我在一个目录下，find+gzip时，为啥总会报：already has .gz suffix -- unchanged

welcome008

find . -name 'le.*' -mtime +1 -type f -exec gzip {} \;

gzip: ./le.20110107220830.gz already has .gz suffix -- unchanged


当然，我确定在执行之前，该目录下的文件都是没有压缩的。

welcome008

哦，难道说

find+gzip后生成的gz文件，又被find了，然后继续gzip，这样就报错？

xiaopan3322

回复 2# welcome008


    你是想每个文件对应一个包还是把所有的打成一个包

ly5066113

这样试试：
find . -depth -name 'le.*' -mtime +1 -type f -exec gzip {} \;

cjaizss

find . -name 'le.*' -mtime +1 -type f -exec gzip {} \;

gzip: ./le.20110107220830.gz already has . ...
welcome008 发表于 2011-01-10 10:38

    你trace一下就看出来了啊,当然,如果你熟悉UNIX下的C语言编程的话

welcome008

这样试试：
find . -depth -name 'le.*' -mtime +1 -type f -exec gzip {} \;
ly5066113 发表于 2011-01-10 10:47

    我当前目录下没有子目录啊

另，tim把depth的作用说说，貌似不只是对子目录有用的，好像对要查找的目录本身也起作用，如果做删除，甚至可以对要查找的目录本身删除：


mkdir -p testdir/{a,b,c/d}
find testdir  -exec rmdir  {} \;
mkdir -p testdir/{a,b,c/d}
find testdir -depth -exec rmdir  {} \;

xiaopan3322

回复 6# welcome008

-depth
    Process each directory's contents before the directory itself.

-maxdepth levels
    Descend at most levels (a non-negative integer) levels of directories below the command line arguments. `-maxdepth 0' means only apply the tests and actions to the command line arguments.

-mindepth levels
    Do not apply any tests or actions at levels less than levels (a non-negative integer). `-mindepth 1' means process all files except the command line arguments.

welcome008

回复  welcome008

-depth
    Process each directory's contents before the directory itself.

...
xiaopan3322 发表于 2011-01-10 11:06

    貌似不仅仅这样

ly5066113

回复 6# welcome008


就是“深度优先”算法，find默认是“广度优先”的。
对删除很有用，对于你的情况不知道有没有用。

xiaopan3322

貌似不仅仅这样
welcome008 发表于 2011-01-10 11:14

    看下这篇文章：
http://content.hccfl.edu/pollock/unix/findcmd.htm

When using find to locate files for backups, it often pays to use the "-depth" option (really a criterion that is always true), which forces the output to be depth-first—that is, files first and then the directories containing them.  This helps when the directories have restrictive permissions, and restoring the directory first could prevent the files from restoring at all (and would change the time stamp on the directory in any case).  Normally, find returns the directory first, before any of the files in that directory.  This is useful when using the "-prune" action to prevent find from examining any files you want to ignore:

find / -name /dev -prune | xargs tar ...