3 * This file is part of LyX, the document processor.
4 * Licence details can be found in the file COPYING.
6 * \author João Luis M. Assirati
8 * Full author contact details are available in file CREDITS.
13 #include "support/socktools.h"
14 #include "support/FileName.h"
16 #if !defined (HAVE_FCNTL)
17 // We provide stubs because we don't (yet?) support the native OS API.
23 int listen(FileName const &, int)
34 } // namespace socktools
35 } // namespace support
38 #else // defined (HAVE_FCNTL)
40 #include "support/lyxlib.h"
44 #include <sys/socket.h>
56 #ifndef CXX_GLOBAL_CSTD
60 // This MACRO eppears to be defined only on Linux.
63 (sizeof (*(su)) - sizeof ((su)->sun_path) + strlen((su)->sun_path))
71 // Returns a local socket already in the "listen" state (or -1 in case
72 // of error). The first argument is the socket address, the second
73 // is the length of the queue for connections. If successful, a socket
74 // special file 'name' will be created in the filesystem.
75 int listen(FileName const & name, int queue)
77 int fd; // File descriptor for the socket
78 sockaddr_un addr; // Structure that hold the socket address
80 // We use 'localname' to fill 'addr'
81 string const localname = name.toFilesystemEncoding();
82 string::size_type len = localname.size();
83 // the field sun_path in sockaddr_un is a char[108]
85 lyxerr << "lyx: Socket address '" << name.absFilename() << "' too long."
89 // Synonims for AF_UNIX are AF_LOCAL and AF_FILE
90 addr.sun_family = AF_UNIX;
91 localname.copy(addr.sun_path, 107);
92 addr.sun_path[len] = '\0';
94 // This creates a file descriptor for the socket
95 // Synonims for PF_UNIX are PF_LOCAL and PF_FILE
96 // For local sockets, the protocol is always 0
97 // socket() returns -1 in case of error
98 if ((fd = ::socket(PF_UNIX, SOCK_STREAM, 0))== -1) {
99 lyxerr << "lyx: Could not create socket descriptor: "
100 << strerror(errno) << endl;
104 // Set NONBLOCK mode for the file descriptor
105 if (::fcntl(fd, F_SETFL, O_NONBLOCK) == -1) {
106 lyxerr << "lyx: Could not set NONBLOCK mode for socket descriptor: "
107 << strerror(errno) << endl;
112 // bind() gives the local address 'name' for 'fd', also creating
113 // the socket special file in the filesystem. bind() returns -1
115 if ((::bind (fd, reinterpret_cast<sockaddr *>(&addr), SUN_LEN(&addr))) == -1) {
116 lyxerr << "lyx: Could not bind address '" << name.absFilename()
117 << "' to socket descriptor: " << strerror(errno) << endl;
123 // Puts the socket in listen state, that is, ready to accept
124 // connections. The second parameter of listen() defines the
125 // maximum length the queue of pending connections may grow to.
126 // It is not a restriction on the number of connections the socket
127 // can accept. Returns -1 in case of error
128 if (::listen (fd, queue) == -1) {
129 lyxerr << "lyx: Could not put socket in 'listen' state: "
130 << strerror(errno) << endl;
139 // Returns a file descriptor for a new connection from the socket
140 // descriptor 'sd' (or -1 in case of error)
145 // Returns the new file descriptor or -1 in case of error
146 // Using null pointers for the second and third arguments
147 // dismiss all information about the connecting client
148 if ((fd = accept(sd, reinterpret_cast<sockaddr *>(0), reinterpret_cast<socklen_t *>(0))) == -1) {
149 lyxerr << "lyx: Could not accept connection: "
150 << strerror(errno) << endl;
154 // Sets NONBLOCK mode for the file descriptor
155 if (::fcntl(fd, F_SETFL, O_NONBLOCK) == -1) {
156 lyxerr << "lyx: Could not set NONBLOCK mode for connection: "
157 << strerror(errno) << endl;
164 } // namespace socktools
165 } // namespace support
168 #endif // defined (HAVE_FCNTL)