#include "cache.h"
#include "exec_cmd.h"
+#include "pkt-line.h"
+#include "sideband.h"
#include <sys/wait.h>
-#include <sys/time.h>
-static int finish_pack(const char *pack_tmp_name, const char *me)
+static pid_t setup_sideband(int sideband, const char *me, int fd[2], int xd[2])
{
- int pipe_fd[2];
- pid_t pid;
- char idx[PATH_MAX];
- char final[PATH_MAX];
- char hash[41];
- unsigned char sha1[20];
- char *cp;
- int err = 0;
+ pid_t side_pid;
- if (pipe(pipe_fd) < 0)
- die("%s: unable to set up pipe", me);
-
- strcpy(idx, pack_tmp_name); /* ".git/objects/pack-XXXXXX" */
- cp = strrchr(idx, '/');
- memcpy(cp, "/pidx", 5);
-
- pid = fork();
- if (pid < 0)
- die("git-clone-pack: unable to fork off git-index-pack");
- if (!pid) {
- close(0);
- dup2(pipe_fd[1], 1);
- close(pipe_fd[0]);
- close(pipe_fd[1]);
- execl_git_cmd("index-pack", "-o", idx, pack_tmp_name, NULL);
- error("cannot exec git-index-pack <%s> <%s>",
- idx, pack_tmp_name);
- exit(1);
- }
- close(pipe_fd[1]);
- if (read(pipe_fd[0], hash, 40) != 40) {
- error("%s: unable to read from git-index-pack", me);
- err = 1;
- }
- close(pipe_fd[0]);
-
- for (;;) {
- int status, code;
- int retval = waitpid(pid, &status, 0);
-
- if (retval < 0) {
- if (errno == EINTR)
- continue;
- error("waitpid failed (%s)", strerror(errno));
- goto error_die;
- }
- if (WIFSIGNALED(status)) {
- int sig = WTERMSIG(status);
- error("git-index-pack died of signal %d", sig);
- goto error_die;
- }
- if (!WIFEXITED(status)) {
- error("git-index-pack died of unnatural causes %d",
- status);
- goto error_die;
- }
- code = WEXITSTATUS(status);
- if (code) {
- error("git-index-pack died with error code %d", code);
- goto error_die;
- }
- if (err)
- goto error_die;
- break;
- }
- hash[40] = 0;
- if (get_sha1_hex(hash, sha1)) {
- error("git-index-pack reported nonsense '%s'", hash);
- goto error_die;
+ if (!sideband) {
+ fd[0] = xd[0];
+ fd[1] = xd[1];
+ return 0;
}
- /* Now we have pack in pack_tmp_name[], and
- * idx in idx[]; rename them to their final names.
+ /* xd[] is talking with upload-pack; subprocess reads from
+ * xd[0], spits out band#2 to stderr, and feeds us band#1
+ * through our fd[0].
*/
- snprintf(final, sizeof(final),
- "%s/pack/pack-%s.pack", get_object_directory(), hash);
- move_temp_to_file(pack_tmp_name, final);
- chmod(final, 0444);
- snprintf(final, sizeof(final),
- "%s/pack/pack-%s.idx", get_object_directory(), hash);
- move_temp_to_file(idx, final);
- chmod(final, 0444);
- return 0;
-
- error_die:
- unlink(idx);
- unlink(pack_tmp_name);
- exit(1);
+ if (pipe(fd) < 0)
+ die("%s: unable to set up pipe", me);
+ side_pid = fork();
+ if (side_pid < 0)
+ die("%s: unable to fork off sideband demultiplexer", me);
+ if (!side_pid) {
+ /* subprocess */
+ close(fd[0]);
+ if (xd[0] != xd[1])
+ close(xd[1]);
+ if (recv_sideband(me, xd[0], fd[1], 2))
+ exit(1);
+ exit(0);
+ }
+ close(xd[0]);
+ close(fd[1]);
+ fd[1] = xd[1];
+ return side_pid;
}
-int receive_unpack_pack(int fd[2], const char *me, int quiet)
+static int get_pack(int xd[2], const char *me, int sideband, const char **argv)
{
int status;
- pid_t pid;
+ pid_t pid, side_pid;
+ int fd[2];
+ side_pid = setup_sideband(sideband, me, fd, xd);
pid = fork();
if (pid < 0)
die("%s: unable to fork off git-unpack-objects", me);
dup2(fd[0], 0);
close(fd[0]);
close(fd[1]);
- execl_git_cmd("unpack-objects", quiet ? "-q" : NULL, NULL);
- die("git-unpack-objects exec failed");
+ execv_git_cmd(argv);
+ die("%s exec failed", argv[0]);
}
close(fd[0]);
close(fd[1]);
while (waitpid(pid, &status, 0) < 0) {
if (errno != EINTR)
- die("waiting for git-unpack-objects: %s",
- strerror(errno));
+ die("waiting for %s: %s", argv[0], strerror(errno));
}
if (WIFEXITED(status)) {
int code = WEXITSTATUS(status);
if (code)
- die("git-unpack-objects died with error code %d",
- code);
+ die("%s died with error code %d", argv[0], code);
return 0;
}
if (WIFSIGNALED(status)) {
int sig = WTERMSIG(status);
- die("git-unpack-objects died of signal %d", sig);
+ die("%s died of signal %d", argv[0], sig);
}
- die("git-unpack-objects died of unnatural causes %d", status);
+ die("%s died of unnatural causes %d", argv[0], status);
}
-/*
- * We average out the download speed over this many "events", where
- * an event is a minimum of about half a second. That way, we get
- * a reasonably stable number.
- */
-#define NR_AVERAGE (4)
-
-/*
- * A "binary msec" is a power-of-two-msec, aka 1/1024th of a second.
- * Keeing the time in that format means that "bytes / msecs" means
- * is the same as kB/s (modulo rounding).
- *
- * 1000512 is a magic number (usecs in a second, rounded up by half
- * of 1024, to make "rounding" come out right ;)
- */
-#define usec_to_binarymsec(x) ((int)(x) / (1000512 >> 10))
-
-int receive_keep_pack(int fd[2], const char *me, int quiet)
+int receive_unpack_pack(int xd[2], const char *me, int quiet, int sideband)
{
- char tmpfile[PATH_MAX];
- int ofd, ifd;
- unsigned long total;
- static struct timeval prev_tv;
- struct average {
- unsigned long bytes;
- unsigned long time;
- } download[NR_AVERAGE] = { {0, 0}, };
- unsigned long avg_bytes, avg_time;
- int idx = 0;
-
- ifd = fd[0];
- snprintf(tmpfile, sizeof(tmpfile),
- "%s/pack/tmp-XXXXXX", get_object_directory());
- ofd = mkstemp(tmpfile);
- if (ofd < 0)
- return error("unable to create temporary file %s", tmpfile);
-
- gettimeofday(&prev_tv, NULL);
- total = 0;
- avg_bytes = 0;
- avg_time = 0;
- while (1) {
- char buf[8192];
- ssize_t sz, wsz, pos;
- sz = read(ifd, buf, sizeof(buf));
- if (sz == 0)
- break;
- if (sz < 0) {
- if (errno != EINTR && errno != EAGAIN) {
- error("error reading pack (%s)", strerror(errno));
- close(ofd);
- unlink(tmpfile);
- return -1;
- }
- sz = 0;
- }
- pos = 0;
- while (pos < sz) {
- wsz = write(ofd, buf + pos, sz - pos);
- if (wsz < 0) {
- error("error writing pack (%s)",
- strerror(errno));
- close(ofd);
- unlink(tmpfile);
- return -1;
- }
- pos += wsz;
- }
- total += sz;
- if (!quiet) {
- static unsigned long last;
- struct timeval tv;
- unsigned long diff = total - last;
- /* not really "msecs", but a power-of-two millisec (1/1024th of a sec) */
- unsigned long msecs;
-
- gettimeofday(&tv, NULL);
- msecs = tv.tv_sec - prev_tv.tv_sec;
- msecs <<= 10;
- msecs += usec_to_binarymsec(tv.tv_usec - prev_tv.tv_usec);
-
- if (msecs > 500) {
- prev_tv = tv;
- last = total;
-
- /* Update averages ..*/
- avg_bytes += diff;
- avg_time += msecs;
- avg_bytes -= download[idx].bytes;
- avg_time -= download[idx].time;
- download[idx].bytes = diff;
- download[idx].time = msecs;
- idx++;
- if (idx >= NR_AVERAGE)
- idx = 0;
+ const char *argv[3] = { "unpack-objects", quiet ? "-q" : NULL, NULL };
+ return get_pack(xd, me, sideband, argv);
+}
- fprintf(stderr, "%4lu.%03luMB (%lu kB/s) \r",
- total >> 20,
- 1000*((total >> 10) & 1023)>>10,
- avg_bytes / avg_time );
- }
- }
- }
- close(ofd);
- return finish_pack(tmpfile, me);
+int receive_keep_pack(int xd[2], const char *me, int quiet, int sideband)
+{
+ const char *argv[5] = { "index-pack", "--stdin", "--fix-thin",
+ quiet ? NULL : "-v", NULL };
+ return get_pack(xd, me, sideband, argv);
}