79 lines
2.8 KiB
C
79 lines
2.8 KiB
C
/*
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* Copyright (c) 1989 - 1991, Julianne Frances Haugh
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* Copyright (c) 1996 - 1999, Marek Michałkiewicz
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* Copyright (c) 2003 - 2006, Tomasz Kłoczko
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the copyright holders or contributors may not be used to
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* endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <config.h>
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#ident "$Id$"
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#include <pwd.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include "prototypes.h"
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#include "defines.h"
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#define BAD_SUBROOT2 "invalid root `%s' for user `%s'\n"
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#define NO_SUBROOT2 "no subsystem root `%s' for user `%s'\n"
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/*
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* subsystem - change to subsystem root
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*
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* A subsystem login is indicated by the presence of a "*" as
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* the first character of the login shell. The given home
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* directory will be used as the root of a new filesystem which
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* the user is actually logged into.
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*/
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void subsystem (const struct passwd *pw)
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{
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/*
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* The new root directory must begin with a "/" character.
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*/
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if (pw->pw_dir[0] != '/') {
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printf (_("Invalid root directory '%s'\n"), pw->pw_dir);
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SYSLOG ((LOG_WARN, BAD_SUBROOT2, pw->pw_dir, pw->pw_name));
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closelog ();
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exit (EXIT_FAILURE);
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}
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/*
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* The directory must be accessible and the current process
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* must be able to change into it.
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*/
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if ( (chdir (pw->pw_dir) != 0)
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|| (chroot (pw->pw_dir) != 0)) {
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(void) printf (_("Can't change root directory to '%s'\n"),
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pw->pw_dir);
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SYSLOG ((LOG_WARN, NO_SUBROOT2, pw->pw_dir, pw->pw_name));
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closelog ();
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exit (EXIT_FAILURE);
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}
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}
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