413 lines
7.0 KiB
C
413 lines
7.0 KiB
C
/* clktest.c,v 3.1 1993/07/06 01:05:23 jbj Exp
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* clktest - test the clock line discipline
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*
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* usage: clktest -b bps -f -t timeo -s cmd -c char1 -a char2 /dev/whatever
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*/
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#include "clktest-opts.h"
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#define STREQ(a, b) (*(a) == *(b) && strcmp((a), (b)) == 0)
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#if defined(ULT_2_0_SUCKS)
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#ifndef sigmask
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#define sigmask(m) (1<<(m))
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#endif
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#endif
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#ifndef STREAM
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# ifndef CLKLDISC
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CLOCK_LINE_DISCIPLINE_NEEDED_BY_THIS_PROGRAM;
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# endif
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#else
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# ifdef CLKLDISC
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ONLY_ONE_CLOCK_LINE_DISCIPLINE_FOR_THIS_PROGRAM;
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# endif
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#endif
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/*
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* Mask for blocking SIGIO and SIGALRM
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*/
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#define BLOCKSIGMASK (sigmask(SIGIO)|sigmask(SIGALRM))
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#define progname clktestOptions.pzProgName
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struct timeval timeout = { 0 };
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char *cmd = NULL;
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int cmdlen;
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#ifdef CLKLDISC
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u_long magic1 = DEFMAGIC;
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u_long magic2 = DEFMAGIC;
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#endif
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int speed = B9600;
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int ttflags = RAW|EVENP|ODDP;
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volatile int wasalarmed;
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volatile int iosig;
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struct timeval lasttv;
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extern u_long ustotslo[];
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extern u_long ustotsmid[];
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extern u_long ustotshi[];
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int alarming();
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int ioready();
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/*
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* main - parse arguments and handle options
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*/
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int
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main(
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int argc,
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char *argv[]
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)
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{
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int fd;
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struct sgttyb ttyb;
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struct itimerval itimer;
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#ifdef STREAM
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magic[0] = 0;
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#endif
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{
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int ct = optionProcess( &clktestOptions, argc, argv );
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if (HAVE_OPT(COMMAND) && (strlen(OPT_ARG(COMMAND)) == 0)) {
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fputs( "The command option string must not be empty\n", stderr );
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USAGE( EXIT_FAILURE );
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}
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if ((argc -= ct) != 1) {
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fputs( "Missing tty device name\n", stderr );
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USAGE( EXIT_FAILURE );
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}
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argv += ct;
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}
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#ifdef STREAM
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if (!strlen(magic))
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strcpy(magic,DEFMAGIC);
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#endif
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fd = open(*argv, HAVE_OPT(TIMEOUT) ? O_RDWR : O_RDONLY, 0777);
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if (fd == -1) {
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fprintf(stderr, "%s: open(%s): ", progname, *argv);
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perror("");
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exit(1);
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}
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if (ioctl(fd, TIOCEXCL, (char *)0) < 0) {
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(void) fprintf(stderr, "%s: ioctl(TIOCEXCL): ", progname);
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perror("");
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exit(1);
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}
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/*
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* If we have the clock discipline, set the port to raw. Otherwise
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* we run cooked.
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*/
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ttyb.sg_ispeed = ttyb.sg_ospeed = speed;
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#ifdef CLKLDISC
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ttyb.sg_erase = (char)magic1;
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ttyb.sg_kill = (char)magic2;
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#endif
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ttyb.sg_flags = (short)ttflags;
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if (ioctl(fd, TIOCSETP, (char *)&ttyb) < 0) {
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(void) fprintf(stderr, "%s: ioctl(TIOCSETP): ", progname);
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perror("");
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exit(1);
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}
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if (fcntl(fd, F_SETOWN, getpid()) == -1) {
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(void) fprintf(stderr, "%s: fcntl(F_SETOWN): ", progname);
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perror("");
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exit(1);
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}
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#ifdef CLKLDISC
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{
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int ldisc;
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ldisc = CLKLDISC;
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if (ioctl(fd, TIOCSETD, (char *)&ldisc) < 0) {
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(void) fprintf(stderr, "%s: ioctl(TIOCSETD): ", progname);
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perror("");
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exit(1);
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}
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}
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#endif
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#ifdef STREAM
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if (ioctl(fd, I_POP, 0) >=0 ) ;
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if (ioctl(fd, I_PUSH, "clk") < 0) {
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(void) fprintf(stderr, "%s: ioctl(I_PUSH): ", progname);
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perror("");
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exit(1);
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}
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if (ioctl(fd, CLK_SETSTR, magic) < 0) {
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(void) fprintf(stderr, "%s: ioctl(CLK_SETSTR): ", progname);
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perror("");
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exit(1);
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}
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#endif
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(void) gettimeofday(&lasttv, (struct timezone *)0);
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if (HAVE_OPT(TIMEOUT)) {
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/*
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* set non-blocking, async I/O on the descriptor
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*/
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iosig = 0;
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(void) signal(SIGIO, ioready);
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if (fcntl(fd, F_SETFL, FNDELAY|FASYNC) < 0) {
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(void) fprintf(stderr, "%s: fcntl(F_SETFL): ",
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progname);
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perror("");
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exit(1);
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}
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/*
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* Set up the alarm interrupt.
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*/
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wasalarmed = 0;
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(void) signal(SIGALRM, alarming);
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timeout.tv_sec = OPT_VALUE_TIMEOUT;
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itimer.it_interval = itimer.it_value = timeout;
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setitimer(ITIMER_REAL, &itimer, (struct itimerval *)0);
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doboth(fd);
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}
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doioonly(fd);
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}
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/*
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* doboth - handle both I/O and alarms via SIGIO
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*/
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int
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doboth(
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int fd
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)
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{
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int n;
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int sawalarm;
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int sawiosig;
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int omask;
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fd_set fds;
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struct timeval tvzero;
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sawalarm = 0;
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sawiosig = 0;
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FD_ZERO(&fds);
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for (;;) {
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omask = sigblock(BLOCKSIGMASK);
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if (wasalarmed) { /* alarmed? */
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sawalarm = 1;
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wasalarmed = 0;
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}
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if (iosig) {
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sawiosig = 1;
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iosig = 0;
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}
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if (!sawalarm && !sawiosig) {
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/*
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* Nothing to do. Wait for something.
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*/
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sigpause(omask);
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if (wasalarmed) { /* alarmed? */
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sawalarm = 1;
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wasalarmed = 0;
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}
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if (iosig) {
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sawiosig = 1;
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iosig = 0;
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}
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}
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(void)sigsetmask(omask);
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if (sawiosig) {
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do {
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tvzero.tv_sec = tvzero.tv_usec = 0;
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FD_SET(fd, &fds);
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n = select(fd+1, &fds, (fd_set *)0,
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(fd_set *)0, &tvzero);
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if (n > 0)
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doio(fd);
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} while (n > 0);
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if (n == -1) {
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(void) fprintf(stderr, "%s: select: ",
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progname);
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perror("");
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exit(1);
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}
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sawiosig = 0;
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}
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if (sawalarm) {
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doalarm(fd);
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sawalarm = 0;
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}
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}
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}
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/*
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* doioonly - do I/O. This avoids the use of signals
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*/
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int
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doioonly(
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int fd
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)
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{
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int n;
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fd_set fds;
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FD_ZERO(&fds);
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for (;;) {
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FD_SET(fd, &fds);
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n = select(fd+1, &fds, (fd_set *)0, (fd_set *)0,
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(struct timeval *)0);
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if (n > 0)
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doio(fd);
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}
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}
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/*
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* doio - read a buffer full of stuff and print it out
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*/
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int
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doio(
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int fd
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)
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{
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register char *rp, *rpend;
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register char *cp;
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register int i;
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char raw[512];
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struct timeval tv, tvd;
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int rlen;
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int ind;
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char cooked[2049];
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static char *digits = "0123456789abcdef";
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rlen = read(fd, raw, sizeof(raw));
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if (rlen < 0) {
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(void) fprintf(stderr, "%s: read(): ", progname);
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perror("");
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return;
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}
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if (rlen == 0) {
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(void) printf("Zero length read\n");
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return;
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}
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cp = cooked;
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rp = raw;
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rpend = &raw[rlen];
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ind = 0;
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while (rp < rpend) {
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ind = 1;
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if (isprint(*rp))
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*cp++ = *rp;
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else {
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*cp++ = '<';
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*cp++ = digits[((*rp)>>4) & 0xf];
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*cp++ = digits[*rp & 0xf];
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*cp++ = '>';
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}
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if (
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#ifdef CLKLDISC
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(*rp == (char)magic1 || *rp == (char)magic2)
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#else
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( strchr( magic, *rp) != NULL )
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#endif
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) {
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rp++;
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ind = 0;
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*cp = '\0';
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if ((rpend - rp) < sizeof(struct timeval)) {
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(void)printf(
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"Too little data (%d): %s\n",
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rpend-rp, cooked);
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return;
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}
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tv.tv_sec = 0;
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for (i = 0; i < 4; i++) {
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tv.tv_sec <<= 8;
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tv.tv_sec |= ((long)*rp++) & 0xff;
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}
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tv.tv_usec = 0;
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for (i = 0; i < 4; i++) {
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tv.tv_usec <<= 8;
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tv.tv_usec |= ((long)*rp++) & 0xff;
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}
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tvd.tv_sec = tv.tv_sec - lasttv.tv_sec;
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tvd.tv_usec = tv.tv_usec - lasttv.tv_usec;
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if (tvd.tv_usec < 0) {
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tvd.tv_usec += 1000000;
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tvd.tv_sec--;
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}
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(void)printf("%lu.%06lu %lu.%06lu %s\n",
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tv.tv_sec, tv.tv_usec, tvd.tv_sec, tvd.tv_usec,
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cooked);
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lasttv = tv;
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} else {
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rp++;
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}
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}
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if (ind) {
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*cp = '\0';
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(void)printf("Incomplete data: %s\n", cooked);
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}
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}
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/*
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* doalarm - send a string out the port, if we have one.
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*/
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int
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doalarm(
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int fd
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)
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{
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int n;
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if (! HAVE_OPT(COMMAND))
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return;
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n = write(fd, cmd, cmdlen);
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if (n < 0) {
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(void) fprintf(stderr, "%s: write(): ", progname);
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perror("");
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} else if (n < cmdlen) {
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(void) printf("Short write (%d bytes, should be %d)\n",
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n, cmdlen);
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}
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}
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/*
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* alarming - receive alarm interupt
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*/
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void
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alarming(void)
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{
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wasalarmed = 1;
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}
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/*
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* ioready - handle SIGIO interrupt
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*/
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void
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ioready(void)
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{
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iosig = 1;
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}
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