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-rw-r--r--builtin/credential-cache.c183
1 files changed, 183 insertions, 0 deletions
diff --git a/builtin/credential-cache.c b/builtin/credential-cache.c
new file mode 100644
index 0000000..78c02ad
--- /dev/null
+++ b/builtin/credential-cache.c
@@ -0,0 +1,183 @@
+#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 */