waitfor

Wait until a stat() on the specified path succeeds

Syntax:

waitfor pathname [wait_time [poll_ms]]

Runs on:

QNX Neutrino

Options:

pathname: The path to test.
wait_time: The maximum number of seconds to wait for the file to appear. It can include one decimal digit to specify tenths of a second. The default is 5.0 seconds.
poll_ms: (QNX Neutrino 6.6 or later) The number of milliseconds to wait between checks for the path. The default is 100 milliseconds.

Description:

The waitfor utility pauses temporarily until a stat() on the specified pathname succeeds. It's often used for synchronization, to allow a resource manager to perform its startup functionality, and then for the process manager to proceed with the further interpretation of the script file.

Note:

The network drivers don't put entries into the /dev/ namespace, so a waitfor command for such an entry won't work properly in buildfiles or scripts. Use if_up -p instead; for example, if_up -p en0.

The stat() operation is relatively expensive on QNX Neutrino, so you should avoid having several processes concurrently use waitfor with small polling periods because this can create a lot of resource contention on your system.

Exit status:

Zero on success, or a nonzero value if a timeout occurred.