mkstemp(3C)						   Standard C Library Functions 					       mkstemp(3C)

NAME

       mkstemp - make a unique file name from a template and open the file

SYNOPSIS

       #include <stdlib.h>

       int mkstemp(char *template);

DESCRIPTION

       The  mkstemp() function replaces the contents of the string pointed to by template by a unique file name, and returns a file descriptor for
       the file open for reading and writing.  The function thus prevents any possible race condition between testing whether the file exists  and
       opening it for use.  The string in template should look like a file name with six trailing 'X's; mkstemp() replaces each 'X' with a charac-
       ter from the portable file name character set. The characters are chosen such that the resulting name does not duplicate  the  name  of	an
       existing file.

RETURN VALUES

       Upon successful completion, mkstemp() returns an open file descriptor.  Otherwise -1 is returned if no suitable file could be created.

ERRORS

       No errors are defined.

USAGE

       It is possible to run out of letters.

       The mkstemp() function does not check to determine whether the file name part of template exceeds the maximum allowable file name length.

       The tmpfile(3C) function is preferred over this function.

       The  mkstemp() function is frequently used to create a temporary file that will be removed by the application before the application termi-
       nates.

       The mkstemp() function has a transitional interface for 64-bit file offsets.  See lf64(5).

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       getpid(2), open(2), tmpfile(3C), tmpnam(3C), attributes(5), lf64(5), standards(5)

SunOS 5.10							    15 Sep 2004 						       mkstemp(3C)