---
name: "syd-ls"
section: "1"
platform: "linux"
package: "syd"
version: "3.59.0-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/syd-ls"
---

# syd-ls(1)

List unsafe directories, capabilities, system calls, environment variables, ioctl requests, personalities, and prctl options

## NAME

**syd-ls** - List unsafe directories, capabilities, system calls, environment variables, ioctl requests, personalities, and prctl options

## SYNOPSIS

**syd-ls** *\[set\]*

## DESCRIPTION

The **syd-ls** utility prints the names of the system calls which belong to the given set. Available sets are **aio**, **cpu**, **dead**, **deny**, **ebpf**, **futex**, **hook**, **nice**, **noop**, **pkey**, **ptrace**, **safe**, **setid**, **time**, and **uring**.

If set is **drop**, **syd-ls** prints the list of Linux [*capabilities*(7)](/capabilities/7.md) that are dropped at startup.

If set is **env**, **syd-ls** prints the list of unsafe environment variables.

If set is **ioctl**, **syd-ls** prints the list of allowed ioctl requests.

If set is **prctl**, **syd-ls** prints the list of allowed prctl options.

If set is **personality**, **syd-ls** prints the list of allowed personalities.

Given no set, **syd-ls** lists all files in the current working directory. In this mode, [getdents64(2)](/getdents64/2.md) is used directly. Use to list files in untrusted directories with huge number of files. File names are printed hex-encoded, delimited by newline, use [*syd-hex*(1)](/syd-hex/1.md) to decode. See EXAMPLES section for more information.

## EXAMPLES

```
[alip@caissa tmp]$ mkdir test; cd test
[alip@caissa test]$ for i in {1..10000000}; do :>$i; done
[alip@caissa test]$ df -i .
Filesystem       Inodes    IUsed IFree IUse% Mounted on
tmpfs          10048576 10000228 48348  100% /tmp
[alip@caissa test]$ syd-ls | head -n5 | syd-hex -dfs
.
..
10000000
9999999
9999998
[alip@caissa test]$ for ls in syd-ls gls 9ls 'busybox ls'; do
> sync
> sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches'
> echo "[*] $ls"
> time $ls >/dev/null
> done
[*] syd-ls
syd-ls: Listed 10000002 files in 2.882764582 seconds.
real    0m2.889s
user    0m0.883s
sys     0m1.995s
[*] gls
real    0m7.548s
user    0m5.724s
sys     0m1.803s
[*] 9ls
real    0m15.306s
user    0m2.523s
sys     0m12.743s
[*] busybox ls
real    0m18.011s
user    0m11.178s
sys     0m6.786s
[alip@caissa test]$ gls --version | head -n1
ls (GNU coreutils) 9.6
[alip@caissa test]$ pacman -Ss 9base | head -n1
extra/9base 6-9 [installed]
[alip@caissa test]$ busybox | head -n1
BusyBox v1.36.1 () multi-call binary.
```

## SEE ALSO

[*syd*(1)](/syd/1.md), [*syd*(2)](/syd/2.md), [*syd*(5)](/syd/5.md), [*syd-hex*(1)](/syd-hex/1.md), [*getdents*(2)](/getdents/2.md)

**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.