![Stefan Knoblich](/assets/img/avatar_default.png)
Fixes repeatedly printing the 'Starting forking listener' message, if stdout has been redirected into a logfile (for example). Signed-off-by: Stefan Knoblich <stkn@openisdn.net>
174 lines
4.7 KiB
C
174 lines
4.7 KiB
C
/*
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* Copyright (c) 2009-2012, Anthony Minessale II
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of the original author; nor the names of any contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <esl.h>
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#include <errno.h>
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#include <sys/wait.h>
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static void handle_SIGCHLD(int sig)
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{
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int status = 0;
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wait(&status);
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return;
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}
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static void my_forking_callback(esl_socket_t server_sock, esl_socket_t client_sock, struct sockaddr_in *addr)
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{
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esl_handle_t handle = {{0}};
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char path_buffer[1024] = { 0 };
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const char *path;
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char arg[64] = { 0 };
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signal(SIGCHLD, handle_SIGCHLD);
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if (fork()) {
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close(client_sock);
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return;
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}
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if (esl_attach_handle(&handle, client_sock, addr) != ESL_SUCCESS || !handle.info_event) {
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esl_log(ESL_LOG_ERROR, "Socket Error\n");
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exit(0);
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}
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if (!(path = esl_event_get_header(handle.info_event, "variable_ivr_path"))) {
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esl_disconnect(&handle);
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esl_log(ESL_LOG_ERROR, "Missing ivr_path param!\n");
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exit(0);
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}
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snprintf(arg, sizeof(arg), "%d", client_sock);
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strncpy(path_buffer, path, sizeof(path_buffer) - 1);
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/* hotwire the socket to STDIN/STDOUT */
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/* hotwire the socket to STDIN/STDOUT */
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if (!(dup2(client_sock, STDIN_FILENO)) && !(dup2(client_sock, STDOUT_FILENO))){
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esl_disconnect(&handle);
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esl_log(ESL_LOG_ERROR, "Socket Error hotwiring socket to STDIN/STDOUT!\n");
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return;
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}
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/* close the handle but leak the socket on purpose cos the child will need it open */
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handle.sock = -1;
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esl_disconnect(&handle);
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execl(path_buffer, path_buffer, arg, (char *)NULL);
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close(client_sock);
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exit(0);
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}
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static void mycallback(esl_socket_t server_sock, esl_socket_t client_sock, struct sockaddr_in *addr)
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{
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esl_handle_t handle = {{0}};
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const char *path;
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char path_buffer[1024] = { 0 };
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if (esl_attach_handle(&handle, client_sock, addr) != ESL_SUCCESS || !handle.info_event) {
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close(client_sock);
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esl_log(ESL_LOG_ERROR, "Socket Error\n");
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return;
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}
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if (!(path = esl_event_get_header(handle.info_event, "variable_ivr_path"))) {
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esl_disconnect(&handle);
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esl_log(ESL_LOG_ERROR, "Missing ivr_path param!\n");
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return;
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}
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snprintf(path_buffer, sizeof(path_buffer), "%s %d", path, client_sock);
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if (system(path_buffer)) {
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esl_log(ESL_LOG_ERROR, "System Call Failed! [%s]\n", strerror(errno));
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}
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esl_disconnect(&handle);
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}
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int main(int argc, char *argv[])
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{
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int i;
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char *ip = NULL;
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int port = 0, thread = 0;
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for (i = 1; i < argc; ) {
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int cont = 0;
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if (i + 1 < argc) {
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if (!strcasecmp(argv[i], "-h")) {
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ip = argv[++i]; cont++;
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} else if (!strcasecmp(argv[i], "-p")) {
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port = atoi(argv[++i]); cont++;
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}
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}
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if (cont) {
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i++;
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continue;
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}
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if (!strcasecmp(argv[i], "-t")) {
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thread++;
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}
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i++;
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}
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if (!(ip && port)) {
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fprintf(stderr, "Usage %s [-t] -h <host> -p <port>\n", argv[0]);
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return -1;
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}
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/*
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* NOTE: fflush() stdout before entering esl_listen().
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* Not doing so causes the fork()ed child to repeat the message for every incoming
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* connection, if stdout has been redirected (into a logfile, for example).
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*/
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if (thread) {
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printf("Starting threaded listener.\n");
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fflush(stdout);
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esl_listen_threaded(ip, port, mycallback, 100000);
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} else {
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printf("Starting forking listener.\n");
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fflush(stdout);
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esl_listen(ip, port, my_forking_callback);
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}
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return 0;
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}
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