How to copy directories?

This is a discussion on How to copy directories? within the Tech Board forums, part of the Community Boards category; Im trying to copy a ton of files in one directory to another and im using linux-2.6.30 i was wondering ...

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    How to copy directories?

    Im trying to copy a ton of files in one directory to another and im using linux-2.6.30
    i was wondering if there was a command or recursive way to say {yes} when it askes if you want to overwrite the existing file? i looked cp online and it says there should be a command --reply but im not really sure how to override the prompt that asking if u

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    Registered User claudiu's Avatar
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    uhmm.. and this is related to C how?

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    and the Hat of Guessing tabstop's Avatar
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    This will find its way to Tech Board soon enough.

    You should type "man cp" at your terminal and read the options. I don't have a "reply", but I have an "update".

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    C++ Witch laserlight's Avatar
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    Quote Originally Posted by tabstop
    This will find its way to Tech Board soon enough.
    Right.
    C + C++ Compiler: MinGW port of GCC
    Version Control System: Bazaar

    Look up a C++ Reference and learn How To Ask Questions The Smart Way

  5. #5
    ... kermit's Avatar
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    Quote Originally Posted by kiros88 View Post
    i was wondering if there was a command or recursive way to say {yes} when it askes if you want to overwrite the existing file?
    I dunno...maybe the yes command?

    Edit:

    The yes man page is almost worthless. Have a look at this wiki for an idea of how it can be used.
    Last edited by kermit; 04-16-2010 at 03:45 PM.

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    spurious conceit MK27's Avatar
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    This is one reason I recommend using mc as a file browser on linux. It's terminal based, which turns some people off, but

    1) it actually makes way more sense to have a file browser with shell/command line integration, rather than a GUI file browser with icon/drag and drop integration. Which the later remind me more of crib toys you would hang to help an infant learn to recognize objects rather than a tool a self-respecting programmer would want.

    2) GNU mc is still being developed, meaning it's like 20 years mature, and has way more to it than Nautilus, Konqueror, etc.

    Anyway, here's a screenshot of me copying directories from ~/C into a tmp directory to create an iso for a dvd backup. The view is split paned between the two directories. The bold white items are directories, you click on one, press F5, it is copied into the other panel. Recursively, all attributes preserved (if the filesystem type is the same, which it is), done.

    All distros have an mc package, either "yum search midnight" or "apt-cache search midnight" will find it (mc = midnight commander ).

    If you want to download and build:
    Midnight Commander

    Anyway, that's why I dunno how to do what you are saying off the top of my head, because I have been spoiled by mc and the fact that it's always there on any linux system and even works over ssh because it is terminal based.

    I've done shell scripts for this (actually I think it is doable just with cp switches), but unless you need to automate (which you could do in C anyway) it will only take 2 minutes to install mc, type "mc" in a terminal, and another 2 min to find <F5>, so that's the easy way. It asks you once if you want to overwrite, you click "all" and that's it.
    Attached Images Attached Images  
    Last edited by MK27; 04-16-2010 at 02:02 PM.
    C programming resources:
    GNU C Function and Macro Index -- glibc reference manual
    The C Book -- nice online learner guide
    Current ISO draft standard
    CCAN -- new CPAN like open source library repository
    3 (different) GNU debugger tutorials: #1 -- #2 -- #3
    cpwiki -- our wiki on sourceforge

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    Supply the "-f" switch
    Code:
    cp -f <src> <dest>

  8. #8
    Captain Crash brewbuck's Avatar
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    Code:
    cp -fvR /path/to/src /path/to/dst
    If you want to preserve file ownership, mode, and timestamp, give -p:

    Code:
    cp -fpvR /path/to/src /path/to/dst
    Code:
    //try
    //{
    	if (a) do { f( b); } while(1);
    	else   do { f(!b); } while(1);
    //}

  9. #9
    spurious conceit MK27's Avatar
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    I am thinking kiros88's real problem is this:

    alias cp='cp -i'

    Most distros put this in ~/.bashrc. So your "cp" is by default a "cp -i", which means it asks for confirmation.

    Ie, it's not a switch you're missing, it's a switch you're (inadvertantly) using.
    C programming resources:
    GNU C Function and Macro Index -- glibc reference manual
    The C Book -- nice online learner guide
    Current ISO draft standard
    CCAN -- new CPAN like open source library repository
    3 (different) GNU debugger tutorials: #1 -- #2 -- #3
    cpwiki -- our wiki on sourceforge

  10. #10
    Registered User jeffcobb's Avatar
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    Actually in this case I would use rsync:

    Code:
    rsync -av /srcdir/foo /destdir/bar/
    If you want to see whats going on, add --progress. In any event, not only does this handle the recursion for you, it also handles file permissions and so on. Also if there is /src/foo.txt and /dest/foo.txt, it will only copy foo.txt if the src is newer than the destination. As an added bonus, if you are going over a network it can apply compression to the files as well as make use of ssh. Oh yeah and it also confirms the copy was good before moving on. rsync - Wikipedia, the free encyclopedia
    C/C++ Environment: GNU CC/Emacs
    Make system: CMake
    Debuggers: Valgrind/GDB

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