4.3BSD - /usr/man/cat3/mktemp.0

MKTEMP(3)                                                            MKTEMP(3)


NAME
       mktemp - make a unique file name

SYNOPSIS
       char *mktemp(template)
       char *template;

       mkstemp(template)
       char *template;

DESCRIPTION
       Mktemp creates a unique file name, typically in a temporary filesystem,
       by replacing template with a unique file name, and returns the  address
       of  the  template.   The  template  should contain a file name with six
       trailing X’s, which are replaced with the  current  process  id  and  a
       unique  letter.  Mkstemp makes the same replacement to the template but
       returns a file descriptor for the template file open  for  reading  and
       writing.   Mkstemp  avoids  the  race  between testing whether the file
       exists and opening it for use.

SEE ALSO
       getpid(2), open(2)

DIAGNOSTICS
       Mkstemp returns an open file descriptor upon success.  It returns -1 if
       no suitable file could be created.


7th Edition                      May 14, 1986                        MKTEMP(3)