X-Git-Url: http://git.csclub.uwaterloo.ca/?p=kopensolaris-gnu%2Fglibc.git;a=blobdiff_plain;f=misc%2Ffstab.c;h=754ea1343ab57701a309fbed142ae3927b696ee8;hp=48e53521f10aa6dc33e8c2440333324ad0d28322;hb=059ba87bf79a16839267d7aacdbdfbadcebacb71;hpb=763d070500275efe86057d5a6da3907a8069e4f7;ds=sidebyside diff --git a/misc/fstab.c b/misc/fstab.c index 48e53521f1..754ea1343a 100644 --- a/misc/fstab.c +++ b/misc/fstab.c @@ -1,202 +1,194 @@ -/* - * 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. - */ - -#if defined(LIBC_SCCS) && !defined(lint) -static char sccsid[] = "@(#)fstab.c 8.1 (Berkeley) 6/4/93"; -#endif /* LIBC_SCCS and not lint */ - -#include +/* Copyright (C) 1995, 1996, 1997, 1998, 2000 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 +#include #include #include #include -#include +#include -static FILE *_fs_fp; -static struct fstab _fs_fstab; +#define BUFFER_SIZE 0x1fc0 -static error __P((int)); -static fstabscan __P((void)); +struct fstab_state +{ + FILE *fs_fp; + char *fs_buffer; + struct mntent fs_mntres; + struct fstab fs_ret; +}; -static -fstabscan() +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) { - 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 */ + return fstab_init (1) != NULL; } + struct fstab * -getfsent() +getfsent (void) { - if (!_fs_fp && !setfsent() || !fstabscan()) - return((struct fstab *)NULL); - return(&_fs_fstab); + struct fstab_state *state; + + state = fstab_init (0); + if (state == NULL) + return NULL; + if (fstab_fetch (state) == NULL) + return NULL; + return fstab_convert (state); } + struct fstab * -getfsspec(name) - register const char *name; +getfsspec (name) + const char *name; { - if (setfsent()) - while (fstabscan()) - if (!strcmp(_fs_fstab.fs_spec, name)) - return(&_fs_fstab); - return((struct fstab *)NULL); + struct fstab_state *state; + struct mntent *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 (name) + const char *name; { - if (setfsent()) - while (fstabscan()) - if (!strcmp(_fs_fstab.fs_file, name)) - return(&_fs_fstab); - return((struct fstab *)NULL); + struct fstab_state *state; + struct mntent *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; } -setfsent() + +void +endfsent () { - if (_fs_fp) { - rewind(_fs_fp); - return(1); - } - if (_fs_fp = fopen(_PATH_FSTAB, "r")) - return(1); - error(errno); - return(0); + struct fstab_state *state; + + state = &fstab_state; + if (state->fs_fp != NULL) + { + (void) __endmntent (state->fs_fp); + state->fs_fp = NULL; + } } -void -endfsent() + +static struct fstab_state * +fstab_init (int opt_rewind) +{ + 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 + { + 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) { - if (_fs_fp) { - (void)fclose(_fs_fp); - _fs_fp = NULL; - } + return __getmntent_r (state->fs_fp, &state->fs_mntres, + state->fs_buffer, BUFFER_SIZE); } -static -error(err) - int err; + +static struct fstab * +fstab_convert (struct fstab_state *state) { - 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); + 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. */ +static void +__attribute__ ((unused)) +fstab_free (void) +{ + char *buffer; + + buffer = fstab_state.fs_buffer; + if (buffer != NULL) + free ((void *) buffer); +} + +text_set_element (__libc_subfreeres, fstab_free);