NAME¶

group_member - test whether a process is in a group

LIBRARY¶

Standard C library (libc, -lc)

SYNOPSIS¶

#include <unistd.h>

int group_member(gid_t gid);

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.

STANDARDS¶

GNU.

SEE ALSO¶

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