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@(#)setgroups.2 6.5 (Berkeley) 05/18/89

C 5 setgroups - set group access list

#include <sys/param.h>

setgroups(ngroups, gidset)
int ngroups, *gidset;

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, as defined in < sys/param.h >.

Only the super-user may set new groups.

A 0 value is returned on success, -1 on error, with a error code stored in errno. The setgroups call will fail if:

15 [EPERM] The caller is not the super-user.

15 [EFAULT] The address specified for gidset is outside the process address space.

getgroups(2), initgroups(3) The gidset array should be of type gid_t , but remains integer for compatibility with earlier systems.