Which unix-like programs are [not] difficult to port to Webassembly?

[martin12333]

partial list of functions, that are problemmatic in webassembly

• setjmp // but Emscripten has it https://emscripten.org/docs/porting/setjmp-longjmp.html

• fork,

• vfork // https://lisper.in/vfork-is-still-evil

• exec* ?

• posix_spawn

• dup2 ? , freopen ?

• TODO

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related: https://github.com/SamsungDForum/Webports ... webports is collection of open source libraries and applications that have been ported to Native Client, along with set of tools for building and maintaining them.
Some of them were ported to Emscripten also.