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Full Discussion: sendmail doesn't work for root
Operating Systems Linux Red Hat sendmail doesn't work for root Post 302678259 by Corona688 on Friday 27th of July 2012 01:30:06 PM
Old 07-27-2012
It's telling you the problem -- /etc/mail/trusted-users or /etc/mail is world-writable. Someone must have used the magic sledgehammer, chmod 777-ing it in the past in a misguided attempt to fix a 'problem'.

When something is running as root, loose permissions are a big deal. Anything could inject malicious contents into there and mislead a root daemon, possibly executing arbitrary commands or escalating permissions. So it does checks on it that it wouldn't when running as a limited user.

Reduce the permissions to what you actually need.
 

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LEARN ABOUT CENTOS

cgcreate

CGCREATE(1)							 libcgroup Manual						       CGCREATE(1)

NAME

       cgcreate - create new cgroup(s)

SYNOPSIS

       cgcreate [-h] [-t <tuid>:<tgid>] [-a <agid>:<auid>] [-f mode] [-d mode] [-s mode] -g <controllers>:<path> [-g ...]

DESCRIPTION

       The command creates new cgroup(s) defined by the options -g.

       -a <agid>:<auid>
	      defines  the  name of the user and the group which own the rest of the defined control group's files. These users are allowed to set
	      subsystem parameters and create subgroups.  The default value is the same as has the parent cgroup.

       -d, --dperm=mode
	      sets the permissions of a control groups directory.  The permissions needs to be specified as octal numbers e.g.	-d 775.

       -f, --fperm=mode
	      sets the permissions of the control groups parameters.  The permissions needs to be specified as octal numbers e.g.   -f	775.   The
	      value  is  not  used as given because the current owner's permissions are used as an umask (so 777 will set group and others permis-
	      sions to the owners permissions).

       -g <controllers>:<path>
	      defines control groups to be added.  controllers is a list of controllers and path is the relative path to  control  groups  in  the
	      given controllers list. This option can be specified multiple times.

       -h, --help
	      display this help and exit

       -s, --tperm=mode
	      sets  the  permissions  of  the control group tasks file.  The permissions needs to be specified as octal numbers e.g.  -s 775.  The
	      value is not used as given because the current owner's permissions are used as an umask (so 777 will set group  and  others  permis-
	      sions to the owners permissions).

       -t <tuid>:<tgid>
	      defines  the  name of the user and the group, which owns tasks file of the defined control group. I.e. this user and members of this
	      group have write access to the file.  The default value is the same as has the parent cgroup.

ENVIRONMENT VARIABLES

       CGROUP_LOGLEVEL
	      controls verbosity of the tool. Allowed values are DEBUG, INFO, WARNING or ERROR.

FILES

SEE ALSO

       cgrules.conf (5) cgexec (1) cgclassify (1)

Linux								    2009-03-15							       CGCREATE(1)
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