:man| Alphabetical   Categories   About us 
 
GETGROUPS (2) | System calls | Unix Manual Pages | :man

NAME

getgroups - get group access list

CONTENTS

Library
Synopsis
Description
Return Values
Errors
See Also
History

LIBRARY


.Lb libc

SYNOPSIS


.In sys/types.h
.In unistd.h int getgroups "int gidsetlen" "gid_t *gidset"

DESCRIPTION

The getgroups system call gets the current group access list of the user process and stores it in the array gidset. The gidsetlen argument indicates the number of entries that may be placed in gidset. The getgroups system call returns the actual number of groups returned in gidset. No more than NGROUPS_MAX will ever be returned. If gidsetlen is zero, getgroups returns the number of supplementary group IDs associated with the calling process without modifying the array pointed to by gidset.

RETURN VALUES

A successful call returns the number of groups in the group set. A value of -1 indicates that an error occurred, and the error code is stored in the global variable errno.

ERRORS

The possible errors for getgroups are:
[EINVAL]
The argument gidsetlen is smaller than the number of groups in the group set.
[EFAULT]
The argument gidset specifies an invalid address.

SEE ALSO

setgroups(2), initgroups(3)

HISTORY


Share this page

     Follow us

Facebook Twitter Google+ LinkedIn


 
Created by Blin Media, 2008-2013