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-.\" Copyright (c) 1989, 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.
-.\"
-.\"     @(#)mktemp.3	8.1 (Berkeley) 6/4/93
-.\"
-.Dd June 4, 1993
-.Dt MKTEMP 3
-.Os
-.Sh NAME
-.Nm mktemp
-.Nd make temporary file name (unique)
-.Sh SYNOPSIS
-.Fd #include <unistd.h>
-.Ft char *
-.Fn mktemp "char *template"
-.Ft int
-.Fn mkstemp "char *template"
-.Sh DESCRIPTION
-The
-.Fn mktemp
-function
-takes the given file name template and overwrites a portion of it
-to create a file name.
-This file name is unique and suitable for use
-by the application.
-The template may be any file name with some number of
-.Ql X Ns s
-appended
-to it, for example
-.Pa /tmp/temp.XXXX .
-The trailing
-.Ql X Ns s
-are replaced with the current process number and/or a
-unique letter combination.
-The number of unique file names
-.Fn mktemp
-can return depends on the number of
-.Ql X Ns s
-provided; six
-.Ql X Ns s
-will
-result in
-.Fn mktemp
-testing roughly 26 ** 6 combinations.
-.Pp
-The
-.Fn mkstemp
-function
-makes the same replacement to the template and creates the template file,
-mode 0600, returning a file descriptor opened for reading and writing.
-This avoids the race between testing for a file's existence and opening it
-for use.
-.Sh RETURN VALUES
-The
-.Fn mktemp
-function
-returns a pointer to the template on success and
-.Dv NULL
-on failure.
-The
-.Fn mkstemp
-function
-returns \-1 if no suitable file could be created.
-If either call fails an error code is placed in the global variable
-.Va errno .
-.Sh ERRORS
-The
-.Fn mktemp
-and
-.Fn mkstemp
-functions
-may set
-.Va errno
-to one of the following values:
-.Bl -tag -width [ENOTDIR]
-.It Bq Er ENOTDIR
-The pathname portion of the template is not an existing directory.
-.El
-.Pp
-The
-.Fn mktemp
-and
-.Fn mkstemp
-functions
-may also set
-.Va errno
-to any value specified by the
-.Xr stat 2
-function.
-.Pp
-The
-.Fn mkstemp
-function
-may also set
-.Va errno
-to any value specified by the
-.Xr open 2
-function.
-.Sh NOTES
-A common problem that results in a core dump is that the programmer
-passes in a read-only string to 
-.Fn mktemp
-or 
-.Fn mkstemp .
-This is common with programs that were developed before 
-.St -ansiC
-compilers were common.
-For example, calling
-.Fn mkstemp 
-with an argument of 
-.Qq /tmp/tempfile.XXXXXX
-will result in a core dump due to 
-.Fn mkstemp
-attempting to modify the string constant that was given.
-If the program in question makes heavy use of that type
-of function call, you do have the option of compiling the program
-so that it will store string constants in a writable segment of memory.  
-See
-.Xr gcc 1
-for more information.
-.Sh SEE ALSO
-.Xr chmod 2 ,
-.Xr getpid 2 ,
-.Xr open 2 ,
-.Xr stat 2
-.Sh HISTORY
-A
-.Nm mktemp
-function appeared in
-.At v7 .