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authorJeff Law <law@redhat.com>2012-08-13 13:12:18 -0600
committerJeff Law <law@redhat.com>2012-08-13 13:12:18 -0600
commit42443a47925ece8bb32b83c3edd58e404bd6b5cb (patch)
tree400fd3112d1f132d3a0d654fa8162228a717bbc6
parenta1079206686b5b0f50b7173689637064fd1c7f37 (diff)
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* manual/stdio.texi (snprintf): Clarify handling of the trailing
       null byte in the output string.
-rw-r--r--ChangeLog5
-rw-r--r--manual/stdio.texi2
2 files changed, 7 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index 386f8493c2..2b3d2e4550 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2012-08-13  Jeff Law <law@redhat.com>
+
+	* manual/stdio.texi (snprintf): Clarify handling of the trailing
+	null byte in the output string.
+
 2012-08-10  Joseph Myers  <joseph@codesourcery.com>
 
 	* sysdeps/unix/sysv/linux/kernel-features.h
diff --git a/manual/stdio.texi b/manual/stdio.texi
index c58ca22b2d..be769a538f 100644
--- a/manual/stdio.texi
+++ b/manual/stdio.texi
@@ -2341,6 +2341,8 @@ The @code{snprintf} function is similar to @code{sprintf}, except that
 the @var{size} argument specifies the maximum number of characters to
 produce.  The trailing null character is counted towards this limit, so
 you should allocate at least @var{size} characters for the string @var{s}.
+If @var{size} is zero, nothing, not even the null byte, shall be written and
+@var{s} may be a null pointer.
 
 The return value is the number of characters which would be generated
 for the given input, excluding the trailing null.  If this value is