mirror of https://github.com/LeOS-GSI/LeOS-Genesis
141 lines
4.0 KiB
C
141 lines
4.0 KiB
C
/**
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* @file bprocess_example.c
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* @author Ambroz Bizjak <ambrop7@gmail.com>
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*
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* @section LICENSE
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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 are met:
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* 1. 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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* 2. 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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* 3. Neither the name of the author nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING 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 <stddef.h>
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#include <unistd.h>
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#include <misc/debug.h>
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#include <base/DebugObject.h>
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#include <base/BLog.h>
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#include <system/BReactor.h>
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#include <system/BUnixSignal.h>
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#include <system/BTime.h>
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#include <system/BProcess.h>
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BReactor reactor;
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BUnixSignal unixsignal;
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BProcessManager manager;
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BProcess process;
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static void unixsignal_handler (void *user, int signo);
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static void process_handler (void *user, int normally, uint8_t normally_exit_status);
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int main (int argc, char **argv)
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{
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if (argc <= 0) {
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return 1;
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}
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int ret = 1;
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if (argc < 2) {
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printf("Usage: %s <program> [argument ...]\n", argv[0]);
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goto fail0;
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}
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char *program = argv[1];
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// init time
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BTime_Init();
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// init logger
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BLog_InitStdout();
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// init reactor (event loop)
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if (!BReactor_Init(&reactor)) {
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DEBUG("BReactor_Init failed");
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goto fail1;
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}
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// choose signals to catch
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sigset_t set;
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sigemptyset(&set);
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sigaddset(&set, SIGINT);
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sigaddset(&set, SIGTERM);
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// init BUnixSignal for catching signals
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if (!BUnixSignal_Init(&unixsignal, &reactor, set, unixsignal_handler, NULL)) {
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DEBUG("BUnixSignal_Init failed");
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goto fail2;
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}
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// init process manager
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if (!BProcessManager_Init(&manager, &reactor)) {
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DEBUG("BProcessManager_Init failed");
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goto fail3;
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}
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char **p_argv = argv + 1;
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// map fds 0, 1, 2 in child to fds 0, 1, 2 in parent
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int fds[] = { 0, 1, 2, -1 };
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int fds_map[] = { 0, 1, 2 };
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// start child process
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if (!BProcess_InitWithFds(&process, &manager, process_handler, NULL, program, p_argv, NULL, fds, fds_map)) {
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DEBUG("BProcess_Init failed");
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goto fail4;
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}
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// enter event loop
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ret = BReactor_Exec(&reactor);
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BProcess_Free(&process);
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fail4:
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BProcessManager_Free(&manager);
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fail3:
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BUnixSignal_Free(&unixsignal, 0);
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fail2:
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BReactor_Free(&reactor);
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fail1:
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BLog_Free();
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fail0:
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DebugObjectGlobal_Finish();
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return ret;
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}
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void unixsignal_handler (void *user, int signo)
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{
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DEBUG("received %s, terminating child", (signo == SIGINT ? "SIGINT" : "SIGTERM"));
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// send SIGTERM to child
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BProcess_Terminate(&process);
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}
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void process_handler (void *user, int normally, uint8_t normally_exit_status)
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{
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DEBUG("process terminated");
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int ret = (normally ? normally_exit_status : 1);
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// return from event loop
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BReactor_Quit(&reactor, ret);
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}
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