SYD-SYS(1)

💅 SYD-SYS(1) — okay bestie, let's look things up

So this is from the General Commands Manual section of your life, and it's literally called syd-sys 💖

✨ NAME ✨

syd-sys — look up syscalls, errnos, ioctls, open flags, and signals by number or by regular expression 🎀

🌸 SYNOPSIS 🌸

syd-sys [-heios] [-a arch] number|regex

syd-sys -a list

syd-sys [-uU]

🦋 DESCRIPTION 🦋

Okay so here's the vibe: you hand it a number, and syd-sys prints the matching syscall name. Slay. 🫶

Hand it a regex instead and it prints the syscall names that match — and yes, the matching is case-insensitive, no cap.

• Hit -e to query errno(3) numbers.
• Hit -i to query ioctl(2) requests.
• Hit -o to query open(2) flags.
• Hit -s to query signal(7) numbers.
• Hit -u to list UNIX domain socket inodes and names using netlink(7).
• Hit -U to list UNIX domain socket inodes and names using proc_net(5).

For both -u and -U, each line is the inode and the name, separated by a tab. Abstract sockets get a @ in front of them, and unnamed sockets are displayed as !unnamed. That's the whole format, periodt. ⭐

💅 OPTIONS 💅

• -h — display help 🙈
• -a — specify an alternative architecture, like x86, x86_64 and aarch64. Use list to print the list of libseccomp supported architectures 👑
• -e — query errno(3) numbers
• -i — query ioctl(2) requests
• -o — query open(2) flags
• -s — query signal(7) numbers
• -u — list UNIX domain socket inodes and names using netlink(7)
• -U — list UNIX domain socket inodes and names using proc_net(5)

🔥 SEE ALSO 🔥

syd(1), syd(2), syd(5), errno(3), ioctl(2), open(2), syscall(2), signal(7), netlink(7)

syd homepage: https://sydbox.exherbo.org/ 🌈

🧚 AUTHORS 🧚

Maintained by Ali Polatel. Up-to-date sources live at https://gitlab.exherbo.org/sydbox/sydbox.git and on Radicle at rad:z38HCnbmcDegA2BMxuPaPRPMdp6wF. Bugs and patches can be submitted to https://gitlab.exherbo.org/groups/sydbox/-/issues. Come discuss in #sydbox on Libera Chat or in #sydbox:mailstation.de on Matrix. 💜

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and that's the whole page, bestie — this one's dated 2026-09-01 and it's SYD-SYS(1) all the way down, mwah 💋