[Bug libc/13908] New: mktemp() incorrectly flagged with __wur in stdlib.h

["dvw at phas dot ubc.ca" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=13908

             Bug #: 13908
           Summary: mktemp() incorrectly flagged with __wur in stdlib.h
           Product: glibc
           Version: 2.15
            Status: NEW
          Severity: minor
          Priority: P2
         Component: libc
        AssignedTo: unassigned@sourceware.org
        ReportedBy: dvw@phas.ubc.ca
                CC: drepper.fsp@gmail.com
    Classification: Unclassified


stdlib.h contains:

/* Generate a unique temporary file name from TEMPLATE.
   The last six characters of TEMPLATE must be "XXXXXX";
   they are replaced with a string that makes the file name unique.
   Returns TEMPLATE, or a null pointer if it cannot get a unique file name.  */
extern char *mktemp (char *__template) __THROW __nonnull ((1)) __wur;



The documentation here is incorrect: mktemp() always returns TEMPLATE, and sets
template[0] to 0 on failure, as required by POSIX.

Consequently, this declaration should not be marked with __wur.  The caller
gains no information by inspecting the return value of mktemp().  (Instead, it
should be checking template[0] to detect failure.)

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