initgroups

Sommaire

NAME

initgroups - initialize the supplementary group access list

SYNOPSIS


#include <sys/types.h>

#include <grp.h>



int initgroups(const char *user, gid_t group);

Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

initgroups(): _BSD_SOURCE

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 underlying system call setgroups(2).

FILES


/etc/group              group database file

CONFORMING TO

SVr4, 4.3BSD

SEE ALSO

getgroups(2), setgroups(2), credentials(7)