此程序使用管道在进程之间传递消息。我用。编译
gcc -Wall -o p2 p2.c INIT.DAT LOG.DAT TRANS1 TRANS2
编译后我一直收到这个错误：
/usr/bin/ld:INIT.DAT：文件格式无法识别;作为链接器脚本处理
/usr/bin/ld:INIT.DAT:1：语法错误
使用此源代码：
#include "my.h"
int main(int argc, char **argv)
{
int pipe1[2], pipe2[2], pipe3[2];
int pid[3];
int p;
int len, i, index, check, oneOrTwo;
char val[10];
char buff[MAXLINE];
char strLog[MAXLINE];
char* token;
FILE *log, *trans1, *trans2, *init;
//Create pipes
p = pipe(pipe1);
if(p < 0)
{
printf("pipe error");
exit(0);
}
else
printf("successful pipe1 = %d\n", p);
p = pipe(pipe2);
if(p < 0)
{
printf("pipe error");
exit(0);
}
else
printf("successful pipe2 = %d\n", p);
p = pipe(pipe3);
if(p < 0)
{
printf("pipe error");
exit(0);
}
else
printf("successful pipe3 = %d\n", p);
//Store Manager
pid[0] = fork();
if(pid[0] == 0)
{
//Close unused channels
if(close(pipe1[1]) == -1)
printf("close error closing pipe1[1]\n");
if(close(pipe2[0]) == -1)
printf("close error closing pipe2[0]\n");
if(close(pipe3[0]) == -1)
printf("close error closing pipe3[0]\n");
//open INI.DAT
init = fopen(argv[1], "r");
if(init == NULL)
{
printf("INIT.DAT failed to open");
exit(0);
}
len = 0;
//Gets TABLE size
while(fgets(buff, MAXLINE, init) != NULL)
len++;
struct TABLE table[len];
i = 0;
init = fopen(argv[1], "r");
//Fills table
while(fgets(buff, MAXLINE, init) != NULL)
{
//id
token = strtok(buff, " ");
strcpy(table[i].id, token);
//value
token = strtok(NULL, " ");
table[i].value = atoi(token);
i++;
}
//Opens LOG.DAT
log = fopen(argv[2], "r+");
if(log == NULL)
{
printf("LOG.DAT failed to open");
exit(0);
}
//Send and receive messages
while(1)
{
check = 0;
//Quit when pipe is closed
if(read(pipe1[0], buff, MAXLINE) == -1)
break;
strcpy(strLog, "Store Manager received message: ");
strcat(strLog, buff);
fwrite(strLog, 1, sizeof(strLog), log);
//1 or 2
token = strtok(buff, " ");
oneOrTwo = atoi(token);
//pid
token = strtok(NULL, " ");
//U
token = strtok(NULL, " ");
//Update
if(strcmp(token, "U") == 0)
{
//id
token = strtok(NULL, " ");
for(i = 0; i < len; i++)
{
if(token == table[i].id)
{
check = 1;
index = i;
//value
token = strtok(NULL, " ");
table[i].value += atoi(token);
}
}
//Update failed
if(check == 0)
{
strcpy(strLog, "Store Manager sent message: Error updating table");
fwrite(strLog, 1, sizeof(strLog), log);
if(oneOrTwo == 1)
write(pipe2[1], "Error updating table", MAXLINE);
else
write(pipe3[1], "Error updating table", MAXLINE);
}
//Update succeeded
else
{
strcpy(strLog, "Store Manager sent message: U 0 ");
strcat(strLog, table[index].id);
strcat(strLog, " ");
sprintf(val, "%d", table[index].value);
strcat(strLog, val);
fwrite(strLog, 1, sizeof(strLog), log);
if(oneOrTwo == 1)
write(pipe2[1], strLog, MAXLINE);
else
write(pipe3[1], strLog, MAXLINE);
}
}
//Read
else
{
check = 0;
for(i = 0; i < len; i++)
{
//Read succeeded
if(token == table[i].id)
{
check = 1;
strcpy(strLog, "Store Manager sent message: R ");
sprintf(val, "%d", oneOrTwo);
strcat(strLog, val);
strcat(strLog, " ");
strcat(strLog, table[i].id);
strcat(strLog, " 0");
fwrite(strLog, 1, sizeof(strLog), log);
if(oneOrTwo == 1)
write(pipe2[1], strLog, MAXLINE);
else
write(pipe3[1], strLog, MAXLINE);
}
}
//Read failed
if(check == 0)
{
strcpy(strLog, "Store Manager sent message: Error reading table");
fwrite(strLog, 1, sizeof(strLog), log);
if(oneOrTwo == 1)
write(pipe2[1], "Error reading table", MAXLINE);
else
write(pipe3[1], "Error updareadingting table", MAXLINE);
}
}
}
//Close files and quit process
fclose(init);
fclose(log);
exit(0);
}
//P1
pid[1] = fork();
if(pid[1] == 0)
{
//Close unused channels
if(close(pipe1[0]) == -1)
printf("close error closing pipe1[0]\n");
if(close(pipe2[1]) == -1)
printf("close error closing pipe2[1]\n");
//Open LOG.DAT
log = fopen(argv[2], "r+");
if(log == NULL)
{
printf("LOG.DAT failed to open");
exit(0);
}
//Open TRANS1
trans1 = fopen(argv[3], "r");
if(log == NULL)
{
printf("LOG.DAT failed to open");
exit(0);
}
//Send and receive messages
while(fgets(buff, MAXLINE, trans1) != NULL)
{
strcpy(strLog, "Process 1 sent message: ");
strcat(strLog, buff);
fwrite(strLog, 1, sizeof(strLog), log);
write(pipe1[1], buff, MAXLINE);
read(pipe2[0], buff, MAXLINE);
strcpy(strLog, "Process 1 received message: ");
strcat(strLog, buff);
fwrite(strLog, 1, sizeof(strLog), log);
sleep(3);
}
//Close files and quit process
fclose(trans1);
fclose(log);
exit(0);
}
//P2
pid[2] = fork();
if(pid[2] == 0)
{
//Close unused channels
if(close(pipe1[0]) == -1)
printf("close error closing pipe1[0]\n");
if(close(pipe3[1]) == -1)
printf("close error closing pipe3[1]\n");
//Open LOG.DAT
log = fopen(argv[2], "r+");
if(log == NULL)
{
printf("LOG.DAT failed to open");
exit(0);
}
//Open TRANS2
trans2 = fopen(argv[4], "r");
if(log == NULL)
{
printf("LOG.DAT failed to open");
exit(0);
}
//Send and receive messages
while(fgets(buff, MAXLINE, trans1) != NULL)
{
strcpy(strLog, "Process 1 sent message: ");
strcat(strLog, buff);
fwrite(strLog, 1, sizeof(strLog), log);
write(pipe1[1], buff, MAXLINE);
read(pipe3[0], buff, MAXLINE);
strcpy(strLog, "Process 1 received message: ");
strcat(strLog, buff);
fwrite(strLog, 1, sizeof(strLog), log);
sleep(3);
}
//Close files and quit process
fclose(trans2);
fclose(log);
exit(0);
}
//Wait for processes to quit
for(i = 0; i < 3; i ++)
{
if(waitpid(pid[i], NULL, 0) == -1)
{
printf("waitpid error");
exit(0);
}
}
}
使用这些输入文件：
我
(NOT IN FILE) INIT.DAT
DISNEY 3
INTEL 56
恨
(NOT IN FILE) TRANS1
R XXXX
R DISNEY
此
(NOT IN FILE) TRANS2
R INTEL
U INTEL 45
U DISNEY 21
U DISNEY 21
R DISNEY
U DISNEY 21
U DIY 21
格式化
LOG.DAT is empty.
我不知道为什么我会收到此错误，因为即使我将INIT.DAT更改为INIT.txt或任何其他文件格式，它仍然无法正常工作。它必须是我的代码的问题，但我看不到它。
感谢。