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

#include "builtin.h"
#include "gettext.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	1	#include "builtin.h"
f394e093	2	#include "gettext.h"
b5dd96b7 JK	3	#include "parse-options.h"
	4
	5	#ifndef NO_UNIX_SOCKETS
	6
e2770979 JK	7	#include "credential.h"
e2770979 JK	8	#include "string-list.h"
e2770979 JK	9	#include "unix-socket.h"
	10	#include "run-command.h"
	11
	12	#define FLAG_SPAWN 0x1
	13	#define FLAG_RELAY 0x2
	14
245670cd CMAB	15	#ifdef GIT_WINDOWS_NATIVE
	16
	17	static int connection_closed(int error)
	18	{
	19	return (error == EINVAL);
	20	}
	21
	22	static int connection_fatally_broken(int error)
	23	{
	24	return (error != ENOENT) && (error != ENETDOWN);
	25	}
	26
	27	#else
	28
	29	static int connection_closed(int error)
	30	{
	31	return (error == ECONNRESET);
	32	}
	33
	34	static int connection_fatally_broken(int error)
	35	{
	36	return (error != ENOENT) && (error != ECONNREFUSED);
	37	}
	38
	39	#endif
	40
e2770979 JK	41	static int send_request(const char socket, const struct strbuf out)
	42	{
	43	int got_data = 0;
77e522ca	44	int fd = unix_stream_connect(socket, 0);
e2770979 JK	45
	46	if (fd < 0)
	47	return -1;
	48
	49	if (write_in_full(fd, out->buf, out->len) < 0)
	50	die_errno("unable to write to cache daemon");
	51	shutdown(fd, SHUT_WR);
	52
	53	while (1) {
	54	char in[1024];
	55	int r;
	56
	57	r = read_in_full(fd, in, sizeof(in));
245670cd	58	if (r == 0 \|\| (r < 0 && connection_closed(errno)))
e2770979 JK	59	break;
	60	if (r < 0)
	61	die_errno("read error from cache daemon");
	62	write_or_die(1, in, r);
	63	got_data = 1;
	64	}
9c60d9fa	65	close(fd);
e2770979 JK	66	return got_data;
	67	}
	68
	69	static void spawn_daemon(const char *socket)
	70	{
d3180279	71	struct child_process daemon = CHILD_PROCESS_INIT;
e2770979 JK	72	char buf[128];
	73	int r;
	74
c0e190c1 JH	75	strvec_pushl(&daemon.args,
	76	"credential-cache--daemon", socket,
	77	NULL);
	78	daemon.git_cmd = 1;
e2770979 JK	79	daemon.no_stdin = 1;
	80	daemon.out = -1;
	81
	82	if (start_command(&daemon))
	83	die_errno("unable to start cache daemon");
	84	r = read_in_full(daemon.out, buf, sizeof(buf));
	85	if (r < 0)
	86	die_errno("unable to read result code from cache daemon");
	87	if (r != 3 \|\| memcmp(buf, "ok\n", 3))
	88	die("cache daemon did not start: %.*s", r, buf);
	89	close(daemon.out);
	90	}
	91
	92	static void do_cache(const char socket, const char action, int timeout,
	93	int flags)
	94	{
	95	struct strbuf buf = STRBUF_INIT;
	96
	97	strbuf_addf(&buf, "action=%s\n", action);
	98	strbuf_addf(&buf, "timeout=%d\n", timeout);
	99	if (flags & FLAG_RELAY) {
	100	if (strbuf_read(&buf, 0, 0) < 0)
	101	die_errno("unable to relay credential");
	102	}
	103
8ec6c8d7	104	if (send_request(socket, &buf) < 0) {
245670cd	105	if (connection_fatally_broken(errno))
98c2924c	106	die_errno("unable to connect to cache daemon");
8ec6c8d7 JK	107	if (flags & FLAG_SPAWN) {
	108	spawn_daemon(socket);
	109	if (send_request(socket, &buf) < 0)
	110	die_errno("unable to connect to cache daemon");
	111	}
e2770979 JK	112	}
	113	strbuf_release(&buf);
	114	}
	115
60759baa DL	116	static char *get_socket_path(void)
	117	{
	118	struct stat sb;
	119	char old_dir, socket;
a03b097d	120	old_dir = interpolate_path("~/.git-credential-cache", 0);
60759baa DL	121	if (old_dir && !stat(old_dir, &sb) && S_ISDIR(sb.st_mode))
	122	socket = xstrfmt("%s/socket", old_dir);
	123	else
	124	socket = xdg_cache_home("credential/socket");
	125	free(old_dir);
	126	return socket;
	127	}
	128
b5dd96b7	129	int cmd_credential_cache(int argc, const char *argv, const char prefix)
e2770979 JK	130	{
	131	char *socket_path = NULL;
	132	int timeout = 900;
	133	const char *op;
	134	const char * const usage[] = {
d96a0313	135	"git credential-cache [<options>] <action>",
e2770979 JK	136	NULL
	137	};
	138	struct option options[] = {
	139	OPT_INTEGER(0, "timeout", &timeout,
	140	"number of seconds to cache credentials"),
	141	OPT_STRING(0, "socket", &socket_path, "path",
	142	"path of cache-daemon socket"),
	143	OPT_END()
	144	};
	145
b5dd96b7	146	argc = parse_options(argc, argv, prefix, options, usage, 0);
e2770979 JK	147	if (!argc)
	148	usage_with_options(usage, options);
	149	op = argv[0];
	150
	151	if (!socket_path)
60759baa	152	socket_path = get_socket_path();
e2770979 JK	153	if (!socket_path)
	154	die("unable to find a suitable socket path; use --socket");
	155
	156	if (!strcmp(op, "exit"))
	157	do_cache(socket_path, op, timeout, 0);
	158	else if (!strcmp(op, "get") \|\| !strcmp(op, "erase"))
	159	do_cache(socket_path, op, timeout, FLAG_RELAY);
	160	else if (!strcmp(op, "store"))
	161	do_cache(socket_path, op, timeout, FLAG_RELAY\|FLAG_SPAWN);
	162	else
	163	; /* ignore unknown operation */
	164
	165	return 0;
	166	}
b5dd96b7 JK	167
	168	#else
	169
	170	int cmd_credential_cache(int argc, const char *argv, const char prefix)
	171	{
	172	const char * const usage[] = {
	173	"git credential-cache [options] <action>",
	174	"",
	175	"credential-cache is disabled in this build of Git",
	176	NULL
	177	};
	178	struct option options[] = { OPT_END() };
	179
	180	argc = parse_options(argc, argv, prefix, options, usage, 0);
	181	die(_("credential-cache unavailable; no unix socket support"));
	182	}
	183
	184	#endif /* NO_UNIX_SOCKETS */