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Diffstat (limited to 'usr.bin/at/privs.c')
| -rw-r--r-- | usr.bin/at/privs.c | 104 |
1 files changed, 0 insertions, 104 deletions
diff --git a/usr.bin/at/privs.c b/usr.bin/at/privs.c deleted file mode 100644 index 1b7e12d..0000000 --- a/usr.bin/at/privs.c +++ /dev/null @@ -1,104 +0,0 @@ -/* $NetBSD: privs.c,v 1.3 2018/02/25 23:48:16 htodd Exp $ */ - -/* - * privs.c - privileged operations - * Copyright (C) 1993 Thomas Koenig - * - * 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. The name of the author(s) may not be used to endorse or promote - * products derived from this software without specific prior written - * permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``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 AUTHOR(S) 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, WETHER 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. - * - * From: OpenBSD: privs.h,v 1.4 1997/03/01 23:40:12 millert Exp - */ - -#include <unistd.h> - -#include "privs.h" - -/* - * Used by: usr.bin/at - * Used by: libexec/atrun - */ - -/* - * Relinquish privileges temporarily for a setuid or setgid program - * with the option of getting them back later. This is done by - * using POSIX saved user and groups ids. Call RELINQUISH_PRIVS once - * at the beginning of the main program. This will cause all operations - * to be executed with the real userid. When you need the privileges - * of the setuid/setgid invocation, call PRIV_START; when you no longer - * need it, call PRIV_END. Note that it is an error to call PRIV_START - * and not PRIV_END within the same function. - * - * Use RELINQUISH_PRIVS_ROOT(a,b) if your program started out running - * as root, and you want to drop back the effective userid to a - * and the effective group id to b, with the option to get them back - * later. - * - * Problems: Do not use return between PRIV_START and PRIV_END; this - * will cause the program to continue running in an unprivileged - * state. - * - * It is NOT safe to call exec(), system() or popen() with a user- - * supplied program (i.e. without carefully checking PATH and any - * library load paths) with relinquished privileges; the called program - * can acquire them just as easily. Set both effective and real userid - * to the real userid before calling any of them. - */ - -uid_t real_uid, effective_uid; -gid_t real_gid, effective_gid; - -void -privs_enter(void) -{ - if (seteuid(effective_uid) == -1) - privs_fail("Cannot get user privs"); - if (setegid(effective_gid) == -1) - privs_fail("Cannot get group privs"); -} - -void -privs_exit(void) -{ - if (setegid(real_gid) == -1) - privs_fail("Cannot relinquish group privs"); - if (seteuid(real_uid) == -1) - privs_fail("Cannot relinquish user privs"); -} - -void -privs_relinquish(void) -{ - real_uid = getuid(); - effective_uid = geteuid(); - real_gid = getgid(); - effective_gid = getegid(); - privs_exit(); -} - -void -privs_relinquish_root(uid_t ruid, gid_t rgid) -{ - real_uid = ruid; - real_gid = rgid; - effective_uid = geteuid(); - effective_gid = getegid(); - privs_exit(); -} |