| /* Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /* |
| * This file will include OS specific functions which are not inlineable. |
| * Any inlineable functions should be defined in os-inline.c instead. |
| */ |
| |
| #ifdef _OSD_POSIX |
| |
| #include "os.h" |
| |
| #include "httpd.h" |
| #include "http_config.h" |
| #include "http_log.h" |
| #include "apr_lib.h" |
| |
| #define USER_LEN 8 |
| |
| typedef enum |
| { |
| bs2_unknown, /* not initialized yet. */ |
| bs2_noFORK, /* no fork() because -X flag was specified */ |
| bs2_FORK, /* only fork() because uid != 0 */ |
| bs2_UFORK /* Normally, ufork() is used to switch identities. */ |
| } bs2_ForkType; |
| |
| static bs2_ForkType forktype = bs2_unknown; |
| |
| |
| static void ap_str_toupper(char *str) |
| { |
| while (*str) { |
| *str = apr_toupper(*str); |
| ++str; |
| } |
| } |
| |
| /* Determine the method for forking off a child in such a way as to |
| * set both the POSIX and BS2000 user id's to the unprivileged user. |
| */ |
| static bs2_ForkType os_forktype(int one_process) |
| { |
| /* have we checked the OS version before? If yes return the previous |
| * result - the OS release isn't going to change suddenly! |
| */ |
| if (forktype == bs2_unknown) { |
| /* not initialized yet */ |
| |
| /* No fork if the one_process option was set */ |
| if (one_process) { |
| forktype = bs2_noFORK; |
| } |
| /* If the user is unprivileged, use the normal fork() only. */ |
| else if (getuid() != 0) { |
| forktype = bs2_FORK; |
| } |
| else |
| forktype = bs2_UFORK; |
| } |
| return forktype; |
| } |
| |
| |
| |
| /* This routine complements the setuid() call: it causes the BS2000 job |
| * environment to be switched to the target user's user id. |
| * That is important if CGI scripts try to execute native BS2000 commands. |
| */ |
| int os_init_job_environment(server_rec *server, const char *user_name, int one_process) |
| { |
| bs2_ForkType type = os_forktype(one_process); |
| |
| /* We can be sure that no change to uid==0 is possible because of |
| * the checks in http_core.c:set_user() |
| */ |
| |
| if (one_process) { |
| |
| type = forktype = bs2_noFORK; |
| |
| ap_log_error(APLOG_MARK, APLOG_ERR, 0, server, |
| "The debug mode of Apache should only " |
| "be started by an unprivileged user!"); |
| return 0; |
| } |
| |
| return 0; |
| } |
| |
| /* BS2000 requires a "special" version of fork() before a setuid() call */ |
| pid_t os_fork(const char *user) |
| { |
| pid_t pid; |
| char username[USER_LEN+1]; |
| |
| switch (os_forktype(0)) { |
| |
| case bs2_FORK: |
| pid = fork(); |
| break; |
| |
| case bs2_UFORK: |
| apr_cpystrn(username, user, sizeof username); |
| |
| /* Make user name all upper case - for some versions of ufork() */ |
| ap_str_toupper(username); |
| |
| pid = ufork(username); |
| if (pid == -1 && errno == EPERM) { |
| ap_log_error(APLOG_MARK, APLOG_EMERG, errno, |
| NULL, "ufork: Possible mis-configuration " |
| "for user %s - Aborting.", user); |
| exit(1); |
| } |
| break; |
| |
| default: |
| pid = 0; |
| break; |
| } |
| |
| return pid; |
| } |
| |
| #else /* _OSD_POSIX */ |
| void bs2000_os_is_not_here() |
| { |
| } |
| #endif /* _OSD_POSIX */ |