git-1.8.3/0000750001053700236030000000000012200247204010706 5ustar alecwhd-3git-1.8.3/credential-cache--daemon.c0000440001053700236030000001357112147736127015572 0ustar alecwhd-3#include "cache.h" #include "credential.h" #include "unix-socket.h" #include "sigchain.h" static const char *socket_path; static void cleanup_socket(void) { if (socket_path) unlink(socket_path); } static void cleanup_socket_on_signal(int sig) { cleanup_socket(); sigchain_pop(sig); raise(sig); } struct credential_cache_entry { struct credential item; unsigned long expiration; }; static struct credential_cache_entry *entries; static int entries_nr; static int entries_alloc; static void cache_credential(struct credential *c, int timeout) { struct credential_cache_entry *e; ALLOC_GROW(entries, entries_nr + 1, entries_alloc); e = &entries[entries_nr++]; /* take ownership of pointers */ memcpy(&e->item, c, sizeof(*c)); memset(c, 0, sizeof(*c)); e->expiration = time(NULL) + timeout; } static struct credential_cache_entry *lookup_credential(const struct credential *c) { int i; for (i = 0; i < entries_nr; i++) { struct credential *e = &entries[i].item; if (credential_match(c, e)) return &entries[i]; } return NULL; } static void remove_credential(const struct credential *c) { struct credential_cache_entry *e; e = lookup_credential(c); if (e) e->expiration = 0; } static int check_expirations(void) { static unsigned long wait_for_entry_until; int i = 0; unsigned long now = time(NULL); unsigned long next = (unsigned long)-1; /* * Initially give the client 30 seconds to actually contact us * and store a credential before we decide there's no point in * keeping the daemon around. */ if (!wait_for_entry_until) wait_for_entry_until = now + 30; while (i < entries_nr) { if (entries[i].expiration <= now) { entries_nr--; credential_clear(&entries[i].item); if (i != entries_nr) memcpy(&entries[i], &entries[entries_nr], sizeof(*entries)); /* * Stick around 30 seconds in case a new credential * shows up (e.g., because we just removed a failed * one, and we will soon get the correct one). */ wait_for_entry_until = now + 30; } else { if (entries[i].expiration < next) next = entries[i].expiration; i++; } } if (!entries_nr) { if (wait_for_entry_until <= now) return 0; next = wait_for_entry_until; } return next - now; } static int read_request(FILE *fh, struct credential *c, struct strbuf *action, int *timeout) { static struct strbuf item = STRBUF_INIT; const char *p; strbuf_getline(&item, fh, '\n'); p = skip_prefix(item.buf, "action="); if (!p) return error("client sent bogus action line: %s", item.buf); strbuf_addstr(action, p); strbuf_getline(&item, fh, '\n'); p = skip_prefix(item.buf, "timeout="); if (!p) return error("client sent bogus timeout line: %s", item.buf); *timeout = atoi(p); if (credential_read(c, fh) < 0) return -1; return 0; } static void serve_one_client(FILE *in, FILE *out) { struct credential c = CREDENTIAL_INIT; struct strbuf action = STRBUF_INIT; int timeout = -1; if (read_request(in, &c, &action, &timeout) < 0) /* ignore error */ ; else if (!strcmp(action.buf, "get")) { struct credential_cache_entry *e = lookup_credential(&c); if (e) { fprintf(out, "username=%s\n", e->item.username); fprintf(out, "password=%s\n", e->item.password); } } else if (!strcmp(action.buf, "exit")) exit(0); else if (!strcmp(action.buf, "erase")) remove_credential(&c); else if (!strcmp(action.buf, "store")) { if (timeout < 0) warning("cache client didn't specify a timeout"); else if (!c.username || !c.password) warning("cache client gave us a partial credential"); else { remove_credential(&c); cache_credential(&c, timeout); } } else warning("cache client sent unknown action: %s", action.buf); credential_clear(&c); strbuf_release(&action); } static int serve_cache_loop(int fd) { struct pollfd pfd; unsigned long wakeup; wakeup = check_expirations(); if (!wakeup) return 0; pfd.fd = fd; pfd.events = POLLIN; if (poll(&pfd, 1, 1000 * wakeup) < 0) { if (errno != EINTR) die_errno("poll failed"); return 1; } if (pfd.revents & POLLIN) { int client, client2; FILE *in, *out; client = accept(fd, NULL, NULL); if (client < 0) { warning("accept failed: %s", strerror(errno)); return 1; } client2 = dup(client); if (client2 < 0) { warning("dup failed: %s", strerror(errno)); close(client); return 1; } in = xfdopen(client, "r"); out = xfdopen(client2, "w"); serve_one_client(in, out); fclose(in); fclose(out); } return 1; } static void serve_cache(const char *socket_path) { int fd; fd = unix_stream_listen(socket_path); if (fd < 0) die_errno("unable to bind to '%s'", socket_path); printf("ok\n"); fclose(stdout); while (serve_cache_loop(fd)) ; /* nothing */ close(fd); unlink(socket_path); } static const char permissions_advice[] = "The permissions on your socket directory are too loose; other\n" "users may be able to read your cached credentials. Consider running:\n" "\n" " chmod 0700 %s"; static void check_socket_directory(const char *path) { struct stat st; char *path_copy = x