hush: document better where bad redirect syntax is detected
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/shell/hush.c b/shell/hush.c
index a8ec54e..e2b0a15 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -3054,6 +3054,14 @@
struct pipe *pi = ctx->pipe;
struct command *command = ctx->command;
+#if 0 /* Instead we emit error message at run time */
+ if (ctx->pending_redirect) {
+ /* For example, "cmd >" (no filename to redirect to) */
+ die_if_script("syntax error: %s", "invalid redirect");
+ ctx->pending_redirect = NULL;
+ }
+#endif
+
if (command) {
if (IS_NULL_CMD(command)) {
debug_printf_parse("done_command: skipping null cmd, num_cmds=%d\n", pi->num_cmds);
@@ -3576,6 +3584,12 @@
debug_printf_parse("duplicating redirect '%d>&%d'\n",
redir->rd_fd, redir->rd_dup);
} else {
+#if 0 /* Instead we emit error message at run time */
+ if (ctx->pending_redirect) {
+ /* For example, "cmd > <file" */
+ die_if_script("syntax error: %s", "invalid redirect");
+ }
+#endif
/* Set ctx->pending_redirect, so we know what to do at the
* end of the next parsed word. */
ctx->pending_redirect = redir;
@@ -6276,9 +6290,12 @@
/* "rd_fd<*>file" case (<*> is <,>,>>,<>) */
char *p;
if (redir->rd_filename == NULL) {
- /* Something went wrong in the parse.
- * Pretend it didn't happen */
- bb_error_msg("bug in redirect parse");
+ /*
+ * Examples:
+ * "cmd >" (no filename)
+ * "cmd > <file" (2nd redirect starts too early)
+ */
+ die_if_script("syntax error: %s", "invalid redirect");
continue;
}
mode = redir_table[redir->rd_type].mode;