Ejemplo n.º 1
0
/*
 * Processes input from the client and the program.  Input data is stored
 * in buffers and processed later.
 */
static void
process_input(fd_set *readset)
{
	int len;
	char buf[16384];

	/* Read and buffer any input data from the client. */
	if (FD_ISSET(connection_in, readset)) {
		int cont = 0;
		len = roaming_read(connection_in, buf, sizeof(buf), &cont);
		if (len == 0) {
			if (cont)
				return;
			verbose("Connection closed by %.100s",
			    get_remote_ipaddr());
			connection_closed = 1;
			if (compat20)
				return;
			cleanup_exit(255);
		} else if (len < 0) {
			if (errno != EINTR && errno != EAGAIN) {
				verbose("Read error from remote host "
				    "%.100s: %.100s",
				    get_remote_ipaddr(), strerror(errno));
				cleanup_exit(255);
			}
		} else {
			/* Buffer any received data. */
			packet_process_incoming(buf, len);
			fdout_bytes += len;
		}
	}
	if (compat20)
		return;

	/* Read and buffer any available stdout data from the program. */
	if (!fdout_eof && FD_ISSET(fdout, readset)) {
		len = read(fdout, buf, sizeof(buf));
		if (len < 0 && (errno == EINTR || errno == EAGAIN)) {
			/* do nothing */
		} else if (len <= 0) {
			fdout_eof = 1;
		} else {
			buffer_append(&stdout_buffer, buf, len);
			debug ("FD out now: %ld", fdout_bytes);
			fdout_bytes += len;
		}
	}
	/* Read and buffer any available stderr data from the program. */
	if (!fderr_eof && FD_ISSET(fderr, readset)) {
		len = read(fderr, buf, sizeof(buf));
		if (len < 0 && (errno == EINTR || errno == EAGAIN)) {
			/* do nothing */
		} else if (len <= 0) {
			fderr_eof = 1;
		} else {
			buffer_append(&stderr_buffer, buf, len);
		}
	}
}
Ejemplo n.º 2
0
static void
client_process_net_input(fd_set * readset)
{
	int len;
	char buf[8192];

	/*
	 * Read input from the server, and add any such data to the buffer of
	 * the packet subsystem.
	 */
	if (FD_ISSET(connection_in, readset)) {
		/* Read as much as possible. */
		len = read(connection_in, buf, sizeof(buf));
		if (len == 0) {
			/* Received EOF.  The remote host has closed the connection. */
			snprintf(buf, sizeof buf, "Connection to %.300s closed by remote host.\r\n",
				 host);
			buffer_append(&stderr_buffer, buf, strlen(buf));
			quit_pending = 1;
			return;
		}
		/*
		 * There is a kernel bug on Solaris that causes select to
		 * sometimes wake up even though there is no data available.
		 */
		if (len < 0 && (errno == EAGAIN || errno == EINTR))
			len = 0;

		if (len < 0) {
			/* An error has encountered.  Perhaps there is a network problem. */
			snprintf(buf, sizeof buf, "Read from remote host %.300s: %.100s\r\n",
				 host, strerror(errno));
			buffer_append(&stderr_buffer, buf, strlen(buf));
			quit_pending = 1;
			return;
		}
		packet_process_incoming(buf, len);
	}
}
Ejemplo n.º 3
0
/*
 * Processes input from the client and the program.  Input data is stored
 * in buffers and processed later.
 */
static void
process_input(fd_set *readset)
{
	int len;
	char buf[16384];

	/* Read and buffer any input data from the client. */
	if (FD_ISSET(connection_in, readset)) {
		int cont = 0;
		len = roaming_read(connection_in, buf, sizeof(buf), &cont);
		if (len == 0) {
			if (cont)
				return;
			verbose("Connection closed by %.100s",
			    get_remote_ipaddr());
			connection_closed = 1;
			if (compat20)
				return;
			cleanup_exit(255);
		} else if (len < 0) {
			if (errno != EINTR && errno != EAGAIN &&
			    errno != EWOULDBLOCK) {
				verbose("Read error from remote host "
				    "%.100s: %.100s",
				    get_remote_ipaddr(), strerror(errno));
				cleanup_exit(255);
			}
		} else {
			/* Buffer any received data. */
			packet_process_incoming(buf, len);
		}
	}
	if (compat20)
		return;

	/* Read and buffer any available stdout data from the program. */
	if (!fdout_eof && FD_ISSET(fdout, readset)) {
		errno = 0;
		len = read(fdout, buf, sizeof(buf));
		if (len < 0 && (errno == EINTR || ((errno == EAGAIN ||
		    errno == EWOULDBLOCK) && !child_terminated))) {
			/* do nothing */
#ifndef PTY_ZEROREAD
		} else if (len <= 0) {
#else
		} else if ((!isatty(fdout) && len <= 0) ||
		    (isatty(fdout) && (len < 0 || (len == 0 && errno != 0)))) {
#endif
			fdout_eof = 1;
		} else {
			buffer_append(&stdout_buffer, buf, len);
			fdout_bytes += len;
		}
	}
	/* Read and buffer any available stderr data from the program. */
	if (!fderr_eof && FD_ISSET(fderr, readset)) {
		errno = 0;
		len = read(fderr, buf, sizeof(buf));
		if (len < 0 && (errno == EINTR || ((errno == EAGAIN ||
		    errno == EWOULDBLOCK) && !child_terminated))) {
			/* do nothing */
#ifndef PTY_ZEROREAD
		} else if (len <= 0) {
#else
		} else if ((!isatty(fderr) && len <= 0) ||
		    (isatty(fderr) && (len < 0 || (len == 0 && errno != 0)))) {
#endif
			fderr_eof = 1;
		} else {
			buffer_append(&stderr_buffer, buf, len);
		}
	}
}