cdrt

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Why GNU su does not support the `wheel' group (2002)

ftp.gnu.org

148 pointsby cdrt3 tahun yang lalu143 comments

comments

3 tahun yang laludiscuss

Your example proves that not using arrays is worse. That loop will only run once and just print every element on one line. The array equivalent works as expected , _isn't_ affected by IFS, and can handle spaces in individual elements

    f='a b c d e'
    for i in "$f"; do echo $i; done
    # prints a b c d e

    f="a b c 'd e'"
    for i in $f; do echo $i; done
    # prints
    # a
    # b
    # c
    # 'd
    # e'

    f=(a b c 'd e')
    for i in "${f[@]}"; do echo $i; done
    # prints
    # a
    # b
    # c
    # d e

cdrt

3 tahun yang laludiscuss

You wouldn’t iterate over `echo *` anyway. This works just fine in bash/sh:

    for file in *; do
        echo "$file"
    done

cdrt

3 tahun yang laludiscuss

You’re thinking about it backwards

`su` predates `sudo` by a decade doesn’t offer the fine-grained control `sudo` has. With `su` if you have the root password, you can do anything you want as root. With `sudo` admins can configure what commands users are allowed to run as root and could specifically block `sudo bash` from running.