+++ /dev/null
-# ChangeLog for Path Sandbox
-# Copyright 1999-2004 Gentoo Foundation; Distributed under the GPL v2
-# $Id: /var/cvsroot/gentoo-src/portage/src/sandbox-dev/Attic/ChangeLog,v 1.9 2004/10/04 14:08:46 vapier Exp $
-
- 16 Dec 2002; J Robert Ray <jrray@gentoo.org> Makefile libsandbox.c :
-
- Instead of parsing the SANDBOX_* env variables on each syscall, save the
- result in a global sbcontext pointer and cache the value of the env vars
- to detect later on if they have changed and need to be re-parsed. Works
- around bug 233.
-
- 16 Dec 2002; Martin Schlemmer <azarah@gentoo.org> create-localdecls :
-
- Fix memory leak for mips, bug #12236. Thanks to Torgeir Hansen <torgeir@trenger.ro>
- for this fix.
-
- 4 Dec 2002; J Robert Ray <jrray@gentoo.org> sandbox.h sandbox_futils.c :
-
- sandbox_futils defined a dirname() function that was masking the same
- function in glibc and was broken (e.g.: SANDBOX_DIR was being set to
- '/usr/lib/portage/bi/'). Fixed function to return expected results and
- renamed it to sb_dirname() to no longer mask the glibc function. Closes bug
- 11231.
-
- 4 Dec 2002; Martin Schlemmer <azarah@gentoo.org> :
-
- Fix a segfault in libsandbox.c if canonicalize() was called with
- first parameter = NULL.
-
- 1 Sep 2002; Martin Schlemmer <azarah@gentoo.org> :
-
- Fix my braindead 'return 1;' in a void function. Updated sandbox.c,
- cleanup() for this.
-
- Change cleanup() in sandbox.c not to exit with fail status if
- the pidsfile is missing. We really should still display sandbox
- violations if they occured.
-
- 31 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
-
- Update cleanup() in sandbox.c to remove the PIDSFILE if this is
- the last sandbox running.
-
- 25 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
-
- Major cleanups to mainly libsandbox.c again.
-
- 22 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
-
- Add copyrights to sandbox.h and sandbox_futils.h. If wrong, the
- parties involved should please contact me so that we can fix it.
-
- Add opendir wrapper to libsandbox.c.
-
- 21 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
-
- Do some more cleanups to ecanonicalize(), as it dropped filenames in
- rare cases (after my symlink cleanups), and caused glibc to bork.
- These fixes went into canonicalize.c.
-
- 20 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
-
- Fix spawn_shell() and main() in sandbox.c to properly return fail
- status.
-
- 19 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
-
- The new canonicalize() function in libsandbox.c also resolved symlinks,
- which caused on cleaning sandbox errors if the symlink pointed to a
- file in the live root. Ripped out canonicalize() and realpath() from
- glibc; removed the symlink stuff, and changed them to ecanonicalize()
- and erealpath().
-
- 18 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
-
- Ripped out all the wrappers, and implemented those of InstallWatch.
- Losts of cleanups and bugfixes. Implement a execve that forces
- $LIBSANDBOX in $LD_PRELOAD. We can now thus do away with the feared
- /etc/ld.so.preload (*g*) ... Made the needed changes to sandbox.c,
- sandbox.h and sandbox_futils.c. Rewrote the Makefile for most
- parts; it now have an install target.
-
- Reformat the whole thing to look somewhat like the reworked sandbox.c
- and new sandbox.h and sandbox_futils.c from:
-
- Brad House <brad@mainstreetsoftworks.com>.
-
- Additional Copyrights now due to the InstallWatch code:
-
- Copyright (C) 1998-9 Pancrazio `Ezio' de Mauro <p@demauro.net>
-
+++ /dev/null
-# Copyright (C) 2001 Geert Bevin, Uwyn, http://www.uwyn.com
-# Distributed under the terms of the GNU General Public License, v2 or later
-# Author : Geert Bevin <gbevin@uwyn.com>
-#
-# Modified 15 Apr 2002 Jon Nelson <jnelson@gentoo.org>
-# Clean up Makefile somewhat, and use make's implicit rules
-#
-# Modified 19 Aug 2002; Martin Schlemmer <azarah@gentoo.org>
-# Major rewrite to support new stuff
-#
-# $Id: /var/cvsroot/gentoo-src/portage/src/sandbox-dev/Attic/Makefile,v 1.3 2002/12/16 22:28:05 jrray Exp $
-
-CC = gcc
-LD = ld
-CFLAGS =
-OBJ_DEFINES = -D_GNU_SOURCE -DPIC -fPIC -D_REENTRANT
-LIBS =
-LDFLAGS =
-DESTDIR =
-
-TARGETS = libsandbox.so sandbox
-
-all: $(TARGETS)
-
-sandbox: sandbox.o sandbox_futils.o
- $(CC) $^ -ldl -lc -o $@
-
-sandbox.o: sandbox.c sandbox.h
- $(CC) $(CFLAGS) -Wall -c sandbox.c
-
-sandbox_futils.o: sandbox_futils.c sandbox.h
- $(CC) $(CFLAGS) -Wall -c $(OBJ_DEFINES) sandbox_futils.c
-
-libsandbox.so: libsandbox.o sandbox_futils.o canonicalize.o
- $(LD) $^ -shared -fPIC -ldl -lc -lpthread -o $@
-
-libsandbox.o: libsandbox.c localdecls.h
- $(CC) $(CFLAGS) -Wall -c $(OBJ_DEFINES) libsandbox.c
-
-canonicalize.o: canonicalize.c
- $(CC) $(CFLAGS) -Wall -c $(OBJ_DEFINES) canonicalize.c
-
-localdecls.h: create-localdecls libctest.c
- ./create-localdecls
-
-
-install: all
- install -d -m 0755 $(DESTDIR)/lib
- install -d -m 0755 $(DESTDIR)/usr/lib/portage/bin
- install -d -m 0755 $(DESTDIR)/usr/lib/portage/lib
- install -m 0755 libsandbox.so $(DESTDIR)/lib
- install -m 0755 sandbox $(DESTDIR)/usr/lib/portage/bin
- install -m 0644 sandbox.bashrc $(DESTDIR)/usr/lib/portage/lib
-
-
-clean:
- rm -f $(TARGETS)
- rm -f *.o *~ core
- rm -f localdecls.h
-
-
-# vim:expandtab noai:cindent ai
+++ /dev/null
-/* Return the canonical absolute name of a given file.
- Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
-
-/*
- * $Id: /var/cvsroot/gentoo-src/portage/src/sandbox-dev/Attic/canonicalize.c,v 1.2 2002/08/26 03:28:30 azarah Exp $
- */
-
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <limits.h>
-#include <sys/param.h>
-#include <sys/stat.h>
-#include <errno.h>
-#include <stddef.h>
-
-#ifndef __set_errno
-# define __set_errno(val) errno = (val)
-#endif
-
-/* Return the canonical absolute name of file NAME. A canonical name
- does not contain any `.', `..' components nor any repeated path
- separators ('/') or symlinks. All path components must exist. If
- RESOLVED is null, the result is malloc'd; otherwise, if the
- canonical name is PATH_MAX chars or more, returns null with `errno'
- set to ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars,
- returns the name in RESOLVED. If the name cannot be resolved and
- RESOLVED is non-NULL, it contains the path of the first component
- that cannot be resolved. If the path can be resolved, RESOLVED
- holds the same value as the value returned. */
-
-/* Modified: 19 Aug 2002; Martin Schlemmer <azarah@gentoo.org>
- *
- * Cleaned up unneeded stuff, and change so that it will not
- * resolve symlinks. Also prepended a 'e' to functions that
- * I did not rip out.
- *
- */
-
-static char *
-ecanonicalize (const char *name, char *resolved)
-{
- char *rpath, *dest;
- const char *start, *end, *rpath_limit;
- long int path_max;
-
- if (name == NULL)
- {
- /* As per Single Unix Specification V2 we must return an error if
- either parameter is a null pointer. We extend this to allow
- the RESOLVED parameter to be NULL in case the we are expected to
- allocate the room for the return value. */
- __set_errno (EINVAL);
- return NULL;
- }
-
- if (name[0] == '\0')
- {
- /* As per Single Unix Specification V2 we must return an error if
- the name argument points to an empty string. */
- __set_errno (ENOENT);
- return NULL;
- }
-
-#ifdef PATH_MAX
- path_max = PATH_MAX;
-#else
- path_max = pathconf (name, _PC_PATH_MAX);
- if (path_max <= 0)
- path_max = 1024;
-#endif
-
- rpath = resolved ? alloca (path_max) : malloc (path_max);
- rpath_limit = rpath + path_max;
-
- if (name[0] != '/')
- {
- if (!getcwd (rpath, path_max))
- {
- rpath[0] = '\0';
- goto error;
- }
- dest = strchr (rpath, '\0');
- }
- else
- {
- rpath[0] = '/';
- dest = rpath + 1;
- }
-
- for (start = end = name; *start; start = end)
- {
- /* Skip sequence of multiple path-separators. */
- while (*start == '/')
- ++start;
-
- /* Find end of path component. */
- for (end = start; *end && *end != '/'; ++end)
- /* Nothing. */;
-
- if (end - start == 0)
- break;
- else if (end - start == 1 && start[0] == '.')
- /* nothing */;
- else if (end - start == 2 && start[0] == '.' && start[1] == '.')
- {
- /* Back up to previous component, ignore if at root already. */
- if (dest > rpath + 1)
- while ((--dest)[-1] != '/');
- }
- else
- {
- size_t new_size;
-
- if (dest[-1] != '/')
- *dest++ = '/';
-
- if (dest + (end - start) >= rpath_limit)
- {
- ptrdiff_t dest_offset = dest - rpath;
-
- if (resolved)
- {
- __set_errno (ENAMETOOLONG);
- if (dest > rpath + 1)
- dest--;
- *dest = '\0';
- goto error;
- }
- new_size = rpath_limit - rpath;
- if (end - start + 1 > path_max)
- new_size += end - start + 1;
- else
- new_size += path_max;
- rpath = realloc (rpath, new_size);
- rpath_limit = rpath + new_size;
- if (rpath == NULL)
- return NULL;
-
- dest = rpath + dest_offset;
- }
-
- dest = __mempcpy (dest, start, end - start);
- *dest = '\0';
-
- }
- }
-#if 0
- if (dest > rpath + 1 && dest[-1] == '/')
- --dest;
-#endif
- *dest = '\0';
-
- return resolved ? memcpy (resolved, rpath, dest - rpath + 1) : rpath;
-
-error:
- if (resolved)
- strcpy (resolved, rpath);
- else
- free (rpath);
- return NULL;
-}
-
-
-char *
-erealpath (const char *name, char *resolved)
-{
- if (resolved == NULL)
- {
- __set_errno (EINVAL);
- return NULL;
- }
-
- return ecanonicalize (name, resolved);
-}
-
-
-// vim:expandtab noai:cindent ai
+++ /dev/null
-#!/bin/sh
-
-# This is a quick'n'dirty hack to make the program behave correctly
-# under different systems.
-# Example:
-# when using libc5, (f)trucate's offset argument type is size_t with
-# libc5, but it's off_t with libc6 (glibc2).
-#
-# Uhm... time to learn GNU autoconf :-)
-#
-# $Id: /var/cvsroot/gentoo-src/portage/src/sandbox-dev/Attic/create-localdecls,v 1.2 2002/12/16 19:19:27 azarah Exp $
-
-OUTFILE='localdecls.h'
-
-# if your arch needs to dlopen() glibc, add it here separated by space :]
-BROKEN_RTLD_ARCHLIST="mips"
-
-echo '/* This file is automatically generated *' > $OUTFILE
-echo ' * Modify create-localdecls instead of this */' >> $OUTFILE
-echo >> $OUTFILE
-echo '#ifndef __LOCALDECLS_H_' >> $OUTFILE
-echo '#define __LOCALDECLS_H_' >> $OUTFILE
-echo >> $OUTFILE
-
-###
-###
-###
-
-echo -n 'Checking truncate argument type... '
-if grep -q 'truncate.*size_t' /usr/include/unistd.h ; then
- echo 'size_t'
- echo '#define TRUNCATE_T size_t' >> $OUTFILE
-else
- echo 'off_t' # At least, I HOPE it's off_t :-)
- echo '#define TRUNCATE_T off_t' >> $OUTFILE
-fi
-
-###
-###
-###
-
-echo -n 'Checking libc version... '
-gcc -Wall -o libctest libctest.c
-VERSION=`ldd libctest | grep libc\\.so | awk '{print $1}'`
-rm libctest
-echo $VERSION
-echo "#define LIBC_VERSION \"$VERSION\"" >> $OUTFILE
-if test "$VERSION" = 'libc.so.5' ; then
- echo '#define BROKEN_RTLD_NEXT' >> $OUTFILE
- echo '#define LIBC 5' >> $OUTFILE
-else
- # for the arch's that need to dlopen() libc to fetch real funcs!
- # 16.12.02 -Torgeir Hansen <torgeir@trenger.ro>
- MYARCH=`/bin/uname -m`
- for x in $BROKEN_RTLD_ARCHLIST; do
- if [ $x = $MYARCH ]; then
- echo '#define BROKEN_RTLD_NEXT' >> $OUTFILE
- fi
- done
-
-fi
-
-if test "$VERSION" = 'libc.so.6' ; then
- echo -n 'Checking glibc subversion... '
- tmp="`ldd /bin/sh | grep libc.so 2> /dev/null`"
- LibcPath=`expr "$tmp" : '[^/]*\(/[^ ]*\)'`
- tmp="`strings $LibcPath | grep -i 'c library'`"
- OsLibcMajor=`expr "$tmp" : '.* \([0-9][0-9]*\)'`
- OsLibcMinor=`expr "$tmp" : '.* [0-9][0-9]*\.\([0-9][0-9]*\)'`
- case "$OsLibcMajor" in
- 2)
- # 2 is the glibc version
- case "$OsLibcMinor" in
- 0)
- echo '#define GLIBC_MINOR 0' >> $OUTFILE
- SUBVERSION='glibc-2.0' ;;
- 1)
- echo '#define GLIBC_MINOR 1' >> $OUTFILE
- SUBVERSION='glibc-2.1' ;;
- 2)
- echo '#define GLIBC_MINOR 2' >> $OUTFILE
- SUBVERSION='glibc-2.2' ;;
- *)
- echo 'Treated as glibc >= 2.1 (finger crossed)'
- echo '#define GLIBC_MINOR 1' >> $OUTFILE
- SUBVERSION='glibc-2.1' ;;
- esac
- ;;
- esac
-fi
-
-echo >> $OUTFILE
-echo '#endif' >> $OUTFILE
-echo
-
+++ /dev/null
-/* Dummy program to check your libc version */
-
-int main(void) {
- return 0;
-}
-
+++ /dev/null
-/*
- * Path sandbox for the gentoo linux portage package system, initially
- * based on the ROCK Linux Wrapper for getting a list of created files
- *
- * to integrate with bash, bash should have been built like this
- *
- * ./configure --prefix=<prefix> --host=<host> --without-gnu-malloc
- *
- * it's very important that the --enable-static-link option is NOT specified
- *
- * Copyright (C) 2001 Geert Bevin, Uwyn, http://www.uwyn.com
- * Distributed under the terms of the GNU General Public License, v2 or later
- * Author : Geert Bevin <gbevin@uwyn.com>
- *
- * Post Bevin leaving Gentoo ranks:
- * --------------------------------
- * Ripped out all the wrappers, and implemented those of InstallWatch.
- * Losts of cleanups and bugfixes. Implement a execve that forces $LIBSANDBOX
- * in $LD_PRELOAD. Reformat the whole thing to look somewhat like the reworked
- * sandbox.c from Brad House <brad@mainstreetsoftworks.com>.
- *
- * Martin Schlemmer <azarah@gentoo.org> (18 Aug 2002)
- *
- * Partly Copyright (C) 1998-9 Pancrazio `Ezio' de Mauro <p@demauro.net>,
- * as some of the InstallWatch code was used.
- *
- *
- * $Id: /var/cvsroot/gentoo-src/portage/src/sandbox-dev/Attic/libsandbox.c,v 1.4 2002/12/16 22:28:05 jrray Exp $
- *
- */
-
-/* Uncomment below to enable wrapping of mknod().
- * This is broken currently. */
-/* #define WRAP_MKNOD */
-
-
-#define open xxx_open
-#define open64 xxx_open64
-
-/* Wrapping mknod, do not have any effect, and
- * wrapping __xmknod causes calls to it to segfault
- */
-#ifdef WRAP_MKNOD
-# define __xmknod xxx___xmknod
-#endif
-
-#include <dirent.h>
-#include <dlfcn.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/file.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <sys/param.h>
-#include <unistd.h>
-#include <utime.h>
-#include <semaphore.h>
-
-#ifdef WRAP_MKNOD
-# undef __xmknod
-#endif
-
-#undef open
-#undef open64
-
-#include "localdecls.h"
-#include "sandbox.h"
-
-#define PIDS_FILE "/tmp/sandboxpids.tmp"
-
-#define FUNCTION_SANDBOX_SAFE(func, path) \
- ((0 == is_sandbox_on()) || (1 == before_syscall(func, path)))
-
-#define FUNCTION_SANDBOX_SAFE_INT(func, path, flags) \
- ((0 == is_sandbox_on()) || (1 == before_syscall_open_int(func, path, flags)))
-
-#define FUNCTION_SANDBOX_SAFE_CHAR(func, path, mode) \
- ((0 == is_sandbox_on()) || (1 == before_syscall_open_char(func, path, mode)))
-
-
-/* Macro to check if a wrapper is defined, if not
- * then try to resolve it again. */
-#define check_dlsym(name) \
-{ \
- int old_errno=errno; \
- if (!true_ ## name) true_ ## name=get_dlsym(#name); \
- errno=old_errno; \
-}
-
-static char sandbox_lib[255];
-
-typedef struct {
- char *last_env;
- int count;
- char **strs;
-} sbprefix_t;
-
-typedef struct {
- int show_access_violation;
- sbprefix_t deny;
- sbprefix_t read;
- sbprefix_t write;
- sbprefix_t predict;
-} sbcontext_t;
-
-/* glibc modified realpath() functions */
-char *erealpath (const char *name, char *resolved);
-
-static void init_wrappers(void);
-static void *get_dlsym(const char *);
-static void canonicalize(const char *, char *);
-static int check_access(sbcontext_t *, const char *, const char *);
-static int check_syscall(sbcontext_t *, const char *, const char *);
-static int before_syscall(const char *, const char *);
-static int before_syscall_open_int(const char *, const char *, int);
-static int before_syscall_open_char(const char *, const char *, const char *);
-static void clean_env_entries(sbprefix_t *);
-static void init_context(sbcontext_t *);
-static void init_env_entries(sbprefix_t *, char *);
-static char* filter_path(const char*);
-static int is_sandbox_on();
-static int is_sandbox_pid();
-
-/* Wrapped functions */
-
-extern int chmod(const char *, mode_t);
-static int(*true_chmod)(const char *, mode_t);
-extern int chown(const char *, uid_t, gid_t);
-static int(*true_chown)(const char *, uid_t, gid_t);
-extern int creat(const char *, mode_t);
-static int(*true_creat)(const char *, mode_t);
-extern FILE *fopen(const char *,const char*);
-static FILE *(*true_fopen)(const char *,const char*);
-extern int lchown(const char *, uid_t, gid_t);
-static int(*true_lchown)(const char *, uid_t, gid_t);
-extern int link(const char *, const char *);
-static int(*true_link)(const char *, const char *);
-extern int mkdir(const char *, mode_t);
-static int(*true_mkdir)(const char *, mode_t);
-extern DIR *opendir(const char *);
-static DIR *(*true_opendir)(const char *);
-#ifdef WRAP_MKNOD
-extern int __xmknod(const char *, mode_t, dev_t);
-static int(*true___xmknod)(const char *, mode_t, dev_t);
-#endif
-extern int open(const char *, int, ...);
-static int(*true_open)(const char *, int, ...);
-extern int rename(const char *, const char *);
-static int(*true_rename)(const char *, const char *);
-extern int rmdir(const char *);
-static int(*true_rmdir)(const char *);
-extern int symlink(const char *, const char *);
-static int(*true_symlink)(const char *, const char *);
-extern int truncate(const char *, TRUNCATE_T);
-static int(*true_truncate)(const char *, TRUNCATE_T);
-extern int unlink(const char *);
-static int(*true_unlink)(const char *);
-
-#if (GLIBC_MINOR >= 1)
-
-extern int creat64(const char *, __mode_t);
-static int(*true_creat64)(const char *, __mode_t);
-extern FILE *fopen64(const char *,const char *);
-static FILE *(*true_fopen64)(const char *,const char *);
-extern int open64(const char *, int, ...);
-static int(*true_open64)(const char *, int, ...);
-extern int truncate64(const char *, __off64_t);
-static int(*true_truncate64)(const char *, __off64_t);
-
-#endif
-
-extern int execve(const char *filename, char *const argv [], char *const envp[]);
-static int (*true_execve)(const char *, char *const [], char *const []);
-
-static sbcontext_t* sbcontext = NULL;
-static sem_t ctxsem;
-
-/*
- * Initialize the shabang
- */
-
-static void init_wrappers(void)
-{
- void *libc_handle = NULL;
-
-#ifdef BROKEN_RTLD_NEXT
-// printf ("RTLD_LAZY");
- libc_handle = dlopen(LIBC_VERSION, RTLD_LAZY);
-#else
-// printf ("RTLD_NEXT");
- libc_handle = RTLD_NEXT;
-#endif
-
- true_chmod = dlsym(libc_handle, "chmod");
- true_chown = dlsym(libc_handle, "chown");
- true_creat = dlsym(libc_handle, "creat");
- true_fopen = dlsym(libc_handle, "fopen");
- true_lchown = dlsym(libc_handle, "lchown");
- true_link = dlsym(libc_handle, "link");
- true_mkdir = dlsym(libc_handle, "mkdir");
- true_opendir = dlsym(libc_handle, "opendir");
-#ifdef WRAP_MKNOD
- true___xmknod = dlsym(libc_handle, "__xmknod");
-#endif
- true_open = dlsym(libc_handle, "open");
- true_rename = dlsym(libc_handle, "rename");
- true_rmdir = dlsym(libc_handle, "rmdir");
- true_symlink = dlsym(libc_handle, "symlink");
- true_truncate = dlsym(libc_handle, "truncate");
- true_unlink = dlsym(libc_handle, "unlink");
-
-#if (GLIBC_MINOR >= 1)
- true_creat64 = dlsym(libc_handle, "creat64");
- true_fopen64 = dlsym(libc_handle, "fopen64");
- true_open64 = dlsym(libc_handle, "open64");
- true_truncate64 = dlsym(libc_handle, "truncate64");
-#endif
-
- true_execve = dlsym(libc_handle, "execve");
-}
-
-void _init(void)
-{
- int old_errno = errno;
- char *tmp_string = NULL;
-
- if (sem_init(&ctxsem, 0, 1)) {
- fprintf(stderr, "Failed to create semaphore\n");
- abort();
- }
-
- init_wrappers();
-
- /* Get the path and name to this library */
- tmp_string = get_sandbox_lib("/");
- strncpy(sandbox_lib, tmp_string, 254);
-
- if (tmp_string) free(tmp_string);
- tmp_string = NULL;
-
- errno = old_errno;
-}
-
-void _fini(void)
-{
- if (sbcontext) {
- clean_env_entries(&sbcontext->deny);
- clean_env_entries(&sbcontext->read);
- clean_env_entries(&sbcontext->write);
- clean_env_entries(&sbcontext->predict);
- free(sbcontext);
- sbcontext = NULL;
- }
-
- /* free the semaphore */
- sem_destroy(&ctxsem);
-}
-
-static void canonicalize(const char *path, char *resolved_path)
-{
- int old_errno = errno;
-
- /* If path == NULL, return or we get a segfault */
- if (NULL == path) return;
-
- if(!erealpath(path, resolved_path) && (path[0] != '/')) {
- /* The path could not be canonicalized, append it
- * to the current working directory if it was not
- * an absolute path
- */
- getcwd(resolved_path, MAXPATHLEN - 2);
- strcat(resolved_path, "/");
- strncat(resolved_path, path, MAXPATHLEN - 1 - strlen(resolved_path));
- erealpath(resolved_path, resolved_path);
- }
-
- errno = old_errno;
-}
-
-static void *get_dlsym(const char *symname)
-{
- void *libc_handle = NULL;
- void *symaddr = NULL;
-
-#ifdef BROKEN_RTLD_NEXT
- libc_handle = dlopen(LIBC_VERSION, RTLD_LAZY);
- if (!libc_handle) {
- printf("libsandbox.so: Can't dlopen libc: %s\n", dlerror());
- abort();
- }
-#else
- libc_handle = RTLD_NEXT;
-#endif
-
- symaddr = dlsym(libc_handle, symname);
- if (!symaddr) {
- printf("libsandbox.so: Can't resolve %s: %s\n", symname, dlerror());
- abort();
- }
-
- return symaddr;
-}
-
-/*
- * Wrapper Functions
- */
-
-int chmod(const char *path, mode_t mode)
-{
- int result = -1;
- char canonic[MAXPATHLEN];
-
- canonicalize(path, canonic);
-
- if FUNCTION_SANDBOX_SAFE("chmod", canonic) {
- check_dlsym(chmod);
- result = true_chmod(path, mode);
- }
-
- return result;
-}
-
-int chown(const char *path, uid_t owner, gid_t group)
-{
- int result = -1;
- char canonic[MAXPATHLEN];
-
- canonicalize(path, canonic);
-
- if FUNCTION_SANDBOX_SAFE("chown", canonic) {
- check_dlsym(chown);
- result = true_chown(path, owner, group);
- }
-
- return result;
-}
-
-int creat(const char *pathname, mode_t mode)
-{
-/* Is it a system call? */
- int result = -1;
- char canonic[MAXPATHLEN];
-
- canonicalize(pathname, canonic);
-
- if FUNCTION_SANDBOX_SAFE("creat", canonic) {
- check_dlsym(open);
- result = true_open(pathname, O_CREAT | O_WRONLY | O_TRUNC, mode);
- }
-
- return result;
-}
-
-FILE *fopen(const char *pathname, const char *mode)
-{
- FILE *result = NULL;
- char canonic[MAXPATHLEN];
-
- canonicalize(pathname, canonic);
-
- if FUNCTION_SANDBOX_SAFE_CHAR("fopen", canonic, mode) {
- check_dlsym(fopen);
- result = true_fopen(pathname,mode);
- }
-
- return result;
-}
-
-int lchown(const char *path, uid_t owner, gid_t group)
-{
-/* Linux specific? */
- int result = -1;
- char canonic[MAXPATHLEN];
-
- canonicalize(path, canonic);
-
- if FUNCTION_SANDBOX_SAFE("lchown", canonic) {
- check_dlsym(chown);
- result = true_chown(path, owner, group);
- }
-
- return result;
-}
-
-int link(const char *oldpath, const char *newpath)
-{
- int result = -1;
- char old_canonic[MAXPATHLEN], new_canonic[MAXPATHLEN];
-
- canonicalize(oldpath, old_canonic);
- canonicalize(newpath, new_canonic);
-
- if FUNCTION_SANDBOX_SAFE("link", new_canonic) {
- check_dlsym(link);
- result = true_link(oldpath, newpath);
- }
-
- return result;
-}
-
-int mkdir(const char *pathname, mode_t mode)
-{
- int result = -1;
- char canonic[MAXPATHLEN];
-
- canonicalize(pathname, canonic);
-
- if FUNCTION_SANDBOX_SAFE("mkdir", canonic) {
- check_dlsym(mkdir);
- result = true_mkdir(pathname, mode);
- }
-
- return result;
-}
-
-DIR *opendir(const char *name)
-{
- DIR *result = NULL;
- char canonic[MAXPATHLEN];
-
- canonicalize(name, canonic);
-
- if FUNCTION_SANDBOX_SAFE("opendir", canonic) {
- check_dlsym(opendir);
- result = true_opendir(name);
- }
-
- return result;
-}
-
-#ifdef WRAP_MKNOD
-
-int __xmknod(const char *pathname, mode_t mode, dev_t dev)
-{
- int result = -1;
- char canonic[MAXPATHLEN];
-
- canonicalize(pathname, canonic);
-
- if FUNCTION_SANDBOX_SAFE("__xmknod", canonic) {
- check_dlsym(__xmknod);
- result = true___xmknod(pathname, mode, dev);
- }
-
- return result;
-}
-
-#endif
-
-int open(const char *pathname, int flags, ...)
-{
-/* Eventually, there is a third parameter: it's mode_t mode */
- va_list ap;
- mode_t mode = 0;
- int result = -1;
- char canonic[MAXPATHLEN];
-
- if (flags & O_CREAT) {
- va_start(ap, flags);
- mode = va_arg(ap, mode_t);
- va_end(ap);
- }
-
- canonicalize(pathname, canonic);
-
- if FUNCTION_SANDBOX_SAFE_INT("open", canonic, flags) {
- /* We need to resolve open() realtime in some cases,
- * else we get a segfault when running /bin/ps, etc
- * in a sandbox */
- check_dlsym(open);
- result=true_open(pathname, flags, mode);
- }
-
- return result;
-}
-
-int rename(const char *oldpath, const char *newpath)
-{
- int result = -1;
- char old_canonic[MAXPATHLEN], new_canonic[MAXPATHLEN];
-
- canonicalize(oldpath, old_canonic);
- canonicalize(newpath, new_canonic);
-
- if FUNCTION_SANDBOX_SAFE("rename", new_canonic) {
- check_dlsym(rename);
- result = true_rename(oldpath, newpath);
- }
-
- return result;
-}
-
-int rmdir(const char *pathname)
-{
- int result = -1;
- char canonic[MAXPATHLEN];
-
- canonicalize(pathname, canonic);
-
- if FUNCTION_SANDBOX_SAFE("rmdir", canonic) {
- check_dlsym(rmdir);
- result = true_rmdir(pathname);
- }
-
- return result;
-}
-
-int symlink(const char *oldpath, const char *newpath)
-{
- int result = -1;
- char old_canonic[MAXPATHLEN], new_canonic[MAXPATHLEN];
-
- canonicalize(oldpath, old_canonic);
- canonicalize(newpath, new_canonic);
-
- if FUNCTION_SANDBOX_SAFE("symlink", new_canonic) {
- check_dlsym(symlink);
- result = true_symlink(oldpath, newpath);
- }
-
- return result;
-}
-
-int truncate(const char *path, TRUNCATE_T length)
-{
- int result = -1;
- char canonic[MAXPATHLEN];
-
- canonicalize(path, canonic);
-
- if FUNCTION_SANDBOX_SAFE("truncate", canonic) {
- check_dlsym(truncate);
- result = true_truncate(path, length);
- }
-
- return result;
-}
-
-int unlink(const char *pathname)
-{
- int result = -1;
- char canonic[MAXPATHLEN];
-
- canonicalize(pathname, canonic);
-
- if FUNCTION_SANDBOX_SAFE("unlink", canonic) {
- check_dlsym(unlink);
- result = true_unlink(pathname);
- }
-
- return result;
-}
-
-#if (GLIBC_MINOR >= 1)
-
-int creat64(const char *pathname, __mode_t mode)
-{
-/* Is it a system call? */
- int result = -1;
- char canonic[MAXPATHLEN];
-
- canonicalize(pathname, canonic);
-
- if FUNCTION_SANDBOX_SAFE("creat64", canonic) {
- check_dlsym(open64);
- result = true_open64(pathname, O_CREAT | O_WRONLY | O_TRUNC, mode);
- }
-
- return result;
-}
-
-FILE *fopen64(const char *pathname, const char *mode)
-{
- FILE *result = NULL;
- char canonic[MAXPATHLEN];
-
- canonicalize(pathname, canonic);
-
- if FUNCTION_SANDBOX_SAFE_CHAR("fopen64", canonic, mode) {
- check_dlsym(fopen64);
- result = true_fopen(pathname,mode);
- }
-
- return result;
-}
-
-int open64(const char *pathname, int flags, ...)
-{
-/* Eventually, there is a third parameter: it's mode_t mode */
- va_list ap;
- mode_t mode = 0;
- int result = -1;
- char canonic[MAXPATHLEN];
-
- if (flags & O_CREAT) {
- va_start(ap, flags);
- mode = va_arg(ap, mode_t);
- va_end(ap);
- }
-
- canonicalize(pathname, canonic);
-
- if FUNCTION_SANDBOX_SAFE_INT("open64", canonic, flags) {
- check_dlsym(open64);
- result=true_open64(pathname, flags, mode);
- }
-
- return result;
-}
-
-int truncate64(const char *path, __off64_t length)
-{
- int result = -1;
- char canonic[MAXPATHLEN];
-
- canonicalize(path, canonic);
-
- if FUNCTION_SANDBOX_SAFE("truncate64", canonic) {
- check_dlsym(truncate64);
- result = true_truncate64(path, length);
- }
-
- return result;
-}
-
-#endif /* GLIBC_MINOR >= 1 */
-
-/*
- * Exec Wrappers
- */
-
-int execve(const char *filename, char *const argv [], char *const envp[])
-{
- int old_errno = errno;
- int result = -1;
- int count = 0;
- char canonic[MAXPATHLEN];
- char *old_envp = NULL;
- char *new_envp = NULL;
-
- canonicalize(filename, canonic);
-
- if FUNCTION_SANDBOX_SAFE("execve", canonic) {
- while (envp[count] != NULL) {
- if (strstr(envp[count], "LD_PRELOAD=") == envp[count]) {
- if (NULL != strstr(envp[count], sandbox_lib)) {
- break;
- } else {
- const int max_envp_len = strlen(envp[count]) + strlen(sandbox_lib) + 1;
-
- /* Backup envp[count], and set it to our own one which
- * contains sandbox_lib */
- old_envp = envp[count];
- new_envp = strndupa(old_envp, max_envp_len - 1);
-
- /* LD_PRELOAD already have variables other than sandbox_lib,
- * thus we have to add sandbox_lib via a white space. */
- if (0 != strcmp(envp[count], "LD_PRELOAD=")) {
- strncpy(new_envp + strlen(old_envp), ":",
- max_envp_len - strlen(new_envp));
- strncpy(new_envp + strlen(old_envp) + 1, sandbox_lib,
- max_envp_len - strlen(new_envp));
- } else {
- strncpy(new_envp + strlen(old_envp), sandbox_lib,
- max_envp_len - strlen(new_envp));
- }
-
- /* Valid string? */
- new_envp[max_envp_len] = '\0';
-
- /* envp[count] = new_envp;
- *
- * Get rid of the "read-only" warnings */
- memcpy((void *)&envp[count], &new_envp, sizeof(new_envp));
-
- break;
- }
- }
- count++;
- }
-
- errno = old_errno;
- check_dlsym(execve);
- result = true_execve(filename, argv, envp);
- old_errno = errno;
-
- if (old_envp) {
- /* Restore envp[count] again.
- *
- * envp[count] = old_envp; */
- memcpy((void *)&envp[count], &old_envp, sizeof(old_envp));
- old_envp = NULL;
- }
- }
-
- errno = old_errno;
-
- return result;
-}
-
-/*
- * Internal Functions
- */
-
-#if (GLIBC_MINOR == 1)
-
-/* This hack is needed for glibc 2.1.1 (and others?)
- * (not really needed, but good example) */
-extern int fclose(FILE *);
-static int (*true_fclose)(FILE *) = NULL;
-int fclose(FILE *file)
-{
- int result = - 1;
-
- check_dlsym(fclose);
- result = true_fclose(file);
-
- return result;
-}
-
-#endif /* GLIBC_MINOR == 1 */
-
-static void init_context(sbcontext_t* context)
-{
- memset(context, 0, sizeof(sbcontext_t));
- context->show_access_violation = 1;
-}
-
-static int is_sandbox_pid()
-{
- int old_errno = errno;
- int result = 0;
- FILE* pids_stream = NULL;
- int pids_file = -1;
- int current_pid = 0;
- int tmp_pid = 0;
-
- init_wrappers();
-
- pids_stream = true_fopen(PIDS_FILE, "r");
-
- if (NULL == pids_stream) {
- perror(">>> pids file fopen");
- }
- else
- {
- pids_file = fileno(pids_stream);
-
- if (pids_file < 0) {
- perror(">>> pids file fileno");
- } else {
- current_pid = getpid();
-
- while (EOF != fscanf(pids_stream, "%d\n", &tmp_pid)) {
- if (tmp_pid == current_pid) {
- result = 1;
- break;
- }
- }
- }
- if (EOF == fclose(pids_stream)) {
- perror(">>> pids file fclose");
- }
- pids_stream = NULL;
- pids_file = -1;
- }
-
- errno = old_errno;
-
- return result;
-}
-
-static void clean_env_entries(sbprefix_t* prefix)
-{
- int old_errno = errno;
- int i = 0;
-
- if (NULL != prefix->strs) {
- for (i = 0; i < prefix->count; i++) {
- if (NULL != prefix->strs[i]) {
- free(prefix->strs[i]);
- prefix->strs[i] = NULL;
- }
- }
- free(prefix->strs);
- prefix->strs = NULL;
- prefix->count = 0;
- }
- if (prefix->last_env) {
- free(prefix->last_env);
- prefix->last_env = NULL;
- }
-
- errno = old_errno;
-}
-
-static void init_env_entries(sbprefix_t* prefix, char* env)
-{
- int old_errno = errno;
- char* prefixes_env = getenv(env);
-
- if (NULL == prefixes_env) {
- fprintf(stderr,
- "Sandbox error : the %s environmental variable should be defined.\n",
- env);
- } else {
- char *ptr;
- int num_colons = 0;
-
- /* Check to see if the env value has changed since the
- last time this was initalized, don't do the work again
- if it hasn't.
- */
-
- if (prefix->last_env && !strcmp(prefix->last_env, prefixes_env)) {
- errno = old_errno;
- return;
- }
-
- /* Clean any existing entries */
- clean_env_entries(prefix);
-
- /* Env value is different, update the cached copy */
- prefix->last_env = strdup(prefixes_env);
-
- ptr = prefixes_env;
- while (*ptr) {
- if (*ptr++ == ':') ++num_colons;
- }
-
- if (prefix->strs) {
- free(prefix->strs);
- prefix->strs = 0;
- }
- prefix->strs = (char**)malloc((num_colons+1) * sizeof(char*));
- if (!prefix->strs) return;
- memset(prefix->strs, 0, (num_colons+1) * sizeof(char*));
- prefix->count = 0;
-
- ptr = prefixes_env;
- while (*ptr) {
- char *next_colon = strchr(ptr, ':');
- if (next_colon) {
- if (next_colon != ptr) {
- char *str = strndup(ptr, next_colon-ptr);
- if (!str) return;
- prefix->strs[prefix->count++] = filter_path(str);
- free(str);
- }
- } else {
- prefix->strs[prefix->count++] = filter_path(ptr);
- break;
- }
-
- ptr = next_colon+1;
- }
- }
- errno = old_errno;
-}
-
-static char* filter_path(const char* path)
-{
- int old_errno = errno;
- char* filtered_path = (char *)malloc(MAXPATHLEN * sizeof(char));
- filtered_path[0] = 0;
-
- canonicalize(path, filtered_path);
-
- errno = old_errno;
-
- return filtered_path;
-}
-
-static int check_access(sbcontext_t* sbcontext, const char* func, const char* path)
-{
- int old_errno = errno;
- int result = -1;
- int i = 0;
- char* filtered_path = filter_path(path);
-
- if (!filtered_path) {
- errno = old_errno;
- return 0;
- }
-
- if ('/' != filtered_path[0]) {
- free(filtered_path);
- errno = old_errno;
- return 0;
- }
-
- if ((0 == strncmp(filtered_path, "/etc/ld.so.preload", 18)) && (is_sandbox_pid())) {
- result = 1;
- }
-
- if (-1 == result) {
- if (NULL != sbcontext->deny.strs) {
- for (i = 0; i < sbcontext->deny.count; i++) {
- if (NULL != sbcontext->deny.strs[i]) {
- if (0 == strncmp(filtered_path,
- sbcontext->deny.strs[i],
- strlen(sbcontext->deny.strs[i]))) {
- result = 0;
- break;
- }
- }
- }
- }
-
- if (-1 == result) {
- if ((NULL != sbcontext->read.strs) &&
- ((0 == strncmp(func, "open_rd", 7)) ||
- (0 == strncmp(func, "popen", 5)) ||
- (0 == strncmp(func, "opendir", 7)) ||
- (0 == strncmp(func, "system", 6)) ||
- (0 == strncmp(func, "execl", 5)) ||
- (0 == strncmp(func, "execlp", 6)) ||
- (0 == strncmp(func, "execle", 6)) ||
- (0 == strncmp(func, "execv", 5)) ||
- (0 == strncmp(func, "execvp", 6)) ||
- (0 == strncmp(func, "execve", 6))
- )
- ) {
- for (i = 0; i < sbcontext->read.count; i++) {
- if (NULL != sbcontext->read.strs[i]) {
- if (0 == strncmp(filtered_path,
- sbcontext->read.strs[i],
- strlen(sbcontext->read.strs[i]))) {
- result = 1;
- break;
- }
- }
- }
- }
- else if ((NULL != sbcontext->write.strs) &&
- ((0 == strncmp(func, "open_wr", 7)) ||
- (0 == strncmp(func, "creat", 5)) ||
- (0 == strncmp(func, "creat64", 7)) ||
- (0 == strncmp(func, "mkdir", 5)) ||
- (0 == strncmp(func, "mknod", 5)) ||
- (0 == strncmp(func, "mkfifo", 6)) ||
- (0 == strncmp(func, "link", 4)) ||
- (0 == strncmp(func, "symlink", 7)) ||
- (0 == strncmp(func, "rename", 6)) ||
- (0 == strncmp(func, "utime", 5)) ||
- (0 == strncmp(func, "utimes", 6)) ||
- (0 == strncmp(func, "unlink", 6)) ||
- (0 == strncmp(func, "rmdir", 5)) ||
- (0 == strncmp(func, "chown", 5)) ||
- (0 == strncmp(func, "lchown", 6)) ||
- (0 == strncmp(func, "chmod", 5)) ||
- (0 == strncmp(func, "truncate", 8)) ||
- (0 == strncmp(func, "ftruncate", 9)) ||
- (0 == strncmp(func, "truncate64", 10)) ||
- (0 == strncmp(func, "ftruncate64", 11))
- )
- ) {
- struct stat tmp_stat;
-
-#if 0 // write_denied is never set
-
- for (i = 0; i < sbcontext->write_denied.count; i++) {
- if (NULL != sbcontext->write_denied.strs[i]) {
- if (0 == strncmp(filtered_path,
- sbcontext->write_denied.strs[i],
- strlen(sbcontext->write_denied.strs[i]))) {
- result = 0;
- break;
- }
- }
- }
-#endif
-
- if (-1 == result) {
- for (i = 0; i < sbcontext->write.count; i++) {
- if (NULL != sbcontext->write.strs[i]) {
- if (0 == strncmp(filtered_path,
- sbcontext->write.strs[i],
- strlen(sbcontext->write.strs[i]))) {
- result = 1;
- break;
- }
- }
- }
-
- if (-1 == result) {
- /* hack to prevent mkdir of existing dirs to show errors */
- if (0 == strncmp(func, "mkdir", 5)) {
- if (0 == stat(filtered_path, &tmp_stat)) {
- sbcontext->show_access_violation = 0;
- result = 0;
- }
- }
-
- if (-1 == result) {
- for (i = 0; i < sbcontext->predict.count; i++) {
- if (NULL != sbcontext->predict.strs[i]) {
- if (0 == strncmp(filtered_path,
- sbcontext->predict.strs[i],
- strlen(sbcontext->predict.strs[i]))) {
- sbcontext->show_access_violation = 0;
- result = 0;
- break;
- }
- }
- }
- }
- }
- }
- }
- }
- }
-
- if (-1 == result) {
- result = 0;
- }
-
- if (filtered_path) free(filtered_path);
- filtered_path = NULL;
-
- errno = old_errno;
-
- return result;
-}
-
-static int check_syscall(sbcontext_t* sbcontext, const char* func, const char* file)
-{
- int old_errno = errno;
- int result = 1;
- struct stat log_stat;
- char* log_path = NULL;
- char* absolute_path = NULL;
- char* tmp_buffer = NULL;
- int log_file = 0;
- struct stat debug_log_stat;
- char* debug_log_env = NULL;
- char* debug_log_path = NULL;
- int debug_log_file = 0;
- char buffer[512];
-
- init_wrappers();
-
- if ('/' == file[0]) {
- absolute_path = (char *)malloc((strlen(file) + 1) * sizeof(char));
- sprintf(absolute_path, "%s", file);
- } else {
- tmp_buffer = get_current_dir_name();
- absolute_path = (char *)malloc((strlen(tmp_buffer) + 1 + strlen(file) + 1) * sizeof(char));
- sprintf(absolute_path,"%s/%s", tmp_buffer, file);
-
- if (tmp_buffer) free(tmp_buffer);
- tmp_buffer = NULL;
- }
-
- log_path = getenv("SANDBOX_LOG");
- debug_log_env = getenv("SANDBOX_DEBUG");
- debug_log_path = getenv("SANDBOX_DEBUG_LOG");
-
- if (((NULL == log_path) ||
- (0 != strncmp(absolute_path, log_path, strlen(log_path)))) &&
- ((NULL == debug_log_env) ||
- (NULL == debug_log_path) ||
- (0 != strncmp(absolute_path, debug_log_path, strlen(debug_log_path)))) &&
- (0 == check_access(sbcontext, func, absolute_path))
- ) {
- if (1 == sbcontext->show_access_violation) {
- fprintf(stderr, "\e[31;01mACCESS DENIED\033[0m %s:%*s%s\n",
- func, (int)(10 - strlen(func)), "", absolute_path);
-
- if (NULL != log_path) {
- sprintf(buffer, "%s:%*s%s\n", func, (int)(10 - strlen(func)), "", absolute_path);
-
- if ((0 == lstat(log_path, &log_stat)) &&
- (0 == S_ISREG(log_stat.st_mode))
- ) {
- fprintf(stderr,
- "\e[31;01mSECURITY BREACH\033[0m %s already exists and is not a regular file.\n",
- log_path);
- } else {
- log_file = true_open(log_path,
- O_APPEND | O_WRONLY | O_CREAT,
- S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
- if(log_file >= 0) {
- write(log_file, buffer, strlen(buffer));
- close(log_file);
- }
- }
- }
- }
-
- result = 0;
- }
- else if (NULL != debug_log_env) {
- if (NULL != debug_log_path) {
- if (0 != strncmp(absolute_path, debug_log_path, strlen(debug_log_path))) {
- sprintf(buffer, "%s:%*s%s\n", func, (int)(10 - strlen(func)), "", absolute_path);
-
- if ((0 == lstat(debug_log_path, &debug_log_stat)) &&
- (0 == S_ISREG(debug_log_stat.st_mode))
- ) {
- fprintf(stderr,
- "\e[31;01mSECURITY BREACH\033[0m %s already exists and is not a regular file.\n",
- log_path);
- } else {
- debug_log_file = true_open(debug_log_path,
- O_APPEND | O_WRONLY | O_CREAT,
- S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
- if(debug_log_file >= 0) {
- write(debug_log_file, buffer, strlen(buffer));
- close(debug_log_file);
- }
- }
- }
- } else {
- fprintf(stderr, "\e[32;01mACCESS ALLOWED\033[0m %s:%*s%s\n",
- func, (int)(10 - strlen(func)), "", absolute_path);
- }
- }
-
- if (absolute_path) free(absolute_path);
- absolute_path = NULL;
-
- errno = old_errno;
-
- return result;
-}
-
-static int is_sandbox_on()
-{
- int old_errno = errno;
-
- /* $SANDBOX_ACTIVE is an env variable that should ONLY
- * be used internal by sandbox.c and libsanbox.c. External
- * sources should NEVER set it, else the sandbox is enabled
- * in some cases when run in parallel with another sandbox,
- * but not even in the sandbox shell.
- *
- * Azarah (3 Aug 2002)
- */
- if ((NULL != getenv("SANDBOX_ON")) &&
- (0 == strncmp(getenv("SANDBOX_ON"), "1", 1)) &&
- (NULL != getenv("SANDBOX_ACTIVE")) &&
- (0 == strncmp(getenv("SANDBOX_ACTIVE"), "armedandready", 13))
- ) {
- errno = old_errno;
-
- return 1;
- } else {
- errno = old_errno;
-
- return 0;
- }
-}
-
-static int before_syscall(const char* func, const char* file)
-{
- int old_errno = errno;
- int result = 1;
-
- /* Only allow one thread to access sbcontext at a time */
- sem_wait(&ctxsem);
-
- if (!sbcontext) {
- sbcontext = (sbcontext_t*)malloc(sizeof(sbcontext_t));
- init_context(sbcontext);
- } else {
- /* sometimes this value gets set to 0 */
- sbcontext->show_access_violation = 1;
- }
-
- init_env_entries(&sbcontext->deny, "SANDBOX_DENY");
- init_env_entries(&sbcontext->read, "SANDBOX_READ");
- init_env_entries(&sbcontext->write, "SANDBOX_WRITE");
- init_env_entries(&sbcontext->predict, "SANDBOX_PREDICT");
-
- result = check_syscall(sbcontext, func, file);
-
- if (sem_post(&ctxsem)) {
- fprintf(stderr, "Failed trying to release semaphore\n");
- }
-
- errno = old_errno;
-
- if (0 == result) {
- errno = EACCES;
- }
-
- return result;
-}
-
-static int before_syscall_open_int(const char* func, const char* file, int flags)
-{
- if ((flags & O_WRONLY) || (flags & O_RDWR)) {
- return before_syscall("open_wr", file);
- } else {
- return before_syscall("open_rd", file);
- }
-}
-
-static int before_syscall_open_char(const char* func, const char* file, const char* mode)
-{
- if ((strcmp(mode, "r") == 0) || (strcmp(mode, "rb") == 0)) {
- return before_syscall("open_rd", file);
- } else {
- return before_syscall("open_wr", file);
- }
-}
-
-
-// vim:expandtab noai:cindent ai
+++ /dev/null
-# Copyright (C) 2001 Geert Bevin, Uwyn, http://www.uwyn.com
-# Distributed under the terms of the GNU General Public License, v2 or later
-# Author : Geert Bevin <gbevin@uwyn.com>
-# $Id: /var/cvsroot/gentoo-src/portage/src/sandbox-dev/Attic/sandbox.bashrc,v 1.1 2002/08/25 06:09:05 azarah Exp $
-source /etc/profile
-export LD_PRELOAD="$SANDBOX_LIB"
-alias make="make LD_PRELOAD=$SANDBOX_LIB"
-alias su="su -c '/bin/bash -rcfile $SANDBOX_DIR/sandbox.bashrc'"
+++ /dev/null
-/*
-** Path sandbox for the gentoo linux portage package system, initially
-** based on the ROCK Linux Wrapper for getting a list of created files
-**
-** to integrate with bash, bash should have been built like this
-**
-** ./configure --prefix=<prefix> --host=<host> --without-gnu-malloc
-**
-** it's very important that the --enable-static-link option is NOT specified
-**
-** Copyright (C) 2001 Geert Bevin, Uwyn, http://www.uwyn.com
-** Distributed under the terms of the GNU General Public License, v2 or later
-** Author : Geert Bevin <gbevin@uwyn.com>
-** $Id: /var/cvsroot/gentoo-src/portage/src/sandbox-dev/Attic/sandbox.c,v 1.4 2002/10/20 21:37:30 azarah Exp $
-*/
-
-#define _GNU_SOURCE
-
-#include <errno.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <limits.h>
-#include <string.h>
-#include <sys/file.h>
-#include <sys/stat.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <sys/resource.h>
-#include <sys/wait.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include "sandbox.h"
-
-int preload_adaptable = 1;
-int cleaned_up = 0;
-int print_debug = 0;
-
-/* Read pids file, and load active pids into an array. Return number of pids in array */
-int load_active_pids(int fd, int **pids)
-{
- char *data = NULL;
- char *ptr = NULL, *ptr2 = NULL;
- int my_pid;
- int num_pids = 0;
- long len;
-
- pids[0] = NULL;
-
- len = file_length(fd);
-
- /* Allocate and zero datablock to read pids file */
- data = (char *)malloc((len + 1)*sizeof(char));
- memset(data, 0, len + 1);
-
- /* Start at beginning of file */
- lseek(fd, 0L, SEEK_SET);
-
- /* read entire file into a buffer */
- read(fd, data, len);
-
- ptr = data;
-
- /* Loop and read all pids */
- while (1) {
- /* Find new line */
- ptr2 = strchr(ptr, '\n');
- if (ptr2 == NULL) break; /* No more PIDs */
-
- /* clear the \n. And ptr should have a null-terminated decimal string */
- ptr2[0] = 0;
-
- my_pid = atoi(ptr);
-
- /* If the PID is still alive, add it to our array */
- if ((0 != my_pid) && (0 == kill(my_pid, 0))) {
- pids[0] = (int *)realloc(pids[0], (num_pids + 1)*sizeof(int));
- pids[0][num_pids] = my_pid;
- num_pids++;
- }
-
- /* Put ptr past the NULL we just wrote */
- ptr = ptr2 + 1;
- }
-
- if (data) free(data);
-
- return num_pids;
-}
-
-/* Read ld.so.preload file, and loads dirs into an array. Return number of entries in array */
-int load_preload_libs(int fd, char ***preloads)
-{
- char *data = NULL;
- char *ptr = NULL, *ptr2 = NULL;
- int num_entries = 0;
- long len;
-
- preloads[0] = NULL;
-
- len = file_length(fd);
-
- /* Allocate and zero datablock to read pids file */
- data = (char *)malloc((len + 1)*sizeof(char));
- memset(data, 0, len + 1);
-
- /* Start at beginning of file */
- lseek(fd, 0L, SEEK_SET);
-
- /* read entire file into a buffer */
- read(fd, data, len);
-
- ptr = data;
-
- /* Loop and read all pids */
- while (1) {
- /* Find new line */
- ptr2 = strchr(ptr, '\n');
-
- /* clear the \n. And ptr should have a null-terminated decimal string
- * Don't break from the loop though because the last line may not
- * terminated with a \n
- */
- if (NULL != ptr2) ptr2[0] = 0;
-
- /* If listing does not match our libname, add it to the array */
- if ((strlen(ptr)) && (NULL == strstr(ptr, LIB_NAME))) {
- preloads[0] = (char **)realloc(preloads[0], (num_entries + 1)*sizeof(char **));
- preloads[0][num_entries] = strdup(ptr);
- num_entries++;
- }
-
- if (NULL == ptr2) break; /* No more PIDs */
-
- /* Put ptr past the NULL we just wrote */
- ptr = ptr2 + 1;
- }
-
- if (data) free(data);
-
- return num_entries;
-}
-
-
-void cleanup()
-{
- int i = 0;
- int success = 1;
- int pids_file = -1, num_of_pids = 0;
- int *pids_array = NULL;
- char pid_string[255];
-#ifdef USE_LD_SO_PRELOAD
- int preload_file = -1, num_of_preloads = 0;
- char preload_entry[255];
- char **preload_array = NULL;
-#endif
-
-
- /* remove this sandbox's bash pid from the global pids
- * file if it has rights to adapt the ld.so.preload file */
- if ((1 == preload_adaptable) && (0 == cleaned_up)) {
- cleaned_up = 1;
- success = 1;
-
- if (print_debug) printf("Cleaning up pids file.\n");
-
- /* Stat the PIDs file, make sure it exists and is a regular file */
- if (file_exist(PIDS_FILE, 1) <= 0) {
- perror(">>> pids file is not a regular file");
- success = 0;
- /* We should really not fail if the pidsfile is missing here, but
- * rather just exit cleanly, as there is still some cleanup to do */
- return;
- }
-
- pids_file = file_open(PIDS_FILE, "r+", 0);
- if (-1 == pids_file) {
- success = 0;
- /* Nothing more to do here */
- return;
- }
-
- /* Load "still active" pids into an array */
- num_of_pids = load_active_pids(pids_file, &pids_array);
- //printf("pids: %d\r\n", num_of_pids);
-
-#ifdef USE_LD_SO_PRELOAD
- /* clean the /etc/ld.so.preload file if no other sandbox
- * processes are running anymore */
- if (1 == num_of_pids) {
- success = 1;
-
- if (print_debug) printf("Cleaning up /etc/ld.so.preload.\n");
-
- preload_file = file_open("/etc/ld.so.preload", "r+", 0);
- if (-1 != preload_file) {
- /* Load all the preload libraries into an array */
- num_of_preloads = load_preload_libs(preload_file, &preload_array);
- //printf("num preloads: %d\r\n", num_of_preloads);
- /* Clear file */
- file_truncate(preload_file);
-
- /* store the other preload libraries back into the /etc/ld.so.preload file */
- if(num_of_preloads > 0) {
- for (i = 0; i < num_of_preloads; i++) {
- sprintf(preload_entry, "%s\n", preload_array[i]);
- if (write(preload_file, preload_entry, strlen(preload_entry)) != strlen(preload_entry)) {
- perror(">>> /etc/ld.so.preload file write");
- success = 0;
- break;
- }
- }
- }
-
- /* Free memory used to store preload array */
- for (i = 0; i < num_of_preloads; i++) {
- if (preload_array[i]) free(preload_array[i]);
- preload_array[i] = NULL;
- }
- if (preload_array) free(preload_array);
- preload_array = NULL;
-
- file_close(preload_file);
- preload_file = -1;
- }
- }
-#endif
-
- file_truncate(pids_file);
-
- /* if pids are still running, write only the running pids back to the file */
- if(num_of_pids > 1) {
- for (i = 0; i < num_of_pids; i++) {
- sprintf(pid_string, "%d\n", pids_array[i]);
- if (write(pids_file, pid_string, strlen(pid_string)) != strlen(pid_string)) {
- perror(">>> pids file write");
- success = 0;
- break;
- }
- }
-
- file_close(pids_file);
- pids_file = -1;
- } else {
-
- file_close(pids_file);
- pids_file = -1;
-
- /* remove the pidsfile, as this was the last sandbox */
- unlink(PIDS_FILE);
- }
-
- if (pids_array != NULL) {
- free(pids_array);
- pids_array = NULL;
- }
- }
-
- if (0 == success) {
- return;
- }
-}
-
-void stop(int signum)
-{
- printf("Caught signal %d\r\n", signum);
- cleanup();
-}
-
-void setenv_sandbox_write(char *home_dir, char *portage_tmp_dir, char *var_tmp_dir, char *tmp_dir)
-{
- char sandbox_write_var[1024];
-
- if (!getenv(ENV_SANDBOX_WRITE)) {
- /* these should go into make.globals later on */
- strcpy(sandbox_write_var, "");
- strcat(sandbox_write_var, "/dev/zero:/dev/fd/:/dev/null:/dev/pts/:/dev/vc/:/dev/tty:/tmp/");
- strcat(sandbox_write_var, ":");
- /* NGPT support */
- strcat(sandbox_write_var, "/dev/shm/ngpt");
- strcat(sandbox_write_var, ":");
- strcat(sandbox_write_var, "/var/log/scrollkeeper.log");
- strcat(sandbox_write_var, ":");
- strcat(sandbox_write_var, home_dir);
- strcat(sandbox_write_var, "/.gconfd/lock");
- strcat(sandbox_write_var, ":");
- strcat(sandbox_write_var, home_dir);
- strcat(sandbox_write_var, "/.bash_history");
- strcat(sandbox_write_var, ":");
- strcat(sandbox_write_var, "/usr/tmp/conftest");
- strcat(sandbox_write_var, ":");
- strcat(sandbox_write_var, "/usr/lib/conftest");
- strcat(sandbox_write_var, ":");
- strcat(sandbox_write_var, "/usr/tmp/cf");
- strcat(sandbox_write_var, ":");
- strcat(sandbox_write_var, "/usr/lib/cf");
- strcat(sandbox_write_var, ":");
- if (NULL == portage_tmp_dir) {
- strcat(sandbox_write_var, tmp_dir);
- strcat(sandbox_write_var, ":");
- strcat(sandbox_write_var, var_tmp_dir);
- strcat(sandbox_write_var, ":");
- strcat(sandbox_write_var, "/tmp/");
- strcat(sandbox_write_var, ":");
- strcat(sandbox_write_var, "/var/tmp/");
-
- /* How the heck is this possible?? we just set it above! */
- } else if (0 == strcmp(sandbox_write_var, "/var/tmp/")) {
- strcat(sandbox_write_var, portage_tmp_dir);
- strcat(sandbox_write_var, ":");
- strcat(sandbox_write_var, tmp_dir);
- strcat(sandbox_write_var, ":");
- strcat(sandbox_write_var, "/tmp/");
-
- /* Still don't think this is possible, am I just stupid or something? */
- } else if (0 == strcmp(sandbox_write_var, "/tmp/")) {
- strcat(sandbox_write_var, portage_tmp_dir);
- strcat(sandbox_write_var, ":");
- strcat(sandbox_write_var, var_tmp_dir);
- strcat(sandbox_write_var, ":");
- strcat(sandbox_write_var, "/var/tmp/");
-
- /* Amazing, one I think is possible */
- } else {
- strcat(sandbox_write_var, portage_tmp_dir);
- strcat(sandbox_write_var, ":");
- strcat(sandbox_write_var, tmp_dir);
- strcat(sandbox_write_var, ":");
- strcat(sandbox_write_var, var_tmp_dir);
- strcat(sandbox_write_var, ":");
- strcat(sandbox_write_var, "/tmp/");
- strcat(sandbox_write_var, ":");
- strcat(sandbox_write_var, "/var/tmp/");
- }
-
- setenv(ENV_SANDBOX_WRITE, sandbox_write_var, 1);
- }
-}
-
-
-void setenv_sandbox_predict(char *home_dir)
-{
- char sandbox_predict_var[1024];
-
- if (!getenv(ENV_SANDBOX_PREDICT)) {
- /* these should go into make.globals later on */
- strcpy(sandbox_predict_var, "");
- strcat(sandbox_predict_var, home_dir);
- strcat(sandbox_predict_var, "/.");
- strcat(sandbox_predict_var, ":");
- strcat(sandbox_predict_var, "/usr/lib/python2.0/");
- strcat(sandbox_predict_var, ":");
- strcat(sandbox_predict_var, "/usr/lib/python2.1/");
- strcat(sandbox_predict_var, ":");
- strcat(sandbox_predict_var, "/usr/lib/python2.2/");
- setenv(ENV_SANDBOX_PREDICT, sandbox_predict_var, 1);
- }
-}
-
-int print_sandbox_log(char *sandbox_log)
-{
- int sandbox_log_file = -1;
- char *beep_count_env = NULL;
- int i, beep_count = 0;
- long len = 0;
- char *buffer = NULL;
-
- sandbox_log_file=file_open(sandbox_log, "r", 0);
- if (-1 == sandbox_log_file) {
- return 0;
- }
-
- len = file_length(sandbox_log_file);
- buffer = (char *)malloc((len + 1)*sizeof(char));
- memset(buffer, 0, len + 1);
- read(sandbox_log_file, buffer, len);
- file_close(sandbox_log_file);
-
- printf("\e[31;01m--------------------------- ACCESS VIOLATION SUMMARY ---------------------------\033[0m\n");
- printf("\e[31;01mLOG FILE = \"%s\"\033[0m\n", sandbox_log);
- printf("\n");
- printf("%s", buffer);
- if (buffer) free(buffer); buffer = NULL;
- printf("\e[31;01m--------------------------------------------------------------------------------\033[0m\n");
-
- beep_count_env = getenv(ENV_SANDBOX_BEEP);
- if (beep_count_env) {
- beep_count = atoi(beep_count_env);
- } else {
- beep_count = DEFAULT_BEEP_COUNT;
- }
-
- for (i = 0; i < beep_count; i++) {
- fputc('\a', stderr);
- if (i < beep_count -1) {
- sleep(1);
- }
- }
- return 1;
-}
-
-int spawn_shell(char *argv_bash[])
-{
-#ifdef USE_SYSTEM_SHELL
- int i = 0;
- char *sh = NULL;
- int first = 1;
- int ret;
- long len = 0;
-
- while (1) {
- if (NULL == argv_bash[i]) break;
- if (NULL != sh) len = strlen(sh);
- sh = (char *)realloc(sh, len+strlen(argv_bash[i]) + 5);
- if (first) {
- sh[0] = 0;
- first = 0;
- }
- strcat(sh, "\"");
- strcat(sh, argv_bash[i]);
- strcat(sh, "\" ");
-
- //printf("%s\n", argv_bash[i]);
- i++;
- }
- printf("%s\n", sh);
- ret = system(sh);
- if (sh) free(sh);
- sh = NULL;
-
- if (-1 == ret) return 0;
- return 1;
-
-#else
-# ifndef NO_FORK
- int pid;
- int status = 0;
- int ret = 0;
-
- pid = fork();
-
- /* Child's process */
- if (0 == pid) {
-# endif
- execv(argv_bash[0], argv_bash);
-# ifndef NO_FORK
- return 0;
- } else if (pid < 0) {
- return 0;
- }
- ret = waitpid(pid, &status, 0);
- if ((-1 == ret) || (status > 0)) return 0;
-# endif
- return 1;
-#endif
-}
-
-int main(int argc, char** argv)
-{
- int i = 0, success = 1;
- int preload_file = -1;
- int sandbox_log_presence = 0;
- int sandbox_log_file = -1;
- int pids_file = -1;
- long len;
-
- int *pids_array = NULL;
- int num_of_pids = 0;
-
- // char run_arg[255];
- char portage_tmp_dir[PATH_MAX];
- char var_tmp_dir[PATH_MAX];
- char tmp_dir[PATH_MAX];
- char sandbox_log[255];
- char sandbox_debug_log[255];
- char sandbox_dir[255];
- char sandbox_lib[255];
- char sandbox_rc[255];
- char pid_string[255];
- char **argv_bash = NULL;
-
- char *run_str = "-c";
- char *home_dir = NULL;
- char *tmp_string = NULL;
-#ifdef USE_LD_SO_PRELOAD
- char **preload_array = NULL;
- int num_of_preloads = 0;
-#endif
-
- /* Only print info if called with no arguments .... */
- if (argc < 2) {
- print_debug = 1;
- }
-
- if (print_debug) printf("========================== Gentoo linux path sandbox ===========================\n");
-
-
- /* check if a sandbox is already running */
- if (NULL != getenv(ENV_SANDBOX_ON)) {
- fprintf(stderr, "Not launching a new sandbox instance\nAnother one is already running in this process hierarchy.\n");
- exit(1);
- } else {
-
- /* determine the location of all the sandbox support files */
- if (print_debug) printf("Detection of the support files.\n");
-
- /* Generate base sandbox path */
- tmp_string = get_sandbox_path(argv[0]);
- strncpy(sandbox_dir, tmp_string, 254);
- if (tmp_string) free(tmp_string);
- tmp_string = NULL;
- strcat(sandbox_dir, "/");
-
- /* Generate sandbox lib path */
- tmp_string = get_sandbox_lib(sandbox_dir);
- strncpy(sandbox_lib, tmp_string, 254);
- if (tmp_string) free(tmp_string);
- tmp_string = NULL;
-
- /* Generate sandbox bashrc path */
- tmp_string = get_sandbox_rc(sandbox_dir);
- strncpy(sandbox_rc, tmp_string, 254);
- if (tmp_string) free(tmp_string);
- tmp_string = NULL;
-
- /* verify the existance of required files */
- if (print_debug) printf("Verification of the required files.\n");
-
- if (file_exist(sandbox_lib, 0) <= 0) {
- fprintf(stderr, "Could not open the sandbox library at '%s'.\n", sandbox_lib);
- return -1;
- } else if (file_exist(sandbox_rc, 0) <= 0) {
- fprintf(stderr, "Could not open the sandbox rc file at '%s'.\n", sandbox_rc);
- return -1;
- }
-
-#ifdef USE_LD_SO_PRELOAD
- /* ensure that the /etc/ld.so.preload file contains an entry for the sandbox lib */
- if (print_debug) printf("Setting up the ld.so.preload file.\n");
-#endif
-
- /* check if the /etc/ld.so.preload is a regular file */
- if (file_exist("/etc/ld.so.preload", 1) < 0) {
- fprintf(stderr, ">>> /etc/ld.so.preload file is not a regular file\n");
- exit(1);
- }
-
- /* Our r+ also will create the file if it doesn't exist */
- preload_file=file_open("/etc/ld.so.preload", "r+", 1, 0644);
- if (-1 == preload_file) {
- preload_adaptable = 0;
-/* exit(1);*/
- }
-
-#ifdef USE_LD_SO_PRELOAD
- /* Load entries of preload table */
- num_of_preloads = load_preload_libs(preload_file, &preload_array);
-
- /* Zero out our ld.so.preload file */
- file_truncate(preload_file);
-
- /* Write contents of preload file */
- for (i = 0; i < num_of_preloads + 1; i++) {
- /* First entry should be our sandbox library */
- if (0 == i) {
- if (write(preload_file, sandbox_lib, strlen(sandbox_lib)) != strlen(sandbox_lib)) {
- perror(">>> /etc/ld.so.preload file write");
- success = 0;
- break;
- }
- } else {
- /* Output all other preload entries */
- if (write(preload_file, preload_array[i - 1], strlen(preload_array[i - 1])) != strlen(preload_array[i - 1])) {
- perror(">>> /etc/ld.so.preload file write");
- success = 0;
- break;
- }
- }
- /* Don't forget the return character after each line! */
- if (1 != write(preload_file, "\n", 1)) {
- perror(">>> /etc/ld.so.preload file write");
- success = 0;
- break;
- }
- }
-
- for (i = 0; i < num_of_preloads; i++) {
- if (preload_array[i]) free(preload_array[i]);
- preload_array[i] = NULL;
- }
- if (preload_array) free(preload_array);
- num_of_preloads = 0;
- preload_array = NULL;
-#endif
-
- /* That's all we needed to do with the preload file */
- file_close(preload_file);
- preload_file = -1;
-
- /* set up the required environment variables */
- if (print_debug) printf("Setting up the required environment variables.\n");
-
- /* Generate sandbox log full path */
- tmp_string=get_sandbox_log();
- strncpy(sandbox_log, tmp_string, 254);
- if (tmp_string) free(tmp_string);
- tmp_string = NULL;
-
- setenv(ENV_SANDBOX_LOG, sandbox_log, 1);
-
- snprintf(sandbox_debug_log, 254, "%s%s%s", DEBUG_LOG_FILE_PREFIX, pid_string, LOG_FILE_EXT);
- setenv(ENV_SANDBOX_DEBUG_LOG, sandbox_debug_log, 1);
-
- home_dir = getenv("HOME");
-
- /* drobbins: we need to expand these paths using realpath() so that PORTAGE_TMPDIR
- * can contain symlinks (example, /var is a symlink, /var/tmp is a symlink.) Without
- * this, access is denied to /var/tmp, hurtin' ebuilds.
- */
-
- realpath(getenv("PORTAGE_TMPDIR"),portage_tmp_dir);
- realpath("/var/tmp",var_tmp_dir);
- realpath("/tmp",tmp_dir);
-
- setenv(ENV_SANDBOX_DIR, sandbox_dir, 1);
- setenv(ENV_SANDBOX_LIB, sandbox_lib, 1);
- setenv("LD_PRELOAD", sandbox_lib, 1);
-
- if (!getenv(ENV_SANDBOX_DENY)) {
- setenv(ENV_SANDBOX_DENY, LD_PRELOAD_FILE, 1);
- }
-
- if (!getenv(ENV_SANDBOX_READ)) {
- setenv(ENV_SANDBOX_READ, "/", 1);
- }
-
- /* Set up Sandbox Write path */
- setenv_sandbox_write(home_dir, portage_tmp_dir, var_tmp_dir, tmp_dir);
- setenv_sandbox_predict(home_dir);
-
- setenv(ENV_SANDBOX_ON, "1", 0);
-
- /* if the portage temp dir was present, cd into it */
- if (NULL != portage_tmp_dir) {
- chdir(portage_tmp_dir);
- }
-
- argv_bash=(char **)malloc(6 * sizeof(char *));
- argv_bash[0] = strdup("/bin/bash");
- argv_bash[1] = strdup("-rcfile");
- argv_bash[2] = strdup(sandbox_rc);
- if (argc < 2) {
- argv_bash[3] = NULL;
- } else {
- argv_bash[3] = strdup(run_str); /* "-c" */
- }
- argv_bash[4] = NULL; /* strdup(run_arg); */
- argv_bash[5] = NULL;
-
- if (argc >= 2) {
- for (i = 1; i< argc; i++) {
- if (NULL == argv_bash[4]) len = 0;
- else len = strlen(argv_bash[4]);
- argv_bash[4]=(char *)realloc(argv_bash[4], (len + strlen(argv[i]) + 2) * sizeof(char));
- if (0 == len) argv_bash[4][0] = 0;
- if (1 != i) strcat(argv_bash[4], " ");
- strcat(argv_bash[4], argv[i]);
- }
- }
-#if 0
- char* argv_bash[] = {
- "/bin/bash",
- "-rcfile",
- NULL,
- NULL,
- NULL,
- NULL
- };
-
- /* adding additional bash arguments */
- for (i = 1; i < argc; i++) {
- if (1 == i) {
- argv_bash[3] = run_str;
- argv_bash[4] = run_arg;
- strcpy(argv_bash[4], argv[i]);
- } else {
- strcat(argv_bash[4], " ");
- strcat(argv_bash[4], argv[i]);
- }
- }
-#endif
-
- /* set up the required signal handlers */
- signal(SIGHUP, &stop);
- signal(SIGINT, &stop);
- signal(SIGQUIT, &stop);
- signal(SIGTERM, &stop);
-
- /* this one should NEVER be set in ebuilds, as it is the one
- * private thing libsandbox.so use to test if the sandbox
- * should be active for this pid, or not.
- *
- * azarah (3 Aug 2002)
- */
-
- setenv("SANDBOX_ACTIVE", "armedandready", 1);
-
-
- /* Load our PID into PIDs file if environment is adaptable */
- if (preload_adaptable) {
- success = 1;
- if (file_exist(PIDS_FILE, 1) < 0) {
- success = 0;
- fprintf(stderr, ">>> pids file is not a regular file");
- } else {
- pids_file=file_open(PIDS_FILE, "r+", 1, 0644);
- if (-1 == pids_file) {
- success = 0;
- } else {
- /* Grab still active pids */
- num_of_pids = load_active_pids(pids_file, &pids_array);
-
- /* Zero out file */
- file_truncate(pids_file);
-
- /* Output active pids, and append our pid */
- for (i = 0; i < num_of_pids + 1; i++) {
- /* Time for our entry */
- if (i == num_of_pids) {
- sprintf(pid_string, "%d\n", getpid());
- } else {
- sprintf(pid_string, "%d\n", pids_array[i]);
- }
- if (write(pids_file, pid_string, strlen(pid_string)) != strlen(pid_string)) {
- perror(">>> /etc/ld.so.preload file write");
- success = 0;
- break;
- }
- }
- /* Clean pids_array */
- if (pids_array) free(pids_array);
- pids_array = NULL;
- num_of_pids = 0;
-
- /* We're done with the pids file */
- file_close(pids_file);
- }
- }
-
- /* Something went wrong, bail out */
- if (success == 0)
- exit(1);
- }
-
- /* STARTING PROTECTED ENVIRONMENT */
- if (print_debug) {
- printf("The protected environment has been started.\n");
- printf("--------------------------------------------------------------------------------\n");
- }
-
- if (print_debug) printf("Shell being started in forked process.\n");
-
- /* Start Bash */
- if (!spawn_shell(argv_bash)) {
- if (print_debug) fprintf(stderr, ">>> shell process failed to spawn\n");
- success = 0;
- }
-
- /* Free bash stuff */
- for (i = 0; i < 6; i++) {
- if (argv_bash[i]) free(argv_bash[i]);
- argv_bash[i] = NULL;
- }
- if (argv_bash) free(argv_bash);
- argv_bash = NULL;
-
- if (print_debug) {
- printf("Cleaning up sandbox process\n");
- }
-
- cleanup();
-
- if (print_debug) {
- printf("========================== Gentoo linux path sandbox ===========================\n");
- printf("The protected environment has been shut down.\n");
- }
-
- if (file_exist(sandbox_log, 0)) {
- sandbox_log_presence = 1;
- success = 1;
- if (!print_sandbox_log(sandbox_log)) {
- success = 0;
- }
-
-#if 0
- if (!success) {
- exit(1);
- }
-#endif
- sandbox_log_file = -1;
- } else if (print_debug) {
- printf("--------------------------------------------------------------------------------\n");
- }
-
- if ((sandbox_log_presence) || (!success)) {
- return 1;
- } else {
- return 0;
- }
- }
-}
-
-
-
-// vim:expandtab noai:cindent ai
+++ /dev/null
-/*
- * Copyright (C) 2002 Brad House <brad@mainstreetsoftworks.com>,
- * Possibly based on code from Geert Bevin, Uwyn, http://www.uwyn.com
- * Distributed under the terms of the GNU General Public License, v2 or later
- * Author: Brad House <brad@mainstreetsoftworks.com>
- *
- * $Id: /var/cvsroot/gentoo-src/portage/src/sandbox-dev/Attic/sandbox.h,v 1.2 2002/12/04 18:11:32 azarah Exp $
- */
-
-#ifndef __SANDBOX_H__
-#define __SANDBOX_H__
-
-/* Uncomment below to use flock instead of fcntl (POSIX way) to lock/unlock files */
-/* #define USE_FLOCK */
-
-/* Uncomment below to use system() to execute the shell rather than execv */
-/* #define USE_SYSTEM_SHELL */
-
-/* Uncomment below to use /etc/ld.so.preload (could be very intrusive!!) */
-/* #define USE_LD_SO_PRELOAD */
-
-/* Uncommend to not have the protected shell forked, just run in parent process */
-/* ONLY FOR DEBUGGING PURPOSES!! (strace needs it like that) */
-/* #define NO_FORK */
-
-
-#define LD_PRELOAD_FILE "/etc/ld.so.preload"
-#define LIB_NAME "libsandbox.so"
-#define BASHRC_NAME "sandbox.bashrc"
-#define PIDS_FILE "/tmp/sandboxpids.tmp"
-#define LOG_FILE_PREFIX "/tmp/sandbox-"
-#define DEBUG_LOG_FILE_PREFIX "/tmp/sandbox-debug-"
-#define LOG_FILE_EXT ".log"
-
-#define ENV_SANDBOX_DEBUG_LOG "SANDBOX_DEBUG_LOG"
-#define ENV_SANDBOX_LOG "SANDBOX_LOG"
-#define ENV_SANDBOX_DIR "SANDBOX_DIR"
-#define ENV_SANDBOX_LIB "SANDBOX_LIB"
-
-#define ENV_SANDBOX_DENY "SANDBOX_DENY"
-#define ENV_SANDBOX_READ "SANDBOX_READ"
-#define ENV_SANDBOX_WRITE "SANDBOX_WRITE"
-#define ENV_SANDBOX_PREDICT "SANDBOX_PREDICT"
-
-#define ENV_SANDBOX_ON "SANDBOX_ON"
-#define ENV_SANDBOX_BEEP "SANDBOX_BEEP"
-
-#define DEFAULT_BEEP_COUNT 3
-
-char *get_sandbox_path(char *argv0);
-char *get_sandbox_lib(char *sb_path);
-char *get_sandbox_rc(char *sb_path);
-char *get_sandbox_log();
-char *sb_dirname(const char *path);
-int file_getmode(char *mode);
-long file_tell(int fp);
-int file_lock(int fd, int lock, char *filename);
-int file_unlock(int fd);
-int file_locktype(char *mode);
-int file_open(char *filename, char *mode, int perm_specified, ...);
-void file_close(int fd);
-long file_length(int fd);
-int file_truncate(int fd);
-int file_exist(char *filename, int checkmode);
-
-#endif
-
-
-// vim:expandtab noai:cindent ai
+++ /dev/null
-/*
- * Copyright (C) 2002 Brad House <brad@mainstreetsoftworks.com>
- * Distributed under the terms of the GNU General Public License, v2 or later
- * Author: Brad House <brad@mainstreetsoftworks.com>
- *
- * $Id: /var/cvsroot/gentoo-src/portage/src/sandbox-dev/Attic/sandbox_futils.c,v 1.3 2002/12/04 18:11:32 azarah Exp $
- *
- */
-
-#include <errno.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <limits.h>
-#include <string.h>
-#include <stdarg.h>
-#include <sys/file.h>
-#include <sys/stat.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <sys/resource.h>
-#include <sys/wait.h>
-#include <unistd.h>
-#include <fcntl.h>
-
-#include "sandbox.h"
-
-
-char *get_sandbox_path(char *argv0)
-{
- char path[255];
- char *cwd = NULL;
-
- /* ARGV[0] specifies full path */
- if (argv0[0] == '/') {
- strncpy(path, argv0, 254);
-
- /* ARGV[0] specifies relative path */
- } else {
- getcwd(cwd, 253);
- sprintf(path, "%s/%s", cwd, argv0);
- if (cwd) free(cwd);
- cwd = NULL;
- }
-
- /* Return just directory */
- return(sb_dirname(path));
-}
-
-char *get_sandbox_lib(char *sb_path)
-{
- char path[255];
-
- snprintf(path, 254, "/lib/%s", LIB_NAME);
- if (file_exist(path, 0) <= 0) {
- snprintf(path, 254, "%s%s", sb_path, LIB_NAME);
- }
- return(strdup(path));
-}
-
-char *get_sandbox_rc(char *sb_path)
-{
- char path[255];
-
- snprintf(path, 254, "/usr/lib/portage/lib/%s", BASHRC_NAME);
- if (file_exist(path, 0) <= 0) {
- snprintf(path, 254, "%s%s", sb_path, BASHRC_NAME);
- }
- return(strdup(path));
-}
-
-char *get_sandbox_log()
-{
- char path[255];
- char pid_string[20];
- char *sandbox_log_env = NULL;
-
- sprintf(pid_string, "%d", getpid());
-
- strcpy(path, LOG_FILE_PREFIX);
- sandbox_log_env = getenv(ENV_SANDBOX_LOG);
- if (sandbox_log_env) {
- strcat(path, sandbox_log_env);
- strcat(path, "-");
- }
- strcat(path, pid_string);
- strcat(path, LOG_FILE_EXT);
- return(strdup(path));
-}
-
-/* Obtain base directory name. Do not allow trailing / */
-char *sb_dirname(const char *path)
-{
- char *ret = NULL;
- char *ptr = NULL;
- int loc = 0, i;
- int cut_len = -1;
-
- /* don't think NULL will ever be passed, but just in case */
- if (NULL == path) return(strdup("."));
-
- /* Grab pointer to last slash */
- ptr = strrchr(path, '/');
- if (NULL == ptr) {
- return(strdup("."));
- }
-
- /* decimal location of pointer */
- loc = ptr - path;
-
- /* Remove any trailing slash */
- for (i = loc-1; i >= 0; i--) {
- if (path[i] != '/') {
- cut_len = i + 1; /* make cut_len the length of the string to keep */
- break;
- }
- }
-
- /* It could have been just a plain /, return a 1byte 0 filled string */
- if (-1 == cut_len) return(strdup(""));
-
- /* Allocate memory, and return the directory */
- ret = (char *)malloc((cut_len + 1) * sizeof(char));
- memcpy(ret, path, cut_len);
- ret[cut_len] = 0;
-
- return(ret);
-}
-
-/*
-char* dirname(const char* path)
-{
- char* base = NULL;
- unsigned int length = 0;
-
- base = strrchr(path, '/');
- if (NULL == base)
- {
- return strdup(".");
- }
- while (base > path && *base == '/')
- {
- base--;
- }
- length = (unsigned int) 1 + base - path;
-
- base = malloc(sizeof(char)*(length+1));
- memmove(base, path, length);
- base[length] = 0;
-
- return base;
-}*/
-
-/* Convert text (string) modes to integer values */
-int file_getmode(char *mode)
-{
- int mde = 0;
- if (0 == strcasecmp(mode, "r+")) {
- mde = O_RDWR | O_CREAT;
- } else if (0 == strcasecmp(mode, "w+")) {
- mde = O_RDWR | O_CREAT | O_TRUNC;
- } else if (0 == strcasecmp(mode, "a+")) {
- mde = O_RDWR | O_CREAT | O_APPEND;
- } else if (0 == strcasecmp(mode, "r")) {
- mde = O_RDONLY;
- } else if (0 == strcasecmp(mode, "w")) {
- mde = O_WRONLY | O_CREAT | O_TRUNC;
- } else if (0 == strcasecmp(mode, "a")) {
- mde = O_WRONLY | O_APPEND | O_CREAT;
- } else {
- mde = O_RDONLY;
- }
- return(mde);
-}
-
-/* Get current position in file */
-long file_tell(int fp)
-{
- return(lseek(fp, 0L, SEEK_CUR));
-}
-
-/* lock the file, preferrably the POSIX way */
-int file_lock(int fd, int lock, char *filename)
-{
- int err;
-#ifdef USE_FLOCK
- if (flock(fd, lock) < 0) {
- err = errno;
- fprintf(stderr, ">>> %s flock file lock: %s\n", filename, strerror(err));
- return 0;
- }
-#else
- struct flock fl;
- fl.l_type = lock;
- fl.l_whence = SEEK_SET;
- fl.l_start = 0L;
- fl.l_len = 0L;
- fl.l_pid = getpid();
- if (fcntl(fd, F_SETLKW, &fl) < 0) {
- err = errno;
- fprintf(stderr, ">>> %s fcntl file lock: %s\n", filename, strerror(err));
- return 0;
- }
-#endif
- return 1;
-}
-
-/* unlock the file, preferrably the POSIX way */
-int file_unlock(int fd)
-{
-#ifdef USE_FLOCK
- if (flock(fd, LOCK_UN) < 0) {
- perror(">>> flock file unlock");
- return 0;
- }
-#else
- struct flock fl;
- fl.l_type = F_UNLCK;
- fl.l_whence = SEEK_SET;
- fl.l_start = 0L;
- fl.l_len = 0L;
- fl.l_pid = getpid();
- if (fcntl(fd, F_SETLKW, &fl) < 0) {
- perror(">>> fcntl file unlock");
- return 0;
- }
-#endif
- return 1;
-}
-
-/* Auto-determine from how the file was opened, what kind of lock to lock
- * the file with
- */
-int file_locktype(char *mode)
-{
-#ifdef USE_FLOCK
- if (NULL != (strchr(mode, 'w')) || (NULL != strchr(mode, '+')) || (NULL != strchr(mode, 'a')))
- return(LOCK_EX);
- return(LOCK_SH);
-#else
- if (NULL != (strchr(mode, 'w')) || (NULL != strchr(mode, '+')) || (NULL != strchr(mode, 'a')))
- return(F_WRLCK);
- return(F_RDLCK);
-#endif
-}
-
-/* Use standard fopen style modes to open the specified file. Also auto-determines and
- * locks the file either in shared or exclusive mode depending on opening mode
- */
-int file_open(char *filename, char *mode, int perm_specified, ...)
-{
- int fd;
- char error[250];
- va_list ap;
- int perm;
-
- if (perm_specified) {
- va_start(ap, perm_specified);
- perm = va_arg(ap, int);
- va_end(ap);
- }
- if (perm_specified) {
- fd = open(filename, file_getmode(mode), perm);
- } else {
- fd = open(filename, file_getmode(mode));
- }
- if (-1 == fd) {
- snprintf(error, 249, ">>> %s file mode: %s open", filename, mode);
- perror(error);
- return(fd);
- }
- /* Only lock the file if opening succeeded */
- if (-1 != fd) {
- if (0 == file_lock(fd, file_locktype(mode), filename)) {
- close(fd);
- return -1;
- }
- } else {
- snprintf(error, 249, ">>> %s file mode:%s open", filename, mode);
- perror(error);
- }
- return(fd);
-}
-
-/* Close and unlock file */
-void file_close(int fd)
-{
- if (-1 != fd) {
- file_unlock(fd);
- close(fd);
- }
-}
-
-/* Return length of file */
-long file_length(int fd)
-{
- long pos, len;
- pos = file_tell(fd);
- len = lseek(fd, 0L, SEEK_END);
- lseek(fd, pos, SEEK_SET);
- return(len);
-}
-
-/* Zero out file */
-int file_truncate(int fd)
-{
- lseek(fd, 0L, SEEK_SET);
- if (ftruncate(fd, 0) < 0) {
- perror(">>> file truncate");
- return 0;
- }
- return 1;
-}
-
-/* Check to see if a file exists Return: 1 success, 0 file not found, -1 error */
-int file_exist(char *filename, int checkmode)
-{
- struct stat mystat;
-
- /* Verify file exists and is regular file (not sym link) */
- if (checkmode) {
- if (-1 == lstat(filename, &mystat)) {
- /* file doesn't exist */
- if (ENOENT == errno) {
- return 0;
- } else { /* permission denied or other error */
- perror(">>> stat file");
- return -1;
- }
- }
- if (!S_ISREG(mystat.st_mode))
- return -1;
-
- /* Just plain verify the file exists */
- } else {
- if (-1 == stat(filename, &mystat)) {
- /* file does not exist */
- if (ENOENT == errno) {
- return 0;
- } else { /* permission denied or other error */
- perror(">>> stat file");
- return -1;
- }
- }
- }
-
- return 1;
-}
-
-
-// vim:expandtab noai:cindent ai
projects / portage.git / commitdiff