Linux程序设计:关于消息队列 题目：编写两程序，程序1从消息队列接收消息,程序2则发送消息

我的作业,你凑合着用吧

//msgq_send.c

#include <stdio.h>

#include <string.h>

#include <sys/msg.h>

#define MAXSIZE 256

int main(int argc, char *argv[])

{

if (argc <2)

{

printf("Error args\n"漏旦兆)

return -1

}

int msgid

msgid = msgget((key_t)2000, IPC_CREAT | 0644)

if (msgid == -1)

{

printf("msgget error\n")

return -1

}

if (msgsnd(msgid, (void *)argv[1], MAXSIZE, 0) == -1)

{

printf("msgsnd error\n")

return -1

}

return 0

}

//msgq_recv.c

#include <stdio.h>

#include <string.h>

#include <sys/msg.h>

#define MAXSIZE 256

int main(void)

{

int msgid

int msgsize

char buff[MAXSIZE]

msgid = msgget((key_t)2000, IPC_CREAT | 0644)

if (msgid == -1)

{

printf("msgget error\n")

return -1

}

msgsize = msgrcv(msgid, (void *)&buff, MAXSIZE, 0, 0)

if (msgsize == -1)

{

printf("返租迟拿msgrcv error\n")

return -1

}

printf("%s\n", buff)

return 0

}

//Makefile

TARGET := msgq_send msgq_recv

CC := gcc

CFLAGS := -Wall -g

all: msgq_send msgq_recv

msgq_send: msgq_send.o

$(CC) $(CFLAGS) $^ -o $@

msgq_recv: msgq_recv.o

$(CC) $(CFLAGS) $^ -o $@

clean:

rm -fr *.o $(TARGET)

.PHONY :clean

我提供的代野拍码如下，自己补充坦脊键main函数哈，希望能够帮到你：）

//相关头文件：

#include <stdio.h>

#include <signal.h>

#include <stdlib.h>

#include <unistd.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <fcntl.h>

发送方让巧send：

void fifo_pro()

{

char s[128]

int fd

FILE *fp

fp = fopen("./a.txt", "r")

mkfifo("/tmp/fifo.tst", 0644)

fd = open("/tmp/fifo.tst", O_WRONLY)

while(fgets(s, 127, fp) != NULL) {

write(fd, s, strlen(s))

//printf("%s",s)

}

close(fd)

fclose(fp)

unlink("/tmp/fifo.tst")

}

接收方get：

char s[128]

int fd = open("/tmp/fifo.tst", O_RDONLY)

int fd2 = open("./b.txt", O_WRONLY)

memset(s, 0, 128)

while(read(fd, s, 128) >0) {

printf("%s", s)

write(fd2, s, 128)

}

close(fd2)

close(fd)

---