A ticket to collect issues and bugs with Emscripten. We want to report them upstream eventually.

• Emscripten defines IPPROTO_SCTP, but socket(AF_INET, SOCK_STREAM, IPPROTO_SCTP) causes an abort, socket: return EPROTONOSUPPORT on invalid protocol emscripten-core/emscripten#16479
• clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME, &timeout_abs, NULL) does not work as expected, causes time.sleep to hang forever. nanosleep(&timeout_ts, NULL) works. clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME) sleeps forever emscripten-core/emscripten#16453
• freeaddrinfo crash Segfault in freeaddrinfo, memory leak in getaddrinfo emscripten-core/emscripten#16081
• strftime mishandles quoted percent, strftime() mishandles quoted percent, e.g. %%z emscripten-core/emscripten#16155
• week number of strftime("%U") and %W wrong week number of strftime("%U") and %W wrong emscripten-core/emscripten#16156
• mkfifo() and mknod() create regular file mkfifo() and mknod() create regular file with NODERAWFS=1 emscripten-core/emscripten#16158
• opendir / open(O_DIRECTORY) leaks file directory NODERAWFS open() O_DIRECTORY / opendir() leak file descriptor on error emscripten-core/emscripten#16452
• msync() on anonymous mapping fails, msync() on anonymous mapping fails with TypeError: Cannot read property 'stream_ops' of undefined emscripten-core/emscripten#16350
• fstat does not work on pipes, fstat doesn't work on pipes emscripten-core/emscripten#16414 and bpo-40280: Skip dysfunctional pipe tests on Emscripten (GH-31770) python/cpython#31770
• fstat does not work on unlinked file
• Blocking socket accept() fails with TypeError: Cannot read property 'stream' of undefined, Fail blocking socket operations loudly emscripten-core/emscripten#16047
• utimensat sets wrong atime and mtime, NODERAWFS: utime, utimensat set wrong atime and mtime (overflow issue?) emscripten-core/emscripten#16458
• umask is stubbed
• select does not support non-NULL exceptfds, crashes with assertion error. CPython workaround bpo-40280: select: Use NULL for empty fdset (GH-31865) python/cpython#31865
• strftime %V issue, Fix edge case in strftime %V (ISO 8601 week number) emscripten-core/emscripten#16494