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Diffstat (limited to 'libexec/mknetid/parse_group.c')
| -rw-r--r-- | libexec/mknetid/parse_group.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/libexec/mknetid/parse_group.c b/libexec/mknetid/parse_group.c new file mode 100644 index 000000000000..c385dfad5190 --- /dev/null +++ b/libexec/mknetid/parse_group.c @@ -0,0 +1,151 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * Copyright (c) 1989, 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. 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. + */ + +/* + * This is a slightly modified chunk of getgrent(3). All the YP support + * and unneeded functions have been stripped out. + */ + +#include <sys/types.h> +#include <grp.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +FILE *_gr_fp; +static struct group _gr_group; +static int _gr_stayopen; +static int grscan(int, int); +static int start_gr(void); + +#define MAXGRP 200 +static char *members[MAXGRP]; +#define MAXLINELENGTH 1024 +static char line[MAXLINELENGTH]; + +struct group * +_getgrent(void) +{ + if (!_gr_fp && !start_gr()) { + return NULL; + } + + + if (!grscan(0, 0)) + return(NULL); + return(&_gr_group); +} + +static int +start_gr(void) +{ + return 1; +} + +int +_setgroupent(int stayopen) +{ + if (!start_gr()) + return(0); + _gr_stayopen = stayopen; + return(1); +} + +int +_setgrent(void) +{ + return(_setgroupent(0)); +} + +void +_endgrent(void) +{ + if (_gr_fp) { + (void)fclose(_gr_fp); + _gr_fp = NULL; + } +} + +static int +grscan(int search, int gid) +{ + char *cp, **m; + char *bp; + for (;;) { + if (!fgets(line, sizeof(line), _gr_fp)) + return(0); + bp = line; + /* skip lines that are too big */ + if (!strchr(line, '\n')) { + int ch; + + while ((ch = getc(_gr_fp)) != '\n' && ch != EOF) + ; + continue; + } + if ((_gr_group.gr_name = strsep(&bp, ":\n")) == NULL) + break; + if (_gr_group.gr_name[0] == '+') + continue; + if ((_gr_group.gr_passwd = strsep(&bp, ":\n")) == NULL) + break; + if (!(cp = strsep(&bp, ":\n"))) + continue; + _gr_group.gr_gid = atoi(cp); + if (search && _gr_group.gr_gid != gid) + continue; + cp = NULL; + if (bp == NULL) /* !! Must check for this! */ + break; + for (m = _gr_group.gr_mem = members;; bp++) { + if (m == &members[MAXGRP - 1]) + break; + if (*bp == ',') { + if (cp) { + *bp = '\0'; + *m++ = cp; + cp = NULL; + } + } else if (*bp == '\0' || *bp == '\n' || *bp == ' ') { + if (cp) { + *bp = '\0'; + *m++ = cp; + } + break; + } else if (cp == NULL) + cp = bp; + } + *m = NULL; + return(1); + } + /* NOTREACHED */ + return (0); +} |