and a man page

2 files changed, 61 insertions, 2 deletions

diff --git a/lib/libc/sys/Makefile.inc b/lib/libc/sys/Makefile.inc
index d1634173f2c..67365000738 100644
--- a/lib/libc/sys/Makefile.inc
+++ b/lib/libc/sys/Makefile.inc
@@ -20,7 +20,8 @@ ASM=	accept.o access.o acct.o adjtime.o bind.o chdir.o chflags.o chmod.o \
 	fstatfs.o fsync.o futimes.o getdirentries.o getegid.o geteuid.o \
 	getfh.o getfsstat.o getgid.o getgroups.o getitimer.o getpeername.o \
 	getpgrp.o getpid.o getppid.o getpriority.o getrlimit.o getrusage.o \
-	getsockname.o getsockopt.o gettimeofday.o getuid.o ioctl.o kill.o \
+	getsockname.o getsockopt.o gettimeofday.o getuid.o issetugid.o \
+	ioctl.o kill.o \
 	ktrace.o lfs_bmapv.o lfs_markv.o lfs_segclean.o lfs_segwait.o link.o \
 	listen.o lstat.o madvise.o mincore.o minherit.o mkdir.o mkfifo.o \
 	mknod.o mlock.o \
@@ -110,7 +111,8 @@ MAN+=	accept.2 access.2 acct.2 adjtime.2 bind.2 brk.2 chdir.2 chflags.2 \
 	fcntl.2 flock.2 fork.2 fsync.2 getdirentries.2 getfh.2 getfsstat.2 \
 	getgid.2 getgroups.2 getitimer.2 getlogin.2 getpeername.2 getpgrp.2 \
 	getpid.2 getpriority.2 getrlimit.2 getrusage.2 getsockname.2 \
-	getsockopt.2 gettimeofday.2 getuid.2 intro.2 ioctl.2 kill.2 link.2 \
+	getsockopt.2 gettimeofday.2 getuid.2 intro.2 issetugid.2 ioctl.2 \
+	kill.2 link.2 \
 	listen.2 lseek.2 mkdir.2 mkfifo.2 mknod.2 madvise.2 mincore.2 \
 	minherit.2 mlock.2 \
 	mmap.2 mount.2 mprotect.2 msync.2 munmap.2 nfssvc.2 open.2 pathconf.2 \
diff --git a/lib/libc/sys/issetugid.2 b/lib/libc/sys/issetugid.2
new file mode 100644
index 00000000000..82987415136
--- /dev/null
+++ b/lib/libc/sys/issetugid.2
@@ -0,0 +1,57 @@
+.\"
+.\" Copyright (c) 1980, 1991, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.Dd June 4, 1993
+.Dt GETUID 2
+.Os BSD 4
+.Sh NAME
+.Nm issetugid
+.Nd is current executable running setuid or setgid
+.Sh SYNOPSIS
+.Fd #include <unistd.h>
+.Ft int
+.Fn issetugid void
+.Sh DESCRIPTION
+The
+.Fn issetugid
+function returns 1 if the process was made setuid or setgid as
+the result of the last
+.Fn execve
+system call.
+Otherwise it returns 0.
+.Sh ERRORS
+The
+.Fn getuid
+and
+.Fn geteuid
+functions are always successful, and no return value is reserved to
+indicate an error.