Re: Bash script problem
On Fri 06 Aug 2021 at 09:30:17 (+1000), David wrote:
> On Fri, 6 Aug 2021 at 06:03, Gary L. Roach <garyroach719@gmail.com> wrote:
>
> > Second, why am I separating out the Path the way I am doing? I need to
> > check each level for existence then, if the level doesn't exist, create
> > the directory, cd to the directory, set chown and -x chmod. After that
> > check the next level and repeat the process until I run out of levels.
> > There are other things that need to be done with files that are similar.
>
> It sounds like you are unaware of 'mkdir -p' and 'chown -R'.
> They are the standard tools for this kind of task.
>
> 'chmod -R' is less useful because it does not discriminate
> between files and directories, I never understood why it
> does not offer that option, because usually we need all file
> permissions to not be the same as all directory permissions.
?
I thought that was what X is for. A demonstration:
1. Create a tree of directories and files, making them
available only to the user:
$ mkdir -p temp/tree/{a,b} temp/tree/{a/{p,q,r},b/{x,y,z}}
$ touch temp/tree/{a,b}/text temp/tree/{a/{p,q,r},b/{x,y,z}}/text
$ chmod -R go= temp/tree
$ ls -GlgR temp/tree | grep -v total
temp/tree:
drwx------ 5 4096 Aug 5 21:55 a
drwx------ 5 4096 Aug 5 21:55 b
temp/tree/a:
drwx------ 2 4096 Aug 5 21:55 p
drwx------ 2 4096 Aug 5 21:55 q
drwx------ 2 4096 Aug 5 21:55 r
-rw------- 1 0 Aug 5 21:55 text
temp/tree/a/p:
-rw------- 1 0 Aug 5 21:55 text
temp/tree/a/q:
-rw------- 1 0 Aug 5 21:55 text
temp/tree/a/r:
-rw------- 1 0 Aug 5 21:55 text
temp/tree/b:
-rw------- 1 0 Aug 5 21:55 text
drwx------ 2 4096 Aug 5 21:55 x
drwx------ 2 4096 Aug 5 21:55 y
drwx------ 2 4096 Aug 5 21:55 z
temp/tree/b/x:
-rw------- 1 0 Aug 5 21:55 text
temp/tree/b/y:
-rw------- 1 0 Aug 5 21:55 text
temp/tree/b/z:
-rw------- 1 0 Aug 5 21:55 text
$
2. Now use X to make them readable for all:
$ chmod -R a+rX temp/tree
$ ls -GlgR temp/tree | grep -v total
temp/tree:
drwxr-xr-x 5 4096 Aug 5 21:55 a
drwxr-xr-x 5 4096 Aug 5 21:55 b
temp/tree/a:
drwxr-xr-x 2 4096 Aug 5 21:55 p
drwxr-xr-x 2 4096 Aug 5 21:55 q
drwxr-xr-x 2 4096 Aug 5 21:55 r
-rw-r--r-- 1 0 Aug 5 21:55 text
temp/tree/a/p:
-rw-r--r-- 1 0 Aug 5 21:55 text
temp/tree/a/q:
-rw-r--r-- 1 0 Aug 5 21:55 text
temp/tree/a/r:
-rw-r--r-- 1 0 Aug 5 21:55 text
temp/tree/b:
-rw-r--r-- 1 0 Aug 5 21:55 text
drwxr-xr-x 2 4096 Aug 5 21:55 x
drwxr-xr-x 2 4096 Aug 5 21:55 y
drwxr-xr-x 2 4096 Aug 5 21:55 z
temp/tree/b/x:
-rw-r--r-- 1 0 Aug 5 21:55 text
temp/tree/b/y:
-rw-r--r-- 1 0 Aug 5 21:55 text
temp/tree/b/z:
-rw-r--r-- 1 0 Aug 5 21:55 text
$
All the directories get execute permission.
Cheers,
David.
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