#include "cache.h"
#include "pkt-line.h"
+#include "run-command.h"
+char packet_buffer[LARGE_PACKET_MAX];
static const char *packet_trace_prefix = "git";
-static const char trace_key[] = "GIT_TRACE_PACKET";
+static struct trace_key trace_packet = TRACE_KEY_INIT(PACKET);
+static struct trace_key trace_pack = TRACE_KEY_INIT(PACKFILE);
void packet_trace_identity(const char *prog)
{
packet_trace_prefix = xstrdup(prog);
}
+static const char *get_trace_prefix(void)
+{
+ return in_async() ? "sideband" : packet_trace_prefix;
+}
+
+static int packet_trace_pack(const char *buf, unsigned int len, int sideband)
+{
+ if (!sideband) {
+ trace_verbatim(&trace_pack, buf, len);
+ return 1;
+ } else if (len && *buf == '\1') {
+ trace_verbatim(&trace_pack, buf + 1, len - 1);
+ return 1;
+ } else {
+ /* it's another non-pack sideband */
+ return 0;
+ }
+}
+
static void packet_trace(const char *buf, unsigned int len, int write)
{
int i;
struct strbuf out;
+ static int in_pack, sideband;
+
+ if (!trace_want(&trace_packet) && !trace_want(&trace_pack))
+ return;
+
+ if (in_pack) {
+ if (packet_trace_pack(buf, len, sideband))
+ return;
+ } else if (starts_with(buf, "PACK") || starts_with(buf, "\1PACK")) {
+ in_pack = 1;
+ sideband = *buf == '\1';
+ packet_trace_pack(buf, len, sideband);
+
+ /*
+ * Make a note in the human-readable trace that the pack data
+ * started.
+ */
+ buf = "PACK ...";
+ len = strlen(buf);
+ }
- if (!trace_want(trace_key))
+ if (!trace_want(&trace_packet))
return;
/* +32 is just a guess for header + quoting */
strbuf_init(&out, len+32);
strbuf_addf(&out, "packet: %12s%c ",
- packet_trace_prefix, write ? '>' : '<');
+ get_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]);
- }
+ /* 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);
+ trace_strbuf(&trace_packet, &out);
strbuf_release(&out);
}
}
#define hex(a) (hexchar[(a) & 15])
-static char buffer[1000];
-static unsigned format_packet(const char *fmt, va_list args)
+static void format_packet(struct strbuf *out, const char *fmt, va_list args)
{
static char hexchar[] = "0123456789abcdef";
- unsigned n;
+ size_t orig_len, n;
+
+ orig_len = out->len;
+ strbuf_addstr(out, "0000");
+ strbuf_vaddf(out, fmt, args);
+ n = out->len - orig_len;
- n = vsnprintf(buffer + 4, sizeof(buffer) - 4, fmt, args);
- if (n >= sizeof(buffer)-4)
+ if (n > LARGE_PACKET_MAX)
die("protocol error: impossibly long line");
- n += 4;
- buffer[0] = hex(n >> 12);
- buffer[1] = hex(n >> 8);
- buffer[2] = hex(n >> 4);
- buffer[3] = hex(n);
- packet_trace(buffer+4, n-4, 1);
- return n;
+
+ out->buf[orig_len + 0] = hex(n >> 12);
+ out->buf[orig_len + 1] = hex(n >> 8);
+ out->buf[orig_len + 2] = hex(n >> 4);
+ out->buf[orig_len + 3] = hex(n);
+ packet_trace(out->buf + orig_len + 4, n - 4, 1);
}
void packet_write(int fd, const char *fmt, ...)
{
+ static struct strbuf buf = STRBUF_INIT;
va_list args;
- unsigned n;
+ strbuf_reset(&buf);
va_start(args, fmt);
- n = format_packet(fmt, args);
+ format_packet(&buf, fmt, args);
va_end(args);
- write_or_die(fd, buffer, n);
+ write_or_die(fd, buf.buf, buf.len);
}
void packet_buf_write(struct strbuf *buf, const char *fmt, ...)
{
va_list args;
- unsigned n;
va_start(args, fmt);
- n = format_packet(fmt, args);
+ format_packet(buf, fmt, args);
va_end(args);
- strbuf_add(buf, buffer, n);
}
-static int safe_read(int fd, void *buffer, unsigned size, int return_line_fail)
+static int get_packet_data(int fd, char **src_buf, size_t *src_size,
+ void *dst, unsigned size, int options)
{
- ssize_t ret = read_in_full(fd, buffer, size);
- if (ret < 0)
- die_errno("read error");
- else if (ret < size) {
- if (return_line_fail)
+ ssize_t ret;
+
+ if (fd >= 0 && src_buf && *src_buf)
+ die("BUG: multiple sources given to packet_read");
+
+ /* Read up to "size" bytes from our source, whatever it is. */
+ if (src_buf && *src_buf) {
+ ret = size < *src_size ? size : *src_size;
+ memcpy(dst, *src_buf, ret);
+ *src_buf += ret;
+ *src_size -= ret;
+ } else {
+ ret = read_in_full(fd, dst, size);
+ if (ret < 0)
+ die_errno("read error");
+ }
+
+ /* And complain if we didn't get enough bytes to satisfy the read. */
+ if (ret < size) {
+ if (options & PACKET_READ_GENTLE_ON_EOF)
return -1;
die("The remote end hung up unexpectedly");
return len;
}
-static int packet_read_internal(int fd, char *buffer, unsigned size, int return_line_fail)
+int packet_read(int fd, char **src_buf, size_t *src_len,
+ char *buffer, unsigned size, int options)
{
int len, ret;
char linelen[4];
- ret = safe_read(fd, linelen, 4, return_line_fail);
- if (return_line_fail && ret < 0)
+ ret = get_packet_data(fd, src_buf, src_len, linelen, 4, options);
+ if (ret < 0)
return ret;
len = packet_length(linelen);
if (len < 0)
len -= 4;
if (len >= size)
die("protocol error: bad line length %d", len);
- ret = safe_read(fd, buffer, len, return_line_fail);
- if (return_line_fail && ret < 0)
+ ret = get_packet_data(fd, src_buf, src_len, buffer, len, options);
+ if (ret < 0)
return ret;
+
+ if ((options & PACKET_READ_CHOMP_NEWLINE) &&
+ len && buffer[len-1] == '\n')
+ len--;
+
buffer[len] = 0;
packet_trace(buffer, len, 0);
return len;
}
-int packet_read(int fd, char *buffer, unsigned size)
+static char *packet_read_line_generic(int fd,
+ char **src, size_t *src_len,
+ int *dst_len)
{
- return packet_read_internal(fd, buffer, size, 1);
+ int len = packet_read(fd, src, src_len,
+ packet_buffer, sizeof(packet_buffer),
+ PACKET_READ_CHOMP_NEWLINE);
+ if (dst_len)
+ *dst_len = len;
+ return len ? packet_buffer : NULL;
}
-int packet_read_line(int fd, char *buffer, unsigned size)
+char *packet_read_line(int fd, int *len_p)
{
- return packet_read_internal(fd, buffer, size, 0);
+ return packet_read_line_generic(fd, NULL, NULL, len_p);
}
-int packet_get_line(struct strbuf *out,
- char **src_buf, size_t *src_len)
+char *packet_read_line_buf(char **src, size_t *src_len, int *dst_len)
{
- int len;
-
- if (*src_len < 4)
- return -1;
- len = packet_length(*src_buf);
- if (len < 0)
- return -1;
- if (!len) {
- *src_buf += 4;
- *src_len -= 4;
- packet_trace("0000", 4, 0);
- return 0;
- }
- if (*src_len < len)
- return -2;
-
- *src_buf += 4;
- *src_len -= 4;
- len -= 4;
-
- strbuf_add(out, *src_buf, len);
- *src_buf += len;
- *src_len -= len;
- packet_trace(out->buf, out->len, 0);
- return len;
+ return packet_read_line_generic(-1, src, src_len, dst_len);
}