HP-UX Reference (11i v2 04/09) - 2 System Calls (vol 5)

setgroups(2) setgroups(2)

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 indi-

cate 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.