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.TH "SYD\-SYS" "1" "2026\-09\-01"
.PP
.SH NAME
.PP
\fBsyd\-sys\fR \- Lookup syscalls, errnos, ioctls, open flags, and signals by number or regular expression
.PP
.SH SYNOPSIS
.PP
\fBsyd\-sys\fR \fI[\-heios]\fR \fI[\-a arch]\fR \fInumber|regex\fR
.PP
\fBsyd\-sys\fR \fI\-a list\fR
.PP
\fBsyd\-sys\fR \fI[\-uU]\fR
.PP
.SH DESCRIPTION
.PP
Given a number, \fBsyd\-sys\fR prints the matching syscall name.\&
.PP
Given a regex, \fBsyd\-sys\fR prints case\-insensitively matching syscall names.\&
.PP
Use \fB\-e\fR to query \fIerrno\fR(3) numbers.\&
.PP
Use \fB\-i\fR to query \fIioctl\fR(2) requests.\&
.PP
Use \fB\-o\fR to query \fIopen\fR(2) flags.\&
.PP
Use \fB\-s\fR to query \fIsignal\fR(7) numbers.\&
.PP
Use \fB\-u\fR to list UNIX domain socket inodes and names using \fInetlink\fR(7).\&
.PP
Use \fB\-U\fR to list UNIX domain socket inodes and names using \fIproc_net\fR(5).\&
.PP
For both \fB\-u\fR and \fB\-U\fR, each line is the inode and name separated by a
tab.\& Abstract sockets are prefixed with \fB@\fR and unnamed sockets are
displayed as \fB!\&unnamed\fR.\&
.PP
.SH OPTIONS
.PP
.TS
l lx
l lx
l lx
l lx
l lx
l lx
l lx
l lx
l lx.
T{
\fB\-h\fR
T}	T{
Display help.\&
T}
T{
\fB\-a\fR
T}	T{
Specify alternative architecture, such as \fBx86\fR, \fBx86_64\fR and \fBaarch64\fR.\&
T}
T{

T}	T{
Use \fBlist\fR to print the list of libseccomp supported architectures.\&
T}
T{
\fB\-e\fR
T}	T{
Query \fIerrno\fR(3) numbers.\&
T}
T{
\fB\-i\fR
T}	T{
Query \fIioctl\fR(2) requests.\&
T}
T{
\fB\-o\fR
T}	T{
Query \fIopen\fR(2) flags.\&
T}
T{
\fB\-s\fR
T}	T{
Query \fIsignal\fR(7) numbers.\&
T}
T{
\fB\-u\fR
T}	T{
List UNIX domain socket inodes and names using \fInetlink\fR(7).\&
T}
T{
\fB\-U\fR
T}	T{
List UNIX domain socket inodes and names using \fIproc_net\fR(5).\&
T}
.TE
.sp 1
.SH SEE ALSO
.PP
\fIsyd\fR(1), \fIsyd\fR(2), \fIsyd\fR(5), \fIerrno\fR(3), \fIioctl\fR(2), \fIopen\fR(2), \fIsyscall\fR(2), \fIsignal\fR(7), \fInetlink\fR(7)
.PP
\fBsyd\fR homepage: https://sydbox.\&exherbo.\&org/
.PP
.SH AUTHORS
.PP
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.\&