---

---

---

INITGROUPS

Section: Linux Programmer's Manual (3)
Updated: 2007-07-26
Index Return to Main Contents

---

 

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)  

COLOPHON

This page is part of release 3.35 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://man7.org/linux/man-pages/.

---

 

Index

NAME

SYNOPSIS

DESCRIPTION

RETURN VALUE

ERRORS

FILES

CONFORMING TO

SEE ALSO

COLOPHON

---

---

---