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Top Forums UNIX for Advanced & Expert Users Capture child processes and change return values question Post 302340928 by Corona688 on Tuesday 4th of August 2009 05:02:13 PM
Old 08-04-2009
Instead of hacking this at the system call level, why not put user you want to restrict into a chroot? They really, genuinely wouldn't have access to anything you didn't put in there.
 

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explain_chroot_or_die(3)				     Library Functions Manual					  explain_chroot_or_die(3)

NAME
explain_chroot_or_die - change root directory and report errors SYNOPSIS
#include <libexplain/chroot.h> void explain_chroot_or_die(const char *pathname); int explain_chroot_on_error(const char *pathname)) DESCRIPTION
The explain_chroot_or_die function is used to call the chroot(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_chroot(3) function, and then the process terminates by calling exit(EXIT_FAILURE). The explain_chroot_on_error function is used to call the chroot(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_chroot(3) function, but still returns to the caller. pathname The pathname, exactly as to be passed to the chroot(2) system call. RETURN VALUE
The explain_chroot_or_die function only returns on success, see chroot(2) for more information. On failure, prints an explanation and exits, it does not return. The explain_chroot_on_error function always returns the value return by the wrapped chroot(2) system call. EXAMPLE
The explain_chroot_or_die function is intended to be used in a fashion similar to the following example: explain_chroot_or_die(pathname); SEE ALSO
chroot(2) change root directory explain_chroot(3) explain chroot(2) errors exit(2) terminate the calling process COPYRIGHT
libexplain version 0.52 Copyright (C) 2009 Peter Miller explain_chroot_or_die(3)
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