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https://github.com/git/git
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8ec6c8d795
Originally, this code remained relatively silent when we failed to connect to the cache. The idea was that it was simply a cache, and we didn't want to bother the user with temporary failures (the worst case is that we would simply ask their password again). However, if you have a configuration failure or other problem, it is helpful for the daemon to report those problems. Git will happily ignore the failed error code, but the extra information to stderr can help the user diagnose the problem. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
124 lines
2.9 KiB
C
124 lines
2.9 KiB
C
#include "cache.h"
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#include "credential.h"
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#include "string-list.h"
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#include "parse-options.h"
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#include "unix-socket.h"
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#include "run-command.h"
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#define FLAG_SPAWN 0x1
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#define FLAG_RELAY 0x2
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static int send_request(const char *socket, const struct strbuf *out)
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{
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int got_data = 0;
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int fd = unix_stream_connect(socket);
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if (fd < 0)
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return -1;
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if (write_in_full(fd, out->buf, out->len) < 0)
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die_errno("unable to write to cache daemon");
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shutdown(fd, SHUT_WR);
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while (1) {
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char in[1024];
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int r;
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r = read_in_full(fd, in, sizeof(in));
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if (r == 0)
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break;
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if (r < 0)
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die_errno("read error from cache daemon");
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write_or_die(1, in, r);
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got_data = 1;
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}
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return got_data;
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}
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static void spawn_daemon(const char *socket)
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{
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struct child_process daemon;
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const char *argv[] = { NULL, NULL, NULL };
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char buf[128];
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int r;
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memset(&daemon, 0, sizeof(daemon));
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argv[0] = "git-credential-cache--daemon";
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argv[1] = socket;
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daemon.argv = argv;
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daemon.no_stdin = 1;
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daemon.out = -1;
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if (start_command(&daemon))
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die_errno("unable to start cache daemon");
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r = read_in_full(daemon.out, buf, sizeof(buf));
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if (r < 0)
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die_errno("unable to read result code from cache daemon");
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if (r != 3 || memcmp(buf, "ok\n", 3))
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die("cache daemon did not start: %.*s", r, buf);
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close(daemon.out);
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}
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static void do_cache(const char *socket, const char *action, int timeout,
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int flags)
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{
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struct strbuf buf = STRBUF_INIT;
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strbuf_addf(&buf, "action=%s\n", action);
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strbuf_addf(&buf, "timeout=%d\n", timeout);
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if (flags & FLAG_RELAY) {
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if (strbuf_read(&buf, 0, 0) < 0)
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die_errno("unable to relay credential");
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}
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if (send_request(socket, &buf) < 0) {
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if (errno != ENOENT)
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die_errno("unable to connect to cache daemon");
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if (flags & FLAG_SPAWN) {
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spawn_daemon(socket);
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if (send_request(socket, &buf) < 0)
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die_errno("unable to connect to cache daemon");
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}
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}
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strbuf_release(&buf);
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}
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int main(int argc, const char **argv)
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{
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char *socket_path = NULL;
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int timeout = 900;
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const char *op;
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const char * const usage[] = {
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"git credential-cache [options] <action>",
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NULL
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};
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struct option options[] = {
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OPT_INTEGER(0, "timeout", &timeout,
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"number of seconds to cache credentials"),
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OPT_STRING(0, "socket", &socket_path, "path",
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"path of cache-daemon socket"),
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OPT_END()
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};
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argc = parse_options(argc, argv, NULL, options, usage, 0);
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if (!argc)
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usage_with_options(usage, options);
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op = argv[0];
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if (!socket_path)
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socket_path = expand_user_path("~/.git-credential-cache/socket");
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if (!socket_path)
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die("unable to find a suitable socket path; use --socket");
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if (!strcmp(op, "exit"))
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do_cache(socket_path, op, timeout, 0);
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else if (!strcmp(op, "get") || !strcmp(op, "erase"))
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do_cache(socket_path, op, timeout, FLAG_RELAY);
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else if (!strcmp(op, "store"))
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do_cache(socket_path, op, timeout, FLAG_RELAY|FLAG_SPAWN);
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else
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; /* ignore unknown operation */
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return 0;
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}
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