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-rw-r--r--sideband.c51
1 files changed, 37 insertions, 14 deletions
diff --git a/sideband.c b/sideband.c
index ab8a1e9..58edea6 100644
--- a/sideband.c
+++ b/sideband.c
@@ -11,13 +11,19 @@
* stream, aka "verbose"). A message over band #3 is a signal that
* the remote died unexpectedly. A flush() concludes the stream.
*/
+
+#define PREFIX "remote:"
+#define SUFFIX "\e[K" /* change to " " if ANSI sequences don't work */
+
int recv_sideband(const char *me, int in_stream, int out, int err)
{
- char buf[7 + LARGE_PACKET_MAX + 1];
- strcpy(buf, "remote:");
+ unsigned pf = strlen(PREFIX);
+ unsigned sf = strlen(SUFFIX);
+ char buf[pf + LARGE_PACKET_MAX + sf + 1];
+ memcpy(buf, PREFIX, pf);
while (1) {
int band, len;
- len = packet_read_line(in_stream, buf+7, LARGE_PACKET_MAX);
+ len = packet_read_line(in_stream, buf + pf, LARGE_PACKET_MAX);
if (len == 0)
break;
if (len < 1) {
@@ -25,35 +31,52 @@ int recv_sideband(const char *me, int in_stream, int out, int err)
safe_write(err, buf, len);
return SIDEBAND_PROTOCOL_ERROR;
}
- band = buf[7] & 0xff;
+ band = buf[pf] & 0xff;
len--;
switch (band) {
case 3:
- buf[7] = ' ';
- buf[8+len] = '\n';
- safe_write(err, buf, 8+len+1);
+ buf[pf] = ' ';
+ buf[pf+1+len] = '\n';
+ safe_write(err, buf, pf+1+len+1);
return SIDEBAND_REMOTE_ERROR;
case 2:
- buf[7] = ' ';
- len += 8;
+ buf[pf] = ' ';
+ len += pf+1;
while (1) {
- int brk = 8;
+ int brk = pf+1;
+
+ /* Break the buffer into separate lines. */
while (brk < len) {
brk++;
if (buf[brk-1] == '\n' ||
buf[brk-1] == '\r')
break;
}
- safe_write(err, buf, brk);
+
+ /*
+ * Let's insert a suffix to clear the end
+ * of the screen line, but only if current
+ * line data actually contains something.
+ */
+ if (brk > pf+1 + 1) {
+ char save[sf];
+ memcpy(save, buf + brk, sf);
+ buf[brk + sf - 1] = buf[brk - 1];
+ memcpy(buf + brk - 1, SUFFIX, sf);
+ safe_write(err, buf, brk + sf);
+ memcpy(buf + brk, save, sf);
+ } else
+ safe_write(err, buf, brk);
+
if (brk < len) {
- memmove(buf + 8, buf + brk, len - brk);
- len = len - brk + 8;
+ memmove(buf + pf+1, buf + brk, len - brk);
+ len = len - brk + pf+1;
} else
break;
}
continue;
case 1:
- safe_write(out, buf+8, len);
+ safe_write(out, buf + pf+1, len);
continue;
default:
len = sprintf(buf,