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explain_getgroups_or_die

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 0.19
Copyright (C) 2009 Peter Miller