+++ /dev/null
-.\" Copyright (C) 1997 Andries Brouwer (aeb@cwi.nl)
-.\"
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-.\" 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
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-.\" responsibility for errors or omissions, or for damages resulting from
-.\" the use of the information contained herein. The author(s) may not
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-.\" %%%LICENSE_END
-.\"
-.\" Modified, 2003-05-26, Michael Kerrisk, <mtk.manpages@gmail.com>
-.TH SETRESUID 2 2014-09-21 "Linux" "Linux Programmer's Manual"
-.SH NAME
-setresuid, setresgid \- set real, effective and saved user or group ID
-.SH SYNOPSIS
-.BR "#define _GNU_SOURCE" " /* See feature_test_macros(7) */"
-.br
-.B #include <unistd.h>
-.sp
-.BI "int setresuid(uid_t " ruid ", uid_t " euid ", uid_t " suid );
-.br
-.BI "int setresgid(gid_t " rgid ", gid_t " egid ", gid_t " sgid );
-.SH DESCRIPTION
-.BR setresuid ()
-sets the real user ID, the effective user ID, and the
-saved set-user-ID of the calling process.
-
-Unprivileged user processes
-may change the real UID,
-effective UID, and saved set-user-ID, each to one of:
-the current real UID, the current effective UID or the
-current saved set-user-ID.
-
-Privileged processes (on Linux, those having the \fBCAP_SETUID\fP capability)
-may set the real UID, effective UID, and
-saved set-user-ID to arbitrary values.
-
-If one of the arguments equals \-1, the corresponding value is not changed.
-
-Regardless of what changes are made to the real UID, effective UID,
-and saved set-user-ID, the filesystem UID is always set to the same
-value as the (possibly new) effective UID.
-
-Completely analogously,
-.BR setresgid ()
-sets the real GID, effective GID, and saved set-group-ID
-of the calling process (and always modifies the filesystem GID
-to be the same as the effective GID),
-with the same restrictions for unprivileged processes.
-.SH RETURN VALUE
-On success, zero is returned.
-On error, \-1 is returned, and
-.I errno
-is set appropriately.
-
-.IR Note :
-there are cases where
-.BR setresuid ()
-can fail even when the caller is UID 0;
-it is a grave security error to omit checking for a failure return from
-.BR setresuid ().
-.SH ERRORS
-.TP
-.B EAGAIN
-The call would change the caller's real UID (i.e.,
-.I ruid
-does not match the caller's real UID),
-but there was a temporary failure allocating the
-necessary kernel data structures.
-.TP
-.B EAGAIN
-.I ruid
-does not match the caller's real UID and this call would
-bring the number of processes belonging to the real user ID
-.I ruid
-over the caller's
-.B RLIMIT_NPROC
-resource limit.
-Since Linux 3.1, this error case no longer occurs
-(but robust applications should check for this error);
-see the description of
-.B EAGAIN
-in
-.BR execve (2).
-.TP
-.B EINVAL
-One or more of the target user or group IDs
-is not valid in this user namespace.
-.TP
-.B EPERM
-The calling process is not privileged (did not have the \fBCAP_SETUID\fP
-capability) and tried to change the IDs to values that are not permitted.
-.SH VERSIONS
-These calls are available under Linux since Linux 2.1.44.
-.SH CONFORMING TO
-These calls are nonstandard;
-they also appear on HP-UX and some of the BSDs.
-.SH NOTES
-Under HP-UX and FreeBSD, the prototype is found in
-.IR <unistd.h> .
-Under Linux, the prototype is provided by glibc since version 2.3.2.
-
-The original Linux
-.BR setresuid ()
-and
-.BR setresgid ()
-system calls supported only 16-bit user and group IDs.
-Subsequently, Linux 2.4 added
-.BR setresuid32 ()
-and
-.BR setresgid32 (),
-supporting 32-bit IDs.
-The glibc
-.BR setresuid ()
-and
-.BR setresgid ()
-wrapper functions transparently deal with the variations across kernel versions.
-.SH SEE ALSO
-.BR getresuid (2),
-.BR getuid (2),
-.BR setfsgid (2),
-.BR setfsuid (2),
-.BR setreuid (2),
-.BR setuid (2),
-.BR capabilities (7),
-.BR credentials (7),
-.BR user_namespaces (7)
-.SH COLOPHON
-This page is part of release 3.79 of the Linux
-.I man-pages
-project.
-A description of the project,
-information about reporting bugs,
-and the latest version of this page,
-can be found at
-\%http://www.kernel.org/doc/man\-pages/.
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