i9e: Fix compilation on Ubuntu-12.04.

Commit c0162946 (i9e: Avoid key binding macros) from half a year
ago broke compilation for readline-6.2, which ships at least with
Ubuntu-12.04. The problem is that c0162946 changed dispatch_key()
to use rl_executing_keyseq, a readline variable that was introduced
in readline-6.3. Compilation fails on systems with readline-6.2 or
older because the variable does not exist.

This patch modifies interactive.c to provide an equivalent of
rl_executing_keyseq and changes dispatch_key() to use this version
instead.

diff --git a/interactive.c b/interactive.c
index 9f8a5013b44e3bc3cb1119483b30c0687bb08010..a568d3c5c82fb065eaaff9c86aeed02ff5310094 100644 (file)
--- a/interactive.c
+++ b/interactive.c
@@ -28,6 +28,8 @@ struct i9e_private {
        int num_columns;
        int num_key_bindings;
        char empty_line[1000];
+       char key_sequence[32];
+       unsigned key_sequence_length;
        struct task *task;
        struct btr_node *stdout_btrn;
        bool last_write_was_status;
@@ -328,8 +330,26 @@ static int i9e_post_select(__a_unused struct sched *s, __a_unused void *context)
        ret = 0;
        if (i9ep->caught_sigint)
                goto rm_btrn;
-       while (input_available())
+       while (input_available()) {
+               if (i9ep->stdout_btrn) {
+                       unsigned len = i9ep->key_sequence_length;
+                       assert(len < sizeof(i9ep->key_sequence) - 1);
+                       buf = i9ep->key_sequence + len;
+                       ret = read(i9ep->ici->fds[0], buf, 1);
+                       if (ret < 0) {
+                               ret = -ERRNO_TO_PARA_ERROR(errno);
+                               goto rm_btrn;
+                       }
+                       ret = -E_I9E_EOF;
+                       if (ret == 0)
+                               goto rm_btrn;
+                       buf[1] = '\0';
+                       i9ep->key_sequence_length++;
+                       rl_stuff_char((int)(unsigned char)*buf);
+               }
                rl_callback_read_char();
+               ret = 0;
+       }
        if (!i9ep->stdout_btrn)
                goto out;
        ret = btr_node_status(i9ep->stdout_btrn, 0, BTR_NT_LEAF);
@@ -418,8 +438,10 @@ static int dispatch_key(__a_unused int count, __a_unused int key)
        int i, ret;
 
        for (i = i9ep->num_key_bindings - 1; i >= 0; i--) {
-               if (strcmp(rl_executing_keyseq, i9ep->ici->bound_keyseqs[i]))
+               if (strcmp(i9ep->key_sequence, i9ep->ici->bound_keyseqs[i]))
                        continue;
+               i9ep->key_sequence[0] = '\0';
+               i9ep->key_sequence_length = 0;
                ret = i9ep->ici->key_handler(i);
                return ret < 0? ret : 0;
        }
@@ -470,6 +492,11 @@ int i9e_open(struct i9e_client_info *ici, struct sched *s)
                int i;
                /* bind each key sequence to our dispatcher */
                for (i = 0; (seq = ici->bound_keyseqs[i]); i++) {
+                       if (strlen(seq) >= sizeof(i9ep->key_sequence) - 1) {
+                               PARA_WARNING_LOG("ignoring overlong key %s\n",
+                                       seq);
+                               continue;
+                       }
                        if (rl_bind_keyseq_in_map(seq,
                                        dispatch_key, i9ep->bare_km) != 0)
                                PARA_WARNING_LOG("could not bind #%d: %s\n", i, seq);