apps/autocampars/autocampars.c

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/*!***************************************************************************
*! FILE NAME  : autocampars.c
*! DESCRIPTION: Daemon to save/restore parameter (calls autocampars.php)
*!              This program is needed not to have an extra instance of
*!              PHP (2+ MB) just waiting as a daemon.
*! Copyright (C) 2008 Elphel, Inc.
*! -----------------------------------------------------------------------------**
*!  This program is free software: you can redistribute it and/or modify
*!  it under the terms of the GNU General Public License as published by
*!  the Free Software Foundation, either version 3 of the License, or
*!  (at your option) any later version.
*!
*!  This program 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 General Public License for more details.
*!
*!  You should have received a copy of the GNU General Public License
*!  along with this program.  If not, see <http://www.gnu.org/licenses/>.
*! -----------------------------------------------------------------------------**
*!
*!  $Log: autocampars.c,v $
*!  Revision 1.1.1.1  2008/11/27 20:04:01  elphel
*!
*!
*!  Revision 1.4  2008/11/22 05:52:47  elphel
*!  added TODO
*!
*!  Revision 1.3  2008/11/18 07:37:10  elphel
*!  snapshot
*!
*!  Revision 1.2  2008/11/17 23:42:59  elphel
*!  snapshot
*!
*!  Revision 1.1  2008/11/17 06:41:20  elphel
*!  8.0.alpha18 - started autocampars - camera parameters save/restore/init manager
*!
*!
*/ 
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <fcntl.h>
#include <errno.h>

#include <asm/elphel/c313a.h>
int main (int argc, char *argv[]) {
  const char framepars_driver_name[]="/dev/frameparsall";
//  const char php_path[]="/usr/local/sbin/php";
  const char script_path[]="/usr/html/autocampars.php";
  int fd_fparmsall= open(framepars_driver_name, O_RDWR);
  unsigned long write_data[4]; 
  int rslt;
  if (fd_fparmsall <0) {
     ELP_FERR(fprintf(stderr, "Open failed: (%s)\n", framepars_driver_name));
     exit (1);
  }
  while (1) {
   lseek(fd_fparmsall, LSEEK_DAEMON_FRAME+DAEMON_BIT_AUTOCAMPARS, SEEK_END);   
   write_data[0]= FRAMEPARS_SETFRAMEREL;
   write_data[1]= 1;
   write_data[2]= P_DAEMON_EN_AUTOCAMPARS;
   write_data[3]= 0;
   rslt=write(fd_fparmsall, write_data, sizeof(write_data));
   if (rslt < sizeof(write_data)) {
     ELP_FERR(fprintf(stderr, "Failed writing to %s\n", framepars_driver_name));
     exit (1); 
   }
   fprintf(stderr, "autocampars triggered\n");
   signal(SIGCHLD, SIG_IGN); // no zombies
   if (fork() == 0) {
       fflush(stdout);
       fflush(stderr);
//       rslt= execl(php_path, "-q", script_path, "", "--daemon", (char *) NULL); /// We do not need to pass any parameters here, but if we had to - first argument is lost (probably to "-q" in the script line 1
       rslt= execl(script_path, "", "--daemon", (char *) NULL); 
       ELP_FERR(fprintf(stderr, "execl failed, returned %d, errno=%d\n", rslt,errno));
      _exit(2);
   } // end of child process
   lseek(fd_fparmsall, LSEEK_FRAME_WAIT_REL+1, SEEK_END);   
  }
  return 0;
}

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