2008-01-11 11:57:08 +00:00
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/*
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* Copyright (c) 2004 Iwata <iwata@quasiquote.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <stdio.h>
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2008-02-01 23:55:22 +00:00
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#include <stdlib.h>
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2008-01-11 11:57:08 +00:00
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#include <unistd.h>
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#include <sys/types.h>
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#include <pwd.h>
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#include "sj3serv.h"
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void
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set_priv(const char *title)
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{
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struct passwd *pw;
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if (!chroot_enable)
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return;
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if ((pw = getpwnam(chuser_name)) == NULL) {
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fprintf(stderr, "failed to get user \"%s\"\n", chuser_name);
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fflush(stderr);
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exit(255);
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}
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if (chroot(chroot_dir) != 0) {
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fprintf(stderr, "can't chroot\n");
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fflush(stderr);
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exit(255);
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}
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if (chdir("/") != 0) {
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fprintf(stderr, "can't change directory '/'\n");
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fflush(stderr);
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exit(255);
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}
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if (title != NULL)
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setproctitle("%s %s", pw->pw_name, title);
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/*
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* Drop privileges and clear the group access list
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*/
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if (setgroups(1, &pw->pw_gid) == -1 ||
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setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) == -1 ||
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setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid) == -1) {
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fprintf(stderr, "can't drop privileges\n");
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fflush(stderr);
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exit(255);
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}
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}
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