Asmttpd – Web server for Linux written in amd64 assembly

Re:Asmttpd – Web server for Linux written in amd64 assembly by eddyb on Tuesday May 19, 2015 @03:01PM (#9572325)

AFAIK Linux doesn't use zero-terminated strings anywhere in its syscalls, or at least not in those like write, where you pass a size alongside the buffer.

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Re:Asmttpd – Web server for Linux written in amd64 assembly by reipahb on Tuesday May 19, 2015 @03:34PM (#9572557)

However (almost?) all syscalls dealing with filesystem paths take null-terminated strings. See for example the implementation of the open() syscall:

https://github.com/torvalds/linux/blob/fb65d872d7a8dc629837a...

(Hence the need for the strncpy_from_user()-function: https://github.com/torvalds/linux/blob/fb65d872d7a8dc629837a...)

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Re:Asmttpd – Web server for Linux written in amd64 assembly by eddyb on Tuesday May 19, 2015 @05:29PM (#9573284)

Ahh, I totally missed the path arguments, my bad.

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Re:Asmttpd – Web server for Linux written in amd64 assembly by ranit on Tuesday May 19, 2015 @03:53PM (#9572674)

write() syscall writes a sequence of bytes (not string) therefore cannot use zero-terminated convention.

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Re:Asmttpd – Web server for Linux written in amd64 assembly by JoshTriplett on Tuesday May 19, 2015 @04:16PM (#9572826)

open takes a NUL-terminated filename.

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