GNU bug report logs - #30413
file exists and is +x but cannot be executed

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Marco van Hulten <marco <at> hulten.org>
To: bug-guix <at> gnu.org
Subject: file exists and is +x but cannot be executed
Date: Sat, 10 Feb 2018 18:30:35 +0100

Hello—

I had cups installed as root and another user.  I could use lpr.
Now I tried to install it under user2 (to have the lpr binary
available, among other things), but I cannot execute `lpr`:


user2 <at> graviton ~$ guix package -i cups
The following package will be upgraded:
   cups 2.2.4 → 2.2.4   /gnu/store/x5d85f1n0qalqlrr7rfwrj135m80snlb-cups-2.2.4

nothing to be done
user2 <at> graviton ~$ lpr
lpr: No such file or directory
user2 <at> graviton ~$ which lpr
/home/user2/.guix-profile/bin/lpr
user2 <at> graviton ~$ ls -l /home/user2/.guix-profile/bin/lpr
lrwxrwxrwx 11 root root 62 Jan  1 1970 /home/user2/.guix-profile/bin/lpr
-> /gnu/store/x5d85f1n0qalqlrr7rfwrj135m80snlb-cups-2.2.4/bin/lpr
user2 <at> graviton ~$ ls -l
/gnu/store/x5d85f1n0qalqlrr7rfwrj135m80snlb-cups-2.2.4/bin/lpr
-r-xr-xr-x 2 root root 14624 Jan  1 1970 /gnu/store/x5d85f1n0qalqlrr7rfwrj135m80snlb-cups-2.2.4/bin/lpr
user2 <at> graviton ~$ /gnu/store/x5d85f1n0qalqlrr7rfwrj135m80snlb-cups-2.2.4/bin/lpr
/gnu/store/x5d85f1n0qalqlrr7rfwrj135m80snlb-cups-2.2.4/bin/lpr: No such file or directory
user2 <at> graviton ~$ file /gnu/store/x5d85f1n0qalqlrr7rfwrj135m80snlb-cups-2.2.4/bin/lpr
/gnu/store/x5d85f1n0qalqlrr7rfwrj135m80snlb-cups-2.2.4/bin/lpr: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, interpreter /gnu/store/3h31zsqxjjg52da5gp3qmhkh4x8klhah-glibc-2.25/lib/ld-linux-x86-64.so.2, or GNU/Linux 2.6.32, stripped, with debug_info


But it looks as if it is there.  Also, the executable bit is set for
world.


user2 <at> graviton ~$ less /gnu/store/x5d85f1n0qalqlrr7rfwrj135m80snlb-cups-2.2.4/bin/lpr


showed the name of a file, so I checked its existence as well:


user2 <at> graviton ~$ file /gnu/store/3h31zsqxjjg52da5gp3qmhkh4x8klhah-glibc-2.25/lib/ld-linux-x86-64.so.2 /gnu/store/3h31zsqxjjg52da5gp3qmhkh4x8klhah-glibc-2.25/lib/ld-linux-x86-64.so.2: symbolic link to ld-2.25.so
user2 <at> graviton ~$ cd /gnu/store/3h31zsqxjjg52da5gp3qmhkh4x8klhah-glibc-2.25/lib/
user2 <at> graviton /gnu/store/3h31zsqxjjg52da5gp3qmhkh4x8klhah-glibc-2.25/lib$
file ld-2.25.so ld-2.25.so: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, not stripped, with debug_info


I am using GNU Guix of a week old or so.

—Marco

Message #8 received at 30413 <at> debbugs.gnu.org (full text, mbox):

From: ludo <at> gnu.org (Ludovic Courtès)
To: Marco van Hulten <marco <at> hulten.org>
Cc: 30413 <at> debbugs.gnu.org
Subject: Re: bug#30413: file exists and is +x but cannot be executed
Date: Wed, 14 Feb 2018 14:45:41 +0100

Hi,

Marco van Hulten <marco <at> hulten.org> skribis:

> user2 <at> graviton ~$ lpr
> lpr: No such file or directory
> user2 <at> graviton ~$ which lpr
> /home/user2/.guix-profile/bin/lpr

Could it be that /gnu/store is mounted as no-exec, or something along
these lines?  What does the ‘mount’ command show?

Thanks,
Ludo’.

Message #11 received at 30413 <at> debbugs.gnu.org (full text, mbox):

From: Marco van Hulten <marco <at> hulten.org>
To: ludo <at> gnu.org (Ludovic Courtès)
Cc: 30413 <at> debbugs.gnu.org
Subject: Re: bug#30413: file exists and is +x but cannot be executed
Date: Thu, 15 Feb 2018 09:50:25 +0100

Ludovic—

Je 14 feb 14:45 skribis Ludovic:
> Marco van Hulten <marco <at> hulten.org> skribis:
> 
> > user2 <at> graviton ~$ lpr
> > lpr: No such file or directory
> > user2 <at> graviton ~$ which lpr
> > /home/user2/.guix-profile/bin/lpr  
> 
> Could it be that /gnu/store is mounted as no-exec, or something along
> these lines?  What does the ‘mount’ command show?

Could have been, but not likely as I remember other commands, surely
several from /gnu/store/, working properly.

Right now `lpr` works (and I didn't do a pull; path is the same).
I would have reported that before if I had tried to use the printer
again.  In any case, the issue went away — the bug report can be closed
(as unconfirmable or something).

Thanks!

—Marco

Message #16 received at 30413-done <at> debbugs.gnu.org (full text, mbox):

From: Andreas Enge <andreas <at> enge.fr>
To: Marco van Hulten <marco <at> hulten.org>
Cc: 30413-done <at> debbugs.gnu.org,
 Ludovic Courtès <ludo <at> gnu.org>
Subject: Re: bug#30413: file exists and is +x but cannot be executed
Date: Thu, 15 Feb 2018 10:45:15 +0100

Close the bug as suggested by the submitter.

Andreas

PS: Just sending a message to BUGNUMBER-done <at> debbugs.gnu.org does the job,
    and anybody can do it.

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