SYD-SYS(1)                  General Commands Manual                 SYD-SYS(1)

NAME
       syd-sys - Lookup syscalls, errnos, ioctls, open flags, and signals by
       number or regular expression

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

       syd-sys -a list

       syd-sys [-uU]

DESCRIPTION
       Given a number, syd-sys prints the matching syscall name.

       Given a regex, syd-sys prints case-insensitively matching syscall
       names.

       Use -e to query errno(3) numbers.

       Use -i to query ioctl(2) requests.

       Use -o to query open(2) flags.

       Use -s to query signal(7) numbers.

       Use -u to list UNIX domain socket inodes and names using netlink(7).

       Use -U to list UNIX domain socket inodes and names using proc_net(5).

       For both -u and -U, each line is the inode and name separated by a tab.
       Abstract sockets are prefixed with @ and unnamed sockets are displayed
       as !unnamed.

OPTIONS

       -h   Display help.
       -a   Specify alternative architecture, such as 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 can be found at
       https://gitlab.exherbo.org/sydbox/sydbox.git and on Radicle at
       rad:z38HCnbmcDegA2BMxuPaPRPMdp6wF. Bugs/patches can be submitted to
       https://gitlab.exherbo.org/groups/sydbox/-/issues. Discuss in #sydbox
       on Libera Chat or in #sydbox:mailstation.de on Matrix.

                                  2026-09-01                        SYD-SYS(1)