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diskd.c

#include <sys/types.h>
#include <sys/time.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <linux/fd.h>
#include <linux/fdreg.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <linux/major.h>
#include "enh_options.h"


int eioctl(int fd, int command,void * param, char *emsg)
{
  int r;
  if ((r=ioctl(fd,command,param))<0 )
    {
      perror(emsg);
      exit(1);
    }
  return r;
}

static char procFd[80];


int doPoll(int fd,
         struct floppy_drive_params *dpr,
         struct floppy_drive_struct *state)
{
      if(! (dpr->flags & FD_SILENT_DCL_CLEAR)) {
            /* Work around a bug in floppy driver when silent dcl is not
               set */
            struct floppy_raw_cmd raw_cmd;
            int fd2;
            fd2=open(procFd, 3 | O_NDELAY);
            if(fd2 != -1)
                  close(fd2);
            /* Perform "dummy" rawcmd to flush out newchange */
            raw_cmd.flags = FD_RAW_NEED_DISK;
            raw_cmd.cmd_count = 0;
            raw_cmd.track = 0;
            ioctl(fd, FDRAWCMD, &raw_cmd, "rawcmd");
      }
      eioctl(fd, FDPOLLDRVSTAT, state, "reset");
      return state->flags;
}

int main(int argc, char **argv)
{
      int mask=0;
      int fd=-2;
      char *command=0;
      int interval=10;
      int ch;
      struct timeval timval;
      struct floppy_drive_struct state;
      struct floppy_drive_params dpr;

      struct enh_options optable[] = {
      { 'd', "drive", 1, EO_TYPE_FILE_OR_FD, 3, 0,
              (void *) &fd,
              "drive to be polled"},
            
      { 'e', "exec", 1, EO_TYPE_STRING, 0, 0,
              (void *) &command,
              "shell command to be executed after disk insertion" },
            
      { 'i', "interval", 1, EO_TYPE_LONG, 0, 0, 
              (void *) &interval,
              "set polling interval (in tenth of seconds)" },
      { '\0', 0 }       
      };

      while((ch=getopt_enh(argc, argv, optable, 
                       0, &mask, "drive") ) != EOF ){
            if ( ch== '?' ){
                  fprintf(stderr,"exiting\n");
                  exit(1);
            }
            printf("unhandled option %d\n", ch);
            exit(1);
      }

      if ( fd == -2 )
            fd = open("/dev/fd0", 3 | O_NDELAY);
      if ( fd < 0 ){
            perror("can't open floppy drive");
            exit(1);
      }

      eioctl(fd,FDGETDRVPRM,(void *) &dpr, "Get drive parameters");
      sprintf(procFd, "/proc/self/fd/%d", fd);

      doPoll(fd, &dpr, &state);
      while (state.flags & (FD_VERIFY|FD_DISK_NEWCHANGE)) {
            timval.tv_sec = interval / 10;
            timval.tv_usec = (interval % 10) * 100000;
            select(0, 0, 0, 0, &timval);
            doPoll(fd, &dpr, &state);
      } 
      close(fd);
      if ( command)
            system(command);
      exit(0);
}

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