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waitfor()

Wait until a path exists

Synopsis:

#include <libgen.h>

int waitfor( const char *path,
             int delay_ms,
             int poll_ms );

Arguments:

path: The path you want to wait for.
delay_ms: The maximum time, in milliseconds, that you want to wait for.
poll_ms: The number of millseconds to delay between checks.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The waitfor() function waits for the given path to exist, up to a maximum time of delay_ms milliseconds, checking every poll_ms milliseconds. If you're waiting for a mountpoint, polling isn't necessary; you can specify 0 for poll_ms in this case.

Returns:

0: The path exists.
-1: An error occurred (errno is set).

Classification:

Safety:
Cancellation point	No
Interrupt handler	No
Signal handler	No
Thread	Yes

Related links

errno
Global error variable
stat(), stat64()
Get information about a file or directory, given a path
on (Utilities Reference)
waitfor (Utilities Reference)

W

Last modified: 2013-09-30

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