Andrew's git - gitweb.git/blob - credential-cache.c

   1#include "cache.h"
   2#include "credential.h"
   3#include "string-list.h"
   4#include "parse-options.h"
   5#include "unix-socket.h"
   6#include "run-command.h"
   7
   8#define FLAG_SPAWN 0x1
   9#define FLAG_RELAY 0x2
  10
  11static int send_request(const char *socket, const struct strbuf *out)
  12{
  13        int got_data = 0;
  14        int fd = unix_stream_connect(socket);
  15
  16        if (fd < 0)
  17                return -1;
  18
  19        if (write_in_full(fd, out->buf, out->len) < 0)
  20                die_errno("unable to write to cache daemon");
  21        shutdown(fd, SHUT_WR);
  22
  23        while (1) {
  24                char in[1024];
  25                int r;
  26
  27                r = read_in_full(fd, in, sizeof(in));
  28                if (r == 0 || (r < 0 && errno == ECONNRESET))
  29                        break;
  30                if (r < 0)
  31                        die_errno("read error from cache daemon");
  32                write_or_die(1, in, r);
  33                got_data = 1;
  34        }
  35        close(fd);
  36        return got_data;
  37}
  38
  39static void spawn_daemon(const char *socket)
  40{
  41        struct child_process daemon = CHILD_PROCESS_INIT;
  42        const char *argv[] = { NULL, NULL, NULL };
  43        char buf[128];
  44        int r;
  45
  46        argv[0] = "git-credential-cache--daemon";
  47        argv[1] = socket;
  48        daemon.argv = argv;
  49        daemon.no_stdin = 1;
  50        daemon.out = -1;
  51
  52        if (start_command(&daemon))
  53                die_errno("unable to start cache daemon");
  54        r = read_in_full(daemon.out, buf, sizeof(buf));
  55        if (r < 0)
  56                die_errno("unable to read result code from cache daemon");
  57        if (r != 3 || memcmp(buf, "ok\n", 3))
  58                die("cache daemon did not start: %.*s", r, buf);
  59        close(daemon.out);
  60}
  61
  62static void do_cache(const char *socket, const char *action, int timeout,
  63                     int flags)
  64{
  65        struct strbuf buf = STRBUF_INIT;
  66
  67        strbuf_addf(&buf, "action=%s\n", action);
  68        strbuf_addf(&buf, "timeout=%d\n", timeout);
  69        if (flags & FLAG_RELAY) {
  70                if (strbuf_read(&buf, 0, 0) < 0)
  71                        die_errno("unable to relay credential");
  72        }
  73
  74        if (send_request(socket, &buf) < 0) {
  75                if (errno != ENOENT && errno != ECONNREFUSED)
  76                        die_errno("unable to connect to cache daemon");
  77                if (flags & FLAG_SPAWN) {
  78                        spawn_daemon(socket);
  79                        if (send_request(socket, &buf) < 0)
  80                                die_errno("unable to connect to cache daemon");
  81                }
  82        }
  83        strbuf_release(&buf);
  84}
  85
  86static char *get_socket_path(void)
  87{
  88        struct stat sb;
  89        char *old_dir, *socket;
  90        old_dir = expand_user_path("~/.git-credential-cache", 0);
  91        if (old_dir && !stat(old_dir, &sb) && S_ISDIR(sb.st_mode))
  92                socket = xstrfmt("%s/socket", old_dir);
  93        else
  94                socket = xdg_cache_home("credential/socket");
  95        free(old_dir);
  96        return socket;
  97}
  98
  99int cmd_main(int argc, const char **argv)
 100{
 101        char *socket_path = NULL;
 102        int timeout = 900;
 103        const char *op;
 104        const char * const usage[] = {
 105                "git credential-cache [<options>] <action>",
 106                NULL
 107        };
 108        struct option options[] = {
 109                OPT_INTEGER(0, "timeout", &timeout,
 110                            "number of seconds to cache credentials"),
 111                OPT_STRING(0, "socket", &socket_path, "path",
 112                           "path of cache-daemon socket"),
 113                OPT_END()
 114        };
 115
 116        argc = parse_options(argc, argv, NULL, options, usage, 0);
 117        if (!argc)
 118                usage_with_options(usage, options);
 119        op = argv[0];
 120
 121        if (!socket_path)
 122                socket_path = get_socket_path();
 123        if (!socket_path)
 124                die("unable to find a suitable socket path; use --socket");
 125
 126        if (!strcmp(op, "exit"))
 127                do_cache(socket_path, op, timeout, 0);
 128        else if (!strcmp(op, "get") || !strcmp(op, "erase"))
 129                do_cache(socket_path, op, timeout, FLAG_RELAY);
 130        else if (!strcmp(op, "store"))
 131                do_cache(socket_path, op, timeout, FLAG_RELAY|FLAG_SPAWN);
 132        else
 133                ; /* ignore unknown operation */
 134
 135        return 0;
 136}