From 399644e47874bff147afb19c89228901ac39340e Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 15 Apr 2024 21:40:15 +0200 Subject: Adding upstream version 6.05.01. Signed-off-by: Daniel Baumann --- man2/getuid.2 | 80 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 man2/getuid.2 (limited to 'man2/getuid.2') diff --git a/man2/getuid.2 b/man2/getuid.2 new file mode 100644 index 0000000..1b94158 --- /dev/null +++ b/man2/getuid.2 @@ -0,0 +1,80 @@ +.\" Copyright 1993 Rickard E. Faith (faith@cs.unc.edu) +.\" +.\" SPDX-License-Identifier: Linux-man-pages-copyleft +.\" +.\" Historical remark, aeb, 2004-06-05 +.TH getuid 2 2023-03-30 "Linux man-pages 6.05.01" +.SH NAME +getuid, geteuid \- get user identity +.SH LIBRARY +Standard C library +.RI ( libc ", " \-lc ) +.SH SYNOPSIS +.nf +.B #include +.PP +.B uid_t getuid(void); +.B uid_t geteuid(void); +.fi +.SH DESCRIPTION +.BR getuid () +returns the real user ID of the calling process. +.PP +.BR geteuid () +returns the effective user ID of the calling process. +.SH ERRORS +These functions are always successful +and never modify +.\" https://www.austingroupbugs.net/view.php?id=511 +.\" 0000511: getuid and friends should not modify errno +.IR errno . +.SH STANDARDS +POSIX.1-2008. +.SH HISTORY +POSIX.1-2001, 4.3BSD. +.PP +In UNIX\ V6 the +.BR getuid () +call returned +.IR "(euid << 8) + uid" . +UNIX\ V7 introduced separate calls +.BR getuid () +and +.BR geteuid (). +.PP +The original Linux +.BR getuid () +and +.BR geteuid () +system calls supported only 16-bit user IDs. +Subsequently, Linux 2.4 added +.BR getuid32 () +and +.BR geteuid32 (), +supporting 32-bit IDs. +The glibc +.BR getuid () +and +.BR geteuid () +wrapper functions transparently deal with the variations across kernel versions. +.PP +On Alpha, instead of a pair of +.BR getuid () +and +.BR geteuid () +system calls, a single +.BR getxuid () +system call is provided, which returns a pair of real and effective UIDs. +The glibc +.BR getuid () +and +.BR geteuid () +wrapper functions transparently deal with this. +See +.BR syscall (2) +for details regarding register mapping. +.SH SEE ALSO +.BR getresuid (2), +.BR setreuid (2), +.BR setuid (2), +.BR credentials (7) -- cgit v1.2.3