explain_setpriority_or_die(3)

NAME

explain_setpriority_or_die - set program scheduling priority and report errors

SYNOPSIS

#include <libexplain/setpriority.h>

void explain_setpriority_or_die(int which, int who, int prio);
int explain_setpriority_on_error(int which, int who, int prio);

DESCRIPTION

The explain_setpriority_or_die function is used to call the setpriority(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_setpriority(3) function, and then the process terminates by calling exit(EXIT_FAILURE).

The explain_setpriority_on_error function is used to call the setpriority(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_setpriority(3) function, but still returns to the caller.

which: The which, exactly as to be passed to the setpriority(2) system call.

who: The who, exactly as to be passed to the setpriority(2) system call.

prio: The prio, exactly as to be passed to the setpriority(2) system call.

RETURN VALUE

The explain_setpriority_or_die function only returns on success, see setpriority(2) for more information. On failure, prints an explanation and exits, it does not return.

The explain_setpriority_on_error function always returns the value return by the wrapped setpriority(2) system call.

EXAMPLE

The explain_setpriority_or_die function is intended to be used in a fashion similar to the following example:

explain_setpriority_or_die(which, who, prio);