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Anonymous Archived
syscall of the day: send/recvm(...) 02/15/26(Sun)14:29:19 No.108155678
File: 1714077570991766.jpg (74 KB, 640x430)
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syscall of the day: send/recvmsg Anonymous 02/15/26(Sun)14:29:19 No.108155678 Archived
previous: >>108145461

#define __NR_sendmsg            46
#define __NR_recvmsg            47

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

preeeetty much the same exact thread as yesterday. only reason i didn't combine them was cause 4 at once seemed a bit much. plus, this one has the cool struct that could maybe be discussed a bit more.
so, y'know. feel free to discuss it. or don't. i'm not a cop

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
02/15/26(Sun)14:37:37 No.108155720
Anonymous 02/15/26(Sun)14:37:37 No.108155720
what does 46 and 47 do
>>
Anonymous
02/15/26(Sun)14:43:45 No.108155771
Anonymous 02/15/26(Sun)14:43:45 No.108155771
>>108155720
they're magic numbers !
>>
Anonymous
02/15/26(Sun)14:49:16 No.108155813
Anonymous 02/15/26(Sun)14:49:16 No.108155813
>>108155678
>le jolly exclamation point
>epic themed thread
Go back to plebbit, you insufferable faggot
>>
Anonymous
02/15/26(Sun)14:49:26 No.108155816
Anonymous 02/15/26(Sun)14:49:26 No.108155816
i fucking love sockets!!!
>>
Anonymous
02/15/26(Sun)14:55:07 No.108155848
Anonymous 02/15/26(Sun)14:55:07 No.108155848
>>108155813
someone's grumpy..... i just happen to be in a good mood today, sheesh
>>
Anonymous
02/15/26(Sun)18:36:28 No.108157536
Anonymous 02/15/26(Sun)18:36:28 No.108157536
bampu
>>
Anonymous
02/15/26(Sun)18:40:37 No.108157563
Anonymous 02/15/26(Sun)18:40:37 No.108157563
>>108155720
46 definitely is, I see it everywhere and that is why it is remarkable. 47 is remarkable for a whole different reason. I never see it anywhere.
>>
Anonymous
02/15/26(Sun)18:44:45 No.108157591
Anonymous 02/15/26(Sun)18:44:45 No.108157591
>>108155813
Nothing wrong with exclamation marks! faggot!!
>>
Anonymous
02/15/26(Sun)21:13:00 No.108158590
Anonymous 02/15/26(Sun)21:13:00 No.108158590
>>108155720
is your question a serious one?
in case it is: they're the numbers that get put into the rax register when the syscall instruction is invoked.

>struct msghdr
these old UNIX structs with tons of fields are always a treat, lmao. especially when some of them are literally described as ancillary
>>
Anonymous
02/15/26(Sun)21:37:20 No.108158737
Anonymous 02/15/26(Sun)21:37:20 No.108158737
File: 1747934791759700.jpg (108 KB, 640x480)
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>>108155678
I love these threads
Thank you for making these threads
I'm usually too dumb to understand but the man pages help a lot
I'm learning more about the OS I'm running!!
>>
Anonymous
02/15/26(Sun)21:52:00 No.108158832
Anonymous 02/15/26(Sun)21:52:00 No.108158832
>>108155678
whoever makes these, I love you
>>
Anonymous
02/15/26(Sun)22:01:40 No.108158880
Anonymous 02/15/26(Sun)22:01:40 No.108158880
>>108158590
not always the rax register :-) some of us use ARM
>>
Anonymous
02/15/26(Sun)22:02:48 No.108158887
Anonymous 02/15/26(Sun)22:02:48 No.108158887
File: 1770580558586136.jpg (65 KB, 736x621)
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65 KB JPG
>>108158737
>>108158832
i-i love y-you, too, anons....
>>
Anonymous
02/16/26(Mon)03:13:16 No.108160276
Anonymous 02/16/26(Mon)03:13:16 No.108160276
rescued from page 10!
>>
Anonymous
02/16/26(Mon)05:24:56 No.108160871
Anonymous 02/16/26(Mon)05:24:56 No.108160871
packet > stream
imagine wasting time parsing shit instead of just casting the msg
>>
Anonymous
02/16/26(Mon)06:17:44 No.108161128
Anonymous 02/16/26(Mon)06:17:44 No.108161128
>>108158880
>>108158880
fight arm erasure!
I've done syscall tinkering in x64 and riscv, what's the abi using arm? is it sys or ecall?!
>>
Anonymous
02/16/26(Mon)06:25:06 No.108161176
Anonymous 02/16/26(Mon)06:25:06 No.108161176
>>108160276
Thanks, I would have missed today's thread.
>>
Anonymous
02/16/26(Mon)06:29:36 No.108161203
Anonymous 02/16/26(Mon)06:29:36 No.108161203
>>108155678
Fuck OP for posting an unfunny tranny reddit meme.
>>
Anonymous
02/16/26(Mon)09:13:23 No.108162103
Anonymous 02/16/26(Mon)09:13:23 No.108162103
>>108161203
the next OP image is just for you, babe
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