71 lines
1.5 KiB
C
71 lines
1.5 KiB
C
#include <sys/wait.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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static void _entrance_wait_action(int sig, siginfo_t *si, void *data);
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static void kill_wait();
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static pid_t _x_pid = 0;
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static void
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_entrance_wait_action(int sig, siginfo_t * si __UNUSED__, void *data __UNUSED__)
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{
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kill_wait();
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if (sig != SIGCHLD)
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setenv("ENTRANCE_QUIT", "1", 1);
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}
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static void
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kill_wait()
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{
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kill(_x_pid, SIGTERM);
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}
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int
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main (int argc __UNUSED__, char **argv __UNUSED__)
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{
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int status = 0;
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char *pid;
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struct sigaction action;
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pid_t rpid;
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pid = getenv("ENTRANCE_XPID");
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if (!pid) return -1;
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_x_pid = atoi(pid);
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action.sa_sigaction = _entrance_wait_action;
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action.sa_flags = SA_RESTART | SA_SIGINFO;
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sigemptyset(&action.sa_mask);
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sigaction(SIGCHLD, &action, NULL);
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sigaction(SIGQUIT, &action, NULL);
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sigaction(SIGTERM, &action, NULL);
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sigaction(SIGKILL, &action, NULL);
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sigaction(SIGINT, &action, NULL);
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sigaction(SIGHUP, &action, NULL);
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sigaction(SIGPIPE, &action, NULL);
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sigaction(SIGALRM, &action, NULL);
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while ((rpid = wait(&status)) != _x_pid)
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{
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if (rpid == -1)
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{
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if ((errno == ECHILD) || (errno == EINVAL))
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break;
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}
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}
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if (_x_pid == rpid)
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{
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if (WIFEXITED(status) && WEXITSTATUS(status))
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setenv("ENTRANCE_QUIT", "1", 1);
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execlp("entrance", "entrance", "--nodaemon", NULL);
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}
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return -1;
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}
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