SYD-LS(1)

NAME

syd-ls - list unsafe directories, capabilities, system calls, environment variables, ioctl requests, 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 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) 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.

Given no set, syd-ls lists all files in the current working directory. In this mode, getdents64(2) 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) 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(2), syd(5), syd-hex(1), getdents(2)

syd homepage: https://sydbox.exherbolinux.org/

AUTHORS

Maintained by Ali Polatel. Up-to-date sources can be found at https://gitlab.exherbo.org/sydbox/sydbox.git and 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.