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#include <sys/types.h> #include <unistd.h> #include <sys/stat.h> #include <fcntl.h> #include <stdio.h> int main() { int fd; ssize_t rwcount; off_t fdseek; char rbuff[10]; if ((fd=creat("newfile",0600))==-1) { perror("create error"); return 1; } if ((rwcount=write(fd,"unix",4))==-1) { perror("write error"); return 1; } close(fd); if ((fd=open("newfile",O_RDONLY))==-1) { perror("open error"); return 1; } if ((fdseek=lseek(fd,-1,SEEK_END))==-1) { perror("lseek error"); return 1; } fprintf(stderr,"offset = %d \n",fdseek); if ((rwcount=read(fd,rbuff,1))==-1) { perror("read error"); return 1; } fprintf(stderr,"read count = %d \n",rwcount); if (rwcount>0) { fprintf(stderr,"read buffer = "); write(2,rbuff,rwcount); fprintf(stderr,"\n"); } return 0; }