diff options
Diffstat (limited to 'contrib/opie/libmissing/initgroups.c')
| -rw-r--r-- | contrib/opie/libmissing/initgroups.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/contrib/opie/libmissing/initgroups.c b/contrib/opie/libmissing/initgroups.c new file mode 100644 index 000000000000..2306a0c2e922 --- /dev/null +++ b/contrib/opie/libmissing/initgroups.c @@ -0,0 +1,129 @@ +/* initgroups.c: Replacement for the initgroups() function. + +%%% portions-copyright-cmetz +Portions of this software are Copyright 1996 by Craig Metz, All Rights +Reserved. The Inner Net License Version 2 applies to these portions of +the software. +You should have received a copy of the license with this software. If +you didn't get a copy, you may request one from <license@inner.net>. + + History: + + Modified by cmetz for OPIE 2.2. Removed useless string. + Ifdef around headers. Use FUNCTION declarations. + Not everyone has multiple groups. Work around + lack of NGROUPS. + Originally from 4.3BSD Net/2. +*/ +/* + * Copyright (c) 1983 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. + */ + +/* + * initgroups + */ +#include "opie_cfg.h" + +#if HAVE_SYS_PARAM_H +#include <sys/param.h> +#endif /* HAVE_SYS_PARAM_H */ +#include <stdio.h> +#if HAVE_STRING_H +#include <string.h> +#endif /* HAVE_STRING */ +#if HAVE_UNISTD_H +#include <unistd.h> +#endif /* HAVE_UNISTD_H */ +#include <grp.h> + +#include "opie.h" + +struct group *getgrent(); + +int initgroups FUNCTION((uname, agroup), const char *uname AND int agroup) +{ +#if HAVE_SETGROUPS && HAVE_GETGROUPS +#if NGROUPS + int groups[NGROUPS]; +#else /* NGROUPS */ +#define STARTING_NGROUPS 32 + int groups[STARTING_NGROUPS]; +#endif /* NGROUPS */ + int ngroups; + register struct group *grp; + register int i; + + /* + * If installing primary group, duplicate it; + * the first element of groups is the effective gid + * and will be overwritten when a setgid file is executed. + */ + if (agroup >= 0) { + groups[ngroups++] = agroup; + groups[ngroups++] = agroup; + } + setgrent(); + while (grp = getgrent()) { + if (grp->gr_gid == agroup) + continue; + for (i = 0; grp->gr_mem[i]; i++) + if (!strcmp(grp->gr_mem[i], uname)) { +#if NGROUPS + if (ngroups == NGROUPS) { +#else /* NGROUPS */ + if (ngroups == STARTING_NGROUPS) { +#endif /* NGROUPS */ +fprintf(stderr, "initgroups: %s is in too many groups\n", uname); + goto toomany; + } + groups[ngroups++] = grp->gr_gid; + } + } +toomany: + endgrent(); +#if NGROUPS + if (setgroups(ngroups, groups) < 0) { + perror("setgroups"); + return (-1); + } +#else /* NGROUPS */ + ngroups++; + do { + if ((i = setgroups(--ngroups, groups) < 0) && (i != EINVAL)) { + perror("setgroups"); + return (-1); + } + } while ((i < 0) && (ngroups > 0)); +#endif /* NGROUPS */ +#endif /* HAVE_SETGROUPS && HAVE_GETGROUPS */ + return (0); +} |