diff options
Diffstat (limited to 'lib/libc/gen')
| -rw-r--r-- | lib/libc/gen/Makefile.inc | 1 | ||||
| -rw-r--r-- | lib/libc/gen/Symbol.map | 4 | ||||
| -rw-r--r-- | lib/libc/gen/libc_dlopen.c | 61 |
3 files changed, 66 insertions, 0 deletions
diff --git a/lib/libc/gen/Makefile.inc b/lib/libc/gen/Makefile.inc index d3ccf0a..1e068a5 100644 --- a/lib/libc/gen/Makefile.inc +++ b/lib/libc/gen/Makefile.inc @@ -20,6 +20,7 @@ SRCS+= __getosreldate.c __xuname.c \ getpeereid.c getprogname.c getpwent.c getttyent.c \ getusershell.c getutxent.c getvfsbyname.c glob.c \ initgroups.c isatty.c isinf.c isnan.c jrand48.c lcong48.c \ + libc_dlopen.c \ lockf.c lrand48.c mrand48.c nftw.c nice.c \ nlist.c nrand48.c opendir.c \ pause.c pmadvise.c popen.c posix_spawn.c \ diff --git a/lib/libc/gen/Symbol.map b/lib/libc/gen/Symbol.map index c62e016..adc5964 100644 --- a/lib/libc/gen/Symbol.map +++ b/lib/libc/gen/Symbol.map @@ -381,6 +381,10 @@ FBSD_1.2 { setutxent; }; +FBSD_1.3 { + __FreeBSD_libc_enter_restricted_mode; +}; + FBSDprivate_1.0 { /* needed by thread libraries */ __thr_jtable; diff --git a/lib/libc/gen/libc_dlopen.c b/lib/libc/gen/libc_dlopen.c new file mode 100644 index 0000000..2b1aa9e --- /dev/null +++ b/lib/libc/gen/libc_dlopen.c @@ -0,0 +1,61 @@ +/*- + * Copyright (c) 2011 Xin Li <delphij@FreeBSD.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <dlfcn.h> +#include <stddef.h> +#include <unistd.h> + +#include "libc_private.h" + +/* + * Whether we want to restrict dlopen()s. + */ +static int __libc_restricted_mode = 0; + +void * +libc_dlopen(const char *path, int mode) +{ + + if (__libc_restricted_mode) { + _rtld_error("Service unavailable -- libc in restricted mode"); + return (NULL); + } else + return (dlopen(path, mode)); +} + +void +__FreeBSD_libc_enter_restricted_mode(void) +{ + + __libc_restricted_mode = 1; + return; +} + |
