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Diffstat (limited to 'man3/group_member.3')
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diff --git a/man3/group_member.3 b/man3/group_member.3 new file mode 100644 index 0000000..620b59f --- /dev/null +++ b/man3/group_member.3 @@ -0,0 +1,48 @@ +.\" Copyright (C) 2014, Michael Kerrisk <mtk.manpages@gmail.com> +.\" +.\" SPDX-License-Identifier: Linux-man-pages-copyleft +.\" +.TH group_member 3 2023-03-30 "Linux man-pages 6.05.01" +.SH NAME +group_member \- test whether a process is in a group +.SH LIBRARY +Standard C library +.RI ( libc ", " \-lc ) +.SH SYNOPSIS +.nf +.B #include <unistd.h> +.PP +.BI "int group_member(gid_t " gid ); +.fi +.PP +.RS -4 +Feature Test Macro Requirements for glibc (see +.BR feature_test_macros (7)): +.RE +.PP +.BR group_member (): +.nf + _GNU_SOURCE +.fi +.SH DESCRIPTION +The +.BR group_member () +function tests whether any of the caller's supplementary group IDs +(as returned by +.BR getgroups (2)) +matches +.IR gid . +.SH RETURN VALUE +The +.BR group_member () +function returns nonzero if any of the caller's +supplementary group IDs matches +.IR gid , +and zero otherwise. +.SH STANDARDS +GNU. +.SH SEE ALSO +.BR getgid (2), +.BR getgroups (2), +.BR getgrouplist (3), +.BR group (5) |