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Man Pages
explain_usleep_or_die(3) FreeBSD Library Functions Manual explain_usleep_or_die(3)

explain_usleep_or_die - suspend execution for ms intervals and report errors

#include <libexplain/usleep.h>

void explain_usleep_or_die(long long usec);
int explain_usleep_on_error(long long usec);

The explain_usleep_or_die function is used to call the usleep(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_usleep(3) function, and then the process terminates by calling exit(EXIT_FAILURE).

The explain_usleep_on_error function is used to call the usleep(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_usleep(3) function, but still returns to the caller.

usec
The usec, exactly as to be passed to the usleep(3) system call.

The explain_usleep_or_die function only returns on success, see usleep(3) for more information. On failure, prints an explanation and exits, it does not return.

The explain_usleep_on_error function always returns the value return by the wrapped usleep(3) system call.

The explain_usleep_or_die function is intended to be used in a fashion similar to the following example:
explain_usleep_or_die(usec);

usleep(3)
suspend execution for microsecond intervals
explain_usleep(3)
explain usleep(3) errors
exit(2)
terminate the calling process

libexplain version 1.3
Copyright (C) 2013 Peter Miller

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