From: Ricardo Branco <rbranco@suse.de>
Subject: [PATCH]: Add missing POSIX psiginfo(3) call
To: tech@openbsd.org
Date: Mon, 4 Aug 2025 19:32:13 +0200

Attached patch.

Best,
From d4e06d510810d09ed261b0bbcae6dbe1ca1810f2 Mon Sep 17 00:00:00 2001
From: Ricardo Branco <rbranco@suse.de>
Date: Wed, 16 Apr 2025 10:16:13 +0200
Subject: [PATCH] Add POSIX psiginfo(3) call

---
 include/signal.h         |  1 +
 lib/libc/Symbols.list    |  1 +
 lib/libc/gen/psignal.3   | 21 ++++++++++++++++++++-
 lib/libc/gen/psignal.c   |  6 ++++++
 lib/libc/hidden/signal.h |  1 +
 5 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/include/signal.h b/include/signal.h
index 07982bd75a1..7506ef0fbe7 100644
--- a/include/signal.h
+++ b/include/signal.h
@@ -132,6 +132,7 @@ int	thrkill(pid_t _tid, int _signum, void *_tcb);
 int	sigwait(const sigset_t *__restrict, int *__restrict);
 #endif
 #if __BSD_VISIBLE ||  __POSIX_VISIBLE >= 200809
+void	psiginfo(const siginfo_t *, const char *);
 void	psignal(unsigned int, const char *);
 #endif
 #endif /* __BSD_VISIBLE || __POSIX_VISIBLE || __XPG_VISIBLE */
diff --git a/lib/libc/Symbols.list b/lib/libc/Symbols.list
index 7b1dbdeca69..12e04f89fb4 100644
--- a/lib/libc/Symbols.list
+++ b/lib/libc/Symbols.list
@@ -745,6 +745,7 @@ posix_spawnattr_setschedpolicy
 posix_spawnattr_setsigdefault
 posix_spawnattr_setsigmask
 posix_spawnp
+psiginfo
 psignal
 pw_dup
 raise
diff --git a/lib/libc/gen/psignal.3 b/lib/libc/gen/psignal.3
index 3fd2ebbf7bf..015e968a107 100644
--- a/lib/libc/gen/psignal.3
+++ b/lib/libc/gen/psignal.3
@@ -27,11 +27,12 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: May 16 2019 $
+.Dd $Mdocdate: Apr 16 2025 $
 .Dt PSIGNAL 3
 .Os
 .Sh NAME
 .Nm psignal ,
+.Nm psiginfo ,
 .Nm sys_siglist ,
 .Nm sys_signame
 .Nd system signal messages
@@ -39,6 +40,7 @@
 .In signal.h
 .Ft void
 .Fn psignal "unsigned int sig" "const char *s"
+.Fn psiginfo "const siginfo_t *si" "const char *s"
 .Vt extern char *sys_siglist[];
 .Vt extern char *sys_signame[];
 .Sh DESCRIPTION
@@ -64,6 +66,16 @@ the string
 .Dq Unknown signal
 is produced.
 .Pp
+The
+.Fn psiginfo
+function is similar to
+.Fn psignal ,
+except that the signal number information is taken from the
+.Fa si
+argument which is a
+.Vt siginfo_t
+structure.
+.Pp
 The message strings can be accessed directly using the external array
 .Va sys_siglist ,
 indexed by recognized signal numbers.
@@ -87,6 +99,13 @@ The
 .Fn psignal
 function appeared in
 .Bx 4.2 .
+The
+.Fn psiginfo
+function appeared in
+.Fx 15.0 ,
+.Nx 6.0 ,
+and
+.Dx 4.1 .
 .Sh CAVEATS
 On systems other than
 .Ox ,
diff --git a/lib/libc/gen/psignal.c b/lib/libc/gen/psignal.c
index dca921d5a5a..ee70d8c95cc 100644
--- a/lib/libc/gen/psignal.c
+++ b/lib/libc/gen/psignal.c
@@ -61,3 +61,9 @@ psignal(unsigned int sig, const char *s)
 	iov[niov+1].iov_len = 1;
 	(void)writev(STDERR_FILENO, iov, niov+2);
 }
+
+void
+psiginfo(const siginfo_t *si, const char *s)
+{
+	psignal(si->si_signo, s);
+}
diff --git a/lib/libc/hidden/signal.h b/lib/libc/hidden/signal.h
index 7fdfcef7532..5011701517d 100644
--- a/lib/libc/hidden/signal.h
+++ b/lib/libc/hidden/signal.h
@@ -52,6 +52,7 @@ PROTO_NORMAL(__errno);
 PROTO_DEPRECATED(bsd_signal);
 PROTO_NORMAL(kill);             /* wrap to ban SIGTHR? */
 PROTO_DEPRECATED(killpg);
+PROTO_DEPRECATED(psiginfo);
 PROTO_DEPRECATED(psignal);
 PROTO_DEPRECATED(pthread_sigmask);
 PROTO_NORMAL(raise);
-- 
2.50.1