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authorJeff King <peff@peff.net>2011-12-10 10:34:14 (GMT)
committerJunio C Hamano <gitster@pobox.com>2011-12-12 07:16:25 (GMT)
commite2770979fec968a25ac21e34f9082bc17a71a780 (patch)
tree5ae5a950fec8c52cab6a0ee21f48d0912bafcafd /credential-cache.c
parenta6fc9fd3f4b42cd97b5262026e18bd451c28ee3c (diff)
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credentials: add "cache" helper
If you access repositories over smart-http using http authentication, then it can be annoying to have git ask you for your password repeatedly. We cache credentials in memory, of course, but git is composed of many small programs. Having to input your password for each one can be frustrating. This patch introduces a credential helper that will cache passwords in memory for a short period of time. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'credential-cache.c')
-rw-r--r--credential-cache.c120
1 files changed, 120 insertions, 0 deletions
diff --git a/credential-cache.c b/credential-cache.c
new file mode 100644
index 0000000..dc98372
--- /dev/null
+++ b/credential-cache.c
@@ -0,0 +1,120 @@
+#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)
+ break;
+ if (r < 0)
+ die_errno("read error from cache daemon");
+ write_or_die(1, in, r);
+ got_data = 1;
+ }
+ return got_data;
+}
+
+static void spawn_daemon(const char *socket)
+{
+ struct child_process daemon;
+ const char *argv[] = { NULL, NULL, NULL };
+ char buf[128];
+ int r;
+
+ memset(&daemon, 0, sizeof(daemon));
+ 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))
+ return;
+ if (flags & FLAG_SPAWN) {
+ spawn_daemon(socket);
+ send_request(socket, &buf);
+ }
+ strbuf_release(&buf);
+}
+
+int 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 = expand_user_path("~/.git-credential-cache/socket");
+ 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;
+}