fstab * +getfsspec (name) + register const char *name; { - if (_fs_fp) { - rewind(_fs_fp); - return(1); - } - if (_fs_fp = fopen(_PATH_FSTAB, "r")) - return(1); - error(errno); - return(0); + struct mntent *m; + if (setfsent ()) + while (m = getmntent (fstab)) + if (!strcmp (m->mnt_fsname, name)) + return mnt2fs (m); + return NULL; } -void -endfsent() +struct fstab * +getfsfile (name) + register const char *name; { - if (_fs_fp) { - (void)fclose(_fs_fp); - _fs_fp = NULL; - } + struct mntent *m; + if (setfsent ()) + while (m = getmntent (fstab)) + if (!strcmp (m->mnt_dir, name)) + return mnt2fs (m); + return NULL; } -static void -error(err) - int err; +void +endfsent () { - char *p; - - (void)write(STDERR_FILENO, "fstab: ", 7); - (void)write(STDERR_FILENO, _PATH_FSTAB, sizeof(_PATH_FSTAB) - 1); - (void)write(STDERR_FILENO, ": ", 1); - p = strerror(err); - (void)write(STDERR_FILENO, p, strlen(p)); - (void)write(STDERR_FILENO, "\n", 1); + if (fstab) + { + (void) endmntent (fstab); + fstab = NULL; + } } |