NAME

       mktemp - make a unique filename (LEGACY)

SYNOPSIS

       #include <stdlib.h>

       char *mktemp(char *template);

DESCRIPTION

       The mktemp() function shall replace the contents of the string pointed to by template by a
       unique filename and return template. The application shall initialize  template  to  be  a
       filename  with  six  trailing  'X'  s;  mktemp() shall replace each 'X' with a single byte
       character from the portable filename character set.

RETURN VALUE

       The mktemp() function shall return the pointer template.   If  a  unique  name  cannot  be
       created, template shall point to a null string.

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

   Generating a Filename
       The  following  example replaces the contents of the "template" string with a 10-character
       filename beginning with the characters "file" and returns  a  pointer  to  the  "template"
       string that contains the new filename.

              #include <stdlib.h>
              ...
              char *template = "/tmp/fileXXXXXX";
              char *ptr;

              ptr = mktemp(template);

APPLICATION USAGE

       Between  the time a pathname is created and the file opened, it is possible for some other
       process to create a file with the same name. The mkstemp() function  avoids  this  problem
       and is preferred over this function.

RATIONALE

       None.

FUTURE DIRECTIONS

       This function may be withdrawn in a future version.

SEE ALSO

       mkstemp()  ,  tmpfile()  , tmpnam() , the Base Definitions volume of IEEE Std 1003.1-2001,
       <stdlib.h>

COPYRIGHT

       Portions of this text are reprinted and  reproduced  in  electronic  form  from  IEEE  Std
       1003.1,  2003  Edition,  Standard  for Information Technology -- Portable Operating System
       Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003  by
       the  Institute  of  Electrical  and  Electronics Engineers, Inc and The Open Group. In the
       event of any discrepancy between this version and the original IEEE  and  The  Open  Group
       Standard,  the  original  IEEE  and  The  Open Group Standard is the referee document. The
       original Standard can be obtained online at http://www.opengroup.org/unix/online.html .