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explain_getgroups_or_die

explain_getgroups_or_die

Section: C Library Functions (3)
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NAME

explain_getgroups_or_die - get supplementary group IDs and report errors  

SYNOPSIS

#include <libexplain/getgroups.h>

void explain_getgroups_or_die(int data_size, gid_t *data);
int explain_getgroups_on_error(int data_size, gid_t *data);  

DESCRIPTION

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

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

data_size
The data_size, exactly as to be passed to the getgroups(2) system call.
data
The data, exactly as to be passed to the getgroups(2) system call.
 

RETURN VALUE

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

The explain_getgroups_on_error function always returns the value return by the wrapped getgroups(2) system call.  

EXAMPLE

The explain_getgroups_or_die function is intended to be used in a fashion similar to the following example:
explain_getgroups_or_die(data_size, data);
 

SEE ALSO

getgroups(2)
get/set list of supplementary group IDs
explain_getgroups(3)
explain getgroups(2) errors
exit(2)
terminate the calling process
 

COPYRIGHT

libexplain version 0.37
Copyright (C) 2009 Peter Miller


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
EXAMPLE
SEE ALSO
COPYRIGHT

This document was created by man2html, using the manual pages.
Time: 21:45:49 GMT, April 16, 2011