[9/9] e2scrub,e2scrub_all: print a (more understandable) error if not run as root

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 scrub/e2scrub.in     | 5 +++++
 scrub/e2scrub_all.in | 5 +++++
 2 files changed, 10 insertions(+)

On Wed, Mar 20, 2019 at 10:02:18PM -0400, Theodore Ts'o wrote:
> Signed-off-by: Theodore Ts'o <tytso@mit.edu>

Oops, yeah, I forgot this. :/

Looks ok,
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>

--D

> ---
>  scrub/e2scrub.in     | 5 +++++
>  scrub/e2scrub_all.in | 5 +++++
>  2 files changed, 10 insertions(+)
> 
> diff --git a/scrub/e2scrub.in b/scrub/e2scrub.in
> index 301574968..666d6485a 100644
> --- a/scrub/e2scrub.in
> +++ b/scrub/e2scrub.in
> @@ -25,6 +25,11 @@
>  
>  PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
>  
> +if (( $EUID != 0 )); then
> +    echo "e2scrub must be run as root"
> +    exit 1
> +fi
> +
>  snap_size_mb=256
>  fstrim=0
>  reap=0
> diff --git a/scrub/e2scrub_all.in b/scrub/e2scrub_all.in
> index cad232987..a02ffe226 100644
> --- a/scrub/e2scrub_all.in
> +++ b/scrub/e2scrub_all.in
> @@ -20,6 +20,11 @@
>  
>  PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
>  
> +if (( $EUID != 0 )); then
> +    echo "e2scrub_all must be run as root"
> +    exit 1
> +fi
> +
>  scrub_all=0
>  snap_size_mb=256
>  reap=0
> -- 
> 2.19.1
>

On Wed, Mar 20, 2019 at 10:02:18PM -0400, Theodore Ts'o wrote:
> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
> ---
>  scrub/e2scrub.in     | 5 +++++
>  scrub/e2scrub_all.in | 5 +++++
>  2 files changed, 10 insertions(+)
> 
> diff --git a/scrub/e2scrub.in b/scrub/e2scrub.in
> index 301574968..666d6485a 100644
> --- a/scrub/e2scrub.in
> +++ b/scrub/e2scrub.in
> @@ -25,6 +25,11 @@
>  
>  PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
>  
> +if (( $EUID != 0 )); then

EUID is bashism and might not be available in a different shell. But I
am sure we're using a lot of those and we have "#!/bin/bash".

It's just somehting to consider, because I am not sure if we say
anywhere that those scripts will require bash. Personally I do not care
too much, but I am using bash exclusively :)

-Lukas

> +    echo "e2scrub must be run as root"
> +    exit 1
> +fi
> +
>  snap_size_mb=256
>  fstrim=0
>  reap=0
> diff --git a/scrub/e2scrub_all.in b/scrub/e2scrub_all.in
> index cad232987..a02ffe226 100644
> --- a/scrub/e2scrub_all.in
> +++ b/scrub/e2scrub_all.in
> @@ -20,6 +20,11 @@
>  
>  PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
>  
> +if (( $EUID != 0 )); then
> +    echo "e2scrub_all must be run as root"
> +    exit 1
> +fi
> +
>  scrub_all=0
>  snap_size_mb=256
>  reap=0
> -- 
> 2.19.1
>

On Thu, Mar 21, 2019 at 12:36:38PM +0100, Lukas Czerner wrote:
> 
> EUID is bashism and might not be available in a different shell. But I
> am sure we're using a lot of those and we have "#!/bin/bash".
> 
> It's just somehting to consider, because I am not sure if we say
> anywhere that those scripts will require bash. Personally I do not care
> too much, but I am using bash exclusively :)

Bash is considered "essential" by Debian so it's guaranteed to be
installed.  So I haven't really considered it high priority to try to
make it work on dash or pdksh or mksh or some other nitpicky POSIX.2
shell.

I assume that the right place to state this is in the RPM spec file
(it isn't not needed for debian/control since bash is an essential
package).

Shrug; I'd accept clean patches that allowed the use of a strict
POSIX.2-only shell, especially if there were distributions who cared
about this.  But I find it hard to get excited about it, personally.  :-)

					- Ted