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13.118.17 getdtablesize

SUSv2 specification: https://pubs.opengroup.org/onlinepubs/7908799/xsh/getdtablesize.html

LSB specification:
https://refspecs.linuxbase.org/LSB_5.0.0/LSB-Core-generic/LSB-Core-generic/baselib-getdtablesize.html

Documentation:
man getdtablesize

Gnulib module: getdtablesize

Portability problems fixed by Gnulib:

• This function is missing on some platforms: Android LP64, mingw, MSVC 14, Android 9.0.
• This function is not declared on some platforms: Android 13 (LP32?).
• This function does not represent the true RLIMIT_NOFILE soft limit on some platforms: Android 13 (LP32?), Cygwin 1.7.25.

Portability problems not fixed by Gnulib:

• On OpenVMS, this function returns the maximum number of open file descriptors in a process. The possible values of file descriptors are not constrained by this function.