DragonFly On-Line Manual Pages


GETGROUPS(2)		 DragonFly System Calls Manual		  GETGROUPS(2)

NAME

getgroups -- get group access list

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include <sys/types.h> #include <unistd.h> int getgroups(int gidsetlen, gid_t *gidset);

DESCRIPTION

Getgroups() gets the current group access list of the user process and stores it in the array gidset. The parameter gidsetlen indicates the number of entries that may be placed in gidset. Getgroups() 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

The getgroups() function call appeared in 4.2BSD. DragonFly 3.7 March 5, 1999 DragonFly 3.7