Perl 常用内置函数 -r -e 等

-r: File is readable by effective uid/gid. -w: File is writable by effective uid/gid. -x: File is executable by effective uid/gid. -o: File is owned by effective uid. -R: File is readable by real uid/gid. -W: File is writable by real uid/gid. -X: File is executable by real uid/gid. -O: File is owned by real uid. -e: File exists. -z: File has zero size (is empty). -s: File has nonzero

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-r: File is readable by effective uid/gid.
-w: File is writable by effective uid/gid.
-x: File is executable by effective uid/gid.
-o: File is owned by effective uid.

-R: File is readable by real uid/gid.
-W: File is writable by real uid/gid.
-X: File is executable by real uid/gid.
-O: File is owned by real uid.

-e: File exists.
-z: File has zero size (is empty).
-s: File has nonzero size (returns size in bytes).

-f: File is a plain file.
-d: File is a directory.
-l: File is a symbolic link.
-p: File is a named pipe (FIFO), or Filehandle is a pipe.
-S: File is a socket.
-b: File is a block special file.
-c: File is a character special file.
-t: Filehandle is opened to a tty.

-u: File has setuid bit set.
-g: File has setgid bit set.
-k: File has sticky bit set.

-T: File is an ASCII text file (heuristic guess).
-B: File is a "binary" file (opposite of -T).

-M: Script start time minus file modification time, in days.
-A: Same for access time.
-C: Same for inode change time (Unix, may differ for other platforms)

参考文献


Perl 常用内置函数 -r -e 等
https://www.frytea.com/post/20220111235524.html
作者
Tianlun Song
发布于
2022年1月11日
更新于
2024年6月10日
许可协议