GROUP_MEMBER(3)                     Linux Programmer's Manual                     GROUP_MEMBER(3)



NAME
       group_member - test whether a process is in a group

SYNOPSIS
       #include <unistd.h>

       int group_member(gid_t gid);

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

       group_member(): _GNU_SOURCE

DESCRIPTION
       The  group_member() function tests whether any of the caller's supplementary group IDs (as
       returned by getgroups(2)) matches gid.

RETURN VALUE
       The group_member() function returns nonzero if any of the caller's supplementary group IDs
       matches gid, and zero otherwise.

CONFORMING TO
       This function is a nonstandard GNU extension.

SEE ALSO
       getgid(2), getgroups(2), getgrouplist(3), group(5)

COLOPHON
       This  page  is  part of release 3.74 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 http://www.kernel.org/doc/man-pages/.



GNU                                         2014-03-30                            GROUP_MEMBER(3)