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/*
* Copyright © 2013 Guillem Jover <guillem@hadrons.org>
*
* 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``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 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.
*/
#include <unistd.h>
/*
* The automatic initialization cannot be part of the main shared library,
* because there is no thread-safe way to change the environ global
* variable. This is not a problem if the initializaion happens just at
* program load time, but becomes one if the shared library is directly or
* indirectly dlopen()ed during the execution of the program, which could
* have either kept references to the old environ or could change it in
* some other thread. This has been observed for example on systems using
* Samba NSS modules.
*
* To avoid any other possible fallout, the constructor is split into a
* new static library that needs to be linked explicitly into programs
* using setproctitle(). As an additional safety measure the pkg-config
* linker flags will mark the program as not allowing to be dlopen()ed
* so that we make sure to avoid the problem described above.
*/
/*
* Force setproctitle_init() function into the .init_array section instead of
* expecting either the compiler to place constructors there or the linker to
* move them from .ctors to .init_array.
*/
void (*libbsd_init_func)(int argc, char *argv[], char *envp[])
__attribute__((section(".init_array"))) = setproctitle_init;
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