From: John Hughes <john@Calva.COM>
Date: Tue, 16 Oct 2001 10:20:22 +0000 (+0000)
Subject: Fix umovestr of unmapped page for UnixWare
X-Git-Tag: v4.5.18~1010
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=9cecf7f8d6115a247be7186013857270b2d588d5;p=strace

Fix umovestr of unmapped page for UnixWare
---

diff --git a/ChangeLog b/ChangeLog
index 7884935d..67f16ac3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2001-10-16  John Hughes  <john@Calva.COM>
+
+	* util.c (umovestr): UnixWare (svr4?) returns 0 when trying
+	to read unmapped page.  Make it possible to strace ksh.
+
 2001-10-03  David Mosberger  <davidm@hpl.hp.com>
 
 	* process.c (internal_clone): Avoid race condition by clearing
diff --git a/util.c b/util.c
index 595b847d..c59d25a7 100644
--- a/util.c
+++ b/util.c
@@ -711,7 +711,7 @@ char *laddr;
 
 	while (left) {
 		if (move > left) move = left;
-		if ((move = read(fd, laddr, move)) == -1)
+		if ((move = read(fd, laddr, move)) <= 0)
 			return left != len ? 0 : -1;
 		if (memchr (laddr, 0, move)) break;
 		left -= move;