如果写到管道时读进程已终止会产生SIGPIPE---怎么实现？
我在学习SIGPIPE时，按照描述就是：如果写到管道时读进程已终止会产生SIGPIPE。另外还有一个socket也会出这个信号，不过socket这个先不管了。我学习FIFO，就想实现“如果写到管道时读进程已终止会产生SIGPIPE”（注：APUE上写的）。我实现代码如下：#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <unistd.h>
#define FIFO_SERVER "/tmp/myfifo"
void my_func(int sign_no)
{
if(sign_no == SIGPIPE)
{
printf("Sorry Sir,I have get SIGPIPE\n");
}
else
exit(1);
}
int main(int argc, char** argv)
{
int fd;
char w_buf;
int nwrite;
signal(SIGPIPE, my_func);
if((mkfifo(FIFO_SERVER, O_CREAT|O_EXCL|O_RDWR)<0) && (errno!=EEXIST))
{
printf("Cant create fifioserver\n");
}
//fd = creat(FIFO_SERVER,O_RDWR|O_NONBLOCK);
fd = open(FIFO_SERVER, O_RDWR|O_NONBLOCK, 0);
if(fd == -1)
{
perror("open");
exit(1);
}
if(argc == 1)
{
printf("Please send something\n");
exit(-1);
}
strcpy(w_buf, argv);
while(1)
{
nwrite = write(fd, w_buf, 100);
if(nwrite == -1)
{
if(errno == EAGAIN)
printf("The FIFO has not been read yet,Please try later\n");
}
else
{
printf("Write %s to the FIFO\n", w_buf);
}
sleep(1);
}
close(fd);
return 0;
}然后在另一个终端手动删掉/tmp/myfifo这个管道，但是却不行，没有出现SIGPIPE这个信号，谁能帮帮我呀。
页:
[1]