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 supple-
       mentary group IDs (as returned by getgroups(2)) matches gid.

RETURN VALUE
       The group_member() function returns nonzero if any of the caller's sup-
       plementary 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)

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