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Full Discussion: calling UNIX commands C/C++
Top Forums Programming calling UNIX commands C/C++ Post 302296383 by Asteroid on Wednesday 11th of March 2009 05:01:50 AM
Old 03-11-2009
@pludi Thx for the reply. Please extend some more help to solve my problem.

Quote:
Why exactly isn't sudo an option? (Just asking to make sure you describe the right problem before we give the wrong answer)
well, Sudu is not an option because this utility is not available on the machines and more over we are willing to install it either.

Code:
As for your program: it doesn't need to know the root password, it only has to have the SUID bit set (like sudo or su).

So, how can i adopt SUID by setting the Bit. any help

Code:
If you meant to call su from your program, you'll have the same problem as others who posted about entering the root password from a shell script: 

probably not possible, as both su and sudo always try to read from the tty, not stdin.

so it mean, i cannot su - root in my program as it will tend to read from tty.
 

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GKSU(1) 							   User Commands							   GKSU(1)

NAME
gksu - GTK+ frontend for su and sudo SYNOPSIS
gksu gksu [-u <user>] [options] <command> gksudo [-u <user>] [options] <command> DESCRIPTION
This manual page documents briefly gksu and gksudo gksu is a frontend to su and gksudo is a frontend to sudo. Their primary purpose is to run graphical commands that need root without the need to run an X terminal emulator and using su directly. Notice that all the magic is done by the underlying library, libgksu. Also notice that the library will decide if it should use su or sudo as backend using the /apps/gksu/sudo-mode gconf key, if you call the gksu command. You can force the backend by using the gksudo command, or by using the --sudo-mode and --su-mode options. If no command is given, the gksu program will display a small window that allows you to type in a command to be run, and to select what user the program should be run as. The other options are disregarded, right now, in this mode. OPTIONS
--debug, -d Print information on the screen that might be useful for diagnosing and/or solving problems. --user <user>, -u <user> Call <command> as the specified user. --disable-grab, -g Disable the "locking" of the keyboard, mouse, and focus done by the program when asking for password. --prompt, -P Ask the user if they want to have their keyboard and mouse grabbed before doing so. --preserve-env, -k Preserve the current environments, does not set $HOME nor $PATH, for example. --login, -l Make this a login shell. Beware this may cause problems with the Xauthority magic. Run xhost to allow the target user to open win- dows on your display! --description <description|file>, -D <description|file> Provide a descriptive name for the command to be used in the default message, making it nicer. You can also provide the absolute path for a .desktop file. The Name key for will be used in this case. --message <message>, -m <message> Replace the standard message shown to ask for password for the argument passed to the option. Only use this if --description does not suffice. --print-pass, -p Ask gksu to print the password to stdout, just like ssh-askpass. Useful to use in scripts with programs that accept receiving the password on stdin. --su-mode, -w Force gksu to use su(1) as its backend for running the programs. --sudo-mode, -S Force gksu to use sudo(1) as its backend for running the programs. SEE ALSO
su(1), sudo(1) gksu version 2.0.x August 2006 GKSU(1)
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