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  1. #1


    Member Since
    Mar 20, 2008
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    What the @ symbol means
    Hello

    I was wondering if anyone knows what the @ symbol means on a files permission.
    example: -rw-rw-rw-@

    I know what the r, w, x, and d means on file permissions but I don't know what the @ symbol means.

    Thanks

  2. #2

    giulio's Avatar
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    Yep...

    If the file or directory has extended attributes, the permissions field printed by the -l option is followed by a '@' character.
    If the file or directory has extended security information, the permissions field printed by the -l option is followed by a '+' character.
    schweb This has to be one of the best threads ever in MF history...
    Cherokee This gets my vote for most innovative thread on Mac-Forums... ever.

  3. #3

    rman's Avatar
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    Cool
    From the man pages using ls with the -F option:

    -F Display a slash / immediately after each pathname that is a directory, an asterisk * after each that is executable, an at sign @ after each symbolic link, an equals sign = after each socket, a percent sign % after each whiteout, and a vertical bar | after each that is a FIFO.
    Life isn't about waiting for the storm to pass, It's about learning to dance in the rain!

  4. #4


    Member Since
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    Uh. Could someone point me to what those r,w,x,d things mean as well?

  5. #5


    Member Since
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    Quote Originally Posted by goobimama View Post
    Uh. Could someone point me to what those r,w,x,d things mean as well?
    Read / Write / eXecute / Directory.

    The first tells me what kind of object it is, then the next three characters of the file permissions relate to the owners permission, the next three to the group permission, and the last three to anyone else (or sometimes referred to as 'others'). The owner and group are shown as part of the file listing.

    So, for example if I list files in a directory and see this;

    drwxr-xr-x 121 root admin 272 Dec 14 23:00 myfiles

    It tells me it's a directory, the owner has read, write and execute permissions, the group has read and execute, and anyone else has read an execute permission. It also tells me the owner is root, and the group is admin. At the end it tells me the name of the file (or in this case, the directory).

    You can see this in plain English by right clicking a file in finder, and clicking 'get info'. In the ownership and permissions part, you'll see the same in rather plainer terms.

    You'll also sometimes see these permissions set out as a simple 3 digit number - read/write execute for everybody would be '777'. To allow just the ower full control, and the group and others to read/write only would be 755 etc.

  6. #6


    Member Since
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    Many thanks! All is clear now

  7. #7

    rman's Avatar
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    Cool
    To add a little bit more

    r - 4
    w - 2
    x - 1

    for a total of 7

    777 =-rwxrwxrwx
    755 = -rwxr-xr-x
    Life isn't about waiting for the storm to pass, It's about learning to dance in the rain!

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