X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=upload-pack.c;h=7e04311027176fc87c1de7dd619000d2a75d4eb9;hb=9fac800cae287256cea0512f5c5effae7a7aa784;hp=fe96ef15c43fa6e3f8f947f84ddce3c498e82859;hpb=0f2890acd999e63892d0b5b401e70bdaefe3ba51;p=git.git

diff --git a/upload-pack.c b/upload-pack.c
index fe96ef15c..7e0431102 100644
--- a/upload-pack.c
+++ b/upload-pack.c
@@ -9,6 +9,7 @@
 #include "diff.h"
 #include "revision.h"
 #include "list-objects.h"
+#include "run-command.h"
 
 static const char upload_pack_usage[] = "git-upload-pack [--strict] [--timeout=nn] <dir>";
 
@@ -96,117 +97,87 @@ static void show_edge(struct commit *commit)
 	fprintf(pack_pipe, "-%s\n", sha1_to_hex(commit->object.sha1));
 }
 
+static int do_rev_list(int fd, void *create_full_pack)
+{
+	int i;
+	struct rev_info revs;
+
+	pack_pipe = fdopen(fd, "w");
+	if (create_full_pack)
+		use_thin_pack = 0; /* no point doing it */
+	init_revisions(&revs, NULL);
+	revs.tag_objects = 1;
+	revs.tree_objects = 1;
+	revs.blob_objects = 1;
+	if (use_thin_pack)
+		revs.edge_hint = 1;
+
+	if (create_full_pack) {
+		const char *args[] = {"rev-list", "--all", NULL};
+		setup_revisions(2, args, &revs, NULL);
+	} else {
+		for (i = 0; i < want_obj.nr; i++) {
+			struct object *o = want_obj.objects[i].item;
+			/* why??? */
+			o->flags &= ~UNINTERESTING;
+			add_pending_object(&revs, o, NULL);
+		}
+		for (i = 0; i < have_obj.nr; i++) {
+			struct object *o = have_obj.objects[i].item;
+			o->flags |= UNINTERESTING;
+			add_pending_object(&revs, o, NULL);
+		}
+		setup_revisions(0, NULL, &revs, NULL);
+	}
+	prepare_revision_walk(&revs);
+	mark_edges_uninteresting(revs.commits, &revs, show_edge);
+	traverse_commit_list(&revs, show_commit, show_object);
+	return 0;
+}
+
 static void create_pack_file(void)
 {
-	/* Pipes between rev-list to pack-objects, pack-objects to us
-	 * and pack-objects error stream for progress bar.
-	 */
-	int lp_pipe[2], pu_pipe[2], pe_pipe[2];
-	pid_t pid_rev_list, pid_pack_objects;
+	struct async rev_list;
+	struct child_process pack_objects;
 	int create_full_pack = (nr_our_refs == want_obj.nr && !have_obj.nr);
 	char data[8193], progress[128];
 	char abort_msg[] = "aborting due to possible repository "
 		"corruption on the remote side.";
 	int buffered = -1;
-
-	if (pipe(lp_pipe) < 0)
-		die("git-upload-pack: unable to create pipe");
-	pid_rev_list = fork();
-	if (pid_rev_list < 0)
+	ssize_t sz;
+	const char *argv[10];
+	int arg = 0;
+
+	rev_list.proc = do_rev_list;
+	/* .data is just a boolean: any non-NULL value will do */
+	rev_list.data = create_full_pack ? &rev_list : NULL;
+	if (start_async(&rev_list))
 		die("git-upload-pack: unable to fork git-rev-list");
 
-	if (!pid_rev_list) {
-		int i;
-		struct rev_info revs;
-
-		close(lp_pipe[0]);
-		pack_pipe = fdopen(lp_pipe[1], "w");
-
-		if (create_full_pack)
-			use_thin_pack = 0; /* no point doing it */
-		init_revisions(&revs, NULL);
-		revs.tag_objects = 1;
-		revs.tree_objects = 1;
-		revs.blob_objects = 1;
-		if (use_thin_pack)
-			revs.edge_hint = 1;
-
-		if (create_full_pack) {
-			const char *args[] = {"rev-list", "--all", NULL};
-			setup_revisions(2, args, &revs, NULL);
-		} else {
-			for (i = 0; i < want_obj.nr; i++) {
-				struct object *o = want_obj.objects[i].item;
-				/* why??? */
-				o->flags &= ~UNINTERESTING;
-				add_pending_object(&revs, o, NULL);
-			}
-			for (i = 0; i < have_obj.nr; i++) {
-				struct object *o = have_obj.objects[i].item;
-				o->flags |= UNINTERESTING;
-				add_pending_object(&revs, o, NULL);
-			}
-			setup_revisions(0, NULL, &revs, NULL);
-		}
-		prepare_revision_walk(&revs);
-		mark_edges_uninteresting(revs.commits, &revs, show_edge);
-		traverse_commit_list(&revs, show_commit, show_object);
-		exit(0);
-	}
-
-	if (pipe(pu_pipe) < 0)
-		die("git-upload-pack: unable to create pipe");
-	if (pipe(pe_pipe) < 0)
-		die("git-upload-pack: unable to create pipe");
-	pid_pack_objects = fork();
-	if (pid_pack_objects < 0) {
-		/* daemon sets things up to ignore TERM */
-		kill(pid_rev_list, SIGKILL);
+	argv[arg++] = "pack-objects";
+	argv[arg++] = "--stdout";
+	if (!no_progress)
+		argv[arg++] = "--progress";
+	if (use_ofs_delta)
+		argv[arg++] = "--delta-base-offset";
+	argv[arg++] = NULL;
+
+	memset(&pack_objects, 0, sizeof(pack_objects));
+	pack_objects.in = rev_list.out;	/* start_command closes it */
+	pack_objects.out = -1;
+	pack_objects.err = -1;
+	pack_objects.git_cmd = 1;
+	pack_objects.argv = argv;
+
+	if (start_command(&pack_objects))
 		die("git-upload-pack: unable to fork git-pack-objects");
-	}
-	if (!pid_pack_objects) {
-		const char *argv[10];
-		int i = 0;
-
-		dup2(lp_pipe[0], 0);
-		dup2(pu_pipe[1], 1);
-		dup2(pe_pipe[1], 2);
-
-		close(lp_pipe[0]);
-		close(lp_pipe[1]);
-		close(pu_pipe[0]);
-		close(pu_pipe[1]);
-		close(pe_pipe[0]);
-		close(pe_pipe[1]);
-
-		argv[i++] = "pack-objects";
-		argv[i++] = "--stdout";
-		if (!no_progress)
-			argv[i++] = "--progress";
-		if (use_ofs_delta)
-			argv[i++] = "--delta-base-offset";
-		argv[i++] = NULL;
-
-		execv_git_cmd(argv);
-		kill(pid_rev_list, SIGKILL);
-		die("git-upload-pack: unable to exec git-pack-objects");
-	}
 
-	close(lp_pipe[0]);
-	close(lp_pipe[1]);
-
-	/* We read from pe_pipe[0] to capture stderr output for
-	 * progress bar, and pu_pipe[0] to capture the pack data.
+	/* We read from pack_objects.err to capture stderr output for
+	 * progress bar, and pack_objects.out to capture the pack data.
 	 */
-	close(pe_pipe[1]);
-	close(pu_pipe[1]);
 
 	while (1) {
-		const char *who;
 		struct pollfd pfd[2];
-		pid_t pid;
-		int status;
-		ssize_t sz;
 		int pe, pu, pollsize;
 
 		reset_timeout();
@@ -214,136 +185,104 @@ static void create_pack_file(void)
 		pollsize = 0;
 		pe = pu = -1;
 
-		if (0 <= pu_pipe[0]) {
-			pfd[pollsize].fd = pu_pipe[0];
+		if (0 <= pack_objects.out) {
+			pfd[pollsize].fd = pack_objects.out;
 			pfd[pollsize].events = POLLIN;
 			pu = pollsize;
 			pollsize++;
 		}
-		if (0 <= pe_pipe[0]) {
-			pfd[pollsize].fd = pe_pipe[0];
+		if (0 <= pack_objects.err) {
+			pfd[pollsize].fd = pack_objects.err;
 			pfd[pollsize].events = POLLIN;
 			pe = pollsize;
 			pollsize++;
 		}
 
-		if (pollsize) {
-			if (poll(pfd, pollsize, -1) < 0) {
-				if (errno != EINTR) {
-					error("poll failed, resuming: %s",
-					      strerror(errno));
-					sleep(1);
-				}
-				continue;
-			}
-			if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) {
-				/* Data ready; we keep the last byte
-				 * to ourselves in case we detect
-				 * broken rev-list, so that we can
-				 * leave the stream corrupted.  This
-				 * is unfortunate -- unpack-objects
-				 * would happily accept a valid pack
-				 * data with trailing garbage, so
-				 * appending garbage after we pass all
-				 * the pack data is not good enough to
-				 * signal breakage to downstream.
-				 */
-				char *cp = data;
-				ssize_t outsz = 0;
-				if (0 <= buffered) {
-					*cp++ = buffered;
-					outsz++;
-				}
-				sz = xread(pu_pipe[0], cp,
-					  sizeof(data) - outsz);
-				if (0 < sz)
-						;
-				else if (sz == 0) {
-					close(pu_pipe[0]);
-					pu_pipe[0] = -1;
-				}
-				else
-					goto fail;
-				sz += outsz;
-				if (1 < sz) {
-					buffered = data[sz-1] & 0xFF;
-					sz--;
-				}
-				else
-					buffered = -1;
-				sz = send_client_data(1, data, sz);
-				if (sz < 0)
-					goto fail;
-			}
-			if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) {
-				/* Status ready; we ship that in the side-band
-				 * or dump to the standard error.
-				 */
-				sz = xread(pe_pipe[0], progress,
-					  sizeof(progress));
-				if (0 < sz)
-					send_client_data(2, progress, sz);
-				else if (sz == 0) {
-					close(pe_pipe[0]);
-					pe_pipe[0] = -1;
-				}
-				else
-					goto fail;
+		if (!pollsize)
+			break;
+
+		if (poll(pfd, pollsize, -1) < 0) {
+			if (errno != EINTR) {
+				error("poll failed, resuming: %s",
+				      strerror(errno));
+				sleep(1);
 			}
+			continue;
 		}
-
-		/* See if the children are still there */
-		if (pid_rev_list || pid_pack_objects) {
-			pid = waitpid(-1, &status, WNOHANG);
-			if (!pid)
-				continue;
-			who = ((pid == pid_rev_list) ? "git-rev-list" :
-			       (pid == pid_pack_objects) ? "git-pack-objects" :
-			       NULL);
-			if (!who) {
-				if (pid < 0) {
-					error("git-upload-pack: %s",
-					      strerror(errno));
-					goto fail;
-				}
-				error("git-upload-pack: we weren't "
-				      "waiting for %d", pid);
-				continue;
+		if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) {
+			/* Data ready; we keep the last byte to ourselves
+			 * in case we detect broken rev-list, so that we
+			 * can leave the stream corrupted.  This is
+			 * unfortunate -- unpack-objects would happily
+			 * accept a valid packdata with trailing garbage,
+			 * so appending garbage after we pass all the
+			 * pack data is not good enough to signal
+			 * breakage to downstream.
+			 */
+			char *cp = data;
+			ssize_t outsz = 0;
+			if (0 <= buffered) {
+				*cp++ = buffered;
+				outsz++;
+			}
+			sz = xread(pack_objects.out, cp,
+				  sizeof(data) - outsz);
+			if (0 < sz)
+					;
+			else if (sz == 0) {
+				close(pack_objects.out);
+				pack_objects.out = -1;
 			}
-			if (!WIFEXITED(status) || WEXITSTATUS(status) > 0) {
-				error("git-upload-pack: %s died with error.",
-				      who);
+			else
 				goto fail;
+			sz += outsz;
+			if (1 < sz) {
+				buffered = data[sz-1] & 0xFF;
+				sz--;
 			}
-			if (pid == pid_rev_list)
-				pid_rev_list = 0;
-			if (pid == pid_pack_objects)
-				pid_pack_objects = 0;
-			if (pid_rev_list || pid_pack_objects)
-				continue;
-		}
-
-		/* both died happily */
-		if (pollsize)
-			continue;
-
-		/* flush the data */
-		if (0 <= buffered) {
-			data[0] = buffered;
-			sz = send_client_data(1, data, 1);
+			else
+				buffered = -1;
+			sz = send_client_data(1, data, sz);
 			if (sz < 0)
 				goto fail;
-			fprintf(stderr, "flushed.\n");
 		}
-		if (use_sideband)
-			packet_flush(1);
-		return;
+		if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) {
+			/* Status ready; we ship that in the side-band
+			 * or dump to the standard error.
+			 */
+			sz = xread(pack_objects.err, progress,
+				  sizeof(progress));
+			if (0 < sz)
+				send_client_data(2, progress, sz);
+			else if (sz == 0) {
+				close(pack_objects.err);
+				pack_objects.err = -1;
+			}
+			else
+				goto fail;
+		}
 	}
+
+	if (finish_command(&pack_objects)) {
+		error("git-upload-pack: git-pack-objects died with error.");
+		goto fail;
+	}
+	if (finish_async(&rev_list))
+		goto fail;	/* error was already reported */
+
+	/* flush the data */
+	if (0 <= buffered) {
+		data[0] = buffered;
+		sz = send_client_data(1, data, 1);
+		if (sz < 0)
+			goto fail;
+		fprintf(stderr, "flushed.\n");
+	}
+	if (use_sideband)
+		packet_flush(1);
+	return;
+
  fail:
-	if (pid_pack_objects)
-		kill(pid_pack_objects, SIGKILL);
-	if (pid_rev_list)
-		kill(pid_rev_list, SIGKILL);
 	send_client_data(3, abort_msg, sizeof(abort_msg));
 	die("git-upload-pack: %s", abort_msg);
 }