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Changed lauch() code

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This commit is contained in:
Michiel Broek 2006-02-05 14:15:17 +00:00
parent 81266cc973
commit ba17b61b84
1 changed files with 48 additions and 12 deletions
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60
mbtask/mbtask.c
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@ -432,6 +432,43 @@ void load_taskcfg(void)
/*
* Milliseconds timer, returns 0 on success.
*/
int msleep(int msecs)
{
int rc;
struct timespec req, rem;
rem.tv_sec = 0;
rem.tv_nsec = 0;
req.tv_sec = msecs / 1000;
req.tv_nsec = (msecs % 1000) * 1000000;
while (TRUE) {
rc = nanosleep(&req, &rem);
if (rc == 0)
break;
if ((errno == EINVAL) || (errno == EFAULT)) {
WriteError("$msleep(%d)", msecs);
break;
}
/*
* Error was EINTR, run timer again to complete.
*/
req.tv_sec = rem.tv_sec;
req.tv_nsec = rem.tv_nsec;
rem.tv_sec = 0;
rem.tv_nsec = 0;
}
return rc;
}
/*
* Launch an external program in the background.
* On success add it to the tasklist and return
@ -449,40 +486,39 @@ pid_t launch(char *cmd, char *opts, char *name, int tasktype)
return 0;
}
memset(vector, 0, sizeof(vector));
Syslog('r', "launch() step 2");
if (opts == NULL)
snprintf(buf, PATH_MAX, "%s", cmd);
else
snprintf(buf, PATH_MAX, "%s %s", cmd, opts);
Syslog('r', "launch() step 3");
i = 0;
vector[i++] = strtok(buf," \t\n\0");
while ((vector[i++] = strtok(NULL," \t\n")) && (i<16));
vector[15] = NULL;
Syslog('r', "launch() step 4");
if (file_exist(vector[0], X_OK)) {
Syslog('?', "Launch: can't execute %s, command not found", vector[0]);
return 0;
}
Syslog('r', "launch() step 5");
Syslog('r', "launch() step 2");
pid = fork();
Syslog('r', "launch() step 6");
switch (pid) {
switch (pid = fork()) {
case -1:
Syslog('?', "$Launch: error, can't fork grandchild");
return 0;
case 0:
Syslog('r', "launch() step 7");
/*
* A delay in the child process to prevent it returns
* before the main process sess it ever started.
*/
msleep(150);
Syslog('r', "launch() step 3");
/* From Paul Vixies cron: */
rc = setsid(); /* It doesn't seem to help */
if (rc == -1)
Syslog('?', "$Launch: setsid()");
Syslog('r', "launch() step 8");
close(0);
if (open("/dev/null", O_RDONLY) != 0) {
@ -500,7 +536,7 @@ pid_t launch(char *cmd, char *opts, char *name, int tasktype)
_exit(MBERR_EXEC_FAILED);
}
errno = 0;
Syslog('r', "launch() step 9");
Syslog('r', "launch() step 4");
rc = execv(vector[0],vector);
Syslog('?', "$Launch: execv \"%s\" failed, returned %d", cmd, rc);
_exit(MBERR_EXEC_FAILED);
@ -509,7 +545,7 @@ pid_t launch(char *cmd, char *opts, char *name, int tasktype)
break;
}
Syslog('r', "launch() step 10");
Syslog('r', "launch() step 5");
/*
* Add it to the tasklist.
*/