tty.c

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#endif                          /* USE_PTYS */

    return 0;                   /* OK */
}


/**************************** TTY MODE stuffs ****************************/

void get_term_mode(tty, termptr)
int tty;
struct term_mode *termptr;
{
#ifdef	TIOCSLTC
    (void) ioctl(tty, TIOCGLTC, (char *) &(termptr->ltc));
#endif
#ifdef	  TIOCLSET
    (void) ioctl(tty, TIOCLGET, (char *) &(termptr->lmode));
#endif
#ifdef	USE_SYSV_TERMIO
    (void) ioctl(tty, TCGETA, (char *) &(termptr->tio));
#else                           /* USE_SYSV_TERMIO */
    (void) ioctl(tty, TIOCGETP, (char *) &(termptr->sb));
    (void) ioctl(tty, TIOCGETC, (char *) &(termptr->tc));
    (void) ioctl(tty, TIOCGETD, (char *) &(termptr->ldis));
#endif                          /* USE_SYSV_TERMIO */
}

void set_term_mode(tty, termptr)
int tty;
struct term_mode *termptr;
{
#ifdef	TIOCSLTC
    (void) ioctl(tty, TIOCSLTC, (char *) &(termptr->ltc));
#endif
#ifdef	  TIOCLSET
    (void) ioctl(tty, TIOCLSET, (char *) &(termptr->lmode));
#endif
#ifdef	USE_SYSV_TERMIO
    (void) ioctl(tty, TCSETA, (char *) &(termptr->tio));
#else                           /* USE_SYSV_TERMIO */
    (void) ioctl(tty, TIOCSETP, (char *) &(termptr->sb));
    (void) ioctl(tty, TIOCSETC, (char *) &(termptr->tc));
    (void) ioctl(tty, TIOCSETD, (char *) &(termptr->ldis));
#endif                          /* USE_SYSV_TERMIO */
}

#ifndef _POSIX_VDISABLE
#define _POSIX_VDISABLE 0       /* or 0377? */
#endif

void make_raw(oldtermptr, newtermptr)
struct term_mode *oldtermptr, *newtermptr;
{
    *newtermptr = *oldtermptr;

#ifdef	TIOCSLTC
    newtermptr->ltc.t_suspc = 0377;
    newtermptr->ltc.t_dsuspc = 0377;
    newtermptr->ltc.t_flushc = 0377;
    newtermptr->ltc.t_lnextc = 0377;
#endif
#if  defined(TIOCLSET) && defined(LPASS8)
    newtermptr->lmode |= LPASS8;
#endif

#ifdef	USE_SYSV_TERMIO

    newtermptr->tio.c_iflag &= ~(ICRNL | IXON);
# ifdef	ISTRIP
    newtermptr->tio.c_iflag &= ~ISTRIP;
# endif
# ifdef ONLCR
    newtermptr->tio.c_oflag &= ~ONLCR;
# endif
    newtermptr->tio.c_cflag |= CS8;
    newtermptr->tio.c_cflag &= ~(PARENB);
    newtermptr->tio.c_lflag &= ~(ICANON | ISIG | ECHO);
    newtermptr->tio.c_cc[VMIN] = 1;
    newtermptr->tio.c_cc[VTIME] = 0;
    newtermptr->tio.c_cc[VINTR] = _POSIX_VDISABLE;
    newtermptr->tio.c_cc[VQUIT] = _POSIX_VDISABLE;
    newtermptr->tio.c_cc[VINTR] = _POSIX_VDISABLE;
# ifdef VSTART
    newtermptr->tio.c_cc[VSTART] = _POSIX_VDISABLE;
# endif
# ifdef VSTOP
    newtermptr->tio.c_cc[VSTOP] = _POSIX_VDISABLE;
# endif
# ifdef VDISCARD
    newtermptr->tio.c_cc[VDISCARD] = _POSIX_VDISABLE;
# endif
# ifdef VSUSP
    newtermptr->tio.c_cc[VSUSP] = _POSIX_VDISABLE;
# endif
# ifdef VDSUSP
    newtermptr->tio.c_cc[VDSUSP] = _POSIX_VDISABLE;
# endif

#else                           /* USE_SYSV_TERMIO */

    newtermptr->sb.sg_flags &= ~(CRMOD | ECHO);
    newtermptr->sb.sg_flags |= CBREAK;
    newtermptr->tc.t_quitc = _POSIX_VDISABLE;
    newtermptr->tc.t_intrc = _POSIX_VDISABLE;
    newtermptr->tc.t_startc = _POSIX_VDISABLE;
    newtermptr->tc.t_stopc = _POSIX_VDISABLE;

#endif                          /* USE_SYSV_TERMIO */
}

/******************************* UTMP stuffs *******************************/

#include <utmp.h>
#ifdef	HAS_UTMPX

# include <utmpx.h>
# define USE_SYSV_UTMP

  /*
   * utmpx is very similar to utmp 
   */
# define utmp		utmpx
# define ut_time	ut_xtime
# define setutent	setutxent
# define endutent	endutxent
# define getutid	getutxid
# define pututline	pututxline

#endif

#ifdef USE_SYSV_UTMP

# ifndef SVR4                   /* otherwise declared in utmp.h */
extern struct utmp *getutid();

#if (! defined(linux))
extern void pututline();
#endif
extern void setutent();
extern void endutent();
# endif                         /* !SVR4 */

# ifndef SYSV386
extern struct passwd *getpwuid();
# endif

extern time_t time();

#else                           /* not USE_SYSV_UTMP */

# define UTMP_FILENAME	"/etc/utmp"

#endif

#ifdef	CRAY
# define PTYCHLEN	4
#else
# define PTYCHLEN	2
#endif

/*
 * addutmp() and rmutmp() will run in different processes --
 * one in subsubprocess, and the other in subprocess.  There is no way to
 * pass values or the status to each other by means of global variables.
 */

/* addutmp() -- add a record to the utmp file */
void addutmp()
{
    struct utmp utmp;
    struct passwd *pw;

#ifndef	USE_SYSV_UTMP
    int utmpf;
    int tslot;
#endif

    pw = getpwuid(getuid());

#ifdef	USE_SYSV_UTMP

    (void) setutent();

    /*
     * set up entry to search for 
     */
    (void) bzero((char *) &utmp, sizeof(struct utmp));
    utmp.ut_type = DEAD_PROCESS;
    (void) strncpy((char *) utmp.ut_id, ttydev + strlen(ttydev) - PTYCHLEN, sizeof(utmp.ut_id));

    /*
     * position to entry in utmp file 
     */
    (void) getutid(&utmp);

    /*
     * set up the new entry 
     */
    (void) bzero((char *) &utmp, sizeof(struct utmp));
    utmp.ut_type = USER_PROCESS;
# ifdef	HAS_UTMPX
    utmpx.ut_exit.e_exit = 0;
    utmpx.ut_exit.e_termination = 0;
# else
#  if !defined(linux)
    utmp.ut_exit.e_exit = 2;
#  endif
# endif
    (void) strncpy((char *) utmp.ut_user, (pw && pw->pw_name) ? pw->pw_name : "???", sizeof(utmp.ut_user));
    (void) strncpy((char *) utmp.ut_id, ttydev + strlen(ttydev) - PTYCHLEN, sizeof(utmp.ut_id));
    utmp.ut_pid = getpid();

# ifdef	HAS_UTMPX
    utmpx.ut_syslen = 1;
    utmpx.ut_session = getsid(0);
    utmpx.ut_tv.tv_usec = 0;
# endif

#else                           /* USE_SYSV_UTMP */

# ifndef apollo
    tslot = ttyslot();
# else
    tslot = 1;
# endif

    utmpf = open(UTMP_FILENAME, O_WRONLY);
    if (utmpf < 0)
        return;
    bzero((char *) &utmp, sizeof(struct utmp));
#endif                          /* USE_SYSV_UTMP */

    /*
     * common utmp fields 
     */
    (void) strncpy(utmp.ut_line, ttydev + strlen("/dev/"), sizeof(utmp.ut_line));
    (void) strncpy(utmp.ut_name, (pw && pw->pw_name) ? pw->pw_name : "???", sizeof(utmp.ut_name));
    utmp.ut_time = time((time_t *) 0);

#ifdef	USE_SYSV_UTMP
    (void) pututline(&utmp);
    (void) endutent();
#else
    lseek(utmpf, (long) (tslot * sizeof(struct utmp)), 0);
    write(utmpf, (char *) &utmp, sizeof(struct utmp));
    close(utmpf);
#endif
}

void rmutmp(child_pid)
int child_pid;
{
    struct utmp utmp;

#ifdef	USE_SYSV_UTMP
    struct utmp *utptr;
#else
    int utmpf;
    int tslot;
#endif

#ifdef	USE_SYSV_UTMP
    (void) setutent();

    utmp.ut_type = USER_PROCESS;
    (void) bzero(utmp.ut_id, sizeof(utmp.ut_id));
    (void) strncpy((char *) utmp.ut_id, ttydev + strlen(ttydev) - PTYCHLEN, sizeof(utmp.ut_id));
    utptr = getutid(&utmp);

    /*
     * write it out only if it exists, and the pid's match 
     */
    if (utptr && (utptr->ut_pid == child_pid)) {
        utptr->ut_type = DEAD_PROCESS;
        utptr->ut_time = time((time_t *) 0);
        (void) pututline(utptr);
    }
    (void) endutent();

#else                           /* USE_SYSV_UTMP */

    utmpf = open(UTMP_FILENAME, O_RDWR);
    if (utmpf < 0)
        return;
    tslot = 0;
    while (read(utmpf, (char *) &utmp, sizeof(utmp)) == sizeof(utmp)) {
        if (strncmp(utmp.ut_line, ttydev + strlen("/dev/"), sizeof(utmp.ut_line)) != 0) {
            tslot++;
            continue;
        }

        /*
         * find the right slot 
         */
        utmp.ut_name[0] = '\0';
        utmp.ut_time = time((time_t *) 0);
        lseek(utmpf, (long) (tslot * sizeof(struct utmp)), 0);
        write(utmpf, (char *) &utmp, sizeof(struct utmp));
        close(utmpf);
        break;
    }

#endif                          /* USE_SYSV_UTMP */
    return;
}