[thirdparty/git.git] / builtin / credential-cache.c

#include "builtin.h"
#include "parse-options.h"

#ifndef NO_UNIX_SOCKETS

#include "credential.h"
#include "string-list.h"
#include "unix-socket.h"
#include "run-command.h"

#define FLAG_SPAWN 0x1
#define FLAG_RELAY 0x2

#ifdef GIT_WINDOWS_NATIVE

static int connection_closed(int error)
{
	return (error == EINVAL);
}

static int connection_fatally_broken(int error)
{
	return (error != ENOENT) && (error != ENETDOWN);
}

#else

static int connection_closed(int error)
{
	return (error == ECONNRESET);
}

static int connection_fatally_broken(int error)
{
	return (error != ENOENT) && (error != ECONNREFUSED);
}

#endif

static int send_request(const char *socket, const struct strbuf *out)
{
	int got_data = 0;
	int fd = unix_stream_connect(socket, 0);

	if (fd < 0)
		return -1;

	if (write_in_full(fd, out->buf, out->len) < 0)
		die_errno("unable to write to cache daemon");
	shutdown(fd, SHUT_WR);

	while (1) {
		char in[1024];
		int r;

		r = read_in_full(fd, in, sizeof(in));
		if (r == 0 || (r < 0 && connection_closed(errno)))
			break;
		if (r < 0)
			die_errno("read error from cache daemon");
		write_or_die(1, in, r);
		got_data = 1;
	}
	close(fd);
	return got_data;
}

static void spawn_daemon(const char *socket)
{
	struct child_process daemon = CHILD_PROCESS_INIT;
	char buf[128];
	int r;

	strvec_pushl(&daemon.args,
		     "credential-cache--daemon", socket,
		     NULL);
	daemon.git_cmd = 1;
	daemon.no_stdin = 1;
	daemon.out = -1;

	if (start_command(&daemon))
		die_errno("unable to start cache daemon");
	r = read_in_full(daemon.out, buf, sizeof(buf));
	if (r < 0)
		die_errno("unable to read result code from cache daemon");
	if (r != 3 || memcmp(buf, "ok\n", 3))
		die("cache daemon did not start: %.*s", r, buf);
	close(daemon.out);
}

static void do_cache(const char *socket, const char *action, int timeout,
		     int flags)
{
	struct strbuf buf = STRBUF_INIT;

	strbuf_addf(&buf, "action=%s\n", action);
	strbuf_addf(&buf, "timeout=%d\n", timeout);
	if (flags & FLAG_RELAY) {
		if (strbuf_read(&buf, 0, 0) < 0)
			die_errno("unable to relay credential");
	}

	if (send_request(socket, &buf) < 0) {
		if (connection_fatally_broken(errno))
			die_errno("unable to connect to cache daemon");
		if (flags & FLAG_SPAWN) {
			spawn_daemon(socket);
			if (send_request(socket, &buf) < 0)
				die_errno("unable to connect to cache daemon");
		}
	}
	strbuf_release(&buf);
}

static char *get_socket_path(void)
{
	struct stat sb;
	char *old_dir, *socket;
	old_dir = interpolate_path("~/.git-credential-cache", 0);
	if (old_dir && !stat(old_dir, &sb) && S_ISDIR(sb.st_mode))
		socket = xstrfmt("%s/socket", old_dir);
	else
		socket = xdg_cache_home("credential/socket");
	free(old_dir);
	return socket;
}

int cmd_credential_cache(int argc, const char **argv, const char *prefix)
{
	char *socket_path = NULL;
	int timeout = 900;
	const char *op;
	const char * const usage[] = {
		"git credential-cache [<options>] <action>",
		NULL
	};
	struct option options[] = {
		OPT_INTEGER(0, "timeout", &timeout,
			    "number of seconds to cache credentials"),
		OPT_STRING(0, "socket", &socket_path, "path",
			   "path of cache-daemon socket"),
		OPT_END()
	};

	argc = parse_options(argc, argv, prefix, options, usage, 0);
	if (!argc)
		usage_with_options(usage, options);
	op = argv[0];

	if (!socket_path)
		socket_path = get_socket_path();
	if (!socket_path)
		die("unable to find a suitable socket path; use --socket");

	if (!strcmp(op, "exit"))
		do_cache(socket_path, op, timeout, 0);
	else if (!strcmp(op, "get") || !strcmp(op, "erase"))
		do_cache(socket_path, op, timeout, FLAG_RELAY);
	else if (!strcmp(op, "store"))
		do_cache(socket_path, op, timeout, FLAG_RELAY|FLAG_SPAWN);
	else
		; /* ignore unknown operation */

	return 0;
}

#else

int cmd_credential_cache(int argc, const char **argv, const char *prefix)
{
	const char * const usage[] = {
		"git credential-cache [options] <action>",
		"",
		"credential-cache is disabled in this build of Git",
		NULL
	};
	struct option options[] = { OPT_END() };

	argc = parse_options(argc, argv, prefix, options, usage, 0);
	die(_("credential-cache unavailable; no unix socket support"));
}

#endif /* NO_UNIX_SOCKETS */
Commit	Line	Data
b5dd96b7 JK	1	#include "builtin.h"
	2	#include "parse-options.h"
	3
	4	#ifndef NO_UNIX_SOCKETS
	5
e2770979 JK	6	#include "credential.h"
e2770979 JK	7	#include "string-list.h"
e2770979 JK	8	#include "unix-socket.h"
	9	#include "run-command.h"
	10
	11	#define FLAG_SPAWN 0x1
	12	#define FLAG_RELAY 0x2
	13
245670cd CMAB	14	#ifdef GIT_WINDOWS_NATIVE
	15
	16	static int connection_closed(int error)
	17	{
	18	return (error == EINVAL);
	19	}
	20
	21	static int connection_fatally_broken(int error)
	22	{
	23	return (error != ENOENT) && (error != ENETDOWN);
	24	}
	25
	26	#else
	27
	28	static int connection_closed(int error)
	29	{
	30	return (error == ECONNRESET);
	31	}
	32
	33	static int connection_fatally_broken(int error)
	34	{
	35	return (error != ENOENT) && (error != ECONNREFUSED);
	36	}
	37
	38	#endif
	39
e2770979 JK	40	static int send_request(const char socket, const struct strbuf out)
	41	{
	42	int got_data = 0;
77e522ca	43	int fd = unix_stream_connect(socket, 0);
e2770979 JK	44
	45	if (fd < 0)
	46	return -1;
	47
	48	if (write_in_full(fd, out->buf, out->len) < 0)
	49	die_errno("unable to write to cache daemon");
	50	shutdown(fd, SHUT_WR);
	51
	52	while (1) {
	53	char in[1024];
	54	int r;
	55
	56	r = read_in_full(fd, in, sizeof(in));
245670cd	57	if (r == 0 \|\| (r < 0 && connection_closed(errno)))
e2770979 JK	58	break;
	59	if (r < 0)
	60	die_errno("read error from cache daemon");
	61	write_or_die(1, in, r);
	62	got_data = 1;
	63	}
9c60d9fa	64	close(fd);
e2770979 JK	65	return got_data;
	66	}
	67
	68	static void spawn_daemon(const char *socket)
	69	{
d3180279	70	struct child_process daemon = CHILD_PROCESS_INIT;
e2770979 JK	71	char buf[128];
	72	int r;
	73
c0e190c1 JH	74	strvec_pushl(&daemon.args,
	75	"credential-cache--daemon", socket,
	76	NULL);
	77	daemon.git_cmd = 1;
e2770979 JK	78	daemon.no_stdin = 1;
	79	daemon.out = -1;
	80
	81	if (start_command(&daemon))
	82	die_errno("unable to start cache daemon");
	83	r = read_in_full(daemon.out, buf, sizeof(buf));
	84	if (r < 0)
	85	die_errno("unable to read result code from cache daemon");
	86	if (r != 3 \|\| memcmp(buf, "ok\n", 3))
	87	die("cache daemon did not start: %.*s", r, buf);
	88	close(daemon.out);
	89	}
	90
	91	static void do_cache(const char socket, const char action, int timeout,
	92	int flags)
	93	{
	94	struct strbuf buf = STRBUF_INIT;
	95
	96	strbuf_addf(&buf, "action=%s\n", action);
	97	strbuf_addf(&buf, "timeout=%d\n", timeout);
	98	if (flags & FLAG_RELAY) {
	99	if (strbuf_read(&buf, 0, 0) < 0)
	100	die_errno("unable to relay credential");
	101	}
	102
8ec6c8d7	103	if (send_request(socket, &buf) < 0) {
245670cd	104	if (connection_fatally_broken(errno))
98c2924c	105	die_errno("unable to connect to cache daemon");
8ec6c8d7 JK	106	if (flags & FLAG_SPAWN) {
	107	spawn_daemon(socket);
	108	if (send_request(socket, &buf) < 0)
	109	die_errno("unable to connect to cache daemon");
	110	}
e2770979 JK	111	}
	112	strbuf_release(&buf);
	113	}
	114
60759baa DL	115	static char *get_socket_path(void)
	116	{
	117	struct stat sb;
	118	char old_dir, socket;
a03b097d	119	old_dir = interpolate_path("~/.git-credential-cache", 0);
60759baa DL	120	if (old_dir && !stat(old_dir, &sb) && S_ISDIR(sb.st_mode))
	121	socket = xstrfmt("%s/socket", old_dir);
	122	else
	123	socket = xdg_cache_home("credential/socket");
	124	free(old_dir);
	125	return socket;
	126	}
	127
b5dd96b7	128	int cmd_credential_cache(int argc, const char *argv, const char prefix)
e2770979 JK	129	{
	130	char *socket_path = NULL;
	131	int timeout = 900;
	132	const char *op;
	133	const char * const usage[] = {
d96a0313	134	"git credential-cache [<options>] <action>",
e2770979 JK	135	NULL
	136	};
	137	struct option options[] = {
	138	OPT_INTEGER(0, "timeout", &timeout,
	139	"number of seconds to cache credentials"),
	140	OPT_STRING(0, "socket", &socket_path, "path",
	141	"path of cache-daemon socket"),
	142	OPT_END()
	143	};
	144
b5dd96b7	145	argc = parse_options(argc, argv, prefix, options, usage, 0);
e2770979 JK	146	if (!argc)
	147	usage_with_options(usage, options);
	148	op = argv[0];
	149
	150	if (!socket_path)
60759baa	151	socket_path = get_socket_path();
e2770979 JK	152	if (!socket_path)
	153	die("unable to find a suitable socket path; use --socket");
	154
	155	if (!strcmp(op, "exit"))
	156	do_cache(socket_path, op, timeout, 0);
	157	else if (!strcmp(op, "get") \|\| !strcmp(op, "erase"))
	158	do_cache(socket_path, op, timeout, FLAG_RELAY);
	159	else if (!strcmp(op, "store"))
	160	do_cache(socket_path, op, timeout, FLAG_RELAY\|FLAG_SPAWN);
	161	else
	162	; /* ignore unknown operation */
	163
	164	return 0;
	165	}
b5dd96b7 JK	166
	167	#else
	168
	169	int cmd_credential_cache(int argc, const char *argv, const char prefix)
	170	{
	171	const char * const usage[] = {
	172	"git credential-cache [options] <action>",
	173	"",
	174	"credential-cache is disabled in this build of Git",
	175	NULL
	176	};
	177	struct option options[] = { OPT_END() };
	178
	179	argc = parse_options(argc, argv, prefix, options, usage, 0);
	180	die(_("credential-cache unavailable; no unix socket support"));
	181	}
	182
	183	#endif /* NO_UNIX_SOCKETS */