---

10.69.12 dup3 ¶

POSIX specification:
https://pubs.opengroup.org/onlinepubs/9799919799/functions/dup3.html

Documentation:
man dup3

Gnulib module: dup3

Portability problems fixed by Gnulib:

• This function is missing on many non-glibc platforms: glibc 2.8, macOS 14, FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8, AIX 5.1, HP-UX 11, Solaris 11.3, Cygwin 1.7.1, mingw, MSVC 14, Android 4.4.
• This function can crash on some platforms: Cygwin 1.7.25.
• This function mistakenly succeeds when given two equal file descriptors on some platforms: NetBSD 10.0.

Portability problems not fixed by Gnulib: