group_member






group_member − test whether a process is in a group

#include<unistd.h>

     );int group_member(gid_t gid

Feature Test Macro Requirements for glibc (see

     _GNU_SOURCE

The function tests whether any of the caller’s supplementary
group IDs (as returned by matches

The function returns nonzero if any of the caller’s
supplementary group IDs matches and zero otherwise.

This function is a nonstandard GNU extension.



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