tmpnam
Synopsis
#include <stdio.h>
char *tmpnam(char *s);
Status
Partially implemented
Conformance
IEEE Std 1003.1-2017
Description
The tmpnam() function shall generate a string that is a valid path name that does not name an existing file. The
function is potentially capable of generating TMP_MAX different strings, but any or all of them may already be in
use by existing files and thus not be suitable return values.
The tmpnam() function generates a different string each time it is called from the same process, up to TMP_MAX
times. If it is called more than TMP_MAX times, the behavior is implementation-defined.
The implementation shall behave as if no function defined in this volume of POSIX.1-2017, except tempnam(), calls
tmpnam().
The tmpnam() function need not be thread-safe if called with a NULL parameter.
Return value
Upon successful completion, tmpnam() shall return a pointer to a string. If no suitable string can be generated, the
tmpnam() function shall return a null pointer.
If the argument s is a null pointer, tmpnam() shall leave its result in an internal static object and return a
pointer to that object. Subsequent calls to tmpnam() may modify the same object. If the argument s is not a null
pointer, it is presumed to point to an array of at least L_tmpnam chars; tmpnam() shall write its result in that
array and shall return the argument as its value.
Errors
No errors are defined.
Tests
Untested
Known bugs
None