5 * Receive multiplexed output stream over git native protocol.
6 * in_stream is the input stream from the remote, which carries data
7 * in pkt_line format with band designator. Demultiplex it into out
8 * and err and return error appropriately. Band #1 carries the
9 * primary payload. Things coming over band #2 is not necessarily
10 * error; they are usually informative message on the standard error
11 * stream, aka "verbose"). A message over band #3 is a signal that
12 * the remote died unexpectedly. A flush() concludes the stream.
14 int recv_sideband(const char *me, int in_stream, int out, int err)
16 char buf[7 + LARGE_PACKET_MAX + 1];
17 strcpy(buf, "remote:");
20 len = packet_read_line(in_stream, buf+7, LARGE_PACKET_MAX);
24 len = sprintf(buf, "%s: protocol error: no band designator\n", me);
25 safe_write(err, buf, len);
26 return SIDEBAND_PROTOCOL_ERROR;
34 safe_write(err, buf, 8+len+1);
35 return SIDEBAND_REMOTE_ERROR;
43 if (buf[brk-1] == '\n' ||
47 safe_write(err, buf, brk);
49 memmove(buf + 8, buf + brk, len - brk);
56 safe_write(out, buf+8, len);
60 "%s: protocol error: bad band #%d\n",
62 safe_write(err, buf, len);
63 return SIDEBAND_PROTOCOL_ERROR;
70 * fd is connected to the remote side; send the sideband data
71 * over multiplexed packet stream.
73 ssize_t send_sideband(int fd, int band, const char *data, ssize_t sz, int packet_max)
83 if (packet_max - 5 < n)
85 sprintf(hdr, "%04x", n + 5);
87 safe_write(fd, hdr, 5);