Hiyas,

pam_mount is crashing /bin/login under special circumstances when I login via
a text console and I would like to get a backtrace. In a recent thread using
a core dump was suggested for a crashing window manager, but it was needed to
run a "ulimit -c unlimited" or similiar to get the core dump in the shell
before the window manager is started. But how can I do this for /bin/login?

Regards,
Till
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How can I set ulimits for /bin/login?


For a general program: wrap the program in a shell script. Move the program
to a new name somewhere else, then put a script at the original name:
#! /bin/bash
ulimit -c unlimited
exec /path/to/new/name/of/original/program "$@"

For the case of /bin/login, perhaps there will be problems with the
initial environment; see INVOCATION in "man bash". Therefore, wrap
/bin/login in a short C program which calls setrlimit(3) then exec*()
the original 'login' which has been moved to a different location.
Beware the security implications due to running under setuid(), etc.

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On Sat September 27 2008, John Reiser wrote:
> > How can I set ulimits for /bin/login?
>
> For a general program: wrap the program in a shell script. Move the
> program to a new name somewhere else, then put a script at the original
> name: #! /bin/bash
> ulimit -c unlimited
> exec /path/to/new/name/of/original/program "$@"

Thank you, this worked perfectly.

Regards,
Till
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