MKTEMP(3)                            BSD                             MKTEMP(3)



NAME
     mktemp, mkstemp - make a unique filename

SYNOPSIS
     char *mktemp(template)
     char *template;

     fd = mkstemp(template)
     int fd;
     char *template;

DESCRIPTION
     mktemp creates a unique filename, typically in a temporary file system,
     by replacing template with a unique filename, and returns the address of
     the template.  The template should contain a filename with six trailing
     Xs, 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.