Chinaunix首页 | 论坛 | 博客
  • 博客访问: 1046854
  • 博文数量: 162
  • 博客积分: 3887
  • 博客等级: 中校
  • 技术积分: 1617
  • 用 户 组: 普通用户
  • 注册时间: 2010-05-06 19:05
文章分类

全部博文(162)

文章存档

2015年(4)

2014年(7)

2013年(10)

2012年(16)

2011年(89)

2010年(36)

分类:

2010-08-18 17:31:19

此帖摘自他人,供他人学习之用!
Conditional Logic on Files
方法:if [ -f 文件 ]  判断文件是否存在,记得要设置正确的文件路径!
       then
       ................
       fi

-a file exists.
-b file exists and is a block special file.
-c file exists and is a character special file.
-d file exists and is a directory.
-e file exists (just the same as -a).
-f file exists and is a regular file.
-g file exists and has its setgid(2) bit set.
-G file exists and has the same group ID as this process.
-k file exists and has its sticky bit set.
-L file exists and is a symbolic link.
-n string length is not zero.
-o Named option is set on.
-O file exists and is owned by the user ID of this process.
-p file exists and is a first in, first out (FIFO) special file or
named pipe.
-r file exists and is readable by the current process.
-s file exists and has a size greater than zero.
-S file exists and is a socket.
-t file descriptor number fildes is open and associated with a
terminal device.
-u file exists and has its setuid(2) bit set.
-w file exists and is writable by the current process.
-x file exists and is executable by the current process.
-z string length is zero.
阅读(1337) | 评论(0) | 转发(0) |
给主人留下些什么吧!~~