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


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Anonymous
syscall of the day: rt_sigproc(...) 01/17/26(Sat)08:10:48 No.107889612

File: 1737614926255440.jpg (127 KB, 2048x1344)

syscall of the day: rt_sigprocmask Anonymous 01/17/26(Sat)08:10:48 No.107889612

previous: >>107878988
#define __NR_rt_sigprocmask        14
https://man7.org/linux/man-pages/man2/sigprocmask.2.html

today's thread is again mostly a continuation of the previous thread's discussion. we will focus on linux signals in general. from the manpage, these two excerpts are what i feel is the most interesting:
>It is not possible to block SIGKILL or SIGSTOP. Attempts to do so are silently ignored.
this one makes sense if you understand the reasoning behind it, but i have seen many questions on this in the past. definitely a topic worth discussing
>Each of the threads in a process has its own signal mask.
this is useful because it is powerful, but it is also really annoying in its complexity, lol
i guess honorable mention to the note about undefined behavior, as well

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
01/17/26(Sat)08:12:55 No.107889630

Anonymous 01/17/26(Sat)08:12:55 No.107889630

I believe that Signals are divine punishment for our past and future sins

Anonymous
01/17/26(Sat)08:18:21 No.107889685

Anonymous 01/17/26(Sat)08:18:21 No.107889685

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I’m just dropping by to say never stop making these threads. In a sea of e-celebs and consoomer shit flinging, it’s anons like you that actually make /g/ a somewhat tolerable place.

Anonymous
01/17/26(Sat)08:23:01 No.107889720

Anonymous 01/17/26(Sat)08:23:01 No.107889720

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>>107889685
i'm doing my part

Anonymous
01/17/26(Sat)08:37:03 No.107889822

Anonymous 01/17/26(Sat)08:37:03 No.107889822

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>>107889612
In multithreaded programs I’ll usually have a dedicated signal handling thread that’s responsible for capturing signals, translating them to a broader program “intent” (clean shutdown, etc…), and communicating said intent with the rest of the system in a controlled manner. All other threads are configured to ignore the raw signals. Obviously all bets are off if you get a SIGKILL or SIGSTOP

Anonymous
01/17/26(Sat)09:51:10 No.107890345

Anonymous 01/17/26(Sat)09:51:10 No.107890345

>>107889612
I don't like signals. NT and every microkernel got it right with a proper event system.

Anonymous
01/17/26(Sat)10:13:12 No.107890493

Anonymous 01/17/26(Sat)10:13:12 No.107890493

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>>107889612
>literal karen board
>ever being cute

Anonymous
01/17/26(Sat)11:08:03 No.107890852

Anonymous 01/17/26(Sat)11:08:03 No.107890852

>>107889612
[s4s] is full of discord troons now i stopped posting there kys
.t the original yuji sakai

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