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+From: Mark Walters <markwalters1009@gmail.com>\r
+To: Ben Gamari <bgamari.foss@gmail.com>, notmuch@notmuchmail.org\r
+Subject: [PATCH] sprinters: bugfix when NULL passed for a string.\r
+In-Reply-To: <878vdrp4d9.fsf@qmul.ac.uk>\r
+References: <871ujjuu2z.fsf@gmail.com> <878vdrp4d9.fsf@qmul.ac.uk>\r
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+Date: Tue, 07 Aug 2012 20:48:52 +0100\r
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+\r
+\r
+The string function in a sprinter may be called with a NULL string\r
+pointer (eg if a header is absent). This causes a segfault. We fix\r
+this by checking for a null pointer in the string functions and update\r
+the sprinter documentation.\r
+\r
+At the moment some output when format=text is done directly rather than\r
+via an sprinter: in that case a null pointer is passed to printf or\r
+similar and a "(null)" appears in the output. That behaviour is not\r
+changed in this patch.\r
+---\r
+\r
+This could really do with some tests (it is the second time this type of\r
+bug has occurred). To be considered as a message by notmuch new a file\r
+needs at least one of a From: Subject: or To: header. Thus we should\r
+have three messages each of which just contains that single header (and\r
+nothing else) and check that search and show work as expected. \r
+\r
+\r
+\r
+ sprinter-json.c | 2 ++\r
+ sprinter-text.c | 2 ++\r
+ sprinter.h | 4 +++-\r
+ 3 files changed, 7 insertions(+), 1 deletions(-)\r
+\r
+diff --git a/sprinter-json.c b/sprinter-json.c\r
+index c9b6835..0a07790 100644\r
+--- a/sprinter-json.c\r
++++ b/sprinter-json.c\r
+@@ -118,6 +118,8 @@ json_string_len (struct sprinter *sp, const char *val, size_t len)\r
+ static void\r
+ json_string (struct sprinter *sp, const char *val)\r
+ {\r
++ if (val == NULL)\r
++ val = "";\r
+ json_string_len (sp, val, strlen (val));\r
+ }\r
+ \r
+diff --git a/sprinter-text.c b/sprinter-text.c\r
+index dfa54b5..10343be 100644\r
+--- a/sprinter-text.c\r
++++ b/sprinter-text.c\r
+@@ -38,6 +38,8 @@ text_string_len (struct sprinter *sp, const char *val, size_t len)\r
+ static void\r
+ text_string (struct sprinter *sp, const char *val)\r
+ {\r
++ if (val == NULL)\r
++ val = "";\r
+ text_string_len (sp, val, strlen (val));\r
+ }\r
+ \r
+diff --git a/sprinter.h b/sprinter.h\r
+index 5f43175..912a526 100644\r
+--- a/sprinter.h\r
++++ b/sprinter.h\r
+@@ -27,7 +27,9 @@ typedef struct sprinter {\r
+ * a list or map, followed or preceded by separators). For string\r
+ * and string_len, the char * must be UTF-8 encoded. string_len\r
+ * allows non-terminated strings and strings with embedded NULs\r
+- * (though the handling of the latter is format-dependent).\r
++ * (though the handling of the latter is format-dependent). For\r
++ * string (but not string_len) the string pointer passed may be\r
++ * NULL.\r
+ */\r
+ void (*string) (struct sprinter *, const char *);\r
+ void (*string_len) (struct sprinter *, const char *, size_t);\r
+-- \r
+1.7.9.1\r
+\r
+\r
+H\r
projects / notmuch-archives.git / commitdiff