Bug#683826: Acknowledgement (cfsetspeed, real baud rates, custom baud rates (BOTHER))

[Ian Jackson]

PS here are the two test programs I wrote while preparing the bug
report.


#include <termios.h>
#include <stdio.h>
#include <stdlib.h>

#define    BOTHER 0010000

int main(int argc, const char **argv) {
  struct termios to;
  int r;
  r = tcgetattr(0, &to);  if (r) { perror("tcgetattr"); exit(-1); }

  const char *arg = argv[1];

  if (!arg) {
    printf("cfgetispeed=%lu cfgetospeed=%lu",
           (unsigned long)cfgetispeed(&to),
           (unsigned long)cfgetospeed(&to));
    if ((to.c_cflag & CBAUD) == BOTHER)
      printf(" BOTHER c_ispeed=%lu c_ospeed=%lu",
             (unsigned long)to.c_ispeed,
             (unsigned long)to.c_ospeed);
    putchar('\n');
    exit(0);
  }

  speed_t spd = atoi(arg);
  r = cfsetspeed(&to, spd);
  if (r) {
    perror("tcsetspeed failed (will do by hand)");
    to.c_ispeed = to.c_ospeed = spd;
    to.c_cflag &= ~CBAUD;
    to.c_cflag |= BOTHER;
  }
  r = tcsetattr(0, TCSANOW, &to);  if (r) { perror("tcsetattr"); exit(-1); }
  return 0;
}

#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include "/usr/include/asm-generic/termbits.h"
#include "/usr/include/asm-generic/ioctls.h"

#define    BOTHER 0010000

int main(int argc, const char **argv) {
  struct termios2 to;
  int r;

  r = ioctl(0, TCGETS2, &to);  if (r) { perror("TCGETS2"); exit(-1); }

  const char *arg = argv[1];
  if (!arg) {
    printf("c_cflag&CBAUD=0%lo", (unsigned long)(to.c_cflag&CBAUD));
    if ((to.c_cflag & CBAUD) == BOTHER)
      printf(" BOTHER c_ispeed=%lu c_ospeed=%lu",
             (unsigned long)to.c_ispeed,
             (unsigned long)to.c_ospeed);
    putchar('\n');
    exit(0);
  }

  speed_t spd = atoi(arg);
  to.c_ispeed = to.c_ospeed = spd;
  to.c_cflag &= ~CBAUD;
  to.c_cflag |= BOTHER;
  r = ioctl(0, TCSETS2, &to);  if (r) { perror("TCSETS2"); exit(-1); }
  return 0;
}