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.
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.
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.
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