/g/ - syscall of the day: rt_sigsuspend - Technology


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Anonymous
syscall of the day: rt_sigsusp(...) 04/01/26(Wed)09:58:53 No.108500959

File: 1737529510764837.png (6 KB, 424x81)

syscall of the day: rt_sigsuspend Anonymous 04/01/26(Wed)09:58:53 No.108500959

previous: >>108492651
#define __NR_rt_sigsuspend        130
https://man7.org/linux/man-pages/man2/sigsuspend.2.html

tl;dr:
wait for a signal

i really thought this was going to temporarily block a signal, but nope lol. it blocks the thread while waiting for a signal. nevermind that we just had rt_sigtimedwait
it also temporarily updates the thread's sigset mask, which is something, i guess. still seems like a useless syscall imo
but, like all the others, since it's in there, *someone* must have (had?) a use for it
thankfully this is the last of the rt_* syscalls

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
04/01/26(Wed)10:38:48 No.108501206

Anonymous 04/01/26(Wed)10:38:48 No.108501206

>>108500959
I guess you would use this if one thread has to wake up another one and you don't want to pout it in a loop idk.

Anonymous
04/01/26(Wed)11:10:47 No.108501411

Anonymous 04/01/26(Wed)11:10:47 No.108501411

this is actually something that is perfect for my usecase. I have potentially multiple listeners that wait for updates on some data. I don't think I can use condition variables because I've written the program in D.

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