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/Transport/transport_private.h"
13 #include "gras/Msg/msg_interface.h" /* gras_msg_listener_awake */
15 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(gras_trp_file, gras_trp,
16 "Pseudo-transport to write to/read from a file");
21 void gras_trp_file_close(gras_socket_t sd);
23 void gras_trp_file_chunk_send_raw(gras_socket_t sd,
24 const char *data, unsigned long int size);
25 void gras_trp_file_chunk_send(gras_socket_t sd,
27 unsigned long int size, int stable_ignored);
29 int gras_trp_file_chunk_recv(gras_socket_t sd,
30 char *data, unsigned long int size);
33 *** Specific plugin part
37 fd_set incoming_socks;
38 } gras_trp_file_plug_data_t;
41 *** Specific socket part
49 void gras_trp_file_setup(gras_trp_plugin_t plug)
52 gras_trp_file_plug_data_t *file = xbt_new(gras_trp_file_plug_data_t, 1);
54 FD_ZERO(&(file->incoming_socks));
56 plug->socket_close = gras_trp_file_close;
58 plug->raw_send = gras_trp_file_chunk_send_raw;
59 plug->send = gras_trp_file_chunk_send;
61 plug->raw_recv = plug->recv = gras_trp_file_chunk_recv;
63 plug->data = (void *) file;
67 * gras_socket_client_from_file:
69 * Create a client socket from a file path.
71 * This only possible in RL, and is mainly for debugging.
73 gras_socket_t gras_socket_client_from_file(const char *path)
77 xbt_assert0(gras_if_RL(), "Cannot use file as socket in the simulator");
79 gras_trp_socket_new(0, &res);
81 res->plugin = gras_trp_plugin_get_by_name("file");
83 if (strcmp("-", path)) {
85 open(path, O_TRUNC | O_WRONLY | O_CREAT | O_BINARY,
86 S_IRUSR | S_IWUSR | S_IRGRP);
89 THROW2(system_error, 0,
90 "Cannot create a client socket from file %s: %s",
91 path, strerror(errno));
94 res->sd = 1; /* stdout */
97 DEBUG5("sock_client_from_file(%s): sd=%d in=%c out=%c accept=%c",
100 res->incoming ? 'y' : 'n',
101 res->outgoing ? 'y' : 'n', res->accepting ? 'y' : 'n');
103 xbt_dynar_push(((gras_trp_procdata_t)
104 gras_libdata_by_id(gras_trp_libdata_id))->sockets, &res);
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)
119 xbt_assert0(gras_if_RL(), "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', res->accepting ? 'y' : 'n');
143 xbt_dynar_push(((gras_trp_procdata_t)
144 gras_libdata_by_id(gras_trp_libdata_id))->sockets, &res);
145 gras_msg_listener_awake();
149 void gras_trp_file_close(gras_socket_t sock)
151 gras_trp_file_plug_data_t *data;
154 return; /* close only once */
155 data = sock->plugin->data;
158 DEBUG0("Do not close stdin");
159 } else if (sock->sd == 1) {
160 DEBUG0("Do not close stdout");
162 DEBUG1("close file connection %d", sock->sd);
164 /* forget about the socket */
165 FD_CLR(sock->sd, &(data->incoming_socks));
167 /* close the socket */
168 if (close(sock->sd) < 0) {
169 WARN2("error while closing file %d: %s", sock->sd, strerror(errno));
175 * gras_trp_file_chunk_send:
177 * Send data on a file pseudo-socket
180 gras_trp_file_chunk_send(gras_socket_t sock,
182 unsigned long int size, int stable_ignored)
184 gras_trp_file_chunk_send_raw(sock, data, size);
188 gras_trp_file_chunk_send_raw(gras_socket_t sock,
189 const char *data, unsigned long int size)
192 xbt_assert0(sock->outgoing, "Cannot write on client file socket");
193 xbt_assert0(size >= 0, "Cannot send a negative amount of data");
198 DEBUG3("write(%d, %p, %ld);", sock->sd, data, (long int) size);
199 status = write(sock->sd, data, (long int) size);
202 THROW4(system_error, 0, "write(%d,%p,%d) failed: %s",
203 sock->sd, data, (int) size, strerror(errno));
210 THROW0(system_error, 0, "file descriptor closed");
216 * gras_trp_file_chunk_recv:
218 * Receive data on a file pseudo-socket.
221 gras_trp_file_chunk_recv(gras_socket_t sock,
222 char *data, unsigned long int size)
227 xbt_assert0(sock, "Cannot recv on an NULL socket");
228 xbt_assert0(sock->incoming, "Cannot recv on client file socket");
229 xbt_assert0(size >= 0, "Cannot receive a negative amount of data");
232 data[0] = sock->recvd_val;
241 status = read(sock->sd, data + got, (long int) size);
242 DEBUG3("read(%d, %p, %ld);", sock->sd, data + got, size);
245 THROW4(system_error, 0, "read(%d,%p,%d) failed: %s",
246 sock->sd, data + got, (int) size, strerror(errno));
253 THROW1(system_error, errno, "file descriptor closed after %d bytes",