From: Darik Horn <dajhorn@vanadac.com>
Date: Tue, 15 Jan 2013 01:27:39 +0000 (-0600)
Subject: Ensure that zfs diff prints unicode safely.
X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=commitdiff_plain;h=38145d612963d0a5b80017d5d1d49c1d4f9637c2;p=zfs.git

Ensure that zfs diff prints unicode safely.

In the stream_bytes() library function used by `zfs diff`, explicitly
cast each byte in the input string to an unsigned character so that the
Linux fprintf() correctly escapes to octal and does not mangle the output.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #1172
---

diff --git a/lib/libzfs/libzfs_diff.c b/lib/libzfs/libzfs_diff.c
index 8140a70..eb05f4d 100644
--- a/lib/libzfs/libzfs_diff.c
+++ b/lib/libzfs/libzfs_diff.c
@@ -141,7 +141,7 @@ stream_bytes(FILE *fp, const char *string)
 		if (*string > ' ' && *string != '\\' && *string < '\177')
 			(void) fprintf(fp, "%c", *string++);
 		else
-			(void) fprintf(fp, "\\%03o", *string++);
+			(void) fprintf(fp, "\\%03o", (unsigned char)*string++);
 	}
 }