[thirdparty/git.git] / connect.c

#include "cache.h"
#include "pkt-line.h"
#include "quote.h"
#include "refs.h"
#include <sys/wait.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>

/*
 * Read all the refs from the other end
 */
struct ref **get_remote_heads(int in, struct ref **list,
			      int nr_match, char **match, int ignore_funny)
{
	*list = NULL;
	for (;;) {
		struct ref *ref;
		unsigned char old_sha1[20];
		static char buffer[1000];
		char *name;
		int len;

		len = packet_read_line(in, buffer, sizeof(buffer));
		if (!len)
			break;
		if (buffer[len-1] == '\n')
			buffer[--len] = 0;

		if (len < 42 || get_sha1_hex(buffer, old_sha1) || buffer[40] != ' ')
			die("protocol error: expected sha/ref, got '%s'", buffer);
		name = buffer + 41;

		if (ignore_funny && 45 < len && !memcmp(name, "refs/", 5) &&
		    check_ref_format(name + 5))
			continue;

		if (nr_match && !path_match(name, nr_match, match))
			continue;
		ref = xcalloc(1, sizeof(*ref) + len - 40);
		memcpy(ref->old_sha1, old_sha1, 20);
		memcpy(ref->name, buffer + 41, len - 40);
		*list = ref;
		list = &ref->next;
	}
	return list;
}

int get_ack(int fd, unsigned char *result_sha1)
{
	static char line[1000];
	int len = packet_read_line(fd, line, sizeof(line));

	if (!len)
		die("git-fetch-pack: expected ACK/NAK, got EOF");
	if (line[len-1] == '\n')
		line[--len] = 0;
	if (!strcmp(line, "NAK"))
		return 0;
	if (!strncmp(line, "ACK ", 3)) {
		if (!get_sha1_hex(line+4, result_sha1))
			return 1;
	}
	die("git-fetch_pack: expected ACK/NAK, got '%s'", line);
}

int path_match(const char *path, int nr, char **match)
{
	int i;
	int pathlen = strlen(path);

	for (i = 0; i < nr; i++) {
		char *s = match[i];
		int len = strlen(s);

		if (!len || len > pathlen)
			continue;
		if (memcmp(path + pathlen - len, s, len))
			continue;
		if (pathlen > len && path[pathlen - len - 1] != '/')
			continue;
		*s = 0;
		return 1;
	}
	return 0;
}

struct refspec {
	char *src;
	char *dst;
	char force;
};

/*
 * A:B means fast forward remote B with local A.
 * +A:B means overwrite remote B with local A.
 * +A is a shorthand for +A:A.
 * A is a shorthand for A:A.
 */
static struct refspec *parse_ref_spec(int nr_refspec, char **refspec)
{
	int i;
	struct refspec *rs = xcalloc(sizeof(*rs), (nr_refspec + 1));
	for (i = 0; i < nr_refspec; i++) {
		char *sp, *dp, *ep;
		sp = refspec[i];
		if (*sp == '+') {
			rs[i].force = 1;
			sp++;
		}
		ep = strchr(sp, ':');
		if (ep) {
			dp = ep + 1;
			*ep = 0;
		}
		else
			dp = sp;
		rs[i].src = sp;
		rs[i].dst = dp;
	}
	rs[nr_refspec].src = rs[nr_refspec].dst = NULL;
	return rs;
}

static int count_refspec_match(const char *pattern,
			       struct ref *refs,
			       struct ref **matched_ref)
{
	int match;
	int patlen = strlen(pattern);

	for (match = 0; refs; refs = refs->next) {
		char *name = refs->name;
		int namelen = strlen(name);
		if (namelen < patlen ||
		    memcmp(name + namelen - patlen, pattern, patlen))
			continue;
		if (namelen != patlen && name[namelen - patlen - 1] != '/')
			continue;
		match++;
		*matched_ref = refs;
	}
	return match;
}

static void link_dst_tail(struct ref *ref, struct ref ***tail)
{
	**tail = ref;
	*tail = &ref->next;
	**tail = NULL;
}

static struct ref *try_explicit_object_name(const char *name)
{
	unsigned char sha1[20];
	struct ref *ref;
	int len;
	if (get_sha1(name, sha1))
		return NULL;
	len = strlen(name) + 1;
	ref = xcalloc(1, sizeof(*ref) + len);
	memcpy(ref->name, name, len);
	memcpy(ref->new_sha1, sha1, 20);
	return ref;
}

static int match_explicit_refs(struct ref *src, struct ref *dst,
			       struct ref ***dst_tail, struct refspec *rs)
{
	int i, errs;
	for (i = errs = 0; rs[i].src; i++) {
		struct ref *matched_src, *matched_dst;

		matched_src = matched_dst = NULL;
		switch (count_refspec_match(rs[i].src, src, &matched_src)) {
		case 1:
			break;
		case 0:
			/* The source could be in the get_sha1() format
			 * not a reference name.
			 */
			matched_src = try_explicit_object_name(rs[i].src);
			if (matched_src)
				break;
			errs = 1;
			error("src refspec %s does not match any.",
			      rs[i].src);
			break;
		default:
			errs = 1;
			error("src refspec %s matches more than one.",
			      rs[i].src);
			break;
		}
		switch (count_refspec_match(rs[i].dst, dst, &matched_dst)) {
		case 1:
			break;
		case 0:
			if (!memcmp(rs[i].dst, "refs/", 5)) {
				int len = strlen(rs[i].dst) + 1;
				matched_dst = xcalloc(1, sizeof(*dst) + len);
				memcpy(matched_dst->name, rs[i].dst, len);
				link_dst_tail(matched_dst, dst_tail);
			}
			else if (!strcmp(rs[i].src, rs[i].dst) &&
				 matched_src) {
				/* pushing "master:master" when
				 * remote does not have master yet.
				 */
				int len = strlen(matched_src->name) + 1;
				matched_dst = xcalloc(1, sizeof(*dst) + len);
				memcpy(matched_dst->name, matched_src->name,
				       len);
				link_dst_tail(matched_dst, dst_tail);
			}
			else {
				errs = 1;
				error("dst refspec %s does not match any "
				      "existing ref on the remote and does "
				      "not start with refs/.", rs[i].dst);
			}
			break;
		default:
			errs = 1;
			error("dst refspec %s matches more than one.",
			      rs[i].dst);
			break;
		}
		if (errs)
			continue;
		if (matched_dst->peer_ref) {
			errs = 1;
			error("dst ref %s receives from more than one src.",
			      matched_dst->name);
		}
		else {
			matched_dst->peer_ref = matched_src;
			matched_dst->force = rs[i].force;
		}
	}
	return -errs;
}

static struct ref *find_ref_by_name(struct ref *list, const char *name)
{
	for ( ; list; list = list->next)
		if (!strcmp(list->name, name))
			return list;
	return NULL;
}

int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
	       int nr_refspec, char **refspec, int all)
{
	struct refspec *rs = parse_ref_spec(nr_refspec, refspec);

	if (nr_refspec)
		return match_explicit_refs(src, dst, dst_tail, rs);

	/* pick the remainder */
	for ( ; src; src = src->next) {
		struct ref *dst_peer;
		if (src->peer_ref)
			continue;
		dst_peer = find_ref_by_name(dst, src->name);
		if ((dst_peer && dst_peer->peer_ref) || (!dst_peer && !all))
			continue;
		if (!dst_peer) {
			/* Create a new one and link it */
			int len = strlen(src->name) + 1;
			dst_peer = xcalloc(1, sizeof(*dst_peer) + len);
			memcpy(dst_peer->name, src->name, len);
			memcpy(dst_peer->new_sha1, src->new_sha1, 20);
			link_dst_tail(dst_peer, dst_tail);
		}
		dst_peer->peer_ref = src;
	}
	return 0;
}

enum protocol {
	PROTO_LOCAL = 1,
	PROTO_SSH,
	PROTO_GIT,
};

static enum protocol get_protocol(const char *name)
{
	if (!strcmp(name, "ssh"))
		return PROTO_SSH;
	if (!strcmp(name, "git"))
		return PROTO_GIT;
	if (!strcmp(name, "git+ssh"))
		return PROTO_SSH;
	if (!strcmp(name, "ssh+git"))
		return PROTO_SSH;
	die("I don't handle protocol '%s'", name);
}

#define STR_(s)	# s
#define STR(s)	STR_(s)

#ifndef NO_IPV6

static int git_tcp_connect(int fd[2], const char *prog, char *host, char *path)
{
	int sockfd = -1;
	char *colon, *end;
	char *port = STR(DEFAULT_GIT_PORT);
	struct addrinfo hints, *ai0, *ai;
	int gai;

	if (host[0] == '[') {
		end = strchr(host + 1, ']');
		if (end) {
			*end = 0;
			end++;
			host++;
		} else
			end = host;
	} else
		end = host;
	colon = strchr(end, ':');

	if (colon) {
		*colon = 0;
		port = colon + 1;
	}

	memset(&hints, 0, sizeof(hints));
	hints.ai_socktype = SOCK_STREAM;
	hints.ai_protocol = IPPROTO_TCP;

	gai = getaddrinfo(host, port, &hints, &ai);
	if (gai)
		die("Unable to look up %s (%s)", host, gai_strerror(gai));

	for (ai0 = ai; ai; ai = ai->ai_next) {
		sockfd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
		if (sockfd < 0)
			continue;
		if (connect(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) {
			close(sockfd);
			sockfd = -1;
			continue;
		}
		break;
	}

	freeaddrinfo(ai0);

	if (sockfd < 0)
		die("unable to connect a socket (%s)", strerror(errno));

	fd[0] = sockfd;
	fd[1] = sockfd;
	packet_write(sockfd, "%s %s\n", prog, path);
	return 0;
}

#else /* NO_IPV6 */

static int git_tcp_connect(int fd[2], const char *prog, char *host, char *path)
{
	int sockfd = -1;
	char *colon, *end;
	char *port = STR(DEFAULT_GIT_PORT), *ep;
	struct hostent *he;
	struct sockaddr_in sa;
	char **ap;
	unsigned int nport;

	if (host[0] == '[') {
		end = strchr(host + 1, ']');
		if (end) {
			*end = 0;
			end++;
			host++;
		} else
			end = host;
	} else
		end = host;
	colon = strchr(end, ':');

	if (colon) {
		*colon = 0;
		port = colon + 1;
	}


	he = gethostbyname(host);
	if (!he)
		die("Unable to look up %s (%s)", host, hstrerror(h_errno));
	nport = strtoul(port, &ep, 10);
	if ( ep == port || *ep ) {
		/* Not numeric */
		struct servent *se = getservbyname(port,"tcp");
		if ( !se )
			die("Unknown port %s\n", port);
		nport = se->s_port;
	}

	for (ap = he->h_addr_list; *ap; ap++) {
		sockfd = socket(he->h_addrtype, SOCK_STREAM, 0);
		if (sockfd < 0)
			continue;

		memset(&sa, 0, sizeof sa);
		sa.sin_family = he->h_addrtype;
		sa.sin_port = htons(nport);
		memcpy(&sa.sin_addr, ap, he->h_length);

		if (connect(sockfd, (struct sockaddr *)&sa, sizeof sa) < 0) {
			close(sockfd);
			sockfd = -1;
			continue;
		}
		break;
	}

	if (sockfd < 0)
		die("unable to connect a socket (%s)", strerror(errno));

	fd[0] = sockfd;
	fd[1] = sockfd;
	packet_write(sockfd, "%s %s\n", prog, path);
	return 0;
}

#endif /* NO_IPV6 */

/*
 * Yeah, yeah, fixme. Need to pass in the heads etc.
 */
int git_connect(int fd[2], char *url, const char *prog)
{
	char command[1024];
	char *host, *path;
	char *colon;
	int pipefd[2][2];
	pid_t pid;
	enum protocol protocol;

	host = NULL;
	path = url;
	colon = strchr(url, ':');
	protocol = PROTO_LOCAL;
	if (colon) {
		*colon = 0;
		host = url;
		path = colon+1;
		protocol = PROTO_SSH;
		if (!memcmp(path, "//", 2)) {
			char *slash = strchr(path + 2, '/');
			if (slash) {
				int nr = slash - path - 2;
				memmove(path, path+2, nr);
				path[nr] = 0;
				protocol = get_protocol(url);
				host = path;
				path = slash;
			}
		}
	}

	if (protocol == PROTO_GIT)
		return git_tcp_connect(fd, prog, host, path);

	if (pipe(pipefd[0]) < 0 || pipe(pipefd[1]) < 0)
		die("unable to create pipe pair for communication");
	pid = fork();
	if (!pid) {
		snprintf(command, sizeof(command), "%s %s", prog,
			 sq_quote(path));
		dup2(pipefd[1][0], 0);
		dup2(pipefd[0][1], 1);
		close(pipefd[0][0]);
		close(pipefd[0][1]);
		close(pipefd[1][0]);
		close(pipefd[1][1]);
		if (protocol == PROTO_SSH) {
			const char *ssh, *ssh_basename;
			ssh = getenv("GIT_SSH");
			if (!ssh) ssh = "ssh";
			ssh_basename = strrchr(ssh, '/');
			if (!ssh_basename)
				ssh_basename = ssh;
			else
				ssh_basename++;
			execlp(ssh, ssh_basename, host, command, NULL);
		}
		else
			execlp("sh", "sh", "-c", command, NULL);
		die("exec failed");
	}		
	fd[0] = pipefd[0][0];
	fd[1] = pipefd[1][1];
	close(pipefd[0][1]);
	close(pipefd[1][0]);
	return pid;
}

int finish_connect(pid_t pid)
{
	int ret;

	for (;;) {
		ret = waitpid(pid, NULL, 0);
		if (!ret)
			break;
		if (errno != EINTR)
			break;
	}
	return ret;
}
Commit	Line	Data
f7192598	1	#include "cache.h"
41cb7488	2	#include "pkt-line.h"
b10d0ec7	3	#include "quote.h"
6abf5c0c	4	#include "refs.h"
f7192598	5	#include <sys/wait.h>
2386d658 LT	6	#include <sys/socket.h>
	7	#include <netinet/in.h>
	8	#include <arpa/inet.h>
	9	#include <netdb.h>
f7192598	10
d1c133f5 LT	11	/*
	12	* Read all the refs from the other end
	13	*/
1a7141ff JH	14	struct ref get_remote_heads(int in, struct ref list,
1a7141ff JH	15	int nr_match, char **match, int ignore_funny)
d1c133f5 LT	16	{
	17	*list = NULL;
	18	for (;;) {
	19	struct ref *ref;
	20	unsigned char old_sha1[20];
	21	static char buffer[1000];
	22	char *name;
	23	int len;
	24
	25	len = packet_read_line(in, buffer, sizeof(buffer));
	26	if (!len)
	27	break;
	28	if (buffer[len-1] == '\n')
	29	buffer[--len] = 0;
	30
	31	if (len < 42 \|\| get_sha1_hex(buffer, old_sha1) \|\| buffer[40] != ' ')
	32	die("protocol error: expected sha/ref, got '%s'", buffer);
	33	name = buffer + 41;
1a7141ff JH	34
	35	if (ignore_funny && 45 < len && !memcmp(name, "refs/", 5) &&
	36	check_ref_format(name + 5))
	37	continue;
	38
d1c133f5 LT	39	if (nr_match && !path_match(name, nr_match, match))
d1c133f5 LT	40	continue;
f88395ac	41	ref = xcalloc(1, sizeof(*ref) + len - 40);
d1c133f5	42	memcpy(ref->old_sha1, old_sha1, 20);
d1c133f5	43	memcpy(ref->name, buffer + 41, len - 40);
d1c133f5 LT	44	*list = ref;
	45	list = &ref->next;
	46	}
	47	return list;
	48	}
	49
41cb7488 LT	50	int get_ack(int fd, unsigned char *result_sha1)
	51	{
	52	static char line[1000];
	53	int len = packet_read_line(fd, line, sizeof(line));
	54
	55	if (!len)
	56	die("git-fetch-pack: expected ACK/NAK, got EOF");
	57	if (line[len-1] == '\n')
	58	line[--len] = 0;
	59	if (!strcmp(line, "NAK"))
	60	return 0;
	61	if (!strncmp(line, "ACK ", 3)) {
af2d3aa4	62	if (!get_sha1_hex(line+4, result_sha1))
41cb7488 LT	63	return 1;
	64	}
	65	die("git-fetch_pack: expected ACK/NAK, got '%s'", line);
	66	}
	67
013e7c7f LT	68	int path_match(const char path, int nr, char *match)
	69	{
	70	int i;
	71	int pathlen = strlen(path);
	72
	73	for (i = 0; i < nr; i++) {
	74	char *s = match[i];
	75	int len = strlen(s);
	76
	77	if (!len \|\| len > pathlen)
	78	continue;
	79	if (memcmp(path + pathlen - len, s, len))
	80	continue;
	81	if (pathlen > len && path[pathlen - len - 1] != '/')
	82	continue;
	83	*s = 0;
	84	return 1;
	85	}
	86	return 0;
	87	}
	88
f88395ac JH	89	struct refspec {
	90	char *src;
	91	char *dst;
ff27adf3	92	char force;
f88395ac JH	93	};
f88395ac JH	94
ff27adf3 JH	95	/*
	96	* A:B means fast forward remote B with local A.
	97	* +A:B means overwrite remote B with local A.
	98	* +A is a shorthand for +A:A.
	99	* A is a shorthand for A:A.
	100	*/
f88395ac JH	101	static struct refspec parse_ref_spec(int nr_refspec, char *refspec)
	102	{
	103	int i;
ff27adf3	104	struct refspec rs = xcalloc(sizeof(rs), (nr_refspec + 1));
f88395ac JH	105	for (i = 0; i < nr_refspec; i++) {
	106	char sp, dp, *ep;
	107	sp = refspec[i];
ff27adf3 JH	108	if (*sp == '+') {
	109	rs[i].force = 1;
	110	sp++;
	111	}
f88395ac JH	112	ep = strchr(sp, ':');
	113	if (ep) {
	114	dp = ep + 1;
	115	*ep = 0;
	116	}
	117	else
	118	dp = sp;
	119	rs[i].src = sp;
	120	rs[i].dst = dp;
	121	}
	122	rs[nr_refspec].src = rs[nr_refspec].dst = NULL;
	123	return rs;
	124	}
	125
	126	static int count_refspec_match(const char *pattern,
	127	struct ref *refs,
	128	struct ref **matched_ref)
	129	{
	130	int match;
	131	int patlen = strlen(pattern);
	132
	133	for (match = 0; refs; refs = refs->next) {
	134	char *name = refs->name;
	135	int namelen = strlen(name);
	136	if (namelen < patlen \|\|
	137	memcmp(name + namelen - patlen, pattern, patlen))
	138	continue;
	139	if (namelen != patlen && name[namelen - patlen - 1] != '/')
	140	continue;
	141	match++;
	142	*matched_ref = refs;
	143	}
	144	return match;
	145	}
	146
	147	static void link_dst_tail(struct ref ref, struct ref **tail)
	148	{
	149	**tail = ref;
	150	*tail = &ref->next;
	151	**tail = NULL;
	152	}
	153
15e02b37 JH	154	static struct ref try_explicit_object_name(const char name)
	155	{
	156	unsigned char sha1[20];
	157	struct ref *ref;
	158	int len;
	159	if (get_sha1(name, sha1))
	160	return NULL;
	161	len = strlen(name) + 1;
	162	ref = xcalloc(1, sizeof(*ref) + len);
	163	memcpy(ref->name, name, len);
	164	memcpy(ref->new_sha1, sha1, 20);
	165	return ref;
	166	}
	167
f88395ac JH	168	static int match_explicit_refs(struct ref src, struct ref dst,
	169	struct ref **dst_tail, struct refspec rs)
	170	{
	171	int i, errs;
	172	for (i = errs = 0; rs[i].src; i++) {
	173	struct ref matched_src, matched_dst;
	174
	175	matched_src = matched_dst = NULL;
	176	switch (count_refspec_match(rs[i].src, src, &matched_src)) {
	177	case 1:
	178	break;
	179	case 0:
15e02b37 JH	180	/* The source could be in the get_sha1() format
	181	* not a reference name.
	182	*/
	183	matched_src = try_explicit_object_name(rs[i].src);
	184	if (matched_src)
	185	break;
f88395ac	186	errs = 1;
4ec99bf0 TS	187	error("src refspec %s does not match any.",
4ec99bf0 TS	188	rs[i].src);
f88395ac JH	189	break;
	190	default:
	191	errs = 1;
	192	error("src refspec %s matches more than one.",
	193	rs[i].src);
	194	break;
	195	}
	196	switch (count_refspec_match(rs[i].dst, dst, &matched_dst)) {
	197	case 1:
	198	break;
	199	case 0:
	200	if (!memcmp(rs[i].dst, "refs/", 5)) {
	201	int len = strlen(rs[i].dst) + 1;
	202	matched_dst = xcalloc(1, sizeof(*dst) + len);
	203	memcpy(matched_dst->name, rs[i].dst, len);
	204	link_dst_tail(matched_dst, dst_tail);
	205	}
	206	else if (!strcmp(rs[i].src, rs[i].dst) &&
	207	matched_src) {
	208	/* pushing "master:master" when
	209	* remote does not have master yet.
	210	*/
4fa1604f	211	int len = strlen(matched_src->name) + 1;
f88395ac JH	212	matched_dst = xcalloc(1, sizeof(*dst) + len);
	213	memcpy(matched_dst->name, matched_src->name,
	214	len);
	215	link_dst_tail(matched_dst, dst_tail);
	216	}
	217	else {
	218	errs = 1;
	219	error("dst refspec %s does not match any "
	220	"existing ref on the remote and does "
	221	"not start with refs/.", rs[i].dst);
	222	}
	223	break;
	224	default:
	225	errs = 1;
	226	error("dst refspec %s matches more than one.",
	227	rs[i].dst);
	228	break;
	229	}
	230	if (errs)
	231	continue;
f88395ac JH	232	if (matched_dst->peer_ref) {
	233	errs = 1;
	234	error("dst ref %s receives from more than one src.",
	235	matched_dst->name);
	236	}
ff27adf3	237	else {
f88395ac	238	matched_dst->peer_ref = matched_src;
ff27adf3 JH	239	matched_dst->force = rs[i].force;
ff27adf3 JH	240	}
f88395ac JH	241	}
	242	return -errs;
	243	}
	244
	245	static struct ref find_ref_by_name(struct ref list, const char *name)
	246	{
	247	for ( ; list; list = list->next)
	248	if (!strcmp(list->name, name))
	249	return list;
	250	return NULL;
	251	}
	252
	253	int match_refs(struct ref src, struct ref dst, struct ref ***dst_tail,
	254	int nr_refspec, char **refspec, int all)
	255	{
	256	struct refspec *rs = parse_ref_spec(nr_refspec, refspec);
	257
	258	if (nr_refspec)
	259	return match_explicit_refs(src, dst, dst_tail, rs);
	260
	261	/* pick the remainder */
	262	for ( ; src; src = src->next) {
	263	struct ref *dst_peer;
	264	if (src->peer_ref)
	265	continue;
	266	dst_peer = find_ref_by_name(dst, src->name);
635d37af	267	if ((dst_peer && dst_peer->peer_ref) \|\| (!dst_peer && !all))
f88395ac JH	268	continue;
f88395ac JH	269	if (!dst_peer) {
f88395ac JH	270	/* Create a new one and link it */
	271	int len = strlen(src->name) + 1;
	272	dst_peer = xcalloc(1, sizeof(*dst_peer) + len);
	273	memcpy(dst_peer->name, src->name, len);
	274	memcpy(dst_peer->new_sha1, src->new_sha1, 20);
	275	link_dst_tail(dst_peer, dst_tail);
	276	}
	277	dst_peer->peer_ref = src;
	278	}
	279	return 0;
	280	}
	281
2386d658 LT	282	enum protocol {
	283	PROTO_LOCAL = 1,
	284	PROTO_SSH,
	285	PROTO_GIT,
	286	};
	287
	288	static enum protocol get_protocol(const char *name)
	289	{
	290	if (!strcmp(name, "ssh"))
	291	return PROTO_SSH;
	292	if (!strcmp(name, "git"))
	293	return PROTO_GIT;
c05186cc LT	294	if (!strcmp(name, "git+ssh"))
	295	return PROTO_SSH;
	296	if (!strcmp(name, "ssh+git"))
	297	return PROTO_SSH;
2386d658 LT	298	die("I don't handle protocol '%s'", name);
	299	}
	300
5ba88448 YH	301	#define STR_(s) # s
5ba88448 YH	302	#define STR(s) STR_(s)
2386d658	303
49744d63	304	#ifndef NO_IPV6
4c505f71	305
2386d658 LT	306	static int git_tcp_connect(int fd[2], const char prog, char host, char *path)
2386d658 LT	307	{
5ba88448 YH	308	int sockfd = -1;
	309	char colon, end;
	310	char *port = STR(DEFAULT_GIT_PORT);
	311	struct addrinfo hints, ai0, ai;
	312	int gai;
	313
	314	if (host[0] == '[') {
	315	end = strchr(host + 1, ']');
	316	if (end) {
	317	*end = 0;
	318	end++;
	319	host++;
	320	} else
	321	end = host;
	322	} else
	323	end = host;
	324	colon = strchr(end, ':');
	325
ce6f8e7e LT	326	if (colon) {
ce6f8e7e LT	327	*colon = 0;
5ba88448	328	port = colon + 1;
ce6f8e7e	329	}
5ba88448 YH	330
	331	memset(&hints, 0, sizeof(hints));
	332	hints.ai_socktype = SOCK_STREAM;
	333	hints.ai_protocol = IPPROTO_TCP;
	334
	335	gai = getaddrinfo(host, port, &hints, &ai);
	336	if (gai)
	337	die("Unable to look up %s (%s)", host, gai_strerror(gai));
	338
	339	for (ai0 = ai; ai; ai = ai->ai_next) {
	340	sockfd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
	341	if (sockfd < 0)
	342	continue;
	343	if (connect(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) {
	344	close(sockfd);
	345	sockfd = -1;
	346	continue;
2386d658	347	}
5ba88448	348	break;
2386d658 LT	349	}
2386d658 LT	350
5ba88448	351	freeaddrinfo(ai0);
2386d658	352
2386d658	353	if (sockfd < 0)
5ba88448 YH	354	die("unable to connect a socket (%s)", strerror(errno));
5ba88448 YH	355
2386d658 LT	356	fd[0] = sockfd;
	357	fd[1] = sockfd;
	358	packet_write(sockfd, "%s %s\n", prog, path);
	359	return 0;
	360	}
	361
49744d63	362	#else /* NO_IPV6 */
4c505f71 PA	363
	364	static int git_tcp_connect(int fd[2], const char prog, char host, char *path)
	365	{
	366	int sockfd = -1;
	367	char colon, end;
	368	char port = STR(DEFAULT_GIT_PORT), ep;
	369	struct hostent *he;
	370	struct sockaddr_in sa;
	371	char **ap;
	372	unsigned int nport;
	373
	374	if (host[0] == '[') {
	375	end = strchr(host + 1, ']');
	376	if (end) {
	377	*end = 0;
	378	end++;
	379	host++;
	380	} else
	381	end = host;
	382	} else
	383	end = host;
	384	colon = strchr(end, ':');
	385
	386	if (colon) {
	387	*colon = 0;
	388	port = colon + 1;
	389	}
	390
	391
	392	he = gethostbyname(host);
	393	if (!he)
	394	die("Unable to look up %s (%s)", host, hstrerror(h_errno));
	395	nport = strtoul(port, &ep, 10);
	396	if ( ep == port \|\| *ep ) {
	397	/* Not numeric */
	398	struct servent *se = getservbyname(port,"tcp");
	399	if ( !se )
	400	die("Unknown port %s\n", port);
	401	nport = se->s_port;
	402	}
	403
	404	for (ap = he->h_addr_list; *ap; ap++) {
	405	sockfd = socket(he->h_addrtype, SOCK_STREAM, 0);
	406	if (sockfd < 0)
	407	continue;
	408
	409	memset(&sa, 0, sizeof sa);
	410	sa.sin_family = he->h_addrtype;
6573faff	411	sa.sin_port = htons(nport);
4c505f71 PA	412	memcpy(&sa.sin_addr, ap, he->h_length);
	413
	414	if (connect(sockfd, (struct sockaddr *)&sa, sizeof sa) < 0) {
	415	close(sockfd);
	416	sockfd = -1;
	417	continue;
	418	}
	419	break;
	420	}
	421
	422	if (sockfd < 0)
	423	die("unable to connect a socket (%s)", strerror(errno));
	424
	425	fd[0] = sockfd;
	426	fd[1] = sockfd;
	427	packet_write(sockfd, "%s %s\n", prog, path);
	428	return 0;
	429	}
	430
49744d63	431	#endif /* NO_IPV6 */
4c505f71	432
f7192598 LT	433	/*
	434	* Yeah, yeah, fixme. Need to pass in the heads etc.
	435	*/
	436	int git_connect(int fd[2], char url, const char prog)
	437	{
	438	char command[1024];
2386d658	439	char host, path;
f7192598 LT	440	char *colon;
	441	int pipefd[2][2];
	442	pid_t pid;
2386d658	443	enum protocol protocol;
f7192598	444
f7192598 LT	445	host = NULL;
	446	path = url;
	447	colon = strchr(url, ':');
2386d658	448	protocol = PROTO_LOCAL;
f7192598 LT	449	if (colon) {
	450	*colon = 0;
	451	host = url;
	452	path = colon+1;
2386d658 LT	453	protocol = PROTO_SSH;
	454	if (!memcmp(path, "//", 2)) {
	455	char *slash = strchr(path + 2, '/');
	456	if (slash) {
	457	int nr = slash - path - 2;
	458	memmove(path, path+2, nr);
	459	path[nr] = 0;
	460	protocol = get_protocol(url);
	461	host = path;
	462	path = slash;
	463	}
	464	}
f7192598	465	}
2386d658 LT	466
	467	if (protocol == PROTO_GIT)
	468	return git_tcp_connect(fd, prog, host, path);
	469
f7192598 LT	470	if (pipe(pipefd[0]) < 0 \|\| pipe(pipefd[1]) < 0)
	471	die("unable to create pipe pair for communication");
	472	pid = fork();
	473	if (!pid) {
b10d0ec7 JH	474	snprintf(command, sizeof(command), "%s %s", prog,
b10d0ec7 JH	475	sq_quote(path));
f7192598 LT	476	dup2(pipefd[1][0], 0);
	477	dup2(pipefd[0][1], 1);
	478	close(pipefd[0][0]);
	479	close(pipefd[0][1]);
	480	close(pipefd[1][0]);
	481	close(pipefd[1][1]);
4852f723	482	if (protocol == PROTO_SSH) {
c7c81b3a JR	483	const char ssh, ssh_basename;
	484	ssh = getenv("GIT_SSH");
	485	if (!ssh) ssh = "ssh";
	486	ssh_basename = strrchr(ssh, '/');
4852f723 MS	487	if (!ssh_basename)
	488	ssh_basename = ssh;
	489	else
	490	ssh_basename++;
	491	execlp(ssh, ssh_basename, host, command, NULL);
	492	}
f7192598 LT	493	else
	494	execlp("sh", "sh", "-c", command, NULL);
	495	die("exec failed");
	496	}
	497	fd[0] = pipefd[0][0];
	498	fd[1] = pipefd[1][1];
	499	close(pipefd[0][1]);
	500	close(pipefd[1][0]);
	501	return pid;
	502	}
	503
	504	int finish_connect(pid_t pid)
	505	{
	506	int ret;
	507
	508	for (;;) {
	509	ret = waitpid(pid, NULL, 0);
	510	if (!ret)
	511	break;
	512	if (errno != EINTR)
	513	break;
	514	}
	515	return ret;
	516	}