os/beos/beosd.c

   1 /* Licensed to the Apache Software Foundation (ASF) under one or more
   2  * contributor license agreements.  See the NOTICE file distributed with
   3  * this work for additional information regarding copyright ownership.
   4  * The ASF licenses this file to You under the Apache License, Version 2.0
   5  * (the "License"); you may not use this file except in compliance with
   6  * the License.  You may obtain a copy of the License at
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include <unistd.h>
  18 #include "httpd.h"
  19 #include "http_config.h"
  20 #include "http_main.h"
  21 #include "http_log.h"
  22 #include "beosd.h"
  23 #include "mpm_common.h"
  24
  25 beosd_config_rec beosd_config;
  26
  27 /* Set group privileges.
  28  *
  29  * Note that until we get the multi-user situation sorted on beos,
  30  * this is just a no-op to allow common configuration files!
  31  */
  32
  33 #if B_BEOS_VERSION < 0x0460
  34 static int set_group_privs(void)
  35 {
  36     /* no-op */
  37     return 0;
  38 }
  39 #endif
  40
  41
  42 int beosd_setup_child(void)
  43 {
  44     /* TODO: revisit the whole issue of users/groups for BeOS as
  45      * R5 and below doesn't really have much concept of them.
  46      */
  47
  48     return 0;
  49 }
  50
  51
  52 AP_DECLARE(const char *) beosd_set_user(cmd_parms *cmd,
  53                                         void *dummy, const char *arg)
  54 {
  55     /* no-op */
  56     return NULL;
  57 }
  58
  59 AP_DECLARE(const char *) beosd_set_group(cmd_parms *cmd,
  60                                          void *dummy, const char *arg)
  61 {
  62     /* no-op */
  63     return NULL;
  64 }
  65
  66 void beosd_pre_config(void)
  67 {
  68     /* Until the multi-user situation on BeOS is fixed,
  69        simply have a no-op here to allow for common conf files
  70      */
  71 }
  72
  73 AP_DECLARE(apr_status_t) beosd_accept(void **accepted, ap_listen_rec *lr,
  74                                       apr_pool_t *ptrans)
  75 {
  76     apr_socket_t *csd;
  77     apr_status_t status;
  78     int sockdes;
  79
  80     status = apr_socket_accept(&csd, lr->sd, ptrans);
  81     if (status == APR_SUCCESS) {
  82         *accepted = csd;
  83         apr_os_sock_get(&sockdes, csd);
  84         if (sockdes >= FD_SETSIZE) {
  85             ap_log_error(APLOG_MARK, APLOG_WARNING, 0, NULL,
  86                          "new file descriptor %d is too large; you probably need "
  87                          "to rebuild Apache with a larger FD_SETSIZE "
  88                          "(currently %d)",
  89                          sockdes, FD_SETSIZE);
  90             apr_socket_close(csd);
  91             return APR_EINTR;
  92         }
  93         return status;
  94     }
  95
  96     if (APR_STATUS_IS_EINTR(status)) {
  97         return status;
  98     }
  99     /* Our old behaviour here was to continue after accept()
 100      * errors.  But this leads us into lots of troubles
 101      * because most of the errors are quite fatal.  For
 102      * example, EMFILE can be caused by slow descriptor
 103      * leaks (say in a 3rd party module, or libc).  It's
 104      * foolish for us to continue after an EMFILE.  We also
 105      * seem to tickle kernel bugs on some platforms which
 106      * lead to never-ending loops here.  So it seems best
 107      * to just exit in most cases.
 108      */
 109     switch (status) {
 110 #ifdef EPROTO
 111         /* EPROTO on certain older kernels really means
 112          * ECONNABORTED, so we need to ignore it for them.
 113          * See discussion in new-httpd archives nh.9701
 114          * search for EPROTO.
 115          *
 116          * Also see nh.9603, search for EPROTO:
 117          * There is potentially a bug in Solaris 2.x x<6,
 118          * and other boxes that implement tcp sockets in
 119          * userland (i.e. on top of STREAMS).  On these
 120          * systems, EPROTO can actually result in a fatal
 121          * loop.  See PR#981 for example.  It's hard to
 122          * handle both uses of EPROTO.
 123          */
 124         case EPROTO:
 125 #endif
 126 #ifdef ECONNABORTED
 127         case ECONNABORTED:
 128 #endif
 129 #ifdef ETIMEDOUT
 130         case ETIMEDOUT:
 131 #endif
 132 #ifdef EHOSTUNREACH
 133         case EHOSTUNREACH:
 134 #endif
 135 #ifdef ENETUNREACH
 136         case ENETUNREACH:
 137 #endif
 138             break;
 139 #ifdef ENETDOWN
 140         case ENETDOWN:
 141             /*
 142              * When the network layer has been shut down, there
 143              * is not much use in simply exiting: the parent
 144              * would simply re-create us (and we'd fail again).
 145              * Use the CHILDFATAL code to tear the server down.
 146              * @@@ Martin's idea for possible improvement:
 147              * A different approach would be to define
 148              * a new APEXIT_NETDOWN exit code, the reception
 149              * of which would make the parent shutdown all
 150              * children, then idle-loop until it detected that
 151              * the network is up again, and restart the children.
 152              * Ben Hyde noted that temporary ENETDOWN situations
 153              * occur in mobile IP.
 154              */
 155             ap_log_error(APLOG_MARK, APLOG_EMERG, status, ap_server_conf,
 156                          "apr_socket_accept: giving up.");
 157             return APR_EGENERAL;
 158 #endif /*ENETDOWN*/
 159
 160         default:
 161             ap_log_error(APLOG_MARK, APLOG_ERR, status, ap_server_conf,
 162                          "apr_socket_accept: (client socket)");
 163             return APR_EGENERAL;
 164     }
 165     return status;
 166 }