1group_member(3)            Library Functions Manual            group_member(3)
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NAME

6       group_member - test whether a process is in a group
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LIBRARY

9       Standard C library (libc, -lc)
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SYNOPSIS

12       #include <unistd.h>
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14       int group_member(gid_t gid);
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16   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
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18       group_member():
19           _GNU_SOURCE
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DESCRIPTION

22       The  group_member()  function tests whether any of the caller's supple‐
23       mentary group IDs (as returned by getgroups(2)) matches gid.
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RETURN VALUE

26       The group_member() function returns nonzero if any of the caller's sup‐
27       plementary group IDs matches gid, and zero otherwise.
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STANDARDS

30       GNU.
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SEE ALSO

33       getgid(2), getgroups(2), getgrouplist(3), group(5)
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37Linux man-pages 6.04              2023-03-30                   group_member(3)