group_member - test whether a process is in a group

NAME  LIBRARY  SYNOPSIS  DESCRIPTION  RETURN VALUE  STANDARDS  SEE ALSO 

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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 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)

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