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Anonymous Archived
syscall of the day: restart_sy(...) No.108799072
syscall of the day: restart_syscall  No.108799072 Archived
previous: >>108794806

#define __NR_restart_syscall        219

https://man7.org/linux/man-pages/man2/restart_syscall.2.html

tl;dr:
internal implementation detail

this isn't even exposed to userspace, so i don't have a ton to say about it. it's interesting that it exists, but that's about the extent of my thoughts on it

relevant resources: 
man man

man syscalls

https://man7.org/linux/man-pages/
https://linux.die.net/man/
https://elixir.bootlin.com/linux/
https://elixir.bootlin.com/musl/
https://elixir.bootlin.com/glibc/
>>
Anonymous
 No.108799224
 No.108799224
>>108799072
>this isn't even exposed to userspace
Is this the only such syscall (at least of those you've covered)?
>>
Anonymous
 No.108799287
 No.108799287
>>108799224
so far as i'm aware, yes
that i've covered so far, definitely yes
>>
Anonymous
 No.108799301
 No.108799301
>>108799072
whats the source of this picture?
>>
Anonymous
 No.108799401
 No.108799401
>>108799072
huh, that's an interesting one. you can call it yourself alright(either using a small wrapper or just writing the entire programme in assembly), but it seems to always return -4, ie -EINTR... Although I did not do exhaustive testing whether previous but (un)successful syscalls change that behaviour.
The manpage reports its return values to be the stopped syscall's return values, so without a preceding call it might be undefined? or it might just be hardcoded, hoo knows, don't have the time atm to look into the kernel source
>>
Anonymous
 No.108799407
 No.108799407
File: 342.png (40 KB, 278x658)
40 KB PNG
>>108799072
sex with Haruko
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