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atomic write for sideband remote messages

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It has been a few times that I ended up with such a confusing display:

|remote: Generating pack...
|remote: Done counting 17 objects.
|remote: Result has 9 objects.
|remote: Deltifying 9 objects.
|remote:  100% (9/9) done
|remote: Unpacking 9 objects
|Total 9, written 9 (delta 8), reused 0 (delta 0)
| 100% (9/9) done

The confusion can be avoided in most cases by writing the remote message
in one go to prevent interleacing with local messages.  The buffer
declaration has been moved inside recv_sideband() to avoid extra string
copies.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Nicolas Pitre
2006-10-11 11:49:15 -04:00
committed by Junio C Hamano
parent 0503f9c178
commit 9ac13ec941
4 changed files with 19 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
sideband.c
View File

@@ -11,10 +11,13 @@
* stream, aka "verbose"). A message over band #3 is a signal that
* the remote died unexpectedly. A flush() concludes the stream.
*/
int recv_sideband(const char *me, int in_stream, int out, int err, char *buf, int bufsz)
int recv_sideband(const char *me, int in_stream, int out, int err)
{
char buf[7 + LARGE_PACKET_MAX + 1];
strcpy(buf, "remote:");
while (1) {
int len = packet_read_line(in_stream, buf, bufsz);
int band, len;
len = packet_read_line(in_stream, buf+7, LARGE_PACKET_MAX);
if (len == 0)
break;
if (len < 1) {
@@ -22,25 +25,26 @@ int recv_sideband(const char *me, int in_stream, int out, int err, char *buf, in
safe_write(err, buf, len);
return SIDEBAND_PROTOCOL_ERROR;
}
band = buf[7] & 0xff;
len--;
switch (buf[0] & 0xFF) {
switch (band) {
case 3:
safe_write(err, "remote: ", 8);
safe_write(err, buf+1, len);
safe_write(err, "\n", 1);
buf[7] = ' ';
buf[8+len] = '\n';
safe_write(err, buf, 8+len+1);
return SIDEBAND_REMOTE_ERROR;
case 2:
safe_write(err, "remote: ", 8);
safe_write(err, buf+1, len);
buf[7] = ' ';
safe_write(err, buf, 8+len);
continue;
case 1:
safe_write(out, buf+1, len);
safe_write(out, buf+8, len);
continue;
default:
len = sprintf(buf + 1,
len = sprintf(buf,
"%s: protocol error: bad band #%d\n",
me, buf[0] & 0xFF);
safe_write(err, buf+1, len);
me, band);
safe_write(err, buf, len);
return SIDEBAND_PROTOCOL_ERROR;
}
}