#ifndef foodexechfoo#define foodexechfoo/* $Id: exec.h 4 2003-08-10 19:56:53Z lennart $ *//* * This file is part of libdaemon. * * libdaemon 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. * * libdaemon 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 libdaemon; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA */#include <stdarg.h>#ifdef __cplusplusextern "C" {#endif/** \file * * Contains a robust API for running sub processes with STDOUT and * STDERR redirected to syslog *//** This variable is defined to 1 iff daemon_exec() is supported.*/#define DAEMON_EXEC_AVAILABLE 1#if defined(__GNUC__) && ! defined(DAEMON_GCC_SENTINEL)/** A macro for making use of GCCs printf compilation warnings */#define DAEMON_GCC_SENTINEL __attribute__ ((sentinel))#else#define DAEMON_GCC_SENTINEL#endif    /** Run the specified executable with the specified arguments in the * specified directory and return the return value of the program in * the specified pointer. The calling process is blocked until the * child finishes and all child output (either STDOUT or STDIN) has * been written to syslog. Running this function requires that * daemon_signal() has been called with SIGCHLD as argument. *  * @param dir Working directory for the process. * @param ret A pointer to an integer to write the return value of the program to. * @param prog The path to the executable * @param ... The arguments to be passed to the program, followed by a (char *) NULL * @return Nonzero on failure, zero on success */int daemon_exec(const char *dir, int *ret, const char *prog, ...) DAEMON_GCC_SENTINEL;/** This variable is defined to 1 iff daemon_execv() is supported.*/#define DAEMON_EXECV_AVAILABLE 1/** The same as daemon_exec, but without variadic arguments */int daemon_execv(const char *dir, int *ret, const char *prog, va_list ap);    #ifdef __cplusplus}#endif#endif