Merge pull request #31648 from neighbourhoodie/review-content

[thirdparty/systemd.git] / docs / PORTABILITY_AND_STABILITY.md

diff --git a/docs/PORTABILITY_AND_STABILITY.md b/docs/PORTABILITY_AND_STABILITY.md
index 890d376ce372c2fbc8570fbcb457b0ba70d8e87b..441c77ccfb15247b9ac80ee146509d160b633462 100644 (file)
--- a/docs/PORTABILITY_AND_STABILITY.md
+++ b/docs/PORTABILITY_AND_STABILITY.md
@@ -20,7 +20,11 @@ The stable interfaces are:
   Note however that the output generated by these commands is generally not included in the promise, unless it is documented in the man page.
   Example: the output of `systemctl status` is not stable, but that of `systemctl show` is, because the former is intended to be human readable and the latter computer readable, and this is documented in the man page.
 
-* **The protocol spoken on the socket referred to by `$NOTIFY_SOCKET`**, as documented in [sd_notify(3)](https://www.freedesktop.org/software/systemd/man/sd_notify.html).
+* **The protocol spoken on the socket referred to by `$NOTIFY_SOCKET`**, as documented in
+  [sd_notify(3)](https://www.freedesktop.org/software/systemd/man/sd_notify.html). Note that, although using
+  libsystemd is a good choice, this protocol can also be reimplemented without external dependencies, as
+  demonstrated in the example listed in
+  [sd_notify(3)](https://www.freedesktop.org/software/systemd/man/devel/sd_notify.html#Notes)
 
 * Some of the **"special" unit names** and their semantics.
   To be precise the ones that are necessary for normal services, and not those required only for early boot and late shutdown, with very few exceptions.