125 lines
2.9 KiB
C
125 lines
2.9 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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/* headers are clean */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <string.h>
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#include <limits.h>
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#include <stdio.h>
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#include <time.h>
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#include "cinit.h"
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/***********************************************************************
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* run_svc: run a service and beforeo all dependencies
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*/
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int run_svc(char *rpath)
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{
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int tmp;
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pid_t pid;
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char abspath[PATH_MAX], pathtmp[PATH_MAX]; /* pathtmp = use-it-for-all bitch*/
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struct stat buf;
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struct timespec ts;
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/******************* absolute PATH ***************/
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/* get current working dir */
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if(! (int) getcwd(pathtmp,PATH_MAX)) {
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perror(pathtmp);
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return 0;
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}
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/* change to rpath */
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if(chdir(rpath) == -1) {
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perror(rpath);
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return 0;
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}
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/* get absolute name of rpath */
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if(! (int) getcwd(abspath,PATH_MAX)) {
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perror(abspath);
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return 0;
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}
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/* change back */
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if(chdir(pathtmp) == -1) {
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perror(pathtmp);
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return 0;
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}
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/******************* REGISTER SERVICE ***************/
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do {
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tmp = msg_svc_on_off(abspath,1); /* check status */
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switch(tmp) {
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case 0: /* failed to communicate */
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case ST_FAIL: /* somebody failed, we won't retry */
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return 0;
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break;
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case ST_TMP: /* someone is working on it */
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ts.tv_sec = SLEEP_RERUN;
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nanosleep(&ts,NULL);
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break;
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case ST_ONCE: /* somebody did our work */
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case ST_RESPAWN: /* somebody does our work */
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return 1;
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break;
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case ST_TMPNOW: /* we are on it! */
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break;
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}
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} while(tmp != ST_TMPNOW);
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/******************* BEGIN DEPENDENCIES ***************/
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strcpy(pathtmp,abspath);
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strcat(pathtmp,SLASH);
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strcat(pathtmp,C_NEEDS);
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if( stat(pathtmp,&buf) == 0 ) {
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if( ! run_run_svcs(pathtmp) ) {
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msg_change_status(abspath, ST_FAIL, 0);
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return 0;
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}
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}
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/********** WANTS ************/
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strcpy(pathtmp,abspath);
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strcat(pathtmp,SLASH);
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strcat(pathtmp,C_WANTS);
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if( stat(pathtmp,&buf) == 0 ) {
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run_run_svcs(pathtmp); /* don't care about what happens with the want svc */
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}
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/******************* execute services ***************/
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strcpy(pathtmp,abspath);
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strcat(pathtmp,SLASH);
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strcat(pathtmp,C_RESPAWN);
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if( stat(pathtmp,&buf) == 0) {
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pid = respawn_svc(abspath);
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tmp = ST_RESPAWN;
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} else {
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pid = exec_svc(abspath, 1);
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tmp = ST_ONCE;
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}
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if(!pid) {
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msg_change_status(abspath, ST_FAIL, pid);
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D_PRINTF(abspath);
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D_PRINTF("exec fehlgeschlagen");
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return 0;
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}
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if(!msg_change_status(abspath, tmp, pid) ) {
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D_PRINTF("msg change fehlgeschlagen");
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return 0;
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}
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return 1;
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}
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