group_member(3) Library Functions Manual group_member(3)
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);
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.
STANDARDS
This function is a nonstandard GNU extension.
SEE ALSO
getgid(2), getgroups(2), getgrouplist(3), group(5)
Linux man-pages 6.03 2022-10-30 group_member(3)
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