int diod_sock_connect (char *name, int flags) { int fd = -1; char *host = NULL; char *port; if (!name) fd = diod_sock_connect_inet ("localhost", "564", flags); else if (name[0] == '/') fd = diod_sock_connect_unix (name, flags); else if (!strchr (name, ':')) fd = diod_sock_connect_inet (name, "564", flags); else { if (!(host = strdup (name))) { errno = ENOMEM; if (!(flags & DIOD_SOCK_QUIET)) err ("diod_sock_connect %s", name); goto done; } if (!(port = strchr (host, ':'))) { errno = EINVAL; if (!(flags & DIOD_SOCK_QUIET)) err ("diod_sock_connect %s", name); goto done; } *port++ = '\0'; fd = diod_sock_connect_inet (host, port, flags); } done: if (host) free (host); return fd; }
int main (int argc, char *argv[]) { char *dir = NULL; char *spec, *host; char *nspec = NULL; int c, i; int nopt = 0; int vopt = 0; int fopt = 0; int aopt = 0; int dopt = 0; int rfd = -1, wfd = -1; Opt o; diod_log_init (argv[0]); o = opt_create (); opterr = 0; while ((c = GETOPT (argc, argv, OPTIONS, longopts)) != -1) { switch (c) { case 'f': /* --fake-mount */ fopt = 1; break; case 'n': /* --no-mtab */ nopt = 1; break; case 'v': /* --verbose */ vopt++; break; case 'o': /* --options OPT[,OPT]... */ opt_addf (o, "%s", optarg); break; case 'a': /* --9nbd-attach */ aopt++; break; case 'd': /* --9nbd-detach */ dopt++; break; default: usage (); } } /* Take care of 9nbd operations and exit. */ if (aopt) { _nbd_attach (o, argc - optind, argv + optind, nopt, vopt); exit (0); } if (dopt) { _nbd_detach (o, argc - optind, argv + optind, nopt, vopt); exit (0); } if (optind != argc - 2) usage (); if (geteuid () != 0) msg_exit ("you must be root"); spec = argv[optind++]; dir = argv[optind++]; host = _parse_spec (spec, o); _verify_mountpoint (dir); /* Remount - only pass mount flags into the VFS for an existing mount. * Take care of it here and exit. */ if (opt_find (o, "remount")) { if (opt_check_allowed_csv (o, "ro,rw,aname,remount")) msg_exit ("-oremount can only be used with ro,rw"); _diod_remount (o, spec, dir, vopt, fopt); goto done; } /* Ensure uname and access are set, and to diod-compatible values. * The uname user becomes the euid which will be used by munge auth. */ _parse_uname_access (o); if (seteuid (_uname2uid (opt_find (o, "uname"))) < 0) err_exit ("seteuid"); /* We require -otrans=fd because auth occurs in user space, then live fd * is passed to the kernel via -orfdno,wfdno. */ if (!opt_find (o, "trans")) opt_addf (o, "trans=%s", "fd"); else if (!opt_find (o, "trans=fd")) msg_exit ("only -otrans=fd transport is supported"); /* Set msize if not already set. Validate it later. */ if (!opt_find (o, "msize")) opt_addf (o, "msize=%d", DIOD_DEFAULT_MSIZE); /* Only .L version is supported. */ if (!opt_find (o, "version")) opt_addf (o, "version=%s", "9p2000.L"); else if (!opt_find (o, "version=9p2000.L")) msg_exit ("only -oversion=9p2000.L is supported (little p, big L)"); /* Set debug level. */ if (!opt_find (o, "debug")) opt_addf (o, "debug=%d", 0x1); /* send errors to dmesg */ /* Set rwdepth (number of concurrent reads with buffer > msize). * N.B. this option is not upstream yet but unknown options are ignored. */ if (!opt_find (o, "rwdepth")) opt_addf (o, "rwdepth=%d", 1); /* Server is on an inherited file descriptor. * For testing, we start server on a socketpair duped to fd 0. */ if (opt_find (o, "rfdno") || opt_find (o, "wfdno")) { if (!opt_scanf (o, "rfdno=%d", &rfd) || !opt_scanf (o, "wfdno=%d",&wfd)) msg_exit ("-orfdno,wfdno must be used together"); nopt = 1; /* force no mtab */ /* Connect to server on UNIX domain socket */ } else if (host[0] == '/') { if (opt_find (o, "port")) msg_exit ("-oport won't work with UNIX domain socket"); if ((rfd = diod_sock_connect_unix (host, 0)) < 0) exit (1); wfd = rfd; opt_addf (o, "rfdno=%d", rfd); opt_addf (o, "wfdno=%d", wfd); /* Connect to server on IANA port (or user-specified) and host. */ } else { char *port = opt_find (o, "port"); hostlist_iterator_t hi; hostlist_t hl; char *h; if (!port) port = "564"; if (!(hl = hostlist_create (host))) msg_exit ("error parsing host string: %s", host); if (!(hi = hostlist_iterator_create (hl))) msg_exit ("out of memory"); while ((h = hostlist_next (hi))) { if (vopt) msg ("trying to connect to %s:%s", h, port); if ((rfd = diod_sock_connect_inet (h, port, DIOD_SOCK_QUIET)) >= 0) break; } if (h) { /* create new 'spec' string identifying successful host */ char *p = strchr (spec , ':'); int len = strlen (h) + (p ? strlen (p) : 0) + 1; if (!(nspec = malloc (len))) msg_exit ("out of memory"); snprintf (nspec, len, "%s%s", h, p ? p : ""); } hostlist_destroy (hl); if (rfd < 0) msg_exit ("could not connect to server(s), giving up"); wfd = rfd; opt_delete (o, "port"); opt_addf (o, "rfdno=%d", rfd); opt_addf (o, "wfdno=%d", wfd); } NP_ASSERT (opt_find (o, "trans=fd")); NP_ASSERT (opt_scanf (o, "msize=%d", &i)); NP_ASSERT (opt_find (o, "version=9p2000.L")); NP_ASSERT (opt_scanf (o, "debug=%d", &i) || opt_scanf (o, "debug=%x", &i)); NP_ASSERT (opt_scanf (o, "wfdno=%d", &i) && opt_scanf (o, "rfdno=%d", &i)); NP_ASSERT ((opt_find (o, "access=user") && opt_find(o, "uname=root")) || (opt_scanf (o, "access=%d", &i) && opt_find(o, "uname"))); NP_ASSERT (!opt_find (o, "port")); _diod_mount (o, rfd, wfd, nspec ? nspec : spec, dir, vopt, fopt, nopt); done: opt_destroy (o); exit (0); }