|explain_getpriority_or_die(3)||Library Functions Manual||explain_getpriority_or_die(3)|
explain_getpriority_or_die - get program scheduling priority and report errors
int explain_getpriority_or_die(int which, int who);
int explain_getpriority_on_error(int which, int who);
The explain_getpriority_or_die function is used to call the getpriority(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_getpriority(3) function, and then the process terminates by calling exit(EXIT_FAILURE).
The explain_getpriority_on_error function is used to call the getpriority(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_getpriority(3) function, but still returns to the caller.
The explain_getpriority_or_die function only returns on success, see getpriority(2) for more information. On failure, prints an explanation and exits, it does not return.
The explain_getpriority_on_error function always returns the value return by the wrapped getpriority(2) system call.
The explain_getpriority_or_die function is intended to be used in a fashion similar to the following example:
int result = explain_getpriority_or_die(which, who);
libexplain version 1.4
Copyright (C) 2013 Peter Miller