chmod equivalent to find commands

[Fafa Diliha Romanova]

hello.

i know there's an equivalent to these two find commands that
can be summed up in one chmod command:

find . -type d -exec chmod 755 {} \;
find . -type f -exec chmod 644 {} \;

it fixes my permissions ...
i haven't tested this yet but i think it's wrong: chmod -R u+rwX,a+rX

what would be the best solution here?

thanks,
-- fafa

[Eric McCoy]

Post by Fafa Diliha Romanova
hello.
i know there's an equivalent to these two find commands that
find . -type d -exec chmod 755 {} \;
find . -type f -exec chmod 644 {} \;
it fixes my permissions ...
i haven't tested this yet but i think it's wrong: chmod -R u+rwX,a+rX
what would be the best solution here?

I would do it the same way you do, but with xargs instead:

find . -type X -print0 | xargs -0 chmod XXX

If you were feeling crazy and use sh:

find . | while read path; do \
if [ -d "$path" ]; then chmod 755;
else chmod 644; fi; \
done

The latter is overkill, but the approach can be useful for nontrivial
operations on systems that don't support -print0. It also has the
benefit that you can do it over ssh without having to copy over a
script, e.g.

ssh ***@host sh -s <script.sh

(No nightmares from having to double- or triple-escape special
characters, either.)

Sorry, I don't know how to do it all with chmod. I assume you've
consulted the excellent FreeBSD man pages?

[Giorgos Keramidas]

Post by Eric McCoy

Post by Fafa Diliha Romanova
hello.
i know there's an equivalent to these two find commands that
find . -type d -exec chmod 755 {} \;
find . -type f -exec chmod 644 {} \;

Uhm, why? Even if that were possible, isn't clarity more important that
stuffing as many actions as possible in one line?

What you list above is similar to the way I use for changing the
permissions of files/dirs and it works all the time.

There's no reason to try to write one, long, complicated command just
for the sake of making it one command instead of two. Otherwise, you
may as well do more complex stuff like:

find . | while read line; do
mode=''
[ -d "${line}" ] && mode=0755
[ -f "${line}" ] && mode=0644

[ -n "${mode}" ] && echo "chmod ${mode} \"${line}\""
done | sh

But this is getting quickly very difficult to remember easily and repeat
consistently every time you want to do something similar :)

Post by Eric McCoy

Post by Fafa Diliha Romanova
what would be the best solution here?

find . -type X -print0 | xargs -0 chmod XXX

This is an excellent way to do this, IMHO.

Post by Eric McCoy
find . | while read path; do \
if [ -d "$path" ]; then chmod 755;
else chmod 644; fi; \
done

I guess you meant to write:

find . | while read path; do \
if [ -d "$path" ]; then chmod 755 "${path}";
else chmod 644 "${path}"; fi; \
done

Otherwise, many chmod failures are the only result.

But this has a minor buglet. It will change everything that is not a
directory to mode 0644. This mode is ok for files, but it may not be ok
(or it may even fail) for other stuff (symbolic links, for instance).

- Giorgos

[Loren M. Lang]

Post by Giorgos Keramidas

Post by Eric McCoy

Post by Fafa Diliha Romanova
hello.
i know there's an equivalent to these two find commands that
find . -type d -exec chmod 755 {} \;
find . -type f -exec chmod 644 {} \;

Uhm, why? Even if that were possible, isn't clarity more important that
stuffing as many actions as possible in one line?
What you list above is similar to the way I use for changing the
permissions of files/dirs and it works all the time.
There's no reason to try to write one, long, complicated command just
for the sake of making it one command instead of two. Otherwise, you

Summing it up into one command does not neccessarily mean it's longer or
more complicated. I use the following command all the time to fix
permissions similar to what he seems to be doing. Though it's not
technically equivalent, it's probably all he needs.

chmod -R u=rwX,go=rX .

My umask of 022 simplifies the command to the following:

chmod -R =rwX .

Post by Giorgos Keramidas
find . | while read line; do
mode=''
[ -d "${line}" ] && mode=0755
[ -f "${line}" ] && mode=0644
[ -n "${mode}" ] && echo "chmod ${mode} \"${line}\""
done | sh
But this is getting quickly very difficult to remember easily and repeat
consistently every time you want to do something similar :)

Post by Eric McCoy

Post by Fafa Diliha Romanova
what would be the best solution here?

find . -type X -print0 | xargs -0 chmod XXX

This is an excellent way to do this, IMHO.

Post by Eric McCoy
find . | while read path; do \
if [ -d "$path" ]; then chmod 755;
else chmod 644; fi; \
done

find . | while read path; do \
if [ -d "$path" ]; then chmod 755 "${path}";
else chmod 644 "${path}"; fi; \
done
Otherwise, many chmod failures are the only result.
But this has a minor buglet. It will change everything that is not a
directory to mode 0644. This mode is ok for files, but it may not be ok
(or it may even fail) for other stuff (symbolic links, for instance).
- Giorgos
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[Dan Nelson]

Post by Fafa Diliha Romanova
i know there's an equivalent to these two find commands that
find . -type d -exec chmod 755 {} \;
find . -type f -exec chmod 644 {} \;
it fixes my permissions ...
i haven't tested this yet but i think it's wrong: chmod -R u+rwX,a+rX

That chmod command should work just fine.

[Loren M. Lang]

Post by Fafa Diliha Romanova
hello.
i know there's an equivalent to these two find commands that
find . -type d -exec chmod 755 {} \;
find . -type f -exec chmod 644 {} \;

The EXACT equivalent would be:

find . -type d -exec chmod u=rwx,go=rx {} \;
find . -type f -exec chmod u=rw,go=r {} \;

But I take it that that isn't exactly what your looking for. Your
probably looking for something like "chmod -R u=rwX,go=rX ."

Post by Fafa Diliha Romanova
it fixes my permissions ...
i haven't tested this yet but i think it's wrong: chmod -R u+rwX,a+rX

This may work it depends on exactly what you need to do and how bad your
permissions are messed up. Instead of a+rX, it might be better to do
go+rX since you already have u covered, but I don't think it will make a
big difference. Also, this adds to the existing permissions, it won't
take away any permissions like my example earlier does. Lastly, the big
difference between this and the find version is that the find version,
both mine and yours, will set the execute bit on all directories and not
on any normal files where the recursive chmod with the X permission with
set the x permission on any file/directory that already has at least one
type of execute permission already set and not on any other files or
directories. So if your permissions are messed so badly that you have
directories without any execute permission, this won't fix that. The
find version on the other hand will ignore everything that is not a
normal file or directory (i.e. fifos, sockets, device files), but this
probably won't be a big deal either. The single recursive chmod I gave
you will most likely be what you need.

Post by Fafa Diliha Romanova
what would be the best solution here?
thanks,
-- fafa
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Bluescreen leads to downtime.
Downtime leads to suffering.
NT is the path to the darkside.
Powerful Unix is.

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Fingerprint: CEE1 AAE2 F66C 59B5 34CA C415 6D35 E847 0118 A3D2

[Loren M. Lang]

Post by Loren M. Lang

Post by Fafa Diliha Romanova
hello.
i know there's an equivalent to these two find commands that
find . -type d -exec chmod 755 {} \;
find . -type f -exec chmod 644 {} \;

find . -type d -exec chmod u=rwx,go=rx {} \;
find . -type f -exec chmod u=rw,go=r {} \;
But I take it that that isn't exactly what your looking for. Your
probably looking for something like "chmod -R u=rwX,go=rX ."

And one last thing, I'm assuming your umask is probably 022. When chmod
doesn't have the u, g, o, or a qualifies, then it uses the umask to mask
the permission bits as appropriate so the command can be simplified to
the following:

chmod -R =rwX .

Post by Loren M. Lang

Post by Fafa Diliha Romanova
it fixes my permissions ...
i haven't tested this yet but i think it's wrong: chmod -R u+rwX,a+rX

This may work it depends on exactly what you need to do and how bad your
permissions are messed up. Instead of a+rX, it might be better to do
go+rX since you already have u covered, but I don't think it will make a
big difference. Also, this adds to the existing permissions, it won't
take away any permissions like my example earlier does. Lastly, the big
difference between this and the find version is that the find version,
both mine and yours, will set the execute bit on all directories and not
on any normal files where the recursive chmod with the X permission with
set the x permission on any file/directory that already has at least one
type of execute permission already set and not on any other files or
directories. So if your permissions are messed so badly that you have
directories without any execute permission, this won't fix that. The
find version on the other hand will ignore everything that is not a
normal file or directory (i.e. fifos, sockets, device files), but this
probably won't be a big deal either. The single recursive chmod I gave
you will most likely be what you need.

Post by Fafa Diliha Romanova
what would be the best solution here?
thanks,
-- fafa
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Bluescreen leads to downtime.
Downtime leads to suffering.
NT is the path to the darkside.
Powerful Unix is.
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Fingerprint: CEE1 AAE2 F66C 59B5 34CA C415 6D35 E847 0118 A3D2

--
I sense much NT in you.
NT leads to Bluescreen.
Bluescreen leads to downtime.
Downtime leads to suffering.
NT is the path to the darkside.
Powerful Unix is.

Public Key: ftp://ftp.tallye.com/pub/lorenl_pubkey.asc
Fingerprint: CEE1 AAE2 F66C 59B5 34CA C415 6D35 E847 0118 A3D2

[Fafa Diliha Romanova]

Thank you for your kind assistance!

That was exactly what I was looking for.

But after the constructive response from many other kind souls
on this list, I have decided to stick with my find command
for now and keep your recursive chmod as an alternate.

I keep a local mirror of all my modified configuration files
(gives me easy backup and a great deal control over my system).
I needed this command to quickly change permissions and
ownership of the homedir I store them in.

Thanks again!
-- Fafa

----- Original Message -----
From: "Loren M. Lang" <***@alzatex.com>
To: "Fafa Diliha Romanova" <***@london.com>
Subject: Re: chmod equivalent to find commands
Date: Sun, 13 Mar 2005 02:09:12 -0800

Post by Loren M. Lang

Post by Fafa Diliha Romanova
hello.
i know there's an equivalent to these two find commands that
find . -type d -exec chmod 755 {} \;
find . -type f -exec chmod 644 {} \;

find . -type d -exec chmod u=rwx,go=rx {} \;
find . -type f -exec chmod u=rw,go=r {} \;
But I take it that that isn't exactly what your looking for. Your
probably looking for something like "chmod -R u=rwX,go=rX ."

Post by Fafa Diliha Romanova
it fixes my permissions ...
i haven't tested this yet but i think it's wrong: chmod -R u+rwX,a+rX

This may work it depends on exactly what you need to do and how bad your
permissions are messed up. Instead of a+rX, it might be better to do
go+rX since you already have u covered, but I don't think it will make a
big difference. Also, this adds to the existing permissions, it won't
take away any permissions like my example earlier does. Lastly, the big
difference between this and the find version is that the find version,
both mine and yours, will set the execute bit on all directories and not
on any normal files where the recursive chmod with the X permission with
set the x permission on any file/directory that already has at least one
type of execute permission already set and not on any other files or
directories. So if your permissions are messed so badly that you have
directories without any execute permission, this won't fix that. The
find version on the other hand will ignore everything that is not a
normal file or directory (i.e. fifos, sockets, device files), but this
probably won't be a big deal either. The single recursive chmod I gave
you will most likely be what you need.

Post by Fafa Diliha Romanova
what would be the best solution here?
thanks,
-- fafa
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NT leads to Bluescreen.
Bluescreen leads to downtime.
Downtime leads to suffering.
NT is the path to the darkside.
Powerful Unix is.
Public Key: ftp://ftp.tallye.com/pub/lorenl_pubkey.asc
Fingerprint: CEE1 AAE2 F66C 59B5 34CA C415 6D35 E847 0118 A3D2

<< 2.dat >>

[Fafa Diliha Romanova]

I think it's really best that I stick to my find commands.

chmod -R u=rwX,go=rX . worked really fast but it also made all
my files executable.

Bad idea, asking for such a command.

By the way, umask 022? What is meant by that?

----- Original Message -----
From: "Loren M. Lang" <***@alzatex.com>
To: "Giorgos Keramidas" <***@ceid.upatras.gr>
Subject: Re: chmod equivalent to find commands
Date: Sun, 13 Mar 2005 02:15:00 -0800

Post by Loren M. Lang

Post by Giorgos Keramidas

Post by Eric McCoy

Post by Fafa Diliha Romanova
hello.
i know there's an equivalent to these two find commands that
find . -type d -exec chmod 755 {} \;
find . -type f -exec chmod 644 {} \;

Uhm, why? Even if that were possible, isn't clarity more important that
stuffing as many actions as possible in one line?
What you list above is similar to the way I use for changing the
permissions of files/dirs and it works all the time.
There's no reason to try to write one, long, complicated command just
for the sake of making it one command instead of two. Otherwise, you

Summing it up into one command does not neccessarily mean it's longer or
more complicated. I use the following command all the time to fix
permissions similar to what he seems to be doing. Though it's not
technically equivalent, it's probably all he needs.
chmod -R u=rwX,go=rX .
chmod -R =rwX .

Post by Giorgos Keramidas
find . | while read line; do
mode=''
[ -d "${line}" ] && mode=0755
[ -f "${line}" ] && mode=0644
[ -n "${mode}" ] && echo "chmod ${mode} \"${line}\""
done | sh
But this is getting quickly very difficult to remember easily and repeat
consistently every time you want to do something similar :)

Post by Eric McCoy

Post by Fafa Diliha Romanova
what would be the best solution here?

find . -type X -print0 | xargs -0 chmod XXX

This is an excellent way to do this, IMHO.

Post by Eric McCoy
find . | while read path; do \
if [ -d "$path" ]; then chmod 755;
else chmod 644; fi; \
done

find . | while read path; do \
if [ -d "$path" ]; then chmod 755 "${path}";
else chmod 644 "${path}"; fi; \
done
Otherwise, many chmod failures are the only result.
But this has a minor buglet. It will change everything that is not a
directory to mode 0644. This mode is ok for files, but it may not be ok
(or it may even fail) for other stuff (symbolic links, for instance).
- Giorgos
_______________________________________________
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--
I sense much NT in you.
NT leads to Bluescreen.
Bluescreen leads to downtime.
Downtime leads to suffering.
NT is the path to the darkside.
Powerful Unix is.
Public Key: ftp://ftp.tallye.com/pub/lorenl_pubkey.asc
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<< 2.dat >>

[Loren M. Lang]

Post by Fafa Diliha Romanova
I think it's really best that I stick to my find commands.
chmod -R u=rwX,go=rX . worked really fast but it also made all
my files executable.

That should only of happened if they already had at least one execute
bit set. Now if you mistyped it as a lower-case x, then it's garenteed
to set the execute bit.

Post by Fafa Diliha Romanova
Bad idea, asking for such a command.
By the way, umask 022? What is meant by that?

umask is used to mask off certain permission bits from being set when a
file is created. Most files are created with permissions 666, but a
umask of 022 will mask it to 644. For directories it would mask 777 to
755. Other common umask are 002, 027, and 077.

Umask: 022 002 027 077 022 002 027 077
Start: 666 666 666 666 777 777 777 777
Finish: 644 664 640 600 755 775 750 700

The techninal operation is "mode & ~umask"

Now when you use the string =rwX instead of something like u=rwX, no
qualifier in front of the =, +, or - sign, then it sets all bits minus
what is masked off so a umask of 022 will prevent it from setting the
write bit on group or other permissions.

Post by Fafa Diliha Romanova
----- Original Message -----
Subject: Re: chmod equivalent to find commands
Date: Sun, 13 Mar 2005 02:15:00 -0800

Post by Loren M. Lang

Post by Giorgos Keramidas

Post by Eric McCoy

Post by Fafa Diliha Romanova
hello.
i know there's an equivalent to these two find commands that
find . -type d -exec chmod 755 {} \;
find . -type f -exec chmod 644 {} \;

Uhm, why? Even if that were possible, isn't clarity more important that
stuffing as many actions as possible in one line?
What you list above is similar to the way I use for changing the
permissions of files/dirs and it works all the time.
There's no reason to try to write one, long, complicated command just
for the sake of making it one command instead of two. Otherwise, you

Summing it up into one command does not neccessarily mean it's longer or
more complicated. I use the following command all the time to fix
permissions similar to what he seems to be doing. Though it's not
technically equivalent, it's probably all he needs.
chmod -R u=rwX,go=rX .
chmod -R =rwX .

Post by Giorgos Keramidas
find . | while read line; do
mode=''
[ -d "${line}" ] && mode=0755
[ -f "${line}" ] && mode=0644
[ -n "${mode}" ] && echo "chmod ${mode} \"${line}\""
done | sh
But this is getting quickly very difficult to remember easily and repeat
consistently every time you want to do something similar :)

Post by Eric McCoy

Post by Fafa Diliha Romanova
what would be the best solution here?

find . -type X -print0 | xargs -0 chmod XXX

This is an excellent way to do this, IMHO.

Post by Eric McCoy
find . | while read path; do \
if [ -d "$path" ]; then chmod 755;
else chmod 644; fi; \
done

find . | while read path; do \
if [ -d "$path" ]; then chmod 755 "${path}";
else chmod 644 "${path}"; fi; \
done
Otherwise, many chmod failures are the only result.
But this has a minor buglet. It will change everything that is not a
directory to mode 0644. This mode is ok for files, but it may not be ok
(or it may even fail) for other stuff (symbolic links, for instance).
- Giorgos
_______________________________________________
http://lists.freebsd.org/mailman/listinfo/freebsd-questions

--
I sense much NT in you.
NT leads to Bluescreen.
Bluescreen leads to downtime.
Downtime leads to suffering.
NT is the path to the darkside.
Powerful Unix is.
Public Key: ftp://ftp.tallye.com/pub/lorenl_pubkey.asc
Fingerprint: CEE1 AAE2 F66C 59B5 34CA C415 6D35 E847 0118 A3D2

<< 2.dat >>
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NT leads to Bluescreen.
Bluescreen leads to downtime.
Downtime leads to suffering.
NT is the path to the darkside.
Powerful Unix is.

Public Key: ftp://ftp.tallye.com/pub/lorenl_pubkey.asc
Fingerprint: CEE1 AAE2 F66C 59B5 34CA C415 6D35 E847 0118 A3D2