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authorTodd C. Miller <millert@cvs.openbsd.org>2005-03-24 15:15:32 +0000
committerTodd C. Miller <millert@cvs.openbsd.org>2005-03-24 15:15:32 +0000
commitab1be173858b3f7b0d5b25c737a45ba26ef51ed4 (patch)
treee541d6f7265e9a862aa536e7c9c92e91f2653510 /lib/libc
parent1dcff930e9ec8fe859be1f11d640df73ad9b8d5f (diff)
Document that perror() treats an empty string like NULL.
Diffstat (limited to 'lib/libc')
-rw-r--r--lib/libc/stdio/perror.314
1 files changed, 6 insertions, 8 deletions
diff --git a/lib/libc/stdio/perror.3 b/lib/libc/stdio/perror.3
index b7f0ff4af3d..becb2e4a57d 100644
--- a/lib/libc/stdio/perror.3
+++ b/lib/libc/stdio/perror.3
@@ -1,4 +1,4 @@
-.\" $OpenBSD: perror.3,v 1.6 2003/06/02 20:18:37 millert Exp $
+.\" $OpenBSD: perror.3,v 1.7 2005/03/24 15:15:31 millert Exp $
.\"
.\" Copyright (c) 1980, 1991 Regents of the University of California.
.\" All rights reserved.
@@ -50,14 +50,12 @@ standard error stream.
.Pp
If the argument
.Fa string
-is non-null it is prepended to the message string and separated from it by
-a colon and a space
-.Pq Ql \&:\ \& .
-If
-.Fa string
-is
+is not the
.Dv NULL
-only the error message string is printed.
+pointer and is not zero length, it is prepended to the message string and
+separated from it by a colon and a space
+.Pq Ql \&:\ \& .
+Otherwise, only the error message string is printed.
.Pp
The contents of the error message string are the same as those returned by
.Fn strerror