diff options
Diffstat (limited to 'misc')
| -rw-r--r-- | misc/Makefile | 4 | ||||
| -rw-r--r-- | misc/fstab.c | 260 | ||||
| -rw-r--r-- | misc/mntent.c | 111 | ||||
| -rw-r--r-- | misc/mntent.h | 77 |
4 files changed, 272 insertions, 180 deletions
diff --git a/misc/Makefile b/misc/Makefile index 53489c68cd..c626dd7a33 100644 --- a/misc/Makefile +++ b/misc/Makefile @@ -25,7 +25,7 @@ subdir := misc headers := sys/uio.h sys/ioctl.h sys/ptrace.h ioctls.h sys/file.h \ a.out.h nlist.h stab.h stab.def sgtty.h sys/dir.h sys/cdefs.h \ ttyent.h syscall.h syslog.h sys/syslog.h paths.h sys/reboot.h \ - sys/mman.h sys/param.h fstab.h search.h utmp.h + sys/mman.h sys/param.h fstab.h mntent.h search.h utmp.h routines := brk sbrk sstk ioctl \ readv writev \ @@ -42,7 +42,7 @@ routines := brk sbrk sstk ioctl \ ualarm usleep \ gtty stty \ ptrace \ - nlist fstab \ + nlist fstab mntent \ utimes \ truncate ftruncate \ chflags fchflags \ 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; + } } diff --git a/misc/mntent.c b/misc/mntent.c new file mode 100644 index 0000000000..42c20817ba --- /dev/null +++ b/misc/mntent.c @@ -0,0 +1,111 @@ +/* Utilities for reading/writing fstab, mtab, etc. +Copyright (C) 1995 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. + +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. + +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. */ + +#include <mntent.h> +#include <stdio.h> +#include <string.h> + +/* Prepare to begin reading and/or writing mount table entries from the + beginning of FILE. MODE is as for `fopen'. */ +FILE * +setmntent (const char *file, const char *mode) +{ + return fopen (file, mode); +} + +/* Close a stream opened with `setmntent'. */ +int +endmntent (FILE *stream) +{ + return fclose (stream); +} + + +/* 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 mntent * +getmntent (FILE *stream) +{ + static char *buf; + static size_t bufsiz; + static struct mntent m; + char *head; + + do + { + if (getline (&buf, &bufsiz, stream) < 0) + return NULL; + + head = buf; + } while (head[0] == '#'); /* Skip comment lines. */ + + m.mnt_fsname = strsep (&head, " \t") ?: (char *) ""; + m.mnt_dir = strsep (&head, " \t") ?: (char *) ""; + m.mnt_type = strsep (&head, " \t") ?: (char *) ""; + m.mnt_opts = strsep (&head, " \t") ?: (char *) ""; + switch (sscanf (head, "%d %d\n", &m.mnt_freq, &m.mnt_passno)) + { + case 0: + m.mnt_freq = 0; + case 1: + m.mnt_passno = 0; + case 2: + } + + return &m; +} + +/* Write the mount table entry described by MNT to STREAM. + Return zero on success, nonzero on failure. */ +int +addmntent (FILE *stream, const struct mntent *mnt) +{ + return (fprintf (stream, "%s %s %s %s %d %d\n", + mnt->mnt_fsname, + mnt->mnt_dir, + mnt->mnt_type, + mnt->mnt_opts, + mnt->mnt_freq, + mnt->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 * +hasmntopt (const struct 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 (rest, ','); + } + + return NULL; +} + diff --git a/misc/mntent.h b/misc/mntent.h new file mode 100644 index 0000000000..99fa56ded4 --- /dev/null +++ b/misc/mntent.h @@ -0,0 +1,77 @@ +/* <mntent.h> -- Utilities for reading/writing fstab, mtab, etc. +Copyright (C) 1995 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. + +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. + +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. */ + +#ifndef _MNTENT_H +#define _MNTENT_H 1 + +#include <features.h> +#define __need_FILE +#include <stdio.h> + + +/* File listing canonical interesting mount points. */ +#define _PATH_MNTTAB "/etc/fstab" +#define MNTTAB _PATH_MNTTAB /* Deprecated alias. */ + +/* File listing currently active mount points. */ +#define _PATH_MOUNTED "/var/run/mtab" +#define MOUNTED _PATH_MOUNTED /* Deprecated alias. */ + + +__BEGIN_DECLS + +/* Structure describing a mount table entry. */ +struct 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'. */ + }; + + +/* Prepare to begin reading and/or writing mount table entries from the + beginning of FILE. MODE is as for `fopen'. */ +extern FILE *setmntent __P ((__const char *__file, + __const char *__mode)); + +/* 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). */ +extern struct mntent *getmntent __P ((FILE *__stream)); + +/* Write the mount table entry described by MNT to STREAM. + Return zero on success, nonzero on failure. */ +extern int addmntent __P ((FILE *__stream, + __const struct mntent *__mnt)); + +/* Close a stream opened with `setmntent'. */ +extern int endmntent __P ((FILE *__stream)); + +/* Search MNT->mnt_opts for an option matching OPT. + Returns the address of the substring, or null if none found. */ +extern char *hasmntopt __P ((__const struct mntent *__mnt, + __const char *__opt)); + + +__END_DECLS + +#endif /* mntent.h */ |