#include <sys/types.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>

#define MOUSEDEV "/dev/mouse"

/*
 * Program to reinitialize Logitech MouseMan to Microsoft-compatible mode.
 * Donated to the public domain.  Robert K. Nichols, 1996.
 *                                <rnichols@interaccess.com>
 */

int main(int argc, char **argv) {
    char *cmd;
    char *devname = NULL;
    int fd;
    int pbits = 0;
    
    if((cmd = strrchr(argv[0], '/')) != NULL)  ++cmd;
    else  cmd = argv[0];

    for( ; argc > 1; ++argv, --argc) {
	if(strcmp(argv[1], "DTR") == 0) {
	    pbits |= TIOCM_DTR;
	    continue;
	}
	else if(strcmp(argv[1], "RTS") == 0) {
	    pbits |= TIOCM_RTS;
	    continue;
	}
	else if(strncmp(argv[1], "/dev/", 5) == 0) {
	    devname = argv[1];
	    continue;
	}
	else {
	    fprintf(stderr, "%s: Unknown arg: \"%s\"\n", cmd, argv[1]);
	    exit(1);
	}
    }

    if(pbits == 0)  pbits = TIOCM_RTS;

    if(devname == NULL)  devname = MOUSEDEV;
    if((fd = open(devname, O_RDWR | O_NDELAY)) < 0) {
	fprintf(stderr, "%s: Can't open %s: (%d) %s\n", cmd, devname, errno,
		(errno < sys_nerr) ? sys_errlist[errno] : "???");
	exit(1);
    }
    
    /* Port is opened, so controls signal(s) are high. Clear them. */
    if(ioctl(fd, TIOCMBIC, &pbits) < 0) {
	fprintf(stderr, "%s: ioctl(TIOCMBIC): (%d) %s\n", cmd, errno,
		(errno < sys_nerr) ? sys_errlist[errno] : "???");
	exit(1);
    }

    /* Now set them high again. */
    if(ioctl(fd, TIOCMBIS, &pbits) < 0) {
	fprintf(stderr, "%s: ioctl(TIOCMBIS): (%d) %s\n", cmd, errno,
		(errno < sys_nerr) ? sys_errlist[errno] : "???");
    }
    
    /* Initialize mouse */
    write(fd, "*n", 2);
    return(0);
}