[thirdparty/git.git] / fetch-clone.c

#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(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;
	}
	/* 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);
}
Commit	Line	Data
ad897215 JH	1	#include "cache.h"
	2	#include <sys/wait.h>
	3
	4	static int finish_pack(const char pack_tmp_name, const char me)
	5	{
	6	int pipe_fd[2];
	7	pid_t pid;
	8	char idx[PATH_MAX];
	9	char final[PATH_MAX];
	10	char hash[41];
	11	unsigned char sha1[20];
	12	char *cp;
	13	int err = 0;
	14
	15	if (pipe(pipe_fd) < 0)
	16	die("%s: unable to set up pipe", me);
	17
	18	strcpy(idx, pack_tmp_name); /* ".git/objects/pack-XXXXXX" */
	19	cp = strrchr(idx, '/');
	20	memcpy(cp, "/pidx", 5);
	21
	22	pid = fork();
	23	if (pid < 0)
	24	die("git-clone-pack: unable to fork off git-index-pack");
	25	if (!pid) {
	26	close(0);
	27	dup2(pipe_fd[1], 1);
	28	close(pipe_fd[0]);
	29	close(pipe_fd[1]);
	30	execlp("git-index-pack","git-index-pack",
	31	"-o", idx, pack_tmp_name, NULL);
	32	error("cannot exec git-index-pack <%s> <%s>",
	33	idx, pack_tmp_name);
	34	exit(1);
	35	}
	36	close(pipe_fd[1]);
	37	if (read(pipe_fd[0], hash, 40) != 40) {
	38	error("%s: unable to read from git-index-pack", me);
	39	err = 1;
	40	}
	41	close(pipe_fd[0]);
	42
	43	for (;;) {
	44	int status, code;
	45	int retval = waitpid(pid, &status, 0);
	46
	47	if (retval < 0) {
	48	if (errno == EINTR)
	49	continue;
7f272ca8	50	error("waitpid failed (%s)", strerror(errno));
ad897215 JH	51	goto error_die;
	52	}
	53	if (WIFSIGNALED(status)) {
	54	int sig = WTERMSIG(status);
	55	error("git-index-pack died of signal %d", sig);
	56	goto error_die;
	57	}
	58	if (!WIFEXITED(status)) {
	59	error("git-index-pack died of unnatural causes %d",
	60	status);
	61	goto error_die;
	62	}
	63	code = WEXITSTATUS(status);
	64	if (code) {
	65	error("git-index-pack died with error code %d", code);
	66	goto error_die;
	67	}
	68	if (err)
	69	goto error_die;
	70	break;
	71	}
	72	hash[40] = 0;
	73	if (get_sha1_hex(hash, sha1)) {
	74	error("git-index-pack reported nonsense '%s'", hash);
	75	goto error_die;
	76	}
	77	/* Now we have pack in pack_tmp_name[], and
	78	* idx in idx[]; rename them to their final names.
	79	*/
	80	snprintf(final, sizeof(final),
	81	"%s/pack/pack-%s.pack", get_object_directory(), hash);
	82	move_temp_to_file(pack_tmp_name, final);
	83	chmod(final, 0444);
	84	snprintf(final, sizeof(final),
	85	"%s/pack/pack-%s.idx", get_object_directory(), hash);
	86	move_temp_to_file(idx, final);
	87	chmod(final, 0444);
	88	return 0;
	89
	90	error_die:
	91	unlink(idx);
	92	unlink(pack_tmp_name);
	93	exit(1);
	94	}
	95
	96	int receive_unpack_pack(int fd[2], const char *me, int quiet)
	97	{
	98	int status;
	99	pid_t pid;
	100
	101	pid = fork();
	102	if (pid < 0)
	103	die("%s: unable to fork off git-unpack-objects", me);
	104	if (!pid) {
	105	dup2(fd[0], 0);
	106	close(fd[0]);
	107	close(fd[1]);
	108	execlp("git-unpack-objects", "git-unpack-objects",
	109	quiet ? "-q" : NULL, NULL);
	110	die("git-unpack-objects exec failed");
	111	}
	112	close(fd[0]);
	113	close(fd[1]);
	114	while (waitpid(pid, &status, 0) < 0) {
115	if (errno != EINTR)
116	die("waiting for git-unpack-objects: %s",
117	strerror(errno));
118	}
119	if (WIFEXITED(status)) {
120	int code = WEXITSTATUS(status);
121	if (code)
122	die("git-unpack-objects died with error code %d",
123	code);
124	return 0;
125	}
126	if (WIFSIGNALED(status)) {
127	int sig = WTERMSIG(status);
128	die("git-unpack-objects died of signal %d", sig);
129	}
130	die("git-unpack-objects died of unnatural causes %d", status);
131	}
132
133	int receive_keep_pack(int fd[2], const char *me)
134	{
135	char tmpfile[PATH_MAX];
136	int ofd, ifd;
137
138	ifd = fd[0];
139	snprintf(tmpfile, sizeof(tmpfile),
140	"%s/pack/tmp-XXXXXX", get_object_directory());
141	ofd = mkstemp(tmpfile);
142	if (ofd < 0)
143	return error("unable to create temporary file %s", tmpfile);
144
145	while (1) {
146	char buf[8192];
147	ssize_t sz, wsz, pos;
148	sz = read(ifd, buf, sizeof(buf));
149	if (sz == 0)
150	break;
151	if (sz < 0) {
152	error("error reading pack (%s)", strerror(errno));
153	close(ofd);
154	unlink(tmpfile);
155	return -1;
156	}
157	pos = 0;
158	while (pos < sz) {
159	wsz = write(ofd, buf + pos, sz - pos);
160	if (wsz < 0) {
161	error("error writing pack (%s)",
162	strerror(errno));
163	close(ofd);
164	unlink(tmpfile);
165	return -1;
166	}
167	pos += wsz;
168	}
169	}
170	close(ofd);
171	return finish_pack(tmpfile, me);
172	}