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INITGROUPS(3) - Linux manual page online | Library functions

Initialize the supplementary group access list.

Chapter
2017-09-15
INITGROUPS(3) Linux Programmer's Manual INITGROUPS(3)

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/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

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7). ┌─────────────┬───────────────┬────────────────┐ │Interface │ Attribute │ Value │ ├─────────────┼───────────────┼────────────────┤ │initgroups() │ Thread safety │ MT-Safe locale │ └─────────────┴───────────────┴────────────────┘

CONFORMING TO

SVr4, 4.3BSD.

SEE ALSO

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

COLOPHON

This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.
GNU 2017-09-15 INITGROUPS(3)
This manual Reference Other manuals
initgroups(3) referred by credentials(7) | daemon(1) | getgroups(2) | getgroups(2freebsd) | group(5) | nss(5) | nss_ldap(5) | prayer.cf(5) | rlinetd.conf(5) | setgroups(2freebsd) | setpriv(1) | slapd(8)
refer to attributes(7) | credentials(7) | feature_test_macros(7) | getgroups(2)
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