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Diffstat (limited to 'pkt-line.c')
-rw-r--r--pkt-line.c55
1 files changed, 54 insertions, 1 deletions
diff --git a/pkt-line.c b/pkt-line.c
index 295ba2b..cd1bd26 100644
--- a/pkt-line.c
+++ b/pkt-line.c
@@ -1,6 +1,51 @@
#include "cache.h"
#include "pkt-line.h"
+const char *packet_trace_prefix = "git";
+static const char trace_key[] = "GIT_TRACE_PACKET";
+
+void packet_trace_identity(const char *prog)
+{
+ packet_trace_prefix = xstrdup(prog);
+}
+
+static void packet_trace(const char *buf, unsigned int len, int write)
+{
+ int i;
+ struct strbuf out;
+
+ if (!trace_want(trace_key))
+ return;
+
+ /* +32 is just a guess for header + quoting */
+ strbuf_init(&out, len+32);
+
+ strbuf_addf(&out, "packet: %12s%c ",
+ packet_trace_prefix, write ? '>' : '<');
+
+ if ((len >= 4 && !prefixcmp(buf, "PACK")) ||
+ (len >= 5 && !prefixcmp(buf+1, "PACK"))) {
+ strbuf_addstr(&out, "PACK ...");
+ unsetenv(trace_key);
+ }
+ else {
+ /* XXX we should really handle printable utf8 */
+ for (i = 0; i < len; i++) {
+ /* suppress newlines */
+ if (buf[i] == '\n')
+ continue;
+ if (buf[i] >= 0x20 && buf[i] <= 0x7e)
+ strbuf_addch(&out, buf[i]);
+ else
+ strbuf_addf(&out, "\\%o", buf[i]);
+ }
+ }
+
+ strbuf_addch(&out, '\n');
+ trace_strbuf(trace_key, &out);
+ strbuf_release(&out);
+}
+
/*
* Write a packetized stream, where each line is preceded by
* its length (including the header) as a 4-byte hex number.
@@ -39,11 +84,13 @@ ssize_t safe_write(int fd, const void *buf, ssize_t n)
*/
void packet_flush(int fd)
{
+ packet_trace("0000", 4, 1);
safe_write(fd, "0000", 4);
}
void packet_buf_flush(struct strbuf *buf)
{
+ packet_trace("0000", 4, 1);
strbuf_add(buf, "0000", 4);
}
@@ -62,6 +109,7 @@ static unsigned format_packet(const char *fmt, va_list args)
buffer[1] = hex(n >> 8);
buffer[2] = hex(n >> 4);
buffer[3] = hex(n);
+ packet_trace(buffer+4, n-4, 1);
return n;
}
@@ -130,13 +178,16 @@ int packet_read_line(int fd, char *buffer, unsigned size)
len = packet_length(linelen);
if (len < 0)
die("protocol error: bad line length character: %.4s", linelen);
- if (!len)
+ if (!len) {
+ packet_trace("0000", 4, 0);
return 0;
+ }
len -= 4;
if (len >= size)
die("protocol error: bad line length %d", len);
safe_read(fd, buffer, len);
buffer[len] = 0;
+ packet_trace(buffer, len, 0);
return len;
}
@@ -153,6 +204,7 @@ int packet_get_line(struct strbuf *out,
if (!len) {
*src_buf += 4;
*src_len -= 4;
+ packet_trace("0000", 4, 0);
return 0;
}
if (*src_len < len)
@@ -165,5 +217,6 @@ int packet_get_line(struct strbuf *out,
strbuf_add(out, *src_buf, len);
*src_buf += len;
*src_len -= len;
+ packet_trace(out->buf, out->len, 0);
return len;
}