From c9302c5f1b9a358db53ce79123bc62dff49c4205 Mon Sep 17 00:00:00 2001
From: Bryan Drewery <bdrewery@FreeBSD.org>
Date: Thu, 30 Apr 2015 18:07:48 +0000
Subject: [PATCH] MFC r281617:

  wc: Fix SIGINFO race causing final results to be lost to stderr.

Relnotes:	yes
---
 usr.bin/wc/wc.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/usr.bin/wc/wc.c b/usr.bin/wc/wc.c
index 08823a132b69..156a3270c018 100644
--- a/usr.bin/wc/wc.c
+++ b/usr.bin/wc/wc.c
@@ -74,6 +74,14 @@ siginfo_handler(int sig __unused)
 	siginfo = 1;
 }
 
+static void
+reset_siginfo(void)
+{
+
+	signal(SIGINFO, SIG_DFL);
+	siginfo = 0;
+}
+
 int
 main(int argc, char *argv[])
 {
@@ -207,6 +215,7 @@ cnt(const char *file)
 					} else
 						tmpll++;
 			}
+			reset_siginfo();
 			tlinect += linect;
 			if (dochar)
 				tcharct += charct;
@@ -229,6 +238,7 @@ cnt(const char *file)
 				return (1);
 			}
 			if (S_ISREG(sb.st_mode)) {
+				reset_siginfo();
 				charct = sb.st_size;
 				show_cnt(file, linect, wordct, charct, llct);
 				tcharct += charct;
@@ -289,6 +299,7 @@ word:	gotsp = 1;
 			}
 		}
 	}
+	reset_siginfo();
 	if (domulti && MB_CUR_MAX > 1)
 		if (mbrtowc(NULL, NULL, 0, &mbs) == (size_t)-1 && !warned)
 			warn("%s", file != NULL ? file : "stdin");