Merge branch 'eb/mailinfo' into next

diff --git a/mailinfo.c b/mailinfo.c
index 78d2a15dd0ea79b5950772c3f35837f7b99a9ac8..5b6c2157ede415e019099098f2d0dc522b1e7a27 100644 (file)
--- a/mailinfo.c
+++ b/mailinfo.c
@@ -389,19 +389,40 @@ static void check_header_line(char *line)
        check_header(line, header);
 }
 
+static int is_rfc2822_header(char *line)
+{
+       /*
+        * The section that defines the loosest possible
+        * field name is "3.6.8 Optional fields".
+        *
+        * optional-field = field-name ":" unstructured CRLF
+        * field-name = 1*ftext
+        * ftext = %d33-57 / %59-126
+        */
+       int ch;
+       char *cp = line;
+       while ((ch = *cp++)) {
+               if (ch == ':')
+                       return cp != line;
+               if ((33 <= ch && ch <= 57) ||
+                   (59 <= ch && ch <= 126))
+                       continue;
+               break;
+       }
+       return 0;
+}
+
 static int read_one_header_line(char *line, int sz, FILE *in)
 {
        int ofs = 0;
        while (ofs < sz) {
-               const char *colon;
                int peek, len;
                if (fgets(line + ofs, sz - ofs, in) == NULL)
                        break;
                len = eatspace(line + ofs);
                if (len == 0)
                        break;
-               colon = strchr(line, ':');
-               if (!colon || !isspace(colon[1])) {
+               if (!is_rfc2822_header(line)) {
                        /* Re-add the newline */
                        line[ofs + len] = '\n';
                        line[ofs + len + 1] = '\0';