[HP-UX]Is it a strict daemon process?

grace_limi

[HP-UX 11.00]

Reading from a classic UNIX book, a strict daemon process should have the following template:


#include        <sys/types.h>
#include        <sys/stat.h>
#include        <fcntl.h>

int main(void)
{
        pid_t   pid;

        if ( (pid = fork()) < 0)
                exit(-1);
        else if (pid != 0)
                exit(0);        /* parent goes bye-bye */

        /* child continues */
        setsid();               /* become session leader */

        chdir(\"/\";             /* change working directory */

        umask(0);               /* clear our file mode creation mask */

        if ( (pid = fork()) < 0)
                exit(-1);
        else if (pid != 0)
                exit(0);        /* parent goes bye-bye again */
        for (;
          sleep(10);
}

However, running on HP-UX 11.00, our system starts up as a daemon, using a quite different procedure:

#include <sys/types.h>
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>

static void sig_hup(int);

#define LOGFILE \"daemon3.log\"
FILE *fp;
int run_flag;

int main(void)
{ char c;
  pid_t pid;
  int fd;

  signal(SIGHUP, sig_hup);      /* establish signal handler */
  setpgrp();
  umask(0);
  fd = open( \"myfile\", 0 );
  dup2( fd, 0 );
  close( fd );
  fd = open( \"myfile\", 1 );
  dup2( fd, 1 );
  close( fd );
  fd = open( \"myfile\", 1 );
  dup2( fd, 2 );
  close( fd );
  if (fork()>0)
    exit(0);
  run_flag = 1;
  while (run_flag)
    sleep(5);
  exit(0);
}

static void sig_hup(int signo)
{ long now;

  now = time(0);
  fp = fopen(LOGFILE, \"a\";
  fprintf(fp, \"%sSIGHUP received, ppid=%d\\n\", ctime((time_t *)&now), getppid());
  fclose(fp);
  run_flag = 0;
  return;
}

Is it a strict daemon process? I doubt that it is not. But what are the security holes?