76 lines
1.6 KiB
C
76 lines
1.6 KiB
C
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/*
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* (c) 2005 Nico Schottelius (nico-linux at schottelius.org)
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* run_svc
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* part of cinit
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*/
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <stdio.h>
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//#include <signal.h>
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#include "cinit.h"
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/* run a service, gets (relative or absolute) path */
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pid_t respawn_svc(char *abspath)
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{
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pid_t pid;
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int status;
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int pipefd[2];
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// struct sigaction sa;
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if(pipe(pipefd) == -1) {
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perror(MSG_ERR_PIPE);
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return 0;
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}
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pid = fork();
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if(pid == -1) {
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perror(MSG_ERR_FORK);
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return 0;
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}
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/******************** PARENT ********************/
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if(pid > 0) {
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/* if we read anything, our child succeded */
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if( read(pipefd[0],&status,sizeof(status)) == -1) {
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perror(MSG_ERR_IO);
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return 0;
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}
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return pid; /* return watchers pid */
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}
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/******************** CHILD ********************/
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/* FIXME: add handling for SIGTERM! */
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// sa.sa_handler= ( (void*)(int) ) sig_terminate;
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// sigaction(SIGTERM,&sa,NULL); /* term = kill respawing process */
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status = 1;
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if( write(pipefd[1],&status,sizeof(status)) == -1) {
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perror(MSG_ERR_IO);
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_exit(1);
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}
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while( status ) {
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D_PRINTF(abspath);
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pid = exec_svc(abspath, status);
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waitpid(pid,&status,0);
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if( WIFEXITED(status) ) {
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if( WEXITSTATUS(status) ) { /* non-zero exit status */
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/* sleep conf/c_sleep seconds on error exit */
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sleep(SLEEP_SVC);
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D_PRINTF("schlecht gestorben");
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}
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} else {
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sleep(SLEEP_SVC);
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D_PRINTF("nicht normal gestorben");
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}
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}
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_exit(0);
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}
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