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3e2ed6c0bed2510e5c04db0c3c837391b26e0950 blob 3316 bytes (raw)

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

#define FLAG_SPAWN 0x1
#define FLAG_RELAY 0x2

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

	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 && errno == ECONNRESET))
			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;
	const char *argv[] = { NULL, NULL, NULL };
	char buf[128];
	int r;

	argv[0] = "git-credential-cache--daemon";
	argv[1] = socket;
	daemon.argv = argv;
	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 (errno != ENOENT && errno != ECONNREFUSED)
			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 = expand_user_path(USER_GITCREDENTIAL_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_main(int argc, const char **argv)
{
	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, NULL, 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;
}
debug log:

solving 3e2ed6c0be ...
found 3e2ed6c0be in https://public-inbox.org/git/fa539c75b29f0ba5433a52bec5c7679476e15e8b.1564876327.git.gitgitgadget@gmail.com/ ||
	https://public-inbox.org/git/63e7e7794ee2afed1b57fe7585ef6e7af9cf8391.1566913575.git.gitgitgadget@gmail.com/
found 1cccc3a0b9 in git.git.git
preparing index
index prepared:
100644 1cccc3a0b9cfb2a14e9c87d5afc29234fa62adc4	credential-cache.c

applying [1/2] https://public-inbox.org/git/fa539c75b29f0ba5433a52bec5c7679476e15e8b.1564876327.git.gitgitgadget@gmail.com/
diff --git a/credential-cache.c b/credential-cache.c
index 1cccc3a0b9..3e2ed6c0be 100644

Checking patch credential-cache.c...
Applied patch credential-cache.c cleanly.

skipping https://public-inbox.org/git/63e7e7794ee2afed1b57fe7585ef6e7af9cf8391.1566913575.git.gitgitgadget@gmail.com/ for 3e2ed6c0be
index at:
100644 3e2ed6c0bed2510e5c04db0c3c837391b26e0950	credential-cache.c

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