extension for spawn_parse_args - parse \b \f \n \r \t

src/spawn.c

@@ -377,7 +377,22 @@ spawn_parse_args(char ***argv, int argc, const char *cmd, const char **replace)
       while (*s && *s != ' ' && *s != '\\')
         s++;
       if (*s == '\\') {
-        memmove(s, s + 1, strlen(s));
+        l = *(s + 1);
+        if (l == 'b')
+          l = '\b';
+        else if (l == 'f')
+          l = '\f';
+        else if (l == 'n')
+          l = '\n';
+        else if (l == 'r')
+          l = '\r';
+        else if (l == 't')
+          l = '\t';
+        else
+          l = 0;
+        if (l)
+          *s++ = l;
+        memmove(s, s + 1, strlen(s) - 1);
         if (*s)
           s++;
       }