INITGROUPS(3) Linux Programmer's Manual INITGROUPS(3)NAMEinitgroups - initialize the supplementary group access list
SYNOPSIS
#include <sys/types.h>
#include <grp.h>
int initgroups(const char *user, gid_t group);
DESCRIPTION
The initgroups() function initializes the group access list by reading
the group database /etc/group and using all groups of which user is a
member. The additional group group is also added to the list.
The user argument must be non-NULL.
RETURN VALUE
The initgroups() function returns 0 on success. On error, -1 is
returned, and errno is set appropriately.
ERRORS
ENOMEM Insufficient memory to allocate group information structure.
EPERM The calling process has insufficient privilege. See the underly‐
ing system call setgroups(2).
FILES
/etc/group group database file
CONFORMING TO
SVr4, 4.3BSD
NOTES
The prototype for initgroups() is only available if _BSD_SOURCE is
defined.
SEE ALSOgetgroups(2), setgroups(2)GNU 2004-10-10 INITGROUPS(3)