9.567 mkstemp

POSIX specification:
http://www.opengroup.org/onlinepubs/9699919799/functions/mkstemp.html

Gnulib module: mkstemp

Portability problems fixed by Gnulib:

• This function is missing on some platforms: mingw, MSVC 9.
• This function is declared in <unistd.h> instead of <stdlib.h> on some platforms: Mac OS X 10.3.
• On some platforms (HP-UX 10.20, SunOS 4.1.4, Solaris 2.5.1), mkstemp has a silly limit that it can create no more than 26 files from a given template. On OSF/1 4.0f, it can create only 32 files per process.
• On platforms where off_t is a 32-bit type, mkstemp may not work correctly to create files larger than 2 GB. (Cf. AC_SYS_LARGEFILE.)
• On some older platforms, mkstemp can create a world or group writable or readable file, if you haven’t set the process umask to 077. This is a security risk.

Portability problems not fixed by Gnulib:

The gnulib module clean-temp can create temporary files that will not be left behind after signals such as SIGINT.