在文件末尾添加内容

amazingjxq

#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>

void main()
{
        int fd=open("/home/jxq/tango2.vim",O_APPEND);
        char buff[32]="helloworld";
        //lseek(fd,0,SEEK_END);
        write(fd,buff,10);
}
试了一下怎么不行？如果把O_APPEND改成O_RDWR又能行，这是为什么？

aaaaa5aa

你改成RDWR | O_APPEND试试

openspace

APUE2

O_RDONLY       Open for reading only.
O_WRONLY      Open for writing only.
O_RDWR          Open for reading and writing.

One and only one of these three constants must be specified. The following constants are optional:
O_APPEND       Append to the end of file on each write

……

amazingjxq

原帖由 openspace 于 2009-8-11 17:14 发表
APUE2

O_RDONLY       Open for reading only.
O_WRONLY      Open for writing only.
O_RDWR          Open for reading and writing.

One and only one of these three constants must be specified ...

正解。看得不仔细。