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explain_getpgid_or_die - get process group and report errors

explain_getpgid_or_die(3) Library Functions Manual explain_getpgid_or_die(3)

NAME

explain_getpgid_or_die - get process group and report errors

SYNOPSIS

#include <libexplain/getpgid.h>
 
pid_t explain_getpgid_or_die(pid_t pid);
 
pid_t explain_getpgid_on_error(pid_t pid);

DESCRIPTION

The explain_getpgid_or_die function is used to call the getpgid(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_getpgid(3) function, and then the process terminates by calling exit(EXIT_FAILURE).
The explain_getpgid_on_error function is used to call the getpgid(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_getpgid(3) function, but still returns to the caller.
pid
The pid, exactly as to be passed to the getpgid(2) system call.

RETURN VALUE

The explain_getpgid_or_die function only returns on success, see getpgid(2) for more information. On failure, prints an explanation and exits, it does not return.
The explain_getpgid_on_error function always returns the value return by the wrapped getpgid(2) system call.

EXAMPLE

The explain_getpgid_or_die function is intended to be used in a fashion similar to the following example:
pid_t result = explain_getpgid_or_die(pid);

SEE ALSO

getpgid(2)
get process group
explain_getpgid(3)
explain getpgid(2) errors
exit(2)
terminate the calling process
libexplain version 1.4
 
Copyright (C) 2011 Peter Miller
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