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authorJunio C Hamano <junkio@cox.net>2005-12-14 22:17:38 -0800
committerJunio C Hamano <junkio@cox.net>2005-12-17 23:11:29 -0800
commitad8972150887a8ed3dd4869fc9318cc2e48dd69f (patch)
tree14caab692aff3f2be7365e7c6f18fa1e5aa3dfe3 /fetch-clone.c
parentc054d64e8783e5ac2fa68c382f00df9087bca0f9 (diff)
downloadgit-ad8972150887a8ed3dd4869fc9318cc2e48dd69f.tar.gz
fetch-pack: -k option to keep downloaded pack.
Split out the functions that deal with the socketpair after finishing git protocol handshake to receive the packed data into a separate file, and use it in fetch-pack to keep/explode the received pack data. We earlier had something like that on clone-pack side once, but the list discussion resulted in the decision that it makes sense to always keep the pack for clone-pack, so unpacking option is not enabled on the clone-pack side, but we later still could do so easily if we wanted to with this change. Signed-off-by: Junio C Hamano <junkio@cox.net>
Diffstat (limited to 'fetch-clone.c')
-rw-r--r--fetch-clone.c172
1 files changed, 172 insertions, 0 deletions
diff --git a/fetch-clone.c b/fetch-clone.c
new file mode 100644
index 0000000000..2b2aa15ea7
--- /dev/null
+++ b/fetch-clone.c
@@ -0,0 +1,172 @@
+#include "cache.h"
+#include <sys/wait.h>
+
+static int finish_pack(const char *pack_tmp_name, const char *me)
+{
+ 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;
+
+ 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]);
+ execlp("git-index-pack","git-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(retval));
+ 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;
+ }
+ /* Now we have pack in pack_tmp_name[], and
+ * idx in idx[]; rename them to their final names.
+ */
+ 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);
+}
+
+int receive_unpack_pack(int fd[2], const char *me, int quiet)
+{
+ int status;
+ pid_t pid;
+
+ pid = fork();
+ if (pid < 0)
+ die("%s: unable to fork off git-unpack-objects", me);
+ if (!pid) {
+ dup2(fd[0], 0);
+ close(fd[0]);
+ close(fd[1]);
+ execlp("git-unpack-objects", "git-unpack-objects",
+ quiet ? "-q" : NULL, NULL);
+ die("git-unpack-objects exec failed");
+ }
+ close(fd[0]);
+ close(fd[1]);
+ while (waitpid(pid, &status, 0) < 0) {
+ if (errno != EINTR)
+ die("waiting for git-unpack-objects: %s",
+ strerror(errno));
+ }
+ if (WIFEXITED(status)) {
+ int code = WEXITSTATUS(status);
+ if (code)
+ die("git-unpack-objects died with error code %d",
+ code);
+ return 0;
+ }
+ if (WIFSIGNALED(status)) {
+ int sig = WTERMSIG(status);
+ die("git-unpack-objects died of signal %d", sig);
+ }
+ die("git-unpack-objects died of unnatural causes %d", status);
+}
+
+int receive_keep_pack(int fd[2], const char *me)
+{
+ char tmpfile[PATH_MAX];
+ int ofd, ifd;
+
+ 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);
+
+ while (1) {
+ char buf[8192];
+ ssize_t sz, wsz, pos;
+ sz = read(ifd, buf, sizeof(buf));
+ if (sz == 0)
+ break;
+ if (sz < 0) {
+ error("error reading pack (%s)", strerror(errno));
+ close(ofd);
+ unlink(tmpfile);
+ return -1;
+ }
+ 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;
+ }
+ }
+ close(ofd);
+ return finish_pack(tmpfile, me);
+}