SETGROUPS(2) BSD System Calls Manual SETGROUPS(2)NAMEsetgroups — set group access list
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <sys/param.h>
#include <unistd.h>
int
setgroups(int ngroups, const gid_t *gidset);
DESCRIPTION
The setgroups() system call sets the group access list of the current
user process according to the array gidset. The ngroups argument indi‐
cates the number of entries in the array and must be no more than
{NGROUPS_MAX}+1.
Only the super-user may set a new group list.
RETURN VALUES
The setgroups() function returns the value 0 if successful; otherwise the
value -1 is returned and the global variable errno is set to indicate the
error.
ERRORS
The setgroups() system call will fail if:
[EPERM] The caller is not the super-user.
[EINVAL] The number specified in the ngroups argument is larger
than the {NGROUPS_MAX}+1 limit.
[EFAULT] The address specified for gidset is outside the
process address space.
SEE ALSOgetgroups(2), initgroups(3)HISTORY
The setgroups() system call appeared in 4.2BSD.
BSD April 16, 1994 BSD