write_fifo.c

来自「源码包中是我在学习Linux进程间通信时所写的关于五种通信方式（管道」· C语言 代码 · 共 53 行

#include "fifo.h"

/* write data to fifo */

void signal_handler( int s );

int main(int argc, char **argv )
{
        int     fd;
	char 	buffer[BUFFER_SIZE];
	ssize_t n;
	
        if( argc < 2 )
        {
                fprintf( stdout, "Usage:%s <filename>\n",argv[0] );
                exit(1);
        }
	
	signal( SIGPIPE, signal_handler );

	if( (fd = open(argv[1], O_WRONLY)) < 0 )
	{
		fprintf( stderr, "open fifo %s for writting failed: %s\n", argv[1], strerror(errno) );
		exit(1);
	}

	fprintf( stdout, "open fifo %s for writting successed.\n", argv[1] );
	
	while( fgets(buffer, BUFFER_SIZE, stdin) )
	{
		again:
			if( (n = write(fd, buffer, strlen(buffer))) < 0 )
			{
				if( errno == EINTR )
				{
					goto	again;
				}
				else
				{
					fprintf( stderr, "write fifo failed :%s\n", strerror(errno) );
					break;
				}
			}
	}
	return 0;
}

void signal_handler( int s )
{
	fprintf( stdout, "Caught signal %d\n", s );
}