Add auditing support to bash

This is based on earlier (unaccepted) patch to add auditing
support which wasd done by Steve Grubb at Redhat.

This patch  depends on audit 1.4 to provide a logging function.
The resulting audit message looks like this:

time->Tue Jan 30 18:23:45 2007
type=USER_CMD msg=audit(1170199425.793:143): user pid=22862 uid=0 auid=0
subj=system_u:system_r:unconfined_t:s0-s0:c0.c1023
msg='cwd=2F726F6F742F7465737420646972 cmd=6C73202D6C (terminal=tty1
res=success)'

Which translates to:

type=USER_CMD msg=audit(01/30/2007 18:23:45.793:143) : user pid=22862 uid=root
auid=root subj=system_u:system_r:unconfined_t:s0-s0:c0.c1023
msg='cwd=/root/test dir cmd=ls -l (terminal=tty1 res=success)'

This patch causes bash to log all command line arguments when the shell
is started as aubash or "bash --audit". The preferred methos is to make a
symlink frp, bash to aubash and then add aubash to /etc/shells. Then you
can change root's shell to aubash.

1 files changed, 6 insertions, 0 deletions

diff --git a/flags.c b/flags.c
index 0c0868b..e50d6dc 100644
--- a/flags.c
+++ b/flags.c
@@ -142,6 +142,12 @@ int restricted = 0;		/* currently restricted */
 int restricted_shell = 0;	/* shell was started in restricted mode. */
 #endif /* RESTRICTED_SHELL */
 
+#if defined (AUDIT_SHELL)
+/* Non-zero means that this shell is audited. An audited shell records
+   each command that the root user executes. */
+int audited = 0;		/* shell was started in audit mode. */
+#endif /* AUDIT_SHELL */
+
 /* Non-zero means that this shell is running in `privileged' mode.  This
    is required if the shell is to run setuid.  If the `-p' option is
    not supplied at startup, and the real and effective uids or gids