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 "gras_simix_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 */
99 DEBUG5("sock_client_from_file(%s): sd=%d in=%c out=%c accept=%c",
102 res->incoming?'y':'n',
103 res->outgoing?'y':'n',
104 res->accepting?'y':'n');
110 * gras_socket_server_from_file:
112 * Create a server socket from a file path.
114 * This only possible in RL, and is mainly for debugging.
116 gras_socket_t gras_socket_server_from_file(const char*path) {
119 xbt_assert0(gras_if_RL(),
120 "Cannot use file as socket in the simulator");
122 gras_trp_socket_new(1,&res);
124 res->plugin=gras_trp_plugin_get_by_name("file");
127 if (strcmp("-", path)) {
128 res->sd = open(path, O_RDONLY | O_BINARY);
131 THROW2(system_error,0,
132 "Cannot create a server socket from file %s: %s",
133 path, strerror(errno));
136 res->sd = 0; /* stdin */
139 DEBUG4("sd=%d in=%c out=%c accept=%c",
141 res->incoming?'y':'n',
142 res->outgoing?'y':'n',
143 res->accepting?'y':'n');
149 void gras_trp_file_close(gras_socket_t sock){
150 gras_trp_file_plug_data_t *data;
152 if (!sock) return; /* close only once */
153 data=sock->plugin->data;
156 DEBUG0("Do not close stdin");
157 } else if (sock->sd == 1) {
158 DEBUG0("Do not close stdout");
160 DEBUG1("close file connection %d", sock->sd);
162 /* forget about the socket */
163 FD_CLR(sock->sd, &(data->incoming_socks));
165 /* close the socket */
166 if(close(sock->sd) < 0) {
167 WARN2("error while closing file %d: %s",
168 sock->sd, strerror(errno));
174 * gras_trp_file_chunk_send:
176 * Send data on a file pseudo-socket
179 gras_trp_file_chunk_send(gras_socket_t sock,
181 unsigned long int size,
182 int stable_ignored) {
183 gras_trp_file_chunk_send_raw(sock,data,size);
186 gras_trp_file_chunk_send_raw(gras_socket_t sock,
188 unsigned long int size) {
190 xbt_assert0(sock->outgoing, "Cannot write on client file socket");
191 xbt_assert0(size >= 0, "Cannot send a negative amount of data");
196 DEBUG3("write(%d, %p, %ld);", sock->sd, data, (long int)size);
197 status = write(sock->sd, data, (long int)size);
200 THROW4(system_error,0,"write(%d,%p,%d) failed: %s",
201 sock->sd, data, (int)size,
209 THROW0(system_error,0,"file descriptor closed");
214 * gras_trp_file_chunk_recv:
216 * Receive data on a file pseudo-socket.
219 gras_trp_file_chunk_recv(gras_socket_t sock,
221 unsigned long int size) {
225 xbt_assert0(sock, "Cannot recv on an NULL socket");
226 xbt_assert0(sock->incoming, "Cannot recv on client file socket");
227 xbt_assert0(size >= 0, "Cannot receive a negative amount of data");
232 status = read(sock->sd, data+got, (long int)size);
233 DEBUG3("read(%d, %p, %ld);", sock->sd, data+got, size);
236 THROW4(system_error,0,"read(%d,%p,%d) failed: %s",
237 sock->sd, data+got, (int)size,
245 THROW0(system_error,0,"file descriptor closed");