diff options
Diffstat (limited to 'rubbos/app/httpd-2.0.64/os/unix/unixd.c')
-rw-r--r-- | rubbos/app/httpd-2.0.64/os/unix/unixd.c | 593 |
1 files changed, 0 insertions, 593 deletions
diff --git a/rubbos/app/httpd-2.0.64/os/unix/unixd.c b/rubbos/app/httpd-2.0.64/os/unix/unixd.c deleted file mode 100644 index 05b6443c..00000000 --- a/rubbos/app/httpd-2.0.64/os/unix/unixd.c +++ /dev/null @@ -1,593 +0,0 @@ -/* 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. - */ - -#include "ap_config.h" -#define CORE_PRIVATE -#include "httpd.h" -#include "http_config.h" -#include "http_main.h" -#include "http_log.h" -#include "unixd.h" -#include "mpm_common.h" -#include "os.h" -#include "ap_mpm.h" -#include "apr_thread_proc.h" -#include "apr_strings.h" -#include "apr_portable.h" -#ifdef HAVE_PWD_H -#include <pwd.h> -#endif -#ifdef HAVE_SYS_RESOURCE_H -#include <sys/resource.h> -#endif -/* XXX */ -#include <sys/stat.h> -#ifdef HAVE_UNISTD_H -#include <unistd.h> -#endif -#ifdef HAVE_GRP_H -#include <grp.h> -#endif -#ifdef HAVE_STRINGS_H -#include <strings.h> -#endif -#ifdef HAVE_SYS_SEM_H -#include <sys/sem.h> -#endif -#ifdef HAVE_SYS_PRCTL_H -#include <sys/prctl.h> -#endif - -unixd_config_rec unixd_config; - -/* Set group privileges. - * - * Note that we use the username as set in the config files, rather than - * the lookup of to uid --- the same uid may have multiple passwd entries, - * with different sets of groups for each. - */ - -static int set_group_privs(void) -{ - if (!geteuid()) { - const char *name; - - /* Get username if passed as a uid */ - - if (unixd_config.user_name[0] == '#') { - struct passwd *ent; - uid_t uid = atoi(&unixd_config.user_name[1]); - - if ((ent = getpwuid(uid)) == NULL) { - ap_log_error(APLOG_MARK, APLOG_ALERT, errno, NULL, - "getpwuid: couldn't determine user name from uid %u, " - "you probably need to modify the User directive", - (unsigned)uid); - return -1; - } - - name = ent->pw_name; - } - else - name = unixd_config.user_name; - -#if !defined(OS2) && !defined(TPF) - /* OS/2 and TPF don't support groups. */ - - /* - * Set the GID before initgroups(), since on some platforms - * setgid() is known to zap the group list. - */ - if (setgid(unixd_config.group_id) == -1) { - ap_log_error(APLOG_MARK, APLOG_ALERT, errno, NULL, - "setgid: unable to set group id to Group %u", - (unsigned)unixd_config.group_id); - return -1; - } - - /* Reset `groups' attributes. */ - - if (initgroups(name, unixd_config.group_id) == -1) { - ap_log_error(APLOG_MARK, APLOG_ALERT, errno, NULL, - "initgroups: unable to set groups for User %s " - "and Group %u", name, (unsigned)unixd_config.group_id); - return -1; - } -#endif /* !defined(OS2) && !defined(TPF) */ - } - return 0; -} - - -AP_DECLARE(int) unixd_setup_child(void) -{ - if (set_group_privs()) { - return -1; - } -#ifdef MPE - /* Only try to switch if we're running as MANAGER.SYS */ - if (geteuid() == 1 && unixd_config.user_id > 1) { - GETPRIVMODE(); - if (setuid(unixd_config.user_id) == -1) { - GETUSERMODE(); - ap_log_error(APLOG_MARK, APLOG_ALERT, errno, NULL, - "setuid: unable to change to uid: %ld", - (long) unixd_config.user_id); - exit(1); - } - GETUSERMODE(); - } -#else - /* Only try to switch if we're running as root */ - if (!geteuid() && ( -#ifdef _OSD_POSIX - os_init_job_environment(server_conf, unixd_config.user_name, one_process) != 0 || -#endif - setuid(unixd_config.user_id) == -1)) { - ap_log_error(APLOG_MARK, APLOG_ALERT, errno, NULL, - "setuid: unable to change to uid: %ld", - (long) unixd_config.user_id); - return -1; - } -#if defined(HAVE_PRCTL) && defined(PR_SET_DUMPABLE) - /* this applies to Linux 2.4+ */ -#ifdef AP_MPM_WANT_SET_COREDUMPDIR - if (ap_coredumpdir_configured) { - if (prctl(PR_SET_DUMPABLE, 1)) { - ap_log_error(APLOG_MARK, APLOG_ALERT, errno, NULL, - "set dumpable failed - this child will not coredump" - " after software errors"); - } - } -#endif -#endif -#endif - return 0; -} - - -AP_DECLARE(const char *) unixd_set_user(cmd_parms *cmd, void *dummy, - const char *arg) -{ - const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); - if (err != NULL) { - return err; - } - - unixd_config.user_name = arg; - unixd_config.user_id = ap_uname2id(arg); -#if !defined (BIG_SECURITY_HOLE) && !defined (OS2) - if (unixd_config.user_id == 0) { - return "Error:\tApache has not been designed to serve pages while\n" - "\trunning as root. There are known race conditions that\n" - "\twill allow any local user to read any file on the system.\n" - "\tIf you still desire to serve pages as root then\n" - "\tadd -DBIG_SECURITY_HOLE to the CFLAGS env variable\n" - "\tand then rebuild the server.\n" - "\tIt is strongly suggested that you instead modify the User\n" - "\tdirective in your httpd.conf file to list a non-root\n" - "\tuser.\n"; - } -#endif - - return NULL; -} - -AP_DECLARE(const char *) unixd_set_group(cmd_parms *cmd, void *dummy, - const char *arg) -{ - const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); - if (err != NULL) { - return err; - } - - unixd_config.group_id = ap_gname2id(arg); - - return NULL; -} - -AP_DECLARE(void) unixd_pre_config(apr_pool_t *ptemp) -{ - apr_finfo_t wrapper; - - unixd_config.user_name = DEFAULT_USER; - unixd_config.user_id = ap_uname2id(DEFAULT_USER); - unixd_config.group_id = ap_gname2id(DEFAULT_GROUP); - - /* Check for suexec */ - unixd_config.suexec_enabled = 0; - if ((apr_stat(&wrapper, SUEXEC_BIN, - APR_FINFO_NORM, ptemp)) != APR_SUCCESS) { - return; - } - -/* since APR 0.9.5 */ -#ifdef APR_USETID - if ((wrapper.protection & APR_USETID) && wrapper.user == 0) { -#endif - unixd_config.suexec_enabled = 1; -#ifdef APR_USETID - } -#endif -} - - -AP_DECLARE(void) unixd_set_rlimit(cmd_parms *cmd, struct rlimit **plimit, - const char *arg, const char * arg2, int type) -{ -#if (defined(RLIMIT_CPU) || defined(RLIMIT_DATA) || defined(RLIMIT_VMEM) || defined(RLIMIT_NPROC) || defined(RLIMIT_AS)) && APR_HAVE_STRUCT_RLIMIT && APR_HAVE_GETRLIMIT - char *str; - struct rlimit *limit; - /* If your platform doesn't define rlim_t then typedef it in ap_config.h */ - rlim_t cur = 0; - rlim_t max = 0; - - *plimit = (struct rlimit *)apr_pcalloc(cmd->pool, sizeof(**plimit)); - limit = *plimit; - if ((getrlimit(type, limit)) != 0) { - *plimit = NULL; - ap_log_error(APLOG_MARK, APLOG_ERR, errno, cmd->server, - "%s: getrlimit failed", cmd->cmd->name); - return; - } - - if ((str = ap_getword_conf(cmd->pool, &arg))) { - if (!strcasecmp(str, "max")) { - cur = limit->rlim_max; - } - else { - cur = atol(str); - } - } - else { - ap_log_error(APLOG_MARK, APLOG_ERR, 0, cmd->server, - "Invalid parameters for %s", cmd->cmd->name); - return; - } - - if (arg2 && (str = ap_getword_conf(cmd->pool, &arg2))) { - max = atol(str); - } - - /* if we aren't running as root, cannot increase max */ - if (geteuid()) { - limit->rlim_cur = cur; - if (max) { - ap_log_error(APLOG_MARK, APLOG_ERR, 0, cmd->server, - "Must be uid 0 to raise maximum %s", cmd->cmd->name); - } - } - else { - if (cur) { - limit->rlim_cur = cur; - } - if (max) { - limit->rlim_max = max; - } - } -#else - - ap_log_error(APLOG_MARK, APLOG_ERR, 0, cmd->server, - "Platform does not support rlimit for %s", cmd->cmd->name); -#endif -} - -APR_HOOK_STRUCT( - APR_HOOK_LINK(get_suexec_identity) -) - -AP_IMPLEMENT_HOOK_RUN_FIRST(ap_unix_identity_t *, get_suexec_identity, - (const request_rec *r), (r), NULL) - -static apr_status_t ap_unix_create_privileged_process( - apr_proc_t *newproc, const char *progname, - const char * const *args, - const char * const *env, - apr_procattr_t *attr, ap_unix_identity_t *ugid, - apr_pool_t *p) -{ - int i = 0; - const char **newargs; - char *newprogname; - char *execuser, *execgroup; - const char *argv0; - - if (!unixd_config.suexec_enabled) { - return apr_proc_create(newproc, progname, args, env, attr, p); - } - - argv0 = ap_strrchr_c(progname, '/'); - /* Allow suexec's "/" check to succeed */ - if (argv0 != NULL) { - argv0++; - } - else { - argv0 = progname; - } - - - if (ugid->userdir) { - execuser = apr_psprintf(p, "~%ld", (long) ugid->uid); - } - else { - execuser = apr_psprintf(p, "%ld", (long) ugid->uid); - } - execgroup = apr_psprintf(p, "%ld", (long) ugid->gid); - - if (!execuser || !execgroup) { - return APR_ENOMEM; - } - - i = 0; - if (args) { - while (args[i]) { - i++; - } - } - /* allocate space for 4 new args, the input args, and a null terminator */ - newargs = apr_palloc(p, sizeof(char *) * (i + 4)); - newprogname = SUEXEC_BIN; - newargs[0] = SUEXEC_BIN; - newargs[1] = execuser; - newargs[2] = execgroup; - newargs[3] = apr_pstrdup(p, argv0); - - /* - ** using a shell to execute suexec makes no sense thus - ** we force everything to be APR_PROGRAM, and never - ** APR_SHELLCMD - */ - if(apr_procattr_cmdtype_set(attr, APR_PROGRAM) != APR_SUCCESS) { - return APR_EGENERAL; - } - - i = 1; - do { - newargs[i + 3] = args[i]; - } while (args[i++]); - - return apr_proc_create(newproc, newprogname, newargs, env, attr, p); -} - -AP_DECLARE(apr_status_t) ap_os_create_privileged_process( - const request_rec *r, - apr_proc_t *newproc, const char *progname, - const char * const *args, - const char * const *env, - apr_procattr_t *attr, apr_pool_t *p) -{ - ap_unix_identity_t *ugid = ap_run_get_suexec_identity(r); - - if (ugid == NULL) { - return apr_proc_create(newproc, progname, args, env, attr, p); - } - - return ap_unix_create_privileged_process(newproc, progname, args, env, - attr, ugid, p); -} - -/* XXX move to APR and externalize (but implement differently :) ) */ -static apr_lockmech_e proc_mutex_mech(apr_proc_mutex_t *pmutex) -{ - const char *mechname = apr_proc_mutex_name(pmutex); - - if (!strcmp(mechname, "sysvsem")) { - return APR_LOCK_SYSVSEM; - } - else if (!strcmp(mechname, "flock")) { - return APR_LOCK_FLOCK; - } - return APR_LOCK_DEFAULT; -} - -AP_DECLARE(apr_status_t) unixd_set_proc_mutex_perms(apr_proc_mutex_t *pmutex) -{ - if (!geteuid()) { - apr_lockmech_e mech = proc_mutex_mech(pmutex); - - switch(mech) { -#if APR_HAS_SYSVSEM_SERIALIZE - case APR_LOCK_SYSVSEM: - { - apr_os_proc_mutex_t ospmutex; -#if !APR_HAVE_UNION_SEMUN - union semun { - long val; - struct semid_ds *buf; - unsigned short *array; - }; -#endif - union semun ick; - struct semid_ds buf; - - apr_os_proc_mutex_get(&ospmutex, pmutex); - buf.sem_perm.uid = unixd_config.user_id; - buf.sem_perm.gid = unixd_config.group_id; - buf.sem_perm.mode = 0600; - ick.buf = &buf; - if (semctl(ospmutex.crossproc, 0, IPC_SET, ick) < 0) { - return errno; - } - } - break; -#endif -#if APR_HAS_FLOCK_SERIALIZE - case APR_LOCK_FLOCK: - { - const char *lockfile = apr_proc_mutex_lockfile(pmutex); - - if (lockfile) { - if (chown(lockfile, unixd_config.user_id, - -1 /* no gid change */) < 0) { - return errno; - } - } - } - break; -#endif - default: - /* do nothing */ - break; - } - } - return APR_SUCCESS; -} - -AP_DECLARE(apr_status_t) unixd_set_global_mutex_perms(apr_global_mutex_t *gmutex) -{ -#if !APR_PROC_MUTEX_IS_GLOBAL - apr_os_global_mutex_t osgmutex; - apr_os_global_mutex_get(&osgmutex, gmutex); - return unixd_set_proc_mutex_perms(osgmutex.proc_mutex); -#else /* APR_PROC_MUTEX_IS_GLOBAL */ - /* In this case, apr_proc_mutex_t and apr_global_mutex_t are the same. */ - return unixd_set_proc_mutex_perms(gmutex); -#endif /* APR_PROC_MUTEX_IS_GLOBAL */ -} - -AP_DECLARE(apr_status_t) unixd_accept(void **accepted, ap_listen_rec *lr, - apr_pool_t *ptrans) -{ - apr_socket_t *csd; - apr_status_t status; - - *accepted = NULL; - status = apr_accept(&csd, lr->sd, ptrans); - if (status == APR_SUCCESS) { - *accepted = csd; - return APR_SUCCESS; - } - - if (APR_STATUS_IS_EINTR(status)) { - return status; - } - /* Our old behaviour here was to continue after accept() - * errors. But this leads us into lots of troubles - * because most of the errors are quite fatal. For - * example, EMFILE can be caused by slow descriptor - * leaks (say in a 3rd party module, or libc). It's - * foolish for us to continue after an EMFILE. We also - * seem to tickle kernel bugs on some platforms which - * lead to never-ending loops here. So it seems best - * to just exit in most cases. - */ - switch (status) { -#if defined(HPUX11) && defined(ENOBUFS) - /* On HPUX 11.x, the 'ENOBUFS, No buffer space available' - * error occurs because the accept() cannot complete. - * You will not see ENOBUFS with 10.20 because the kernel - * hides any occurrence from being returned to user space. - * ENOBUFS with 11.x's TCP/IP stack is possible, and could - * occur intermittently. As a work-around, we are going to - * ignore ENOBUFS. - */ - case ENOBUFS: -#endif - -#ifdef EPROTO - /* EPROTO on certain older kernels really means - * ECONNABORTED, so we need to ignore it for them. - * See discussion in new-httpd archives nh.9701 - * search for EPROTO. - * - * Also see nh.9603, search for EPROTO: - * There is potentially a bug in Solaris 2.x x<6, - * and other boxes that implement tcp sockets in - * userland (i.e. on top of STREAMS). On these - * systems, EPROTO can actually result in a fatal - * loop. See PR#981 for example. It's hard to - * handle both uses of EPROTO. - */ - case EPROTO: -#endif -#ifdef ECONNABORTED - case ECONNABORTED: -#endif - /* Linux generates the rest of these, other tcp - * stacks (i.e. bsd) tend to hide them behind - * getsockopt() interfaces. They occur when - * the net goes sour or the client disconnects - * after the three-way handshake has been done - * in the kernel but before userland has picked - * up the socket. - */ -#ifdef ECONNRESET - case ECONNRESET: -#endif -#ifdef ETIMEDOUT - case ETIMEDOUT: -#endif -#ifdef EHOSTUNREACH - case EHOSTUNREACH: -#endif -#ifdef ENETUNREACH - case ENETUNREACH: -#endif - /* EAGAIN/EWOULDBLOCK can be returned on BSD-derived - * TCP stacks when the connection is aborted before - * we call connect, but only because our listener - * sockets are non-blocking (AP_NONBLOCK_WHEN_MULTI_LISTEN) - */ -#ifdef EAGAIN - case EAGAIN: -#endif -#ifdef EWOULDBLOCK -#if !defined(EAGAIN) || EAGAIN != EWOULDBLOCK - case EWOULDBLOCK: -#endif -#endif - break; -#ifdef ENETDOWN - case ENETDOWN: - /* - * When the network layer has been shut down, there - * is not much use in simply exiting: the parent - * would simply re-create us (and we'd fail again). - * Use the CHILDFATAL code to tear the server down. - * @@@ Martin's idea for possible improvement: - * A different approach would be to define - * a new APEXIT_NETDOWN exit code, the reception - * of which would make the parent shutdown all - * children, then idle-loop until it detected that - * the network is up again, and restart the children. - * Ben Hyde noted that temporary ENETDOWN situations - * occur in mobile IP. - */ - ap_log_error(APLOG_MARK, APLOG_EMERG, status, ap_server_conf, - "apr_accept: giving up."); - return APR_EGENERAL; -#endif /*ENETDOWN*/ - -#ifdef TPF - case EINACT: - ap_log_error(APLOG_MARK, APLOG_EMERG, status, ap_server_conf, - "offload device inactive"); - return APR_EGENERAL; - break; - default: - ap_log_error(APLOG_MARK, APLOG_ERR, 0, ap_server_conf, - "select/accept error (%d)", status); - return APR_EGENERAL; -#else - default: - ap_log_error(APLOG_MARK, APLOG_ERR, status, ap_server_conf, - "apr_accept: (client socket)"); - return APR_EGENERAL; -#endif - } - return status; -} - |