NAME
setgroups — set group access list
SYNOPSIS
#include <unistd.h>
int setgroups(int ngroups, const gid_t *gidset);
DESCRIPTION
setgroups()
sets the group access list of the current user process
according to the array
gidset.
The parameter
ngroups
indicates the number of entries in the array and must be no
more than
NGROUPS_MAX,
as defined in
<limits.h>.
Only
super-user
can set new groups
by adding to the group access list of the current user process;
any user can delete groups from it.
RETURN VALUE
Upon successful completion,
setgroups()
returns 0; otherwise it returns -1 and sets
errno
to indicate the error.
ERRORS
setgroups()
fails if any of the following conditions are encountered:
- [EPERM]
The caller
is not super-user
and has attempted to set new groups.
- [EFAULT]
The address specified for
gidset
is outside the process address space.
The reliable detection of this error is implementation dependent.
- [EINVAL]
ngroups
is greater than
NGROUPS_MAX
or not positive.
- [EINVAL]
An entry in
gidset
is not a valid group
ID.
AUTHOR
setgroups()
was developed by the University of California,
Berkeley.
STANDARDS CONFORMANCE
setgroups(): AES, SVID3
