mirror of https://github.com/mkerrisk/man-pages
67 lines
2.0 KiB
Groff
67 lines
2.0 KiB
Groff
.\" Copyright 1993 Rickard E. Faith (faith@cs.unc.edu)
|
|
.\"
|
|
.\" %%%LICENSE_START(VERBATIM)
|
|
.\" Permission is granted to make and distribute verbatim copies of this
|
|
.\" manual provided the copyright notice and this permission notice are
|
|
.\" preserved on all copies.
|
|
.\"
|
|
.\" Permission is granted to copy and distribute modified versions of this
|
|
.\" manual under the conditions for verbatim copying, provided that the
|
|
.\" entire resulting derived work is distributed under the terms of a
|
|
.\" permission notice identical to this one.
|
|
.\"
|
|
.\" Since the Linux kernel and libraries are constantly changing, this
|
|
.\" manual page may be incorrect or out-of-date. The author(s) assume no
|
|
.\" responsibility for errors or omissions, or for damages resulting from
|
|
.\" the use of the information contained herein. The author(s) may not
|
|
.\" have taken the same level of care in the production of this manual,
|
|
.\" which is licensed free of charge, as they might when working
|
|
.\" professionally.
|
|
.\"
|
|
.\" Formatted or processed versions of this manual, if unaccompanied by
|
|
.\" the source, must acknowledge the copyright and authors of this work.
|
|
.\" %%%LICENSE_END
|
|
.\"
|
|
.TH GETGID 2 2015-08-08 "Linux" "Linux Programmer's Manual"
|
|
.SH NAME
|
|
getgid, getegid \- get group identity
|
|
.SH SYNOPSIS
|
|
.B #include <unistd.h>
|
|
.br
|
|
.B #include <sys/types.h>
|
|
.sp
|
|
.B gid_t getgid(void);
|
|
.br
|
|
.B gid_t getegid(void);
|
|
.SH DESCRIPTION
|
|
.BR getgid ()
|
|
returns the real group ID of the calling process.
|
|
|
|
.BR getegid ()
|
|
returns the effective group ID of the calling process.
|
|
.SH ERRORS
|
|
These functions are always successful.
|
|
.SH CONFORMING TO
|
|
POSIX.1-2001, POSIX.1-2008, 4.3BSD.
|
|
.SH NOTES
|
|
The original Linux
|
|
.BR getgid ()
|
|
and
|
|
.BR getegid ()
|
|
system calls supported only 16-bit group IDs.
|
|
Subsequently, Linux 2.4 added
|
|
.BR getgid32 ()
|
|
and
|
|
.BR getegid32 (),
|
|
supporting 32-bit IDs.
|
|
The glibc
|
|
.BR getgid ()
|
|
and
|
|
.BR getegid ()
|
|
wrapper functions transparently deal with the variations across kernel versions.
|
|
.SH SEE ALSO
|
|
.BR getresgid (2),
|
|
.BR setgid (2),
|
|
.BR setregid (2),
|
|
.BR credentials (7)
|