/* perform actions that are common to all NAMED group addresses: checking if
the entry exists, parsing options, ev.removing old filesystem entry or
setting early owners and permissions.
It applies options of PH_EARLY and PH_PREOPEN.
If the path exists, its st_mode field is returned.
After this sub you may proceed with open() or whatever...
*/
int _xioopen_named_early(int argc, const char *argv[], xiofile_t *xfd,
int groups,
bool *exists, struct opt *opts) {
const char *path = argv[1];
unsigned int iogroups = 0;
#if HAVE_STAT64
struct stat64 statbuf;
#else
struct stat statbuf;
#endif /* !HAVE_STAT64 */
bool opt_unlink_early = false;
if (argc != 2) {
Error2("%s: wrong number of parameters (%d instead of 1)", argv[0]?argv[0]:"<named>", argc);
}
statbuf.st_mode = 0;
/* find the appropriate groupbits */
if (
#if HAVE_STAT64
Stat64(path, &statbuf) < 0
#else
Stat(path, &statbuf) < 0
#endif /* !HAVE_STAT64 */
) {
if (errno != ENOENT) {
Error2("stat(\"%s\"): %s", path, strerror(errno));
return STAT_RETRYLATER;
}
iogroups = GROUP_REG;
*exists = false;
} else {
iogroups = _groupbits(statbuf.st_mode);
*exists = true;
}
if (applyopts_single(&xfd->stream, opts, PH_INIT) < 0) return -1;
applyopts(-1, opts, PH_INIT);
retropt_bool(opts, OPT_UNLINK_EARLY, &opt_unlink_early);
if (*exists && opt_unlink_early) {
Info1("\"%s\" already exists; removing it", path);
if (Unlink(path) < 0) {
Error2("unlink(\"%s\"): %s", path, strerror(errno));
*exists = true;
} else {
*exists = false;
}
}
applyopts(-1, opts, PH_EARLY);
applyopts_named(path, opts, PH_EARLY);
if (*exists) {
applyopts_named(path, opts, PH_PREOPEN);
} else {
dropopts(opts, PH_PREOPEN);
}
return statbuf.st_mode;
}
/* retrieve the OPEN group options and perform the open() call.
returns the file descriptor or a negative value.
Applies options of phases PREOPEN, OPEN, PASTOPEN, and FD
*/
int _xioopen_open(const char *path, int rw, struct opt *opts) {
mode_t mode = 0666;
flags_t flags = rw;
bool flag;
int fd;
applyopts_named(path, opts, PH_PREOPEN);
/* this only applies pure OPEN flags, not mixed OPEN/FCNTL options */
applyopts_flags(opts, GROUP_OPEN, &flags);
/* we have to handle mixed OPEN/FCNTL flags specially */
if (retropt_bool(opts, OPT_O_APPEND, &flag) >= 0 && flag)
flags |= O_APPEND;
if (retropt_bool(opts, OPT_O_NONBLOCK, &flag) >= 0 && flag)
flags |= O_NONBLOCK;
#ifdef O_ASYNC
if (retropt_bool(opts, OPT_O_ASYNC, &flag) >= 0 && flag)
flags |= O_ASYNC;
#endif
if (retropt_bool(opts, OPT_O_TRUNC, &flag) >= 0 && flag)
flags |= O_TRUNC;
#ifdef O_BINARY
if (retropt_bool(opts, OPT_O_BINARY, &flag) >= 0 && flag)
flags |= O_BINARY;
#endif
#ifdef O_TEXT
if (retropt_bool(opts, OPT_O_TEXT, &flag) >= 0 && flag)
flags |= O_TEXT;
#endif
#ifdef O_NOINHERIT
if (retropt_bool(opts, OPT_O_NOINHERIT, &flag) >= 0 && flag)
flags |= O_NOINHERIT;
#endif
#ifdef O_NOATIME
if (retropt_bool(opts, OPT_O_NOATIME, &flag) >= 0 && flag)
flags |= O_NOATIME;
#endif
retropt_modet(opts, OPT_PERM, &mode);
if ((fd = Open(path, flags, mode)) < 0) {
Error4("open(\"%s\", 0%lo, 0%03o): %s",
path, flags, mode, strerror(errno));
return STAT_RETRYLATER;
}
/*0 Info4("open(\"%s\", 0%o, 0%03o) -> %d", path, flags, mode, fd);*/
applyopts_named(path, opts, PH_PASTOPEN);
#if 0
applyopts_named(path, opts, PH_FD);
applyopts(fd, opts, PH_FD);
applyopts_cloexec(fd, opts);
#endif
return fd;
}
/* open for writing:
if the filesystem entry already exists, the data is appended
if it does not exist, a file is created and the data is appended
*/
static int xioopen_open(int argc, const char *argv[], struct opt *opts, int xioflags, xiofile_t *fd, unsigned groups, int dummy1, int dummy2, int dummy3) {
const char *filename = argv[1];
int rw = (xioflags & XIO_ACCMODE);
bool exists;
bool opt_unlink_close = false;
int result;
/* remove old file, or set user/permissions on old file; parse options */
if ((result = _xioopen_named_early(argc, argv, fd, groups, &exists, opts)) < 0) {
return result;
}
retropt_bool(opts, OPT_UNLINK_CLOSE, &opt_unlink_close);
if (opt_unlink_close) {
if ((fd->stream.unlink_close = strdup(filename)) == NULL) {
Error1("strdup(\"%s\"): out of memory", filename);
}
fd->stream.opt_unlink_close = true;
}
Notice3("opening %s \"%s\" for %s",
filetypenames[(result&S_IFMT)>>12], filename, ddirection[rw]);
if ((result = _xioopen_open(filename, rw, opts)) < 0)
return result;
fd->stream.fd = result;
#if WITH_TERMIOS
if (Isatty(fd->stream.fd)) {
if (Tcgetattr(fd->stream.fd, &fd->stream.savetty) < 0) {
Warn2("cannot query current terminal settings on fd %d: %s",
fd->stream.fd, strerror(errno));
} else {
fd->stream.ttyvalid = true;
}
}
#endif /* WITH_TERMIOS */
applyopts_named(filename, opts, PH_FD);
applyopts(fd->stream.fd, opts, PH_FD);
applyopts_cloexec(fd->stream.fd, opts);
applyopts_fchown(fd->stream.fd, opts);
if ((result = _xio_openlate(&fd->stream, opts)) < 0)
return result;
return 0;
}
static int xioopen_creat(int argc, const char *argv[], struct opt *opts, int xioflags, xiofile_t *xfd, unsigned groups, int dummy1, int dummy2, int dummy3) {
const char *filename = argv[1];
int rw = (xioflags&XIO_ACCMODE);
int fd;
bool exists;
bool opt_unlink_close = false;
int result;
/* remove old file, or set user/permissions on old file; parse options */
if ((result = _xioopen_named_early(argc, argv, xfd, groups, &exists, opts)) < 0) {
return result;
}
retropt_bool(opts, OPT_UNLINK_CLOSE, &opt_unlink_close);
if (opt_unlink_close) {
if ((xfd->stream.unlink_close = strdup(filename)) == NULL) {
Error1("strdup(\"%s\"): out of memory", filename);
}
xfd->stream.opt_unlink_close = true;
}
Notice2("creating regular file \"%s\" for %s", filename, ddirection[rw]);
if ((fd = _xioopen_creat(filename, rw, opts)) < 0)
return fd;
if (XIOWITHRD(rw)) xfd->stream.rfd = fd;
if (XIOWITHWR(rw)) xfd->stream.wfd = fd;
applyopts_named(filename, opts, PH_PASTOPEN);
if ((result = applyopts2(fd, opts, PH_PASTOPEN, PH_LATE2)) < 0)
return result;
applyopts_cloexec(fd, opts);
applyopts_fchown(fd, opts);
if ((result = _xio_openlate(&xfd->stream, opts)) < 0)
return result;
return 0;
}
static int xioopen_unix_listen(int argc, const char *argv[], struct opt *opts, int xioflags, xiofile_t *xxfd, unsigned groups, int abstract, int dummy2, int dummy3) {
/* we expect the form: filename */
const char *name;
xiosingle_t *xfd = &xxfd->stream;
int pf = PF_UNIX;
int socktype = SOCK_STREAM;
int protocol = 0;
struct sockaddr_un us;
socklen_t uslen;
bool tight = true;
struct opt *opts0 = NULL;
pid_t pid = Getpid();
bool opt_unlink_early = false;
bool opt_unlink_close = true;
int result;
if (argc != 2) {
Error2("%s: wrong number of parameters (%d instead of 1)",
argv[0], argc-1);
return STAT_NORETRY;
}
name = argv[1];
retropt_socket_pf(opts, &pf);
retropt_bool(opts, OPT_UNIX_TIGHTSOCKLEN, &tight);
uslen = xiosetunix(pf, &us, name, abstract, tight);
xfd->howtoend = END_SHUTDOWN;
if (!(ABSTRACT && abstract)) {
/* only for non abstract because abstract do not work in file system */
retropt_bool(opts, OPT_UNLINK_EARLY, &opt_unlink_early);
retropt_bool(opts, OPT_UNLINK_CLOSE, &opt_unlink_close);
}
if (applyopts_single(xfd, opts, PH_INIT) < 0) return STAT_NORETRY;
applyopts(-1, opts, PH_INIT);
applyopts(-1, opts, PH_EARLY);
if (!(ABSTRACT && abstract)) {
if (opt_unlink_early) {
if (Unlink(name) < 0) {
if (errno == ENOENT) {
Warn2("unlink(\"%s\"): %s", name, strerror(errno));
} else {
Error2("unlink(\"%s\"): %s", name, strerror(errno));
}
}
}
/* trying to set user-early, perm-early etc. here is useless because
file system entry is available only past bind() call. */
applyopts_named(name, opts, PH_EARLY); /* umask! */
}
opts0 = copyopts(opts, GROUP_ALL);
if ((result =
xioopen_listen(xfd, xioflags,
(struct sockaddr *)&us, uslen,
opts, opts0, pf, socktype, protocol))
!= 0)
return result;
/* we set this option as late as now because we should not remove an
existing entry when bind() failed */
if (!(ABSTRACT && abstract)) {
if (opt_unlink_close) {
if (pid == Getpid()) {
if ((xfd->unlink_close = strdup(name)) == NULL) {
Error1("strdup(\"%s\"): out of memory", name);
}
xfd->opt_unlink_close = true;
}
}
}
return 0;
}
static int xioopen_tun(int argc, const char *argv[], struct opt *opts, int xioflags, xiofile_t *xfd, unsigned groups, int dummy1, int dummy2, int dummy3) {
char *tundevice = NULL;
char *tunname = NULL, *tuntype = NULL;
int pf = /*! PF_UNSPEC*/ PF_INET;
struct xiorange network;
bool no_pi = false;
const char *namedargv[] = { "tun", NULL, NULL };
int rw = (xioflags & XIO_ACCMODE);
bool exists;
struct ifreq ifr;
int sockfd;
char *ifaddr;
int result;
if (argc > 2 || argc < 0) {
Error2("%s: wrong number of parameters (%d instead of 0 or 1)",
argv[0], argc-1);
}
if (retropt_string(opts, OPT_TUN_DEVICE, &tundevice) != 0) {
tundevice = strdup("/dev/net/tun");
}
/*! socket option here? */
retropt_socket_pf(opts, &pf);
namedargv[1] = tundevice;
/* open the tun cloning device */
if ((result = _xioopen_named_early(2, namedargv, xfd, groups, &exists, opts)) < 0) {
return result;
}
/*========================= the tunnel interface =========================*/
Notice("creating tunnel network interface");
if ((result = _xioopen_open(tundevice, rw, opts)) < 0)
return result;
xfd->stream.fd = result;
/* prepare configuration of the new network interface */
memset(&ifr, 0,sizeof(ifr));
if (retropt_string(opts, OPT_TUN_NAME, &tunname) == 0) {
strncpy(ifr.ifr_name, tunname, IFNAMSIZ); /* ok */
free(tunname);
} else {
ifr.ifr_name[0] = '\0';
}
ifr.ifr_flags = IFF_TUN;
if (retropt_string(opts, OPT_TUN_TYPE, &tuntype) == 0) {
if (!strcmp(tuntype, "tap")) {
ifr.ifr_flags = IFF_TAP;
} else if (strcmp(tuntype, "tun")) {
Error1("unknown tun-type \"%s\"", tuntype);
}
}
if (retropt_bool(opts, OPT_IFF_NO_PI, &no_pi) == 0) {
if (no_pi) {
ifr.ifr_flags |= IFF_NO_PI;
#if 0 /* not neccessary for now */
} else {
ifr.ifr_flags &= ~IFF_NO_PI;
#endif
}
}
if (Ioctl(xfd->stream.fd, TUNSETIFF, &ifr) < 0) {
Error3("ioctl(%d, TUNSETIFF, {\"%s\"}: %s",
xfd->stream.fd, ifr.ifr_name, strerror(errno));
Close(xfd->stream.fd);
}
/*===================== setting interface properties =====================*/
/* we seem to need a socket for manipulating the interface */
if ((sockfd = Socket(PF_INET, SOCK_DGRAM, 0)) < 0) {
Error1("socket(PF_INET, SOCK_DGRAM, 0): %s", strerror(errno));
sockfd = xfd->stream.fd; /* desparate fallback attempt */
}
/*--------------------- setting interface address and netmask ------------*/
if (argc == 2) {
if ((ifaddr = strdup(argv[1])) == NULL) {
Error1("strdup(\"%s\"): out of memory", argv[1]);
return STAT_RETRYLATER;
}
if ((result = xioparsenetwork(ifaddr, pf, &network)) != STAT_OK) {
/*! recover */
return result;
}
socket_init(pf, (union sockaddr_union *)&ifr.ifr_addr);
((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr =
network.netaddr.ip4.sin_addr;
if (Ioctl(sockfd, SIOCSIFADDR, &ifr) < 0) {
Error4("ioctl(%d, SIOCSIFADDR, {\"%s\", \"%s\"}: %s",
sockfd, ifr.ifr_name, ifaddr, strerror(errno));
}
((struct sockaddr_in *)&ifr.ifr_netmask)->sin_addr =
network.netmask.ip4.sin_addr;
if (Ioctl(sockfd, SIOCSIFNETMASK, &ifr) < 0) {
Error4("ioctl(%d, SIOCSIFNETMASK, {\"0x%08u\", \"%s\"}, %s",
sockfd, ((struct sockaddr_in *)&ifr.ifr_netmask)->sin_addr.s_addr,
ifaddr, strerror(errno));
}
free(ifaddr);
}
/*--------------------- setting interface flags --------------------------*/
applyopts_single(&xfd->stream, opts, PH_FD);
if (Ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
Error3("ioctl(%d, SIOCGIFFLAGS, {\"%s\"}: %s",
sockfd, ifr.ifr_name, strerror(errno));
}
Debug2("\"%s\": system set flags: 0x%hx", ifr.ifr_name, ifr.ifr_flags);
ifr.ifr_flags |= xfd->stream.para.tun.iff_opts[0];
ifr.ifr_flags &= ~xfd->stream.para.tun.iff_opts[1];
Debug2("\"%s\": xio merged flags: 0x%hx", ifr.ifr_name, ifr.ifr_flags);
if (Ioctl(sockfd, SIOCSIFFLAGS, &ifr) < 0) {
Error4("ioctl(%d, SIOCSIFFLAGS, {\"%s\", %hd}: %s",
sockfd, ifr.ifr_name, ifr.ifr_flags, strerror(errno));
}
ifr.ifr_flags = 0;
if (Ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
Error3("ioctl(%d, SIOCGIFFLAGS, {\"%s\"}: %s",
sockfd, ifr.ifr_name, strerror(errno));
}
Debug2("\"%s\": resulting flags: 0x%hx", ifr.ifr_name, ifr.ifr_flags);
#if LATER
applyopts_named(tundevice, opts, PH_FD);
#endif
applyopts(xfd->stream.fd, opts, PH_FD);
applyopts_cloexec(xfd->stream.fd, opts);
applyopts_fchown(xfd->stream.fd, opts);
if ((result = _xio_openlate(&xfd->stream, opts)) < 0)
return result;
return 0;
}
/* creates the listening socket, bind, applies options; waits for incoming
connection, checks its source address and port. Depending on fork option, it
may fork a subprocess.
pf specifies the syntax expected for range option. In the case of generic
socket it is 0 (expecting raw binary data), and the real pf can be obtained
from us->af_family; for other socket types pf == us->af_family
Returns 0 if a connection was accepted; with fork option, this is always in
a subprocess!
Other return values indicate a problem; this can happen in the master
process or in a subprocess.
This function does not retry. If you need retries, handle this in a
loop in the calling function (and always provide the options...)
After fork, we set the forever/retry of the child process to 0
applies and consumes the following option:
PH_INIT, PH_PASTSOCKET, PH_PREBIND, PH_BIND, PH_PASTBIND, PH_EARLY,
PH_PREOPEN, PH_FD, PH_CONNECTED, PH_LATE, PH_LATE2
OPT_FORK, OPT_SO_TYPE, OPT_SO_PROTOTYPE, OPT_BACKLOG, OPT_RANGE, tcpwrap,
OPT_SOURCEPORT, OPT_LOWPORT, cloexec
*/
int _xioopen_listen(struct single *xfd, int xioflags, struct sockaddr *us, socklen_t uslen,
struct opt *opts, int pf, int socktype, int proto, int level) {
struct sockaddr sa;
socklen_t salen;
int backlog = 5; /* why? 1 seems to cause problems under some load */
char *rangename;
bool dofork = false;
int maxchildren = 0;
char infobuff[256];
char lisname[256];
union sockaddr_union _peername;
union sockaddr_union _sockname;
union sockaddr_union *pa = &_peername; /* peer address */
union sockaddr_union *la = &_sockname; /* local address */
socklen_t pas = sizeof(_peername); /* peer address size */
socklen_t las = sizeof(_sockname); /* local address size */
int result;
retropt_bool(opts, OPT_FORK, &dofork);
if (dofork) {
if (!(xioflags & XIO_MAYFORK)) {
Error("option fork not allowed here");
return STAT_NORETRY;
}
xfd->flags |= XIO_DOESFORK;
}
retropt_int(opts, OPT_MAX_CHILDREN, &maxchildren);
if (! dofork && maxchildren) {
Error("option max-children not allowed without option fork");
return STAT_NORETRY;
}
if (applyopts_single(xfd, opts, PH_INIT) < 0) return -1;
if (dofork) {
xiosetchilddied(); /* set SIGCHLD handler */
}
if ((xfd->fd = xiosocket(opts, us->sa_family, socktype, proto, level)) < 0) {
return STAT_RETRYLATER;
}
applyopts_cloexec(xfd->fd, opts);
applyopts(xfd->fd, opts, PH_PREBIND);
applyopts(xfd->fd, opts, PH_BIND);
if (Bind(xfd->fd, (struct sockaddr *)us, uslen) < 0) {
Msg4(level, "bind(%d, {%s}, "F_socklen"): %s", xfd->fd,
sockaddr_info(us, uslen, infobuff, sizeof(infobuff)), uslen,
strerror(errno));
Close(xfd->fd);
return STAT_RETRYLATER;
}
#if WITH_UNIX
if (us->sa_family == AF_UNIX) {
applyopts_named(((struct sockaddr_un *)us)->sun_path, opts, PH_FD);
}
#endif
/* under some circumstances (e.g., TCP listen on port 0) bind() fills empty
fields that we want to know. */
salen = sizeof(sa);
if (Getsockname(xfd->fd, us, &uslen) < 0) {
Warn4("getsockname(%d, %p, {%d}): %s",
xfd->fd, &us, uslen, strerror(errno));
}
applyopts(xfd->fd, opts, PH_PASTBIND);
#if WITH_UNIX
if (us->sa_family == AF_UNIX) {
/*applyopts_early(((struct sockaddr_un *)us)->sun_path, opts);*/
applyopts_named(((struct sockaddr_un *)us)->sun_path, opts, PH_EARLY);
applyopts_named(((struct sockaddr_un *)us)->sun_path, opts, PH_PREOPEN);
}
#endif /* WITH_UNIX */
#if WITH_IP4 /*|| WITH_IP6*/
if (retropt_string(opts, OPT_RANGE, &rangename) >= 0) {
if (xioparserange(rangename, pf, &xfd->para.socket.range)
< 0) {
free(rangename);
return STAT_NORETRY;
}
free(rangename);
xfd->para.socket.dorange = true;
}
#endif
#if (WITH_TCP || WITH_UDP) && WITH_LIBWRAP
xio_retropt_tcpwrap(xfd, opts);
#endif /* && (WITH_TCP || WITH_UDP) && WITH_LIBWRAP */
#if WITH_TCP || WITH_UDP
if (retropt_ushort(opts, OPT_SOURCEPORT, &xfd->para.socket.ip.sourceport) >= 0) {
xfd->para.socket.ip.dosourceport = true;
}
retropt_bool(opts, OPT_LOWPORT, &xfd->para.socket.ip.lowport);
#endif /* WITH_TCP || WITH_UDP */
applyopts(xfd->fd, opts, PH_PRELISTEN);
retropt_int(opts, OPT_BACKLOG, &backlog);
if (Listen(xfd->fd, backlog) < 0) {
Error3("listen(%d, %d): %s", xfd->fd, backlog, strerror(errno));
return STAT_RETRYLATER;
}
if (xioopts.logopt == 'm') {
Info("starting accept loop, switching to syslog");
diag_set('y', xioopts.syslogfac); xioopts.logopt = 'y';
} else {
Info("starting accept loop");
}
while (true) { /* but we only loop if fork option is set */
char peername[256];
char sockname[256];
int ps; /* peer socket */
pa = &_peername;
la = &_sockname;
salen = sizeof(struct sockaddr);
do {
/*? int level = E_ERROR;*/
Notice1("listening on %s", sockaddr_info(us, uslen, lisname, sizeof(lisname)));
ps = Accept(xfd->fd, (struct sockaddr *)&sa, &salen);
if (ps >= 0) {
/*0 Info4("accept(%d, %p, {"F_Zu"}) -> %d", xfd->fd, &sa, salen, ps);*/
break; /* success, break out of loop */
}
if (errno == EINTR) {
continue;
}
if (errno == ECONNABORTED) {
Notice4("accept(%d, %p, {"F_socklen"}): %s",
xfd->fd, &sa, salen, strerror(errno));
continue;
}
Msg4(level, "accept(%d, %p, {"F_socklen"}): %s",
xfd->fd, &sa, salen, strerror(errno));
Close(xfd->fd);
return STAT_RETRYLATER;
} while (true);
applyopts_cloexec(ps, opts);
if (Getpeername(ps, &pa->soa, &pas) < 0) {
Warn4("getpeername(%d, %p, {"F_socklen"}): %s",
ps, pa, pas, strerror(errno));
pa = NULL;
}
if (Getsockname(ps, &la->soa, &las) < 0) {
Warn4("getsockname(%d, %p, {"F_socklen"}): %s",
ps, la, las, strerror(errno));
la = NULL;
}
Notice2("accepting connection from %s on %s",
pa?
sockaddr_info(&pa->soa, pas, peername, sizeof(peername)):"NULL",
la?
sockaddr_info(&la->soa, las, sockname, sizeof(sockname)):"NULL");
if (pa != NULL && la != NULL && xiocheckpeer(xfd, pa, la) < 0) {
if (Shutdown(ps, 2) < 0) {
Info2("shutdown(%d, 2): %s", ps, strerror(errno));
}
Close(ps);
continue;
}
if (pa != NULL)
Info1("permitting connection from %s",
sockaddr_info((struct sockaddr *)pa, pas,
infobuff, sizeof(infobuff)));
if (dofork) {
pid_t pid; /* mostly int; only used with fork */
sigset_t mask_sigchld;
/* we must prevent that the current packet triggers another fork;
therefore we wait for a signal from the recent child: USR1
indicates that is has consumed the last packet; CHLD means it has
terminated */
/* block SIGCHLD and SIGUSR1 until parent is ready to react */
sigemptyset(&mask_sigchld);
sigaddset(&mask_sigchld, SIGCHLD);
Sigprocmask(SIG_BLOCK, &mask_sigchld, NULL);
if ((pid = xio_fork(false, level==E_ERROR?level:E_WARN)) < 0) {
Close(xfd->fd);
Sigprocmask(SIG_UNBLOCK, &mask_sigchld, NULL);
return STAT_RETRYLATER;
}
if (pid == 0) { /* child */
pid_t cpid = Getpid();
Sigprocmask(SIG_UNBLOCK, &mask_sigchld, NULL);
Info1("just born: child process "F_pid, cpid);
xiosetenvulong("PID", cpid, 1);
if (Close(xfd->fd) < 0) {
Info2("close(%d): %s", xfd->fd, strerror(errno));
}
xfd->fd = ps;
#if WITH_RETRY
/* !? */
xfd->forever = false; xfd->retry = 0;
level = E_ERROR;
#endif /* WITH_RETRY */
break;
}
/* server: continue loop with listen */
/* shutdown() closes the socket even for the child process, but
close() does what we want */
if (Close(ps) < 0) {
Info2("close(%d): %s", ps, strerror(errno));
}
/* now we are ready to handle signals */
Sigprocmask(SIG_UNBLOCK, &mask_sigchld, NULL);
while (maxchildren) {
if (num_child < maxchildren) break;
Notice("maxchildren are active, waiting");
/* UINT_MAX would even be nicer, but Openindiana works only
with 31 bits */
while (!Sleep(INT_MAX)) ; /* any signal lets us continue */
}
Info("still listening");
} else {
if (Close(xfd->fd) < 0) {
Info2("close(%d): %s", xfd->fd, strerror(errno));
}
xfd->fd = ps;
break;
}
}
applyopts(xfd->fd, opts, PH_FD);
applyopts(xfd->fd, opts, PH_PASTSOCKET);
applyopts(xfd->fd, opts, PH_CONNECTED);
if ((result = _xio_openlate(xfd, opts)) < 0)
return result;
/* set the env vars describing the local and remote sockets */
if (la != NULL) xiosetsockaddrenv("SOCK", la, las, proto);
if (pa != NULL) xiosetsockaddrenv("PEER", pa, pas, proto);
return 0;
}
static
int xioopen_unix_recv(int argc, const char *argv[], struct opt *opts,
int xioflags, xiofile_t *xxfd, unsigned groups,
int abstract, int dummy2, int dummy3) {
/* we expect the form: filename */
const char *name;
xiosingle_t *xfd = &xxfd->stream;
int pf = PF_UNIX;
int socktype = SOCK_DGRAM;
int protocol = 0;
union sockaddr_union us;
socklen_t uslen;
bool tight = true;
bool opt_unlink_early = false;
bool opt_unlink_close = true;
int result;
if (argc != 2) {
Error2("%s: wrong number of parameters (%d instead of 1)",
argv[0], argc-1);
return STAT_NORETRY;
}
name = argv[1];
retropt_socket_pf(opts, &pf);
retropt_bool(opts, OPT_UNIX_TIGHTSOCKLEN, &tight);
uslen = xiosetunix(pf, &us.un, name, abstract, tight);
#if 1 /*!!! why bind option? */
retropt_bind(opts, pf, socktype, protocol, &us.soa, &uslen, 1, 0, 0);
#endif
if (!(ABSTRACT && abstract)) {
/* only for non abstract because abstract do not work in file system */
retropt_bool(opts, OPT_UNLINK_EARLY, &opt_unlink_early);
retropt_bool(opts, OPT_UNLINK_CLOSE, &opt_unlink_close);
if (opt_unlink_early) {
if (Unlink(name) < 0) {
if (errno == ENOENT) {
Warn2("unlink(\"%s\"): %s", name, strerror(errno));
} else {
Error2("unlink(\"%s\"): %s", name, strerror(errno));
}
}
} else {
struct stat buf;
if (Lstat(name, &buf) == 0) {
Error1("\"%s\" exists", name);
return STAT_RETRYLATER;
}
}
if (opt_unlink_close) {
if ((xfd->unlink_close = strdup(name)) == NULL) {
Error1("strdup(\"%s\"): out of memory", name);
}
xfd->opt_unlink_close = true;
}
}
applyopts_named(name, opts, PH_EARLY); /* umask! */
xfd->para.socket.la.soa.sa_family = pf;
xfd->dtype = XIODATA_RECV;
result = _xioopen_dgram_recv(xfd, xioflags, &us.soa, uslen,
opts, pf, socktype, protocol, E_ERROR);
return result;
}
static
int xioopen_unix_recvfrom(int argc, const char *argv[], struct opt *opts,
int xioflags, xiofile_t *xxfd, unsigned groups,
int abstract, int dummy2, int dummy3) {
/* we expect the form: filename */
const char *name;
xiosingle_t *xfd = &xxfd->stream;
int pf = PF_UNIX;
int socktype = SOCK_DGRAM;
int protocol = 0;
struct sockaddr_un us;
socklen_t uslen;
bool tight = true;
bool needbind = true;
bool opt_unlink_early = false;
bool opt_unlink_close = true;
if (argc != 2) {
Error2("%s: wrong number of parameters (%d instead of 1)",
argv[0], argc-1);
return STAT_NORETRY;
}
name = argv[1];
retropt_socket_pf(opts, &pf);
retropt_bool(opts, OPT_UNIX_TIGHTSOCKLEN, &tight);
uslen = xiosetunix(pf, &us, name, abstract, tight);
xfd->howtoend = END_NONE;
retropt_bind(opts, pf, socktype, protocol, (struct sockaddr *)&us, &uslen,
1, 0, 0);
if (!(ABSTRACT && abstract)) {
/* only for non abstract because abstract do not work in file system */
retropt_bool(opts, OPT_UNLINK_EARLY, &opt_unlink_early);
retropt_bool(opts, OPT_UNLINK_CLOSE, &opt_unlink_close);
}
if (!(ABSTRACT && abstract)) {
if (opt_unlink_early) {
if (Unlink(name) < 0) {
if (errno == ENOENT) {
Warn2("unlink(\"%s\"): %s", name, strerror(errno));
} else {
Error2("unlink(\"%s\"): %s", name, strerror(errno));
}
}
} else {
struct stat buf;
if (Lstat(name, &buf) == 0) {
Error1("\"%s\" exists", name);
return STAT_RETRYLATER;
}
}
if (opt_unlink_close) {
if ((xfd->unlink_close = strdup(name)) == NULL) {
Error1("strdup(\"%s\"): out of memory", name);
}
xfd->opt_unlink_close = true;
}
/* trying to set user-early, perm-early etc. here is useless because
file system entry is available only past bind() call. */
}
applyopts_named(name, opts, PH_EARLY); /* umask! */
xfd->para.socket.la.soa.sa_family = pf;
xfd->dtype = XIODATA_RECVFROM_ONE;
/* this may fork */
return
_xioopen_dgram_recvfrom(xfd, xioflags,
needbind?(struct sockaddr *)&us:NULL, uslen,
opts, pf, socktype, protocol, E_ERROR);
}
/* open a named or unnamed pipe/fifo */
static int xioopen_fifo(int argc, const char *argv[], struct opt *opts, int xioflags, xiofile_t *fd, unsigned groups, int dummy1, int dummy2, int dummy3) {
const char *pipename = argv[1];
int rw = (xioflags & XIO_ACCMODE);
#if HAVE_STAT64
struct stat64 pipstat;
#else
struct stat pipstat;
#endif /* !HAVE_STAT64 */
bool opt_unlink_early = false;
bool opt_unlink_close = true;
mode_t mode = 0666;
int result;
if (argc == 1) {
return xioopen_fifo_unnamed(fd, fd->stream.opts);
}
if (argc != 2) {
Error2("%s: wrong number of parameters (%d instead of 1)", argv[0], argc-1);
}
if (applyopts_single(&fd->stream, opts, PH_INIT) < 0) return -1;
applyopts(-1, opts, PH_INIT);
retropt_bool(opts, OPT_UNLINK_EARLY, &opt_unlink_early);
applyopts_named(pipename, opts, PH_EARLY); /* umask! */
applyopts(-1, opts, PH_EARLY);
if (opt_unlink_early) {
if (Unlink(pipename) < 0) {
if (errno == ENOENT) {
Warn2("unlink(%s): %s", pipename, strerror(errno));
} else {
Error2("unlink(%s): %s", pipename, strerror(errno));
return STAT_RETRYLATER;
}
}
}
retropt_bool(opts, OPT_UNLINK_CLOSE, &opt_unlink_close);
retropt_modet(opts, OPT_PERM, &mode);
if (applyopts_named(pipename, opts, PH_EARLY) < 0) {
return STAT_RETRYLATER;
}
if (applyopts_named(pipename, opts, PH_PREOPEN) < 0) {
return STAT_RETRYLATER;
}
if (
#if HAVE_STAT64
Stat64(pipename, &pipstat) < 0
#else
Stat(pipename, &pipstat) < 0
#endif /* !HAVE_STAT64 */
) {
if (errno != ENOENT) {
Error3("stat(\"%s\", %p): %s", pipename, &pipstat, strerror(errno));
} else {
Debug1("xioopen_fifo(\"%s\"): does not exist, creating fifo", pipename);
#if 0
result = Mknod(pipename, S_IFIFO|mode, 0);
if (result < 0) {
Error3("mknod(%s, %d, 0): %s", pipename, mode, strerror(errno));
return STAT_RETRYLATER;
}
#else
result = Mkfifo(pipename, mode);
if (result < 0) {
Error3("mkfifo(%s, %d): %s", pipename, mode, strerror(errno));
return STAT_RETRYLATER;
}
#endif
Notice2("created named pipe \"%s\" for %s", pipename, ddirection[rw]);
applyopts_named(pipename, opts, PH_ALL);
}
if (opt_unlink_close) {
if ((fd->stream.unlink_close = strdup(pipename)) == NULL) {
Error1("strdup(\"%s\"): out of memory", pipename);
}
fd->stream.opt_unlink_close = true;
}
} else {
/* exists */
Debug1("xioopen_fifo(\"%s\"): already exist, opening it", pipename);
Notice3("opening %s \"%s\" for %s",
filetypenames[(pipstat.st_mode&S_IFMT)>>12],
pipename, ddirection[rw]);
/*applyopts_early(pipename, opts);*/
applyopts_named(pipename, opts, PH_EARLY);
}
if ((result = _xioopen_open(pipename, rw, opts)) < 0) {
return result;
}
fd->stream.fd = result;
applyopts_named(pipename, opts, PH_FD);
applyopts(fd->stream.fd, opts, PH_FD);
applyopts_cloexec(fd->stream.fd, opts);
return _xio_openlate(&fd->stream, opts);
}
static int xioopen_pty(int argc, const char *argv[], struct opt *opts, int xioflags, xiofile_t *xfd, unsigned groups, int dummy1, int dummy2, int dummy3) {
/* we expect the form: filename */
int ptyfd = -1, ttyfd = -1;
#if defined(HAVE_DEV_PTMX) || defined(HAVE_DEV_PTC)
bool useptmx = false; /* use /dev/ptmx or equivalent */
#endif
#if HAVE_OPENPTY
bool useopenpty = false; /* try only openpty */
#endif /* HAVE_OPENPTY */
char ptyname[MAXPTYNAMELEN];
char *tn = NULL;
char *linkname = NULL;
bool opt_unlink_close = true; /* remove symlink afterwards */
bool wait_slave = false; /* true would be better for many platforms, but
some OSes cannot handle this, and for common
default behaviour as well as backward
compatibility we choose "no" as default */
struct timespec pollintv = { PTY_INTERVALL };
if (argc != 1) {
Error2("%s: wrong number of parameters (%d instead of 0)", argv[0], argc-1);
}
xfd->stream.howtoend = END_CLOSE;
if (applyopts_single(&xfd->stream, opts, PH_INIT) < 0) return -1;
applyopts(-1, opts, PH_INIT);
retropt_bool(opts, OPT_UNLINK_CLOSE, &opt_unlink_close);
/* trying to set user-early, perm-early etc. here might be useless because
file system entry is eventually available only past pty creation */
/* name not yet known; umask should not be handled with this function! */
/* umask does not affect resulting mode, on Linux 2.4 */
applyopts_named("", opts, PH_EARLY); /* umask! */
#if defined(HAVE_DEV_PTMX) || defined(HAVE_DEV_PTC)
retropt_bool(opts, OPT_PTMX, &useptmx);
#endif
#if HAVE_OPENPTY
retropt_bool(opts, OPT_OPENPTY, &useopenpty);
#endif
#if (defined(HAVE_DEV_PTMX) || defined(HAVE_DEV_PTC))
# if HAVE_OPENPTY
useopenpty = !useptmx;
# else /* !HAVE_OPENPTY */
useptmx = true;
# endif /* !HAVE_OPENPTY */
#else
# if HAVE_OPENPTY
useopenpty = true;
# endif /* HAVE_OPENPTY */
#endif /* ! (defined(HAVE_DEV_PTMX) || defined(HAVE_DEV_PTC)) */
#if HAVE_POLL
retropt_bool(opts, OPT_PTY_WAIT_SLAVE, &wait_slave);
retropt_timespec(opts, OPT_PTY_INTERVALL, &pollintv);
#endif /* HAVE_POLL */
if (applyopts_single(&xfd->stream, opts, PH_INIT) < 0) return -1;
applyopts2(-1, opts, PH_INIT, PH_EARLY);
applyopts(-1, opts, PH_PREBIGEN);
#if defined(HAVE_DEV_PTMX)
# define PTMX "/dev/ptmx" /* Linux */
#elif HAVE_DEV_PTC
# define PTMX "/dev/ptc" /* AIX 4.3.3 */
#endif
#if HAVE_DEV_PTMX || HAVE_DEV_PTC
if (useptmx) {
if ((ptyfd = Open(PTMX, O_RDWR|O_NOCTTY, 0620)) < 0) {
Warn1("open(\""PTMX"\", O_RDWR|O_NOCTTY, 0620): %s",
strerror(errno));
/*!*/
} else {
;/*0 Info1("open(\""PTMX"\", O_RDWR|O_NOCTTY, 0620) -> %d", ptyfd);*/
}
if (ptyfd >= 0 && ttyfd < 0) {
/* we used PTMX before forking */
/*0 extern char *ptsname(int);*/
#if HAVE_GRANTPT /* AIX, not Linux */
if (Grantpt(ptyfd)/*!*/ < 0) {
Warn2("grantpt(%d): %s", ptyfd, strerror(errno));
}
#endif /* HAVE_GRANTPT */
#if HAVE_UNLOCKPT
if (Unlockpt(ptyfd)/*!*/ < 0) {
Warn2("unlockpt(%d): %s", ptyfd, strerror(errno));
}
#endif /* HAVE_UNLOCKPT */
#if HAVE_PROTOTYPE_LIB_ptsname /* AIX, not Linux */
if ((tn = Ptsname(ptyfd)) == NULL) {
Warn2("ptsname(%d): %s", ptyfd, strerror(errno));
} else {
Notice1("PTY is %s", tn);
}
#endif /* HAVE_PROTOTYPE_LIB_ptsname */
if (tn == NULL) {
if ((tn = Ttyname(ptyfd)) == NULL) {
Warn2("ttyname(%d): %s", ptyfd, strerror(errno));
}
}
ptyname[0] = '\0'; strncat(ptyname, tn, MAXPTYNAMELEN-1);
}
}
#endif /* HAVE_DEV_PTMX || HAVE_DEV_PTC */
#if HAVE_OPENPTY
if (ptyfd < 0) {
int result;
if ((result = Openpty(&ptyfd, &ttyfd, ptyname, NULL, NULL)) < 0) {
Error4("openpty(%p, %p, %p, NULL, NULL): %s",
&ptyfd, &ttyfd, ptyname, strerror(errno));
return -1;
}
Notice1("PTY is %s", ptyname);
}
#endif /* HAVE_OPENPTY */
if (!retropt_string(opts, OPT_SYMBOLIC_LINK, &linkname)) {
if (Unlink(linkname) < 0 && errno != ENOENT) {
Error2("unlink(\"%s\"): %s", linkname, strerror(errno));
}
if (Symlink(ptyname, linkname) < 0) {
Error3("symlink(\"%s\", \"%s\"): %s",
ptyname, linkname, strerror(errno));
}
if (opt_unlink_close) {
if ((xfd->stream.unlink_close = strdup(linkname)) == NULL) {
Error1("strdup(\"%s\"): out of memory", linkname);
}
xfd->stream.opt_unlink_close = true;
}
}
applyopts_named(ptyname, opts, PH_PASTOPEN);
applyopts_named(ptyname, opts, PH_FD);
applyopts_cloexec(ptyfd, opts);/*!*/
xfd->stream.dtype = XIODATA_PTY;
applyopts(ptyfd, opts, PH_FD);
{
/* special handling of user-late etc.; with standard behaviour (up to
1.7.1.1) they affected /dev/ptmx instead of /dev/pts/N */
uid_t uid = -1, gid = -1;
mode_t perm;
bool dont;
dont = retropt_uid(opts, OPT_USER_LATE, &uid);
dont &= retropt_gid(opts, OPT_GROUP_LATE, &gid);
if (!dont) {
if (Chown(ptyname, uid, gid) < 0) {
Error4("chown(\"%s\", %d, %d): %s",
ptyname, uid, gid, strerror(errno));
}
}
if (retropt_mode(opts, OPT_PERM_LATE, &perm) == 0) {
if (Chmod(ptyname, perm) < 0) {
Error3("chmod(\"%s\", %03o): %s",
ptyname, perm, strerror(errno));
}
}
}
xfd->stream.fd = ptyfd;
applyopts(ptyfd, opts, PH_LATE);
if (applyopts_single(&xfd->stream, opts, PH_LATE) < 0) return -1;
#if HAVE_POLL
/* if you can and wish: */
if (wait_slave) {
/* try to wait until someone opens the slave side of the pty */
/* we want to get a HUP (hangup) condition on the pty */
#if HAVE_DEV_PTMX || HAVE_DEV_PTC
if (useptmx) {
ttyfd = Open(tn, O_RDWR|O_NOCTTY, 0620);
Close(ttyfd);
}
#endif
#if HAVE_OPENPTY
if (useopenpty) {
Close(ttyfd);
}
#endif /* HAVE_OPENPTY */
/* now we poll until the HUP vanishes - this indicates a slave conn. */
while (true) {
struct pollfd ufd;
ufd.fd = ptyfd;
ufd.events = (POLLHUP);
if (Poll(&ufd, 1, 0) < 0) {
Error3("poll({%d, 0x%04hu,}, 1, 0): %s",
ufd.fd, ufd.events, strerror(errno));
/*! close something */
return -1;
}
if (!(ufd.revents & POLLHUP)) {
break;
}
Nanosleep(&pollintv, NULL);
continue;
}
}
#endif /* HAVE_POLL */
return STAT_OK;
}
