file_access.c~

来自「Solaris下的文件系统编程,sun公司培训用例.」· C~ 代码 · 共 27 行

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>

int main(void)
{
	int file = 0, exit_wait;
	char buffer[10] = {0};
	file = open("test.txt", O_RDONLY);
	printf("The file descriptor returned is %d\n", file);
	if (file == -1)
		{
			printf("The file opening failed.\n");
			exit(0);
		}
	
	read(file, (void*)buffer, 9);
	(char *)buffer[9] = '\0';
	printf("The data read from the file is %s\n", buffer);
	scanf("%d", &exit_wait);/*Make the process blocked here so that the kernel data structure can be inspected.*/
	close (file);
	return 0;
}