diff options
Diffstat (limited to 'APACHE_1_3_42/src/ap/ap_slack.c')
| -rw-r--r-- | APACHE_1_3_42/src/ap/ap_slack.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/APACHE_1_3_42/src/ap/ap_slack.c b/APACHE_1_3_42/src/ap/ap_slack.c new file mode 100644 index 0000000000..1de78ebe7d --- /dev/null +++ b/APACHE_1_3_42/src/ap/ap_slack.c @@ -0,0 +1,75 @@ +/* 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. + */ + +/* + * ap_slack.c: File descriptor preallocation + * + * 3/21/93 Rob McCool + * 1995-96 Many changes by the Apache Group + * + */ + +#include "httpd.h" +#include "http_log.h" + +#ifndef NO_SLACK +int ap_slack(int fd, int line) +{ +#if !defined(F_DUPFD) + return fd; +#else + static int low_warned; + int new_fd; + +#ifdef HIGH_SLACK_LINE + if (line == AP_SLACK_HIGH && fd < HIGH_SLACK_LINE) { + new_fd = fcntl(fd, F_DUPFD, HIGH_SLACK_LINE); + if (new_fd != -1) { + close(fd); + return new_fd; + } + } +#endif + /* otherwise just assume line == AP_SLACK_LOW */ + if (fd >= LOW_SLACK_LINE) { + return fd; + } + new_fd = fcntl(fd, F_DUPFD, LOW_SLACK_LINE); + if (new_fd == -1) { + if (!low_warned) { + /* Give them a warning here, because we really can't predict + * how libraries and such are going to fail. If we can't + * do this F_DUPFD there's a good chance that apache has too + * few descriptors available to it. Note we don't warn on + * the high line, because if it fails we'll eventually try + * the low line... + */ + ap_log_error(APLOG_MARK, APLOG_WARNING, NULL, + "unable to open a file descriptor above %u, " + "you may need to increase the number of descriptors", + LOW_SLACK_LINE); + low_warned = 1; + } + return fd; + } + close(fd); + return new_fd; +#endif +} +#else +/* need at least one function in the file for some linkers */ +void ap_slack_is_not_here(void) {} +#endif /* NO_SLACK */ |