commit bash-20090910 snapshot

command.h

@@ -35,11 +35,15 @@ enum r_instruction {
   r_append_err_and_out
 };
 
+/* Redirection flags; values for rflags */
+#define REDIR_VARASSIGN		0x01
+
 /* Redirection errors. */
 #define AMBIGUOUS_REDIRECT  -1
 #define NOCLOBBER_REDIRECT  -2
 #define RESTRICTED_REDIRECT -3	/* can only happen in restricted shells. */
 #define HEREDOC_REDIRECT    -4  /* here-doc temp file can't be created */
+#define BADVAR_REDIRECT	    -5  /* something wrong with {varname}redir */
 
 #define CLOBBERING_REDIRECT(ri) \
   (ri == r_output_direction || ri == r_err_and_out)
@@ -135,7 +139,8 @@ typedef union {
    (or translator in redir.c) encountered an out-of-range file descriptor. */
 typedef struct redirect {
   struct redirect *next;	/* Next element, or NULL. */
-  int redirector;		/* Descriptor to be redirected. */
+  REDIRECTEE redirector;	/* Descriptor or varname to be redirected. */
+  int rflags;			/* Private flags for this redirection */
   int flags;			/* Flag value for `open'. */
   enum r_instruction  instruction; /* What to do with the information. */
   REDIRECTEE redirectee;	/* File descriptor or filename */