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Given that sed is considered a more lightweight dependency than awk,
and since sed is used by pam_namespace_helper anyway, use sed instead of
awk in namespace.init as well.
* modules/pam_namespace/namespace.init: Use sed instead of awk to obtain
the UMASK value from /etc/login.defs.
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This should fix shellcheck warning SC2004.
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* modules/pam_namespace/pam_namespace.c: call setuid() before execing the
namespace init script, so that scripts run with maximum privilege regardless
of the shell implementation.
* modules/pam_namespace/namespace.init: drop the '-p' bashism from the
shebang line
This is not a POSIX standard option, it's a bashism. The bash manpage says
that it's used to prevent the effective user id from being reset to the real
user id on startup, and to ignore certain unsafe variables from the
environment.
In the case of pam_namespace, the -p is not necessary for environment
sanitizing because the PAM module (properly) sanitizes the environment
before execing the script.
The stated reason given in CVS history for passing -p is to "preserve euid
when called from setuid apps (su, newrole)." This should be done more
portably, by calling setuid() before spawning the shell.
Signed-off-by: Steve Langasek <vorlon@debian.org>
Bug-Debian: http://bugs.debian.org/624842
Bug-Ubuntu: https://bugs.launchpad.net/bugs/1081323
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Cleanup trailing whitespaces, indentation that uses spaces before tabs,
and blank lines at EOF. Make the project free of warnings reported by
git diff --check 4b825dc642cb6eb9a060e54bf8d69288fbee4904 HEAD
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Purpose of commit: portability
Commit summary:
---------------
2009-08-31 Steve Langasek <vorlon@debian.org>
* modules/pam_namespace/namespace.init: make this portable to POSIX
awk, instead of using GNU awk extensions.
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Purpose of commit: new feature
Commit summary:
---------------
2008-02-01 Tomas Mraz <t8m@centrum.cz>
* modules/pam_namespace/namespace.conf.5.xml: Add documentation for
tmpfs and tmpdir polyinst and for ~ user list modifier.
* modules/pam_namespace/namespace.init: Add documentation for the
new init parameter. Add home directory initialization script.
* modules/pam_namespace/pam_namespace.8.xml: Document the new
init parameter of the namespace.init script.
* modules/pam_namespace/pam_namespace.c(copy_ent): Copy exclusive flag.
(cleanup_data): New function.
(process_line): Set exclusive flag. Add tmpfs and tmpdir methods.
(ns_override): Change behavior on the exclusive flag.
(poly_name): Process tmpfs and tmpdir methods.
(inst_init): Add flag for new directory initialization.
(create_dirs): Process the tmpdir method, add the new directory
flag.
(ns_setup): Remove unused code. Process the tmpfs method.
(cleanup_tmpdirs): New function.
(setup_namespace): Set data for proper cleanup. Cleanup the tmpdirs
on failures.
(pam_sm_close_session): Instead of parsing the config file again use
the previously set data for cleanup.
* modules/pam_namespace/pam_namespace.h: Add TMPFS and TMPDIR methods
and exclusive flag.
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Purpose of commit: bugfix, new feature
Commit summary:
---------------
2007-06-15 Tomas Mraz <t8m@centrum.cz>
* modules/pam_namespace/README.xml: Avoid duplication of
documentation.
* modules/pam_namespace/namespace.conf: More real life example
from MLS support.
* modules/pam_namespace/namespace.conf.5.xml: Likewise plus
properly describe how instance directory names are formed.
* modules/pam_namespace/namespace.init: Preserve euid when
called from setuid apps (su, newrole).
* modules/pam_namespace/pam_namespace.8.xml: Added option
no_unmount_on_close.
* modules/pam_namespace/pam_namespace.c (process_line): Polyinst
methods are now user, level and context. Fix crash on unknown
override user in config file.
(ns_override): Add explicit uid parameter.
(form_context): Skip for user method. Implement level based
polyinstantiation.
(poly_name): Initialize contexts. Add level based polyinst,
remove 'both' metod. Use raw contexts for instance names,
truncate long instance names and add hash.
(ns_setup): Hashing moved to poly_name().
(setup_namespace): Handle correctly override users for
su (when unmnt_remnt is used).
(pam_sm_close_session): Added no_unmount_on_close option.
* modules/pam_namespace/pam_namespace.h: Added
no_unmount_on_close_option, level method, limit on instance
directory name length.
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Purpose of commit: new feature
Commit summary:
---------------
* modules/pam_namespace/pam_namespace.c: New module
originally written by Janak Desai.
* modules/pam_namespace/Makefile.am: New.
* modules/pam_namespace/README: New.
* modules/pam_namespace/md5.c: New.
* modules/pam_namespace/md5.h: New.
* modules/pam_namespace/namespace.conf: New.
* modules/pam_namespace/namespace.conf.5: New.
* modules/pam_namespace/namespace.conf.5.xml: New.
* modules/pam_namespace/namespace.init: New.
* modules/pam_namespace/pam_namespace.8: New.
* modules/pam_namespace/pam_namespace.8.xml: New.
* modules/Makefile.am: Added pam_namespace.
* configure.in: Added pam_namespace, test for unshare
library call.
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