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#include "builtin.h"
#include "gettext.h"
#include "parse-options.h"
#include "path.h"
#include "strbuf.h"
#include "write-or-die.h"
#ifndef NO_UNIX_SOCKETS
#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 (!have_unix_sockets())
die(_("credential-cache unavailable; no unix socket support"));
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 */
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