Support the '=' command

diff --git a/editors/sed.c b/editors/sed.c
index df62346..4ab7219 100644 (file)
--- a/editors/sed.c
+++ b/editors/sed.c
@@ -431,7 +431,7 @@ static char *parse_cmd_str(struct sed_cmd * const sed_cmd, const char *const cmd
 
        /* if it was a single-letter command that takes no arguments (such as 'p'
         * or 'd') all we need to do is increment the index past that command */
-       if (strchr("pd", sed_cmd->cmd)) {
+       if (strchr("pd=", sed_cmd->cmd)) {
                idx++;
        }
        /* handle (s)ubstitution command */
@@ -451,7 +451,7 @@ static char *parse_cmd_str(struct sed_cmd * const sed_cmd, const char *const cmd
                idx += parse_file_cmd(sed_cmd, &cmdstr[idx]);
        }
        else {
-               error_msg_and_die("invalid command");
+               error_msg_and_die("Unsupported command %c", sed_cmd->cmd);
        }
 
        /* give back whatever's left over */
@@ -685,7 +685,9 @@ static void process_file(FILE *file)
                                 * actual sedding
                                 */
                                switch (sed_cmd->cmd) {
-
+                                       case '=':
+                                               printf("%d\n", linenum);
+                                               break;
                                        case 'p':
                                                puts(line);
                                                break;