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clouseau: Handle error cases when daemonizing. 

Finishing what Hermet started here. Checking the return values and return
if we meet an error case. And yes, I did that because the failure in buildbot
annoyed me but checking for this retrun values makes actually sense.

SVN revision: 78759
This commit is contained in:
Stefan Schmidt 2012-11-01 13:08:04 +00:00
parent 500c76369c
commit c02ca8ed83
1 changed files with 5 additions and 4 deletions
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9
src/bin/clouseaud.c
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@ -73,7 +73,7 @@ _daemon_cleanup(void)
void daemonize(void)
{
int i,lfp, ret;
int i,lfp;
char str[10];
time_t currentTime;
@ -88,15 +88,16 @@ void daemonize(void)
setsid(); /* obtain a new process group */
for (i=getdtablesize();i>=0;--i) close(i); /* close all descriptors */
i=open("/dev/null",O_RDWR);
ret = dup(i); ret = dup(i); /* handle standart I/O */
if (dup(i) == -1) return; /* handle standart I/O */
if (dup(i) == -1) return; /* handle standart I/O */
umask(027); /* set newly created file permissions */
ret = chdir(RUNNING_DIR); /* change running directory */
if (chdir(RUNNING_DIR) == -1) return; /* change running directory */
lfp=open(LOCK_FILE,O_RDWR|O_CREAT,0640);
if (lfp<0) exit(1); /* can not open */
if (lockf(lfp,F_TLOCK,0)<0) exit(0); /* can not lock */
/* first instance continues */
sprintf(str,"%d\n",getpid());
ret = write(lfp,str,strlen(str)); /* record pid to lockfile */
if (write(lfp,str,strlen(str)) == -1) return; /* record pid to lockfile */
signal(SIGCHLD,SIG_IGN); /* ignore child */
signal(SIGTSTP,SIG_IGN); /* ignore tty signals */
signal(SIGTTOU,SIG_IGN);