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-rw-r--r--lib/libc/gen/errlst.c2
-rw-r--r--lib/libc/string/strerror.35
-rw-r--r--lib/libc/string/strerror.c2
3 files changed, 6 insertions, 3 deletions
diff --git a/lib/libc/gen/errlst.c b/lib/libc/gen/errlst.c
index b105cc8..d817823 100644
--- a/lib/libc/gen/errlst.c
+++ b/lib/libc/gen/errlst.c
@@ -36,7 +36,7 @@ __FBSDID("$FreeBSD$");
#include <stdio.h>
const char *const sys_errlist[] = {
- "Undefined error: 0", /* 0 - ENOERROR */
+ "No error: 0", /* 0 - ENOERROR */
"Operation not permitted", /* 1 - EPERM */
"No such file or directory", /* 2 - ENOENT */
"No such process", /* 3 - ESRCH */
diff --git a/lib/libc/string/strerror.3 b/lib/libc/string/strerror.3
index 2d6d206..0ec6cb0 100644
--- a/lib/libc/string/strerror.3
+++ b/lib/libc/string/strerror.3
@@ -32,7 +32,7 @@
.\" @(#)strerror.3 8.1 (Berkeley) 6/9/93
.\" $FreeBSD$
.\"
-.Dd October 12, 2004
+.Dd April 5, 2011
.Dt STRERROR 3
.Os
.Sh NAME
@@ -114,6 +114,9 @@ the range 0 <
.Fa errnum
<
.Fa sys_nerr .
+The number 0 is also recognized, although applications that take advantage of
+this are likely to use unspecified values of
+.Va errno .
.Pp
If insufficient storage is provided in
.Fa strerrbuf
diff --git a/lib/libc/string/strerror.c b/lib/libc/string/strerror.c
index 890ed21..57d253d 100644
--- a/lib/libc/string/strerror.c
+++ b/lib/libc/string/strerror.c
@@ -87,7 +87,7 @@ strerror_r(int errnum, char *strerrbuf, size_t buflen)
catd = catopen("libc", NL_CAT_LOCALE);
#endif
- if (errnum < 1 || errnum >= sys_nerr) {
+ if (errnum < 0 || errnum >= sys_nerr) {
errstr(errnum,
#if defined(NLS)
catgets(catd, 1, 0xffff, UPREFIX),
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