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Full Discussion: Change to different user id inside a program
Top Forums UNIX for Dummies Questions & Answers Change to different user id inside a program Post 302529016 by DGPickett on Wednesday 8th of June 2011 10:57:46 AM
Old 06-08-2011
If you want to become the new user and process, execvp(), but if you just want to run it, sudo/su and system() or popen() or do your own pipe(), fork(), close(), dup(), execvp() for pipes to and from your new child process (which must be managed carefully not to lock up both writing or reading).
 

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LEARN ABOUT DEBIAN

cvsd-passwd

cvsd-passwd(8)						      System Manager's Manual						    cvsd-passwd(8)

NAME

       cvsd-passwd - generate password entries for repositories

SYNOPSIS

       cvsd-passwd REPOS [+|-]NAME...

DESCRIPTION

       cvsd-passwd adds, updates or deletes users from repository passwd files for use with cvsd.

OPTIONS

       REPOS  Specify  the  directory in which the repository is located. This argument can be the top of the repository, the CVSROOT directory or
	      even the passwd file in the CVSROOT directory.

       [+]USER[:SUSER]
	      Add or update the user to the CVSROOT/passwd file.  If the user does not exist a password for the user is  asked	and  the  user	is
	      added for use with cvsd.	If the user already exists a password for is asked and the password field is modified.

	      The :SUSER part can be user to change or set mapping to a system user.  If you do not specify anything, a reasonable default is used
	      based upon your cvsd configuration.  If you don't want to map the user to any specified system user you can specify an  empty  SUSER
	      and use 'USER:'.

       -USER  Remove the user from the CVSROOT/passwd file.

EXAMPLES

       Add an anoncvs user to access the given repository:
	   cvsd-passwd /var/lib/cvsd/myrepos +anoncvs
       If the user already exists, change the password.

       Remove a user from the repository passwd list:
	   cvsd-passwd /var/lib/cvsd/myrepos -foo

       Add a user and specify that cvs should remap this user to the joe system user:
	   cvsd-passwd /var/lib/cvsd/myrepos joecvs:joe
       Note that the user joe should be known in the system passwd file and that cvsd should be run as root or user joe for this to work.

SEE ALSO

       cvsd(8)

AUTHOR

       Arthur de Jong <arthur@arthurdejong.org>.

Version 1.0.24							     Jun 2012							    cvsd-passwd(8)
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