diff options
Diffstat (limited to 'lib/libc/gen/getgrouplist.c')
| -rw-r--r-- | lib/libc/gen/getgrouplist.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/lib/libc/gen/getgrouplist.c b/lib/libc/gen/getgrouplist.c new file mode 100644 index 0000000..34ab4ea --- /dev/null +++ b/lib/libc/gen/getgrouplist.c @@ -0,0 +1,89 @@ +/* + * Copyright (c) 1991, 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[] = "@(#)getgrouplist.c 8.1 (Berkeley) 6/4/93"; +#endif /* LIBC_SCCS and not lint */ + +/* + * get credential + */ +#include <sys/types.h> +#include <string.h> +#include <grp.h> + +int +getgrouplist(uname, agroup, groups, grpcnt) + const char *uname; + int agroup; + register int *groups; + int *grpcnt; +{ + register struct group *grp; + register struct passwd *pw; + register int i, ngroups; + int ret, maxgroups; + + ret = 0; + ngroups = 0; + maxgroups = *grpcnt; + /* + * When installing primary group, duplicate it; + * the first element of groups is the effective gid + * and will be overwritten when a setgid file is executed. + */ + groups[ngroups++] = agroup; + if (maxgroups > 1) + groups[ngroups++] = agroup; + /* + * Scan the group file to find additional groups. + */ + setgrent(); + while (grp = getgrent()) { + if (grp->gr_gid == agroup) + continue; + if (ngroups >= maxgroups) { + ret = -1; + break; + } + for (i = 0; grp->gr_mem[i]; i++) { + if (!strcmp(grp->gr_mem[i], uname)) { + groups[ngroups++] = grp->gr_gid; + break; + } + } + } + endgrent(); + *grpcnt = ngroups; + return (ret); +} |
