PAM_EXEC
PAM_EXEC
NAME
pam_exec − PAM module which calls an external
command
SYNOPSIS
|
pam_exec.so [debug] [expose_authtok] [seteuid] [quiet] [log=file] command [...] |
DESCRIPTION
pam_exec is a PAM module that can be used to run an external command.
The child´s environment is set to the current PAM environment list, as returned by pam_getenvlist(3) In addition, the following PAM items are exported as environment variables: PAM_RHOST, PAM_RUSER, PAM_SERVICE, PAM_TTY, PAM_USER and PAM_TYPE, which contains one of the module types: account, auth, password, open_session and close_session.
Commands called by pam_exec need to be aware of that the user can have controll over the environment.
OPTIONS
debug
Print debug information.
expose_authtok
During authentication the calling command can read the password from stdin(3).
log=file
The output of the command is appended to file
quiet
Per default pam_exec.so will echo the exit status of the external command if it fails. Specifying this option will suppress the message.
seteuid
Per default pam_exec.so will execute the external command with the real user ID of the calling process. Specifying this option means the command is run with the effective user ID.
MODULE TYPES
PROVIDED
All module types (auth, account,
password and session) are
provided.
RETURN
VALUES
PAM_SUCCESS
The external command was run successfully.
PAM_SERVICE_ERR
No argument or a wrong number of arguments were given.
PAM_SYSTEM_ERR
A system error occurred or the command to execute failed.
PAM_IGNORE
pam_setcred was called, which does not execute the command.
EXAMPLES
Add the following line to /etc/pam.d/passwd to rebuild the
NIS database after each local password
change:
password optional pam_exec.so seteuid /usr/bin/make −C /var/yp
This will execute the command
make −C /var/yp
with effective user ID.
SEE ALSO
pam.conf(5),
pam.d(5), pam(8)
AUTHOR
pam_exec was written by Thorsten Kukuk
<kukuk@thkukuk.de>.
Opportunity
Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.
Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.
Free Software
Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.
Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.
Free Books
The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.
Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.
Education
Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.
Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.
