質問編集履歴
4
完成版の更新方法を誤っていました。
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```
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お二人にご指摘いただいた点をもとに修正し、無事に動かすことができましたので更新します。
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#include <stdlib.h>
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#include
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#include <string.h>
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#include <sys/types.h>
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#include <errno.h>
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#define KEY 2020
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printf("
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typedef struct{
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long mtype;
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int send_size;
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char image[1024];
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}DATA;
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int main()
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{
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DATA data;
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data.send_size=0;
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char mtext[256];
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int msgid;
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FILE *fp;
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extern int errno;
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if((msgid=msgget(KEY,0666|IPC_CREAT))==-1){
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printf("MsgGet Error=%d\n",errno);
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exit(EXIT_FAILURE);
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}
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if((fp=fopen("gazou.png","rb"))==NULL){
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printf("ファイルが開けませんでした");
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exit(EXIT_FAILURE);
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}
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while(feof(fp)==0){
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data.send_size=fread(&data.image,1,1024,fp);
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printf("%d\n",data.send_size);
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printf("%ld\n",sizeof(data)-sizeof(long));
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printf("msgid:%d\n",msgid);
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if(msgsnd(msgid,&data,data.send_size+sizeof(int),0)==-1){
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printf("errno=%d\n",errno);
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perror(mtext);
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fputs(mtext,stdout);
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exit(EXIT_FAILURE);
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}
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}
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fclose(fp);
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exit(EXIT_FAILURE);
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}
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```C言語（メッセージ受信側）
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/ipc.h>
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#include <sys/msg.h>
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#include <errno.h>
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#define KEY 2020
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typedef struct{
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long mtype;
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int send_size;
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char image[1024];
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}DATA;
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int main(int argc,char* argv[])
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{
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int status=EXIT_FAILURE;
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int msgid;
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extern int errno;
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DATA data;
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FILE *fp;
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char mmtext[256];
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data.send_size=0;
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if((fp=fopen("gazou2.png","wb"))==NULL){
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printf("ファイルが開けませんでした");
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exit(EXIT_FAILURE);
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}
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if((msgid=msgget(KEY,0666|IPC_CREAT))==-1){
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printf("MsgGet Error=%d\n",errno);
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exit(status);
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}
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while(1){
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if(msgrcv(msgid,&data,sizeof(data)-sizeof(long),0,0)==-1){
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printf("recieve error=%d\n",errno);
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perror(mmtext);
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exit(EXIT_FAILURE);
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}
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fwrite(&data.image,1,data.send_size,fp);
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printf("data.send_size=%d\n",data.send_size);
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if(data.send_size<1024){
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break;
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}
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}
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printf("書込み終了\n");
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fclose(fp);
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exit(EXIT_SUCCESS);
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}
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```
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```C言語（メッセージ受信側）
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138
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-
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139
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#include <stdio.h>
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140
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-
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141
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#include <string.h>
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142
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-
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143
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#include <stdlib.h>
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144
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145
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#include <sys/types.h>
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146
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-
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147
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#include <sys/ipc.h>
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149
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#include <sys/msg.h>
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150
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-
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151
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#include <errno.h>
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152
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-
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153
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#define KEY 2020
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156
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158
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159
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int main(int argc,char* argv[])
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161
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{
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FILE *fp=NULL;
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int msgid;
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int no;
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typedef struct{
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long mtype;
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int send_size;
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177
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char data[1024];
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178
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-
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179
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} DATA;
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-
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DATA data;
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183
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int status=EXIT_FAILURE;
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struct msgbuff{
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long mtype;
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192
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-
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193
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char mtext[80];
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194
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-
|
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195
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}b;
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-
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extern int errno;
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data.send_size=0;
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if((fp=fopen("gazou","wb"))==NULL){
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-
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207
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printf("ファイルが開けませんでした");
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-
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exit(EXIT_FAILURE);
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}
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if(argc<2){
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printf("Argument required.\n");
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exit(status);
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}
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printf("Recieve %d Start.\n",no=atoi(argv[1]));
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if((msgid=msgget(KEY,0666|IPC_CREAT))==-1){
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printf("MsgGet Error=%d\n",errno);
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exit(status);
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-
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}
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while(1){
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240
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-
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241
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-
if(msgrcv(msgid,&data,sizeof(data)-sizeof(long),0,0)==-1){
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242
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-
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|
243
|
-
data.send_size=fwrite(&data,1,data.send_size,fp);
|
|
244
|
-
|
|
245
|
-
if(errno==ENOMSG){
|
|
246
|
-
|
|
247
|
-
printf("Receive %d End. \n",no);
|
|
248
|
-
|
|
249
|
-
status=EXIT_SUCCESS;
|
|
250
|
-
|
|
251
|
-
}else{
|
|
252
|
-
|
|
253
|
-
printf("MsgRcv Error=%d\n",errno);
|
|
254
|
-
|
|
255
|
-
status=EXIT_FAILURE;
|
|
256
|
-
|
|
257
|
-
}
|
|
258
|
-
|
|
259
|
-
break;
|
|
260
|
-
|
|
261
|
-
}
|
|
262
|
-
|
|
263
|
-
printf("Receive%2d:",no);
|
|
264
|
-
|
|
265
|
-
fputs(b.mtext,stdout);
|
|
266
|
-
|
|
267
|
-
}
|
|
268
|
-
|
|
269
|
-
exit(status);
|
|
270
|
-
|
|
271
|
-
}
|
|
272
|
-
|
|
273
|
-
|
|
274
|
-
|
|
275
|
-
```
|
|
276
|
-
|
|
277
273
|
|
|
278
274
|
|
|
279
275
|
Linuxのubuntu上で開発しています。
|
2
SHOMI様の追記をもとに編集してみました。
test
CHANGED
|
File without changes
|
test
CHANGED
|
@@ -236,13 +236,13 @@
|
|
|
236
236
|
|
|
237
237
|
|
|
238
238
|
|
|
239
|
-
while(
|
|
239
|
+
while(1){
|
|
240
240
|
|
|
241
241
|
if(msgrcv(msgid,&data,sizeof(data)-sizeof(long),0,0)==-1){
|
|
242
242
|
|
|
243
|
-
data.send_size=fwrite(&data,1,
|
|
243
|
+
data.send_size=fwrite(&data,1,data.send_size,fp);
|
|
244
|
-
|
|
244
|
+
|
|
245
|
-
if(errno=ENOMSG){
|
|
245
|
+
if(errno==ENOMSG){
|
|
246
246
|
|
|
247
247
|
printf("Receive %d End. \n",no);
|
|
248
248
|
|
1
ご指摘いただいた点のコードを修正してみました。ただ、送信側を実行するとMsgsndError=22と表示されます。システムコールだと思いますが調べても対処法が見つけられずわかっていないです。
test
CHANGED
|
File without changes
|
test
CHANGED
|
@@ -68,9 +68,15 @@
|
|
|
68
68
|
|
|
69
69
|
DATA data;
|
|
70
70
|
|
|
71
|
-
mtype=0;
|
|
71
|
+
data.mtype=0;
|
|
72
|
-
|
|
72
|
+
|
|
73
|
-
|
|
73
|
+
data.send_size=0;
|
|
74
|
+
|
|
75
|
+
|
|
76
|
+
|
|
77
|
+
|
|
78
|
+
|
|
79
|
+
|
|
74
80
|
|
|
75
81
|
|
|
76
82
|
|
|
@@ -96,9 +102,9 @@
|
|
|
96
102
|
|
|
97
103
|
while(feof(fp)==0){
|
|
98
104
|
|
|
99
|
-
send_size=fread(&data,1,1024,fp);
|
|
105
|
+
data.send_size=fread(&data.data,1,1024,fp);
|
|
100
|
-
|
|
106
|
+
|
|
101
|
-
if(msgsnd(msgid,&data,send_size+sizeof(
|
|
107
|
+
if(msgsnd(msgid,&data,data.send_size+sizeof(int),0)==-1){
|
|
102
108
|
|
|
103
109
|
printf("MsgSnd Error=%d\n",errno);
|
|
104
110
|
|
|
@@ -190,6 +196,10 @@
|
|
|
190
196
|
|
|
191
197
|
extern int errno;
|
|
192
198
|
|
|
199
|
+
|
|
200
|
+
|
|
201
|
+
data.send_size=0;
|
|
202
|
+
|
|
193
203
|
|
|
194
204
|
|
|
195
205
|
if((fp=fopen("gazou","wb"))==NULL){
|
|
@@ -226,11 +236,11 @@
|
|
|
226
236
|
|
|
227
237
|
|
|
228
238
|
|
|
229
|
-
while(send_size<1024){
|
|
239
|
+
while(data.send_size<=1024){
|
|
230
|
-
|
|
231
|
-
|
|
240
|
+
|
|
232
|
-
|
|
233
|
-
if(msgrcv(msgid,&data,sizeof(data)-sizeof(long),0,0)==-1){
|
|
241
|
+
if(msgrcv(msgid,&data,sizeof(data)-sizeof(long),0,0)==-1){
|
|
242
|
+
|
|
243
|
+
data.send_size=fwrite(&data,1,1024,fp);
|
|
234
244
|
|
|
235
245
|
if(errno=ENOMSG){
|
|
236
246
|
|