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)
  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        return got_data;
  36}
  37
  38static void spawn_daemon(const char *socket)
  39{
  40        struct child_process daemon = CHILD_PROCESS_INIT;
  41        const char *argv[] = { NULL, NULL, NULL };
  42        char buf[128];
  43        int r;
  44
  45        argv[0] = "git-credential-cache--daemon";
  46        argv[1] = socket;
  47        daemon.argv = argv;
  48        daemon.no_stdin = 1;
  49        daemon.out = -1;
  50
  51        if (start_command(&daemon))
  52                die_errno("unable to start cache daemon");
  53        r = read_in_full(daemon.out, buf, sizeof(buf));
  54        if (r < 0)
  55                die_errno("unable to read result code from cache daemon");
  56        if (r != 3 || memcmp(buf, "ok\n", 3))
  57                die("cache daemon did not start: %.*s", r, buf);
  58        close(daemon.out);
  59}
  60
  61static void do_cache(const char *socket, const char *action, int timeout,
  62                     int flags)
  63{
  64        struct strbuf buf = STRBUF_INIT;
  65
  66        strbuf_addf(&buf, "action=%s\n", action);
  67        strbuf_addf(&buf, "timeout=%d\n", timeout);
  68        if (flags & FLAG_RELAY) {
  69                if (strbuf_read(&buf, 0, 0) < 0)
  70                        die_errno("unable to relay credential");
  71        }
  72
  73        if (send_request(socket, &buf) < 0) {
  74                if (errno != ENOENT && errno != ECONNREFUSED)
  75                        die_errno("unable to connect to cache daemon");
  76                if (flags & FLAG_SPAWN) {
  77                        spawn_daemon(socket);
  78                        if (send_request(socket, &buf) < 0)
  79                                die_errno("unable to connect to cache daemon");
  80                }
  81        }
  82        strbuf_release(&buf);
  83}
  84
  85int main(int argc, const char **argv)
  86{
  87        char *socket_path = NULL;
  88        int timeout = 900;
  89        const char *op;
  90        const char * const usage[] = {
  91                "git credential-cache [options] <action>",
  92                NULL
  93        };
  94        struct option options[] = {
  95                OPT_INTEGER(0, "timeout", &timeout,
  96                            "number of seconds to cache credentials"),
  97                OPT_STRING(0, "socket", &socket_path, "path",
  98                           "path of cache-daemon socket"),
  99                OPT_END()
 100        };
 101
 102        argc = parse_options(argc, argv, NULL, options, usage, 0);
 103        if (!argc)
 104                usage_with_options(usage, options);
 105        op = argv[0];
 106
 107        if (!socket_path)
 108                socket_path = expand_user_path("~/.git-credential-cache/socket");
 109        if (!socket_path)
 110                die("unable to find a suitable socket path; use --socket");
 111
 112        if (!strcmp(op, "exit"))
 113                do_cache(socket_path, op, timeout, 0);
 114        else if (!strcmp(op, "get") || !strcmp(op, "erase"))
 115                do_cache(socket_path, op, timeout, FLAG_RELAY);
 116        else if (!strcmp(op, "store"))
 117                do_cache(socket_path, op, timeout, FLAG_RELAY|FLAG_SPAWN);
 118        else
 119                ; /* ignore unknown operation */
 120
 121        return 0;
 122}