# include <sys/wait.h>
#endif
+#ifdef HAS_SELECT
+# ifdef I_SYS_SELECT
+# include <sys/select.h>
+# endif
+#endif
+
#define FLUSH
#ifdef LEAKTEST
If FBMcf_TAIL, the table is created as if the string has a trailing \n. */
/*
+=head1 Miscellaneous Functions
+
=for apidoc fbm_compile
Analyses the string in order to make fast searches on it using fbm_instr()
/* copy a string to a safe spot */
/*
+=head1 Memory Management
+
=for apidoc savepv
Copy a string to a safe spot. This does not use an SV.
char *
Perl_savepv(pTHX_ const char *sv)
{
- register char *newaddr;
-
- New(902,newaddr,strlen(sv)+1,char);
- (void)strcpy(newaddr,sv);
+ register char *newaddr = sv;
+ if (sv) {
+ New(902,newaddr,strlen(sv)+1,char);
+ (void)strcpy(newaddr,sv);
+ }
return newaddr;
}
return newaddr;
}
+/*
+=for apidoc savesharedpv
+
+Copy a string to a safe spot in memory shared between threads.
+This does not use an SV.
+
+=cut
+*/
+char *
+Perl_savesharedpv(pTHX_ const char *sv)
+{
+ register char *newaddr = sv;
+ if (sv) {
+ newaddr = PerlMemShared_malloc(strlen(sv)+1);
+ (void)strcpy(newaddr,sv);
+ }
+ return newaddr;
+}
+
+
+
/* the SV for Perl_form() and mess() is not kept in an arena */
STATIC SV *
}
#endif /* PERL_IMPLICIT_CONTEXT */
+/*
+=head1 Miscellaneous Functions
+=for apidoc form
+
+Takes a sprintf-style format pattern and conventional
+(non-SV) arguments and returns the formatted string.
+
+ (char *) Perl_form(pTHX_ const char* pat, ...)
+
+can be used any place a string (char *) is required:
+
+ char * s = Perl_form("%d.%d",major,minor);
+
+Uses a single private buffer so if you want to format several strings you
+must explicitly copy the earlier strings away (and free the copies when you
+are done).
+
+=cut
+*/
+
char *
Perl_form(pTHX_ const char* pat, ...)
{
#endif /* PERL_IMPLICIT_CONTEXT */
/*
+=head1 Warning and Dieing
+
=for apidoc croak
This is the XSUB-writer's interface to Perl's C<die> function.
(dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
/*
+=head1 Miscellaneous Functions
+
=for apidoc getcwd_sv
Fill the sv with current working directory
}
/*
+=head1 SV Manipulation Functions
+
=for apidoc new_vstring
Returns a pointer to the next character after the parsed
vstring, as well as updating the passed in sv.
- *
+
Function must be called like
-
+
sv = NEWSV(92,5);
s = new_vstring(s,sv);
return s;
}
+#if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET)
+static int
+S_socketpair_udp (int fd[2]) {
+ dTHX;
+ /* Fake a datagram socketpair using UDP to localhost. */
+ int sockets[2] = {-1, -1};
+ struct sockaddr_in addresses[2];
+ int i;
+ Sock_size_t size = sizeof (struct sockaddr_in);
+ unsigned short port;
+ int got;
+
+ memset (&addresses, 0, sizeof (addresses));
+ i = 1;
+ do {
+ sockets[i] = PerlSock_socket (AF_INET, SOCK_DGRAM, PF_INET);
+ if (sockets[i] == -1)
+ goto tidy_up_and_fail;
+
+ addresses[i].sin_family = AF_INET;
+ addresses[i].sin_addr.s_addr = htonl (INADDR_LOOPBACK);
+ addresses[i].sin_port = 0; /* kernel choses port. */
+ if (PerlSock_bind (sockets[i], (struct sockaddr *) &addresses[i],
+ sizeof (struct sockaddr_in))
+ == -1)
+ goto tidy_up_and_fail;
+ } while (i--);
+
+ /* Now have 2 UDP sockets. Find out which port each is connected to, and
+ for each connect the other socket to it. */
+ i = 1;
+ do {
+ if (PerlSock_getsockname (sockets[i], (struct sockaddr *) &addresses[i], &size)
+ == -1)
+ goto tidy_up_and_fail;
+ if (size != sizeof (struct sockaddr_in))
+ goto abort_tidy_up_and_fail;
+ /* !1 is 0, !0 is 1 */
+ if (PerlSock_connect(sockets[!i], (struct sockaddr *) &addresses[i],
+ sizeof (struct sockaddr_in)) == -1)
+ goto tidy_up_and_fail;
+ } while (i--);
+
+ /* Now we have 2 sockets connected to each other. I don't trust some other
+ process not to have already sent a packet to us (by random) so send
+ a packet from each to the other. */
+ i = 1;
+ do {
+ /* I'm going to send my own port number. As a short.
+ (Who knows if someone somewhere has sin_port as a bitfield and needs
+ this routine. (I'm assuming crays have socketpair)) */
+ port = addresses[i].sin_port;
+ got = PerlLIO_write (sockets[i], &port, sizeof(port));
+ if (got != sizeof(port)) {
+ if (got == -1)
+ goto tidy_up_and_fail;
+ goto abort_tidy_up_and_fail;
+ }
+ } while (i--);
+
+ /* Packets sent. I don't trust them to have arrived though.
+ (As I understand it Solaris TCP stack is multithreaded. Non-blocking
+ connect to localhost will use a second kernel thread. In 2.6 the
+ first thread running the connect() returns before the second completes,
+ so EINPROGRESS> In 2.7 the improved stack is faster and connect()
+ returns 0. Poor programs have tripped up. One poor program's authors'
+ had a 50-1 reverse stock split. Not sure how connected these were.)
+ So I don't trust someone not to have an unpredictable UDP stack.
+ */
+
+ {
+ struct timeval waitfor = {0, 100000}; /* You have 0.1 seconds */
+ int max = sockets[1] > sockets[0] ? sockets[1] : sockets[0];
+ fd_set rset;
+
+ FD_ZERO (&rset);
+ FD_SET (sockets[0], &rset);
+ FD_SET (sockets[1], &rset);
+
+ got = PerlSock_select (max + 1, &rset, NULL, NULL, &waitfor);
+ if (got != 2 || !FD_ISSET (sockets[0], &rset)
+ || !FD_ISSET (sockets[1], &rset)) {
+ /* I hope this is portable and appropriate. */
+ if (got == -1)
+ goto tidy_up_and_fail;
+ goto abort_tidy_up_and_fail;
+ }
+ }
+
+ /* And the paranoia department even now doesn't trust it to have arrive
+ (hence MSG_DONTWAIT). Or that what arrives was sent by us. */
+ {
+ struct sockaddr_in readfrom;
+ unsigned short buffer[2];
+
+ i = 1;
+ do {
+#ifdef MSG_DONTWAIT
+ got = PerlSock_recvfrom (sockets[i], (char *) &buffer, sizeof(buffer),
+ MSG_DONTWAIT,
+ (struct sockaddr *) &readfrom, &size);
+#else
+ got = PerlSock_recvfrom (sockets[i], (char *) &buffer, sizeof(buffer),
+ 0,
+ (struct sockaddr *) &readfrom, &size);
+#endif
+
+ if (got == -1)
+ goto tidy_up_and_fail;
+ if (got != sizeof(port)
+ || size != sizeof (struct sockaddr_in)
+ /* Check other socket sent us its port. */
+ || buffer[0] != (unsigned short) addresses[!i].sin_port
+ /* Check kernel says we got the datagram from that socket. */
+ || readfrom.sin_family != addresses[!i].sin_family
+ || readfrom.sin_addr.s_addr != addresses[!i].sin_addr.s_addr
+ || readfrom.sin_port != addresses[!i].sin_port)
+ goto abort_tidy_up_and_fail;
+ } while (i--);
+ }
+ /* My caller (my_socketpair) has validated that this is non-NULL */
+ fd[0] = sockets[0];
+ fd[1] = sockets[1];
+ /* I hereby declare this connection open. May God bless all who cross
+ her. */
+ return 0;
+
+ abort_tidy_up_and_fail:
+ errno = ECONNABORTED;
+ tidy_up_and_fail:
+ {
+ int save_errno = errno;
+ if (sockets[0] != -1)
+ PerlLIO_close (sockets[0]);
+ if (sockets[1] != -1)
+ PerlLIO_close (sockets[1]);
+ errno = save_errno;
+ return -1;
+ }
+}
+
+int
+Perl_my_socketpair (int family, int type, int protocol, int fd[2]) {
+ /* Stevens says that family must be AF_LOCAL, protocol 0.
+ I'm going to enforce that, then ignore it, and use TCP (or UDP). */
+ dTHX;
+ int listener = -1;
+ int connector = -1;
+ int acceptor = -1;
+ struct sockaddr_in listen_addr;
+ struct sockaddr_in connect_addr;
+ Sock_size_t size;
+
+ if (protocol
+#ifdef AF_UNIX
+ || family != AF_UNIX
+#endif
+ ) {
+ errno = EAFNOSUPPORT;
+ return -1;
+ }
+ if (!fd) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (type == SOCK_DGRAM)
+ return S_socketpair_udp (fd);
+
+ listener = PerlSock_socket (AF_INET, type, 0);
+ if (listener == -1)
+ return -1;
+ memset (&listen_addr, 0, sizeof (listen_addr));
+ listen_addr.sin_family = AF_INET;
+ listen_addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
+ listen_addr.sin_port = 0; /* kernel choses port. */
+ if (PerlSock_bind (listener, (struct sockaddr *) &listen_addr, sizeof (listen_addr))
+ == -1)
+ goto tidy_up_and_fail;
+ if (PerlSock_listen(listener, 1) == -1)
+ goto tidy_up_and_fail;
+
+ connector = PerlSock_socket (AF_INET, type, 0);
+ if (connector == -1)
+ goto tidy_up_and_fail;
+ /* We want to find out the port number to connect to. */
+ size = sizeof (connect_addr);
+ if (PerlSock_getsockname (listener, (struct sockaddr *) &connect_addr, &size) == -1)
+ goto tidy_up_and_fail;
+ if (size != sizeof (connect_addr))
+ goto abort_tidy_up_and_fail;
+ if (PerlSock_connect(connector, (struct sockaddr *) &connect_addr,
+ sizeof (connect_addr)) == -1)
+ goto tidy_up_and_fail;
+
+ size = sizeof (listen_addr);
+ acceptor = PerlSock_accept (listener, (struct sockaddr *) &listen_addr, &size);
+ if (acceptor == -1)
+ goto tidy_up_and_fail;
+ if (size != sizeof (listen_addr))
+ goto abort_tidy_up_and_fail;
+ PerlLIO_close (listener);
+ /* Now check we are talking to ourself by matching port and host on the
+ two sockets. */
+ if (PerlSock_getsockname (connector, (struct sockaddr *) &connect_addr, &size) == -1)
+ goto tidy_up_and_fail;
+ if (size != sizeof (connect_addr)
+ || listen_addr.sin_family != connect_addr.sin_family
+ || listen_addr.sin_addr.s_addr != connect_addr.sin_addr.s_addr
+ || listen_addr.sin_port != connect_addr.sin_port) {
+ goto abort_tidy_up_and_fail;
+ }
+ fd[0] = connector;
+ fd[1] = acceptor;
+ return 0;
+
+ abort_tidy_up_and_fail:
+ errno = ECONNABORTED; /* I hope this is portable and appropriate. */
+ tidy_up_and_fail:
+ {
+ int save_errno = errno;
+ if (listener != -1)
+ PerlLIO_close (listener);
+ if (connector != -1)
+ PerlLIO_close (connector);
+ if (acceptor != -1)
+ PerlLIO_close (acceptor);
+ errno = save_errno;
+ return -1;
+ }
+}
+#endif /* !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) */
+#ifdef HAS_SOCKETPAIR
+/* In any case have a stub so that there's code corresponding
+ * to the my_socketpair in global.sym. */
+int
+Perl_my_socketpair (int family, int type, int protocol, int fd[2]) {
+ return socketpair(family, type, protocol, fd);
+}
+#endif
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