b3608ae18f
The index() and rindex() functions were marked LEGACY in the 2001 revision of POSIX and were subsequently removed from the 2008 revision. The strchr() and strrchr() functions are part of the C standard. This makes the source code a lot more consistent, as most of these C files also call into other str*() routines. In fact, about a dozen already perform strchr() calls.
162 lines
3.9 KiB
C
162 lines
3.9 KiB
C
/*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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#if 0
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static const char sccsid[] = "@(#)getgrent.c 8.2 (Berkeley) 3/21/94";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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/*
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* This is a slightly modified chunk of getgrent(3). All the YP support
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* and unneeded functions have been stripped out.
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*/
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#include <sys/types.h>
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#include <grp.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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FILE *_gr_fp;
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static struct group _gr_group;
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static int _gr_stayopen;
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static int grscan(int, int);
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static int start_gr(void);
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#define MAXGRP 200
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static char *members[MAXGRP];
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#define MAXLINELENGTH 1024
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static char line[MAXLINELENGTH];
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struct group *
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_getgrent(void)
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{
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if (!_gr_fp && !start_gr()) {
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return NULL;
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}
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if (!grscan(0, 0))
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return(NULL);
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return(&_gr_group);
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}
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static int
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start_gr(void)
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{
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return 1;
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}
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int
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_setgroupent(int stayopen)
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{
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if (!start_gr())
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return(0);
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_gr_stayopen = stayopen;
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return(1);
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}
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int
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_setgrent(void)
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{
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return(_setgroupent(0));
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}
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void
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_endgrent(void)
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{
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if (_gr_fp) {
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(void)fclose(_gr_fp);
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_gr_fp = NULL;
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}
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}
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static int
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grscan(int search, int gid)
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{
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char *cp, **m;
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char *bp;
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for (;;) {
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if (!fgets(line, sizeof(line), _gr_fp))
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return(0);
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bp = line;
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/* skip lines that are too big */
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if (!strchr(line, '\n')) {
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int ch;
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while ((ch = getc(_gr_fp)) != '\n' && ch != EOF)
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;
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continue;
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}
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if ((_gr_group.gr_name = strsep(&bp, ":\n")) == NULL)
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break;
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if (_gr_group.gr_name[0] == '+')
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continue;
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if ((_gr_group.gr_passwd = strsep(&bp, ":\n")) == NULL)
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break;
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if (!(cp = strsep(&bp, ":\n")))
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continue;
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_gr_group.gr_gid = atoi(cp);
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if (search && _gr_group.gr_gid != gid)
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continue;
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cp = NULL;
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if (bp == NULL) /* !! Must check for this! */
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break;
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for (m = _gr_group.gr_mem = members;; bp++) {
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if (m == &members[MAXGRP - 1])
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break;
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if (*bp == ',') {
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if (cp) {
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*bp = '\0';
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*m++ = cp;
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cp = NULL;
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}
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} else if (*bp == '\0' || *bp == '\n' || *bp == ' ') {
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if (cp) {
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*bp = '\0';
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*m++ = cp;
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}
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break;
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} else if (cp == NULL)
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cp = bp;
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}
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*m = NULL;
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return(1);
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}
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/* NOTREACHED */
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return (0);
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}
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