[Bug libc/2898] New: [improve] warning: the use of `mktemp' is dangerous, better use `mkstemp'

["jari dot aalto at cante dot net" <sourceware-bugzilla at sourceware dot org>]

This repost from 

  http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28310

in request of gcc maintainers to report this bug to glib. 

- - -

While compiling binutils-2.17 from (Debian) sources, gcc reports following:

    bucomm.o: In function `make_tempname':
    /usr/src/net/deb/src/binutils-2.17/binutils/bucomm.c:426: warning: the use\
 of `mktemp' is dangerous, better use `mkstemp'


The proper fix is to use `mkdtemp' in the code, but the error message
does not tell this. The developers may mistakenly disregard this
message when they think "Oh, I create directories and `mkstemp' cannot
create directories, so the warning does not apply to this code".

SUGGESTION

a) Add to the manual page, mkstemp.1, that this function works for files
   only. Add Crosss reference to mkdtemp and vice versa
   (from mkdtemp => mkstemp.1)

b) Implement better checking in gcc to differtiate directories from files
   when displaying warning about use of mktemp function.

   OR

   mention both mkstemp and mkdtemp in the warning message if the
   parser cannot know which is the case

- - -

Debian Release: testing/unstable
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'stable')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/dash
Kernel: Linux 2.6.16-2-686
Locale: LANG=C, LC_CTYPE=C (charmap=ISO-8859-1) (ignored: LC_ALL set to en_US)

Versions of packages gcc depends on:
ii  cpp                           4:4.1.1-3  The GNU C preprocessor (cpp)
ii  gcc-4.1                       4.1.1-7    The GNU C compiler

Versions of packages gcc recommends:
ii  libc6-dev [libc-dev]          2.3.6-15   GNU C Library: Development Librar\
i

-- 
           Summary: [improve]  warning: the use  of `mktemp' is dangerous,
                    better use `mkstemp'
           Product: glibc
           Version: 2.3.6
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: drepper at redhat dot com
        ReportedBy: jari dot aalto at cante dot net
                CC: glibc-bugs at sources dot redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=2898

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