os.c revision 059f354a6b7b116e4469ff7fe99c1142affa0ad6
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000 The Apache Software Foundation. All rights
* reserved.
*
* 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. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS 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, WHETHER 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* Portions of this software are based upon public domain software
* originally written at the National Center for Supercomputing Applications,
* University of Illinois, Urbana-Champaign.
*/
/*
* This file will include OS specific functions which are not inlineable.
* Any inlineable functions should be defined in os-inline.c instead.
*/
#include "httpd.h"
#include "http_core.h"
#include "os.h"
#include "scoreboard.h"
#include "http_log.h"
#include "http_conf_globals.h"
static FILE *sock_fp;
/* Check the Content-Type to decide if conversion is needed */
int ap_checkconv(struct request_rec *r)
{
int convert_to_ascii;
const char *type;
/* To make serving of "raw ASCII text" files easy (they serve faster
* since they don't have to be converted from EBCDIC), a new
* "magic" type prefix was invented: text/x-ascii-{plain,html,...}
* If we detect one of these content types here, we simply correct
* the type to the real text/{plain,html,...} type. Otherwise, we
* set a flag that translation is required later on.
*/
type = (r->content_type == NULL) ? ap_default_type(r) : r->content_type;
/* If no content type is set then treat it as (ebcdic) text/plain */
convert_to_ascii = (type == NULL);
/* Conversion is applied to text/ files only, if ever. */
if (type && (strncasecmp(type, "text/", 5) == 0 ||
strncasecmp(type, "message/", 8) == 0)) {
if (strncasecmp(type, ASCIITEXT_MAGIC_TYPE_PREFIX,
sizeof(ASCIITEXT_MAGIC_TYPE_PREFIX)-1) == 0){
r->content_type = ap_pstrcat(r->pool, "text/",
type+sizeof(ASCIITEXT_MAGIC_TYPE_PREFIX)-1, NULL);
if (r->method_number == M_PUT)
ap_bsetflag(r->connection->client, B_ASCII2EBCDIC, 0);
}
else
/* translate EBCDIC to ASCII */
convert_to_ascii = 1;
}
else{
if (r->method_number == M_PUT)
ap_bsetflag(r->connection->client, B_ASCII2EBCDIC, 0);
/* don't translate non-text files to EBCDIC */
}
/* Enable conversion if it's a text document */
ap_bsetflag(r->connection->client, B_EBCDIC2ASCII, convert_to_ascii);
return convert_to_ascii;
}
int tpf_select(int maxfds, fd_set *reads, fd_set *writes, fd_set *excepts, struct timeval *tv)
{
/* We're going to force our way through select. We're only interested reads and TPF allows
2billion+ socket descriptors for we don't want an fd_set that big. Just assume that maxfds-1
contains the socket descriptor we're interested in. If it's 0, leave it alone. */
int sockets[1];
int no_reads = 0;
int no_writes = 0;
int no_excepts = 0;
int timeout = 0;
int rv;
if(maxfds) {
if(tv)
timeout = tv->tv_sec * 1000 + tv->tv_usec;
sockets[0] = maxfds-1;
no_reads++;
}
else
sockets[0] = 0;
ap_check_signals();
rv = select(sockets, no_reads, no_writes, no_excepts, timeout);
ap_check_signals();
return rv;
}
int tpf_accept(int sockfd, struct sockaddr *peer, int *paddrlen)
{
int socks[1];
int rv;
ap_check_signals();
socks[0] = sockfd;
rv = select(socks, 1, 0, 0, 1000);
errno = sock_errno();
if(rv>0) {
ap_check_signals();
rv = accept(sockfd, peer, paddrlen);
errno = sock_errno();
}
return rv;
}
/* the getpass function is not usable on TPF */
char *getpass(const char* prompt)
{
errno = EIO;
return((char *)NULL);
}
#ifndef __PIPE_
int pipe(int fildes[2])
{
errno = ENOSYS;
return(-1);
}
#endif
/* fork and exec functions are not defined on
TPF due to the implementation of tpf_fork() */
pid_t fork(void)
{
errno = ENOSYS;
return(-1);
}
int execl(const char *path, const char *arg0, ...)
{
errno = ENOSYS;
return(-1);
}
int execle(const char *path, const char *arg0, ...)
{
errno = ENOSYS;
return(-1);
}
int execve(const char *path, char *const argv[], char *const envp[])
{
errno = ENOSYS;
return(-1);
}
int execvp(const char *file, char *const argv[])
{
errno = ENOSYS;
return(-1);
}
int ap_tpf_spawn_child(ap_context_t *p, int (*func) (void *, child_info *),
void *data, enum kill_conditions kill_how,
int *pipe_in, int *pipe_out, int *pipe_err,
int out_fds[], int in_fds[], int err_fds[])
{
int i, temp_out, temp_in, temp_err, save_errno, pid, result=0;
int fd_flags_out, fd_flags_in, fd_flags_err;
struct tpf_fork_input fork_input;
TPF_FORK_CHILD *cld = (TPF_FORK_CHILD *) data;
ap_array_header_t *env_arr = ap_table_elts ((array_header *) cld->subprocess_env);
table_entry *elts = (table_entry *) env_arr->elts;
if (func) {
if (result=func(data, NULL)) {
return 0; /* error from child function */
}
}
if (pipe_out) {
fd_flags_out = fcntl(out_fds[0], F_GETFD);
fcntl(out_fds[0], F_SETFD, FD_CLOEXEC);
temp_out = dup(STDOUT_FILENO);
fcntl(temp_out, F_SETFD, FD_CLOEXEC);
dup2(out_fds[1], STDOUT_FILENO);
}
if (pipe_in) {
fd_flags_in = fcntl(in_fds[1], F_GETFD);
fcntl(in_fds[1], F_SETFD, FD_CLOEXEC);
temp_in = dup(STDIN_FILENO);
fcntl(temp_in, F_SETFD, FD_CLOEXEC);
dup2(in_fds[0], STDIN_FILENO);
}
if (pipe_err) {
fd_flags_err = fcntl(err_fds[0], F_GETFD);
fcntl(err_fds[0], F_SETFD, FD_CLOEXEC);
temp_err = dup(STDERR_FILENO);
fcntl(temp_err, F_SETFD, FD_CLOEXEC);
dup2(err_fds[1], STDERR_FILENO);
}
if (cld->subprocess_env) {
for (i = 0; i < env_arr->nelts; ++i) {
if (!elts[i].key)
continue;
setenv (elts[i].key, elts[i].val, 1);
}
}
fork_input.program = (const char*) cld->filename;
fork_input.prog_type = cld->prog_type;
fork_input.istream = TPF_FORK_IS_BALANCE;
fork_input.ebw_data_length = 0;
fork_input.ebw_data = NULL;
fork_input.parm_data = NULL;
if ((pid = tpf_fork(&fork_input)) < 0) {
save_errno = errno;
if (pipe_out) {
close(out_fds[0]);
}
if (pipe_in) {
close(in_fds[1]);
}
if (pipe_err) {
close(err_fds[0]);
}
errno = save_errno;
pid = 0;
}
if (cld->subprocess_env) {
for (i = 0; i < env_arr->nelts; ++i) {
if (!elts[i].key)
continue;
unsetenv (elts[i].key);
}
}
if (pipe_out) {
close(out_fds[1]);
dup2(temp_out, STDOUT_FILENO);
close(temp_out);
fcntl(out_fds[0], F_SETFD, fd_flags_out);
}
if (pipe_in) {
close(in_fds[0]);
dup2(temp_in, STDIN_FILENO);
close(temp_in);
fcntl(in_fds[1], F_SETFD, fd_flags_in);
}
if (pipe_err) {
close(err_fds[1]);
dup2(temp_err, STDERR_FILENO);
close(temp_err);
fcntl(err_fds[0], F_SETFD, fd_flags_err);
}
if (pid) {
ap_note_subprocess(p, pid, kill_how);
if (pipe_out) {
*pipe_out = out_fds[0];
}
if (pipe_in) {
*pipe_in = in_fds[1];
}
if (pipe_err) {
*pipe_err = err_fds[0];
}
}
return pid;
}
pid_t os_fork(server_rec *s, int slot)
{
struct tpf_fork_input fork_input;
APACHE_TPF_INPUT input_parms;
int count;
listen_rec *lr;
fflush(stdin);
if (dup2(fileno(sock_fp), STDIN_FILENO) == -1)
ap_log_error(APLOG_MARK, APLOG_CRIT, s,
"unable to replace stdin with sock device driver");
fflush(stdout);
if (dup2(fileno(sock_fp), STDOUT_FILENO) == -1)
ap_log_error(APLOG_MARK, APLOG_CRIT, s,
"unable to replace stdout with sock device driver");
input_parms.generation = ap_my_generation;
#ifdef SCOREBOARD_FILE
input_parms.scoreboard_fd = scoreboard_fd;
#else /* must be USE_TPF_SCOREBOARD or USE_SHMGET_SCOREBOARD */
input_parms.scoreboard_heap = ap_scoreboard_image;
#endif
lr = ap_listeners;
count = 0;
do {
input_parms.listeners[count] = lr->fd;
lr = lr->next;
count++;
} while(lr != ap_listeners);
input_parms.slot = slot;
input_parms.restart_time = ap_restart_time;
fork_input.ebw_data = &input_parms;
fork_input.program = ap_server_argv0;
fork_input.prog_type = TPF_FORK_NAME;
fork_input.istream = TPF_FORK_IS_BALANCE;
fork_input.ebw_data_length = sizeof(input_parms);
fork_input.parm_data = "-x";
return tpf_fork(&fork_input);
}
int os_check_server(char *server) {
#ifndef USE_TPF_DAEMON
int rv;
int *current_acn;
if((rv = inetd_getServerStatus(server)) == INETD_SERVER_STATUS_INACTIVE)
return 1;
else {
current_acn = (int *)cinfc_fast(CINFC_CMMACNUM);
if(ecbp2()->ce2acn != *current_acn)
return 1;
}
#endif
return 0;
}
void os_note_additional_cleanups(ap_context_t *p, int sd) {
char sockfilename[50];
/* write the socket to file so that TPF socket device driver will close socket in case
we happen to abend. */
sprintf(sockfilename, "/dev/tpf.socket.file/%.8X", sd);
sock_fp = fopen(sockfilename, "r+");
ap_note_cleanups_for_file(p, sock_fp); /* arrange to close on exec or restart */
fcntl(sd,F_SETFD,FD_CLOEXEC);
}
void os_tpf_child(APACHE_TPF_INPUT *input_parms) {
tpf_child = 1;
ap_my_generation = input_parms->generation;
ap_restart_time = input_parms->restart_time;
}