From 5b4c61cd0b7d35f5a905c83a0ee111a1876a7873 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Thu, 9 Aug 2012 16:49:28 +0200
Subject: journald: properly unescape messages from /dev/kmsg

---
 src/shared/util.c | 20 ++++++++++++++++----
 src/shared/util.h |  1 +
 2 files changed, 17 insertions(+), 4 deletions(-)

(limited to 'src/shared')

diff --git a/src/shared/util.c b/src/shared/util.c
index af975956db..946b7d53f9 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -1562,19 +1562,25 @@ char *cescape(const char *s) {
         return r;
 }
 
-char *cunescape_length(const char *s, size_t length) {
+char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix) {
         char *r, *t;
         const char *f;
+        size_t pl;
 
         assert(s);
 
-        /* Undoes C style string escaping */
+        /* Undoes C style string escaping, and optionally prefixes it. */
+
+        pl = prefix ? strlen(prefix) : 0;
 
-        r = new(char, length+1);
+        r = new(char, pl+length+1);
         if (!r)
                 return r;
 
-        for (f = s, t = r; f < s + length; f++) {
+        if (prefix)
+                memcpy(r, prefix, pl);
+
+        for (f = s, t = r + pl; f < s + length; f++) {
 
                 if (*f != '\\') {
                         *(t++) = *f;
@@ -1685,7 +1691,13 @@ finish:
         return r;
 }
 
+char *cunescape_length(const char *s, size_t length) {
+        return cunescape_length_with_prefix(s, length, NULL);
+}
+
 char *cunescape(const char *s) {
+        assert(s);
+
         return cunescape_length(s, strlen(s));
 }
 
diff --git a/src/shared/util.h b/src/shared/util.h
index b315593bba..d5a48eb00f 100644
--- a/src/shared/util.h
+++ b/src/shared/util.h
@@ -256,6 +256,7 @@ int undecchar(char c);
 char *cescape(const char *s);
 char *cunescape(const char *s);
 char *cunescape_length(const char *s, size_t length);
+char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix);
 
 char *xescape(const char *s, const char *bad);
 
-- 
cgit v1.2.3-54-g00ecf