diff options
Diffstat (limited to 'lib/libc/gen/initgroups.c')
-rw-r--r-- | lib/libc/gen/initgroups.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/lib/libc/gen/initgroups.c b/lib/libc/gen/initgroups.c new file mode 100644 index 000000000000..a1a7d92250e2 --- /dev/null +++ b/lib/libc/gen/initgroups.c @@ -0,0 +1,85 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * Copyright (c) 1983, 1993 + * The Regents of the University of California. All rights reserved. + * Copyright (c) 2025 The FreeBSD Foundation + * + * Portions of this software were developed by Olivier Certner + * <olce@FreeBSD.org> at Kumacom SARL under sponsorship from the FreeBSD + * Foundation. + * + * 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. + */ + +/* For __sym_compat(). */ +#include <sys/cdefs.h> + +#include <errno.h> +#include <stdlib.h> +#include <unistd.h> + +/* For freebsd14_setgroups(). */ +#include "gen-compat.h" + +static int +initgroups_impl(const char *uname, gid_t agroup, + int (*setgroups)(int, const gid_t *)) +{ + gid_t *groups; + long ngroups_max; + int ngroups, ret; + + /* + * Provide space for one group more than possible to allow setgroups() + * to fail and set 'errno' in case we get back more than {NGROUPS_MAX} + + * 1 groups. + */ + ngroups_max = sysconf(_SC_NGROUPS_MAX) + 2; + groups = malloc(sizeof(*groups) * ngroups_max); + if (groups == NULL) + return (-1); /* malloc() set 'errno'. */ + + ngroups = (int)ngroups_max; + (void)getgrouplist(uname, agroup, groups, &ngroups); + ret = (*setgroups)(ngroups, groups); + + free(groups); + return (ret); /* setgroups() set 'errno'. */ +} + +int +initgroups(const char *uname, gid_t agroup) +{ + return (initgroups_impl(uname, agroup, setgroups)); +} + +int +freebsd14_initgroups(const char *uname, gid_t agroup) +{ + return (initgroups_impl(uname, agroup, freebsd14_setgroups)); +} + +__sym_compat(initgroups, freebsd14_initgroups, FBSD_1.0); |