explain_setpriority_or_die - set program scheduling priority and report errors
#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);
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.
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.
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);
- setpriority(2)
- set program scheduling priority
- explain_setpriority(3)
- explain setpriority(2) errors
- exit(2)
- terminate the calling process
libexplain version 1.3
Copyright (C) 2013 Peter Miller