explain_setpgid_or_die

NAME

explain_setpgid_or_die − set process group and report errors

SYNOPSIS

#include <libexplain/setpgid.h>
void explain_setpgid_or_die(pid_t pid, pid_t pgid);
int explain_setpgid_on_error(pid_t pid, pid_t pgid);

DESCRIPTION

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

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

RETURN VALUE

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

The explain_setpgid_on_error function always returns the value return by the wrapped setpgid(2) system call.

EXAMPLE

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

explain_setpgid_or_die(pid, pgid);

SEE ALSO

setpgid(2)

set process group

explain_setpgid(3)

explain setpgid(2) errors

COPYRIGHT

libexplain version 1.4
Copyright (C) 2011 Peter Miller