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Tip revision: 49ed2bc4660c7cd0592cf21cc514080574d06320 authored by Junio C Hamano on 05 December 2006, 03:44:40 UTC
git-reset to remove "$GIT_DIR/MERGE_MSG"
git-reset to remove "$GIT_DIR/MERGE_MSG"
Tip revision: 49ed2bc
sideband.c
#include "pkt-line.h"
#include "sideband.h"
/*
* Receive multiplexed output stream over git native protocol.
* in_stream is the input stream from the remote, which carries data
* in pkt_line format with band designator. Demultiplex it into out
* and err and return error appropriately. Band #1 carries the
* primary payload. Things coming over band #2 is not necessarily
* error; they are usually informative message on the standard error
* 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[7 + LARGE_PACKET_MAX + 1];
strcpy(buf, "remote:");
while (1) {
int band, len;
len = packet_read_line(in_stream, buf+7, LARGE_PACKET_MAX);
if (len == 0)
break;
if (len < 1) {
len = sprintf(buf, "%s: protocol error: no band designator\n", me);
safe_write(err, buf, len);
return SIDEBAND_PROTOCOL_ERROR;
}
band = buf[7] & 0xff;
len--;
switch (band) {
case 3:
buf[7] = ' ';
buf[8+len] = '\n';
safe_write(err, buf, 8+len+1);
return SIDEBAND_REMOTE_ERROR;
case 2:
buf[7] = ' ';
safe_write(err, buf, 8+len);
continue;
case 1:
safe_write(out, buf+8, len);
continue;
default:
len = sprintf(buf,
"%s: protocol error: bad band #%d\n",
me, band);
safe_write(err, buf, len);
return SIDEBAND_PROTOCOL_ERROR;
}
}
return 0;
}
/*
* fd is connected to the remote side; send the sideband data
* over multiplexed packet stream.
*/
ssize_t send_sideband(int fd, int band, const char *data, ssize_t sz, int packet_max)
{
ssize_t ssz = sz;
const char *p = data;
while (sz) {
unsigned n;
char hdr[5];
n = sz;
if (packet_max - 5 < n)
n = packet_max - 5;
sprintf(hdr, "%04x", n + 5);
hdr[4] = band;
safe_write(fd, hdr, 5);
safe_write(fd, p, n);
p += n;
sz -= n;
}
return ssz;
}