~drizzle-trunk/drizzle/development

/* Copyright (C) 2003 MySQL AB

   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; version 2 of the License.

   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, write to the Free Software

   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

/* Wait until a program dies */

#include <mystrings/m_string.h>

#include <mysys/my_sys.h>

#include <mysys/my_getopt.h>

#include <signal.h>

#include <errno.h>

static const char *VER= "1.1";

static char *progname;

static bool verbose;

void usage(void);

static struct my_option my_long_options[] =

{

  {"help", '?', "Display this help and exit.", 0, 0, 0, GET_NO_ARG, NO_ARG, 0,

   0, 0, 0, 0, 0},

  {"help", 'I', "Synonym for -?.", 0, 0, 0, GET_NO_ARG, NO_ARG, 0,

   0, 0, 0, 0, 0},

  {"verbose", 'v',

   "Be more verbose. Give a warning, if kill can't handle signal 0.", 

   (char**) &verbose, (char**) &verbose, 0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},

  {"version", 'V', "Print version information and exit.", 0, 0, 0,

   GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},

  { 0, 0, 0, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}

};

static bool

get_one_option(int optid, const struct my_option *opt __attribute__((unused)),

	       char *argument __attribute__((unused)))

{

  switch(optid) {

  case 'V':

    printf("%s version %s by Jani Tolonen\n", progname, VER);

    exit(-1);

  case 'I':

  case '?':

    usage();

  }

  return 0;

}

int main(int argc, char *argv[])

{

  int pid= 0, t= 0, sig= 0;

  progname= argv[0];

  if (handle_options(&argc, &argv, my_long_options, get_one_option))

    exit(-1);

  if (!argv[0] || !argv[1] || (pid= atoi(argv[0])) <= 0 ||

      (t= atoi(argv[1])) <= 0)

    usage();

  for (; t > 0; t--)

  {

    if (kill((pid_t) pid, sig))

    {

      if (errno == EINVAL)

      {

	if (verbose)

	  printf("WARNING: kill couldn't handle signal 0, using signal 1.\n");

	sig= 1;

	t++;

	continue;

      }

      return 0;

    }

    sleep(1);

  }

  return 1;

}

void usage(void)

{

  printf("%s version %s by Jani Tolonen\n\n", progname, VER);

  printf("usage: %s [options] #pid #time\n\n", progname);

  printf("Description: Waits for a program, which program id is #pid, to\n");

  printf("terminate within #time seconds. If the program terminates within\n");

  printf("this time, or if the #pid no longer exists, value 0 is returned.\n");

  printf("Otherwise 1 is returned. Both #pid and #time must be positive\n");

  printf("integer arguments.\n\n");

  printf("Options:\n");

  my_print_help(my_long_options);

  exit(-1);

}