Manpage of INITGROUPS

INITGROUPS

Section: Linux Programmer's Manual (3)
Updated: 2016-03-15
Index
 

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():
    Since glibc 2.19:
        _DEFAULT_SOURCE
    Glibc 2.19 and earlier:
        _BSD_SOURCE  

DESCRIPTION

The initgroups() function initializes the group access list by reading the group database /etc/groupand using all groups of which useris a member. The additional group groupis also added to the list.

The userargument must be non-NULL.  

RETURN VALUE

The initgroups() function returns 0 on success. On error, -1 is returned, and errnois 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
 

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).
InterfaceAttributeValue
initgroups() Thread safetyMT-Safe locale

 

CONFORMING TO

SVr4, 4.3BSD.  

SEE ALSO

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


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
FILES
ATTRIBUTES
CONFORMING TO
SEE ALSO

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