04-16-2005
Run shell script as different user
I want to start off by saying thanks to everyone here, you're answers and suggestions are always very helpful.
I have a shell script which is invoked when an email is received. This shell script extracts any attachments that are sent with this email, and then runs a script which submits these files to a repository. The problem is that when the script is envoked, "daemon" is the owner of the files that are created, so the ci and co functions will not work properly. I'm trying to find a way where I can change the owner of the process when the script is envoked.
For example, when the script is envoked, the owner is "daemon", but I need to change the owner to "myUserName", so that when the files are created and the other scripts/commands are called, the system will think that "myUserName" is the person running all of the commands/scripts.
Is this at all possible?
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LEARN ABOUT REDHAT
postfix
POSTFIX(1) General Commands Manual POSTFIX(1)
NAME
postfix - Postfix control program
SYNOPSIS
postfix [-c config_dir] [-D] [-v] command
DESCRIPTION
This command is reserved for the super-user. To submit mail, use the Postfix sendmail command.
The postfix command controls the operation of the Postfix mail system: start or stop the master daemon, do a health check, and other main-
tenance.
The postfix command sets up a standardized environment and runs the postfix-script shell script to do the actual work.
The following commands are implemented:
check Validate the Postfix mail system configuration. Warn about bad directory/file ownership or permissions, and create missing directo-
ries.
start Start the Postfix mail system. This also runs the configuration check described above.
stop Stop the Postfix mail system in an orderly fashion. Running processes are allowed to terminate at their earliest convenience.
Note: in order to refresh the Postfix mail system after a configuration change, do not use the start and stop commands in succes-
sion. Use the reload command instead.
abort Stop the Postfix mail system abruptly. Running processes are signaled to stop immediately.
flush Force delivery: attempt to deliver every message in the deferred mail queue. Normally, attempts to deliver delayed mail happen at
regular intervals, the interval doubling after each failed attempt.
reload Re-read configuration files. Running processes terminate at their earliest convenience.
The following options are implemented:
-c config_dir
Read the main.cf and master.cf configuration files in the named directory instead of the default configuration directory. Use this
to distinguish between multiple Postfix instances on the same host.
-D (with postfix start only)
Run each Postfix daemon under control of a debugger as specified via the debugger_command configuration parameter.
-v Enable verbose logging for debugging purposes. Multiple -v options make the software increasingly verbose.
ENVIRONMENT
The postfix command sets the following environment variables:
MAIL_CONFIG
Directory with Postfix configuration files.
MAIL_VERBOSE
This is set when the -v command-line option is present.
MAIL_DEBUG
This is set when the -D command-line option is present.
CONFIGURATION PARAMETERS
The following main.cf configuration parameters are made available as process environment variables with the same names:
command_directory
Directory with Postfix administrative commands.
daemon_directory
Directory with Postfix daemon programs.
config_directory
Directory with Postfix configuration files and with administrative shell scripts.
queue_directory
The directory with Postfix queue files, with local inter-process communication endpoints, and with files needed for daemon programs
that run in the optional chrooted environment.
mail_owner
The owner of Postfix queue files and of most Postfix processes.
setgid_group
The group for mail submission and queue management commands.
sendmail_path
The full pathname for the Postfix sendmail command.
newaliases_path
The full pathname for the Postfix newaliases command.
mailq_path
The full pathname for the Postfix mailq command.
manpage_directory
The directory for the Postfix on-line manual pages.
sample_directory
The directory for the Postfix sample configuration files.
readme_directory
The directory for the Postfix README files.
Other configuration parameters
import_environment
List of names of environment parameters that can be imported from non-Postfix processes.
FILES
$config_directory/postfix-script, administrative commands
$config_directory/main.cf, configuration parameters
$config_directory/master.cf, Postfix daemon processes
SEE ALSO
master(8) Postfix master program
LICENSE
The Secure Mailer license must be distributed with this software.
AUTHOR(S)
Wietse Venema
IBM T.J. Watson Research
P.O. Box 704
Yorktown Heights, NY 10598, USA
POSTFIX(1)