The delta introduced in the previous revision and attributed to the

OpenBSD project had grammar problems and made no attempt to motivate
the practice of saving errno.  Replace it with something better.

1 files changed, 4 insertions, 2 deletions

diff --git a/lib/libc/sys/sigaction.2 b/lib/libc/sys/sigaction.2
index 51bd2b9..1e508c8 100644
--- a/lib/libc/sys/sigaction.2
+++ b/lib/libc/sys/sigaction.2
@@ -437,10 +437,12 @@ functions when called from a signal handler is undefined.
 In general though, signal handlers should do little more than set a
 flag; most other actions are not safe.
 .Pp
-As well, inside the signal handler it is also considered more safe to
-make a copy the global variable
+Also, it is good practice to make a copy of the global variable
 .Va errno
 and restore it before returning from the signal handler.
+This protects against the side effect of
+.Va errno
+being set by functions called from inside the signal handler.
 .Sh RETURN VALUES
 A 0 value indicated that the call succeeded.  A \-1 return value
 indicates an error occurred and