group_member(3) [sunos man page]

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 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                                                                 2014-03-30                                                     GROUP_MEMBER(3)