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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | ERRORS | VERSIONS | STANDARDS | HISTORY | SEE ALSO | COLOPHON |
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getgid(2) System Calls Manual getgid(2)
getgid, getegid - get group identity
Standard C library (libc, -lc)
#include <unistd.h>
gid_t getgid(void);
gid_t getegid(void);
getgid() returns the real group ID of the calling process.
getegid() returns the effective group ID of the calling process.
These functions are always successful and never modify errno.
On Alpha, instead of a pair of getgid() and getegid() system
calls, a single getxgid() system call is provided, which returns
a pair of real and effective GIDs. The glibc getgid() and
getegid() wrapper functions transparently deal with this. See
syscall(2) for details regarding register mapping.
POSIX.1-2008.
POSIX.1-2001, 4.3BSD.
The original Linux getgid() and getegid() system calls supported
only 16-bit group IDs. Subsequently, Linux 2.4 added getgid32()
and getegid32(), supporting 32-bit IDs. The glibc getgid() and
getegid() wrapper functions transparently deal with the
variations across kernel versions.
getresgid(2), setgid(2), setregid(2), credentials(7)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.9.1.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2024-06-26. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not
part of the original manual page), send a mail to
[email protected]
Linux man-pages 6.9.1 2024-05-02 getgid(2)
Pages that refer to this page: groups(1@@shadow-utils), ps(1), strace(1), getgroups(2), setgid(2), setreuid(2), syscalls(2), group_member(3), id_t(3type), credentials(7), signal-safety(7), user_namespaces(7)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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