3 /* File transport - send/receive a bunch of bytes from a file */
5 /* Copyright (c) 2004 Martin Quinson. All rights reserved. */
7 /* This program is free software; you can redistribute it and/or modify it
8 * under the terms of the license (GNU LGPL) which comes with this package. */
11 #include "transport_private.h"
14 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(gras_trp_file,gras_trp,
15 "Pseudo-transport to write to/read from a file");
20 void gras_trp_file_close(gras_socket_t sd);
22 void gras_trp_file_chunk_send_raw(gras_socket_t sd,
24 unsigned long int size);
25 void gras_trp_file_chunk_send(gras_socket_t sd,
27 unsigned long int size,
30 int gras_trp_file_chunk_recv(gras_socket_t sd,
32 unsigned long int size);
35 *** Specific plugin part
39 fd_set incoming_socks;
40 } gras_trp_file_plug_data_t;
43 *** Specific socket part
52 gras_trp_file_setup(gras_trp_plugin_t plug) {
54 gras_trp_file_plug_data_t *file = xbt_new(gras_trp_file_plug_data_t,1);
56 FD_ZERO(&(file->incoming_socks));
58 plug->socket_close = gras_trp_file_close;
60 plug->raw_send = gras_trp_file_chunk_send_raw;
61 plug->send = gras_trp_file_chunk_send;
63 plug->raw_recv = plug->recv = gras_trp_file_chunk_recv;
65 plug->data = (void*)file;
69 * gras_socket_client_from_file:
71 * Create a client socket from a file path.
73 * This only possible in RL, and is mainly for debugging.
76 gras_socket_client_from_file(const char*path) {
79 xbt_assert0(gras_if_RL(),
80 "Cannot use file as socket in the simulator");
82 gras_trp_socket_new(0,&res);
84 res->plugin=gras_trp_plugin_get_by_name("file");
86 if (strcmp("-", path)) {
87 res->sd = open(path, O_WRONLY|O_CREAT | O_BINARY, S_IRUSR|S_IWUSR|S_IRGRP );
90 THROW2(system_error,0,
91 "Cannot create a client socket from file %s: %s",
92 path, strerror(errno));
95 res->sd = 1; /* stdout */
98 DEBUG5("sock_client_from_file(%s): sd=%d in=%c out=%c accept=%c",
101 res->incoming?'y':'n',
102 res->outgoing?'y':'n',
103 res->accepting?'y':'n');
109 * gras_socket_server_from_file:
111 * Create a server socket from a file path.
113 * This only possible in RL, and is mainly for debugging.
115 gras_socket_t gras_socket_server_from_file(const char*path) {
118 xbt_assert0(gras_if_RL(),
119 "Cannot use file as socket in the simulator");
121 gras_trp_socket_new(1,&res);
123 res->plugin=gras_trp_plugin_get_by_name("file");
126 if (strcmp("-", path)) {
127 res->sd = open(path, O_RDONLY | O_BINARY);
130 THROW2(system_error,0,
131 "Cannot create a server socket from file %s: %s",
132 path, strerror(errno));
135 res->sd = 0; /* stdin */
138 DEBUG4("sd=%d in=%c out=%c accept=%c",
140 res->incoming?'y':'n',
141 res->outgoing?'y':'n',
142 res->accepting?'y':'n');
147 void gras_trp_file_close(gras_socket_t sock){
148 gras_trp_file_plug_data_t *data;
150 if (!sock) return; /* close only once */
151 data=sock->plugin->data;
154 DEBUG0("Do not close stdin");
155 } else if (sock->sd == 1) {
156 DEBUG0("Do not close stdout");
158 DEBUG1("close file connection %d", sock->sd);
160 /* forget about the socket */
161 FD_CLR(sock->sd, &(data->incoming_socks));
163 /* close the socket */
164 if(close(sock->sd) < 0) {
165 WARN2("error while closing file %d: %s",
166 sock->sd, strerror(errno));
172 * gras_trp_file_chunk_send:
174 * Send data on a file pseudo-socket
177 gras_trp_file_chunk_send(gras_socket_t sock,
179 unsigned long int size,
180 int stable_ignored) {
181 gras_trp_file_chunk_send_raw(sock,data,size);
184 gras_trp_file_chunk_send_raw(gras_socket_t sock,
186 unsigned long int size) {
188 xbt_assert0(sock->outgoing, "Cannot write on client file socket");
189 xbt_assert0(size >= 0, "Cannot send a negative amount of data");
194 DEBUG3("write(%d, %p, %ld);", sock->sd, data, (long int)size);
195 status = write(sock->sd, data, (long int)size);
198 THROW4(system_error,0,"write(%d,%p,%d) failed: %s",
199 sock->sd, data, (int)size,
207 THROW0(system_error,0,"file descriptor closed");
212 * gras_trp_file_chunk_recv:
214 * Receive data on a file pseudo-socket.
217 gras_trp_file_chunk_recv(gras_socket_t sock,
219 unsigned long int size) {
223 xbt_assert0(sock, "Cannot recv on an NULL socket");
224 xbt_assert0(sock->incoming, "Cannot recv on client file socket");
225 xbt_assert0(size >= 0, "Cannot receive a negative amount of data");
230 status = read(sock->sd, data+got, (long int)size);
231 DEBUG3("read(%d, %p, %ld);", sock->sd, data+got, size);
234 THROW4(system_error,0,"read(%d,%p,%d) failed: %s",
235 sock->sd, data+got, (int)size,
243 THROW0(system_error,0,"file descriptor closed");