pid_t
WaitForValidPidFile(void)
{
CFAbsoluteTime patience = CFAbsoluteTimeGetCurrent() + kChildStartPidTimeout;
// Poll for a child process and pidfile to be generated, until we lose patience.
pid_t pid = -1;
while ((pid = CheckForValidPidFile()) == -1 && (patience - CFAbsoluteTimeGetCurrent() > 0))
sleep(1);
if (verbosity >= 3)
LogMessage("Discovered pid %d from pidfile %s\n", pid, pidFile);
return pid;
}
/* WaitForValidPidFile: Sometimes a valid pidfile will need to be generated first before anything can be done.
* Arguments: None.
* Return value: The valid pidfile that was found after waiting for it.
* Notes: Requires CoreFoundation (checked for by the MP_CHECK_FRAMEWORK_COREFOUNDATION autoconf macro in configure.ac, which comes from acinclude.m4)
*/
pid_t
WaitForValidPidFile(void)
{
CFAbsoluteTime patience = CFAbsoluteTimeGetCurrent() + kChildStartPidTimeout;
// Poll for a child process and pidfile to be generated, until we lose patience (literally: "patience" is a variable name).
// TODO: polling is generally considered bad; could there be a better way to do this?
pid_t pid = -1;
while ((pid = CheckForValidPidFile()) == -1 && (patience - CFAbsoluteTimeGetCurrent() > 0))
sleep(1);
if (verbosity >= 3)
LogMessage("Discovered pid %d from pidfile %s\n", pid, pidFile);
return pid;
}