4 releases
new 0.0.4 | Nov 13, 2024 |
---|---|
0.0.3 | Feb 12, 2024 |
0.0.2 | Jan 25, 2024 |
0.0.1 | Jan 25, 2024 |
#542 in Unix APIs
13,145 downloads per month
5KB
libsydtime is a
LD_PRELOAD library
to replace vDSO time calls with system calls.
This library is meant as a complement to syd's
trace/deny_tsc
sandbox command.
To install from source, clone the repository at https://git.sr.ht/~alip/syd, change
into the directory time
and run make
, make test
and doas make install
. The
only prerequisite is Rust 1.56.1 or later.
Below is a simple example of how to use libsydtime with syd:
$ strace -qf -e%clock syd -ppaludis -mtrace/deny_tsc:1 -eLD_PRELOAD=/usr/local/lib/libsydtime.so date
[pid 27095] clock_gettime(CLOCK_REALTIME, {tv_sec=1706186439, tv_nsec=28829866}) = 0
Thu Jan 25 12:40:39 UTC 2024
[pid 27095] +++ exited with 0 +++
$ strace -qf -e%clock syd -ppaludis date # vDSO
Thu Jan 25 12:41:25 UTC 2024
[pid 27103] +++ exited with 0 +++
$ strace -qf -e%clock syd -ppaludis -mtrace/deny_tsc:1 date # vDSO not permitted
[pid 27113] --- SIGSEGV {si_signo=SIGSEGV, si_code=SI_KERNEL, si_addr=NULL} ---
[pid 27113] +++ killed by SIGSEGV +++
$
Maintained by Ali Polatel. Up-to-date sources can be found at https://git.sr.ht/~alip/syd and bugs/patches can be submitted by email to ~alip/sydbox-devel@lists.sr.ht.
Dependencies
~44KB