* Copyright 2019, Jérôme Duval, jerome.duval@gmail.com.
* Distributed under the terms of the MIT License.
*/
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
extern const char *__progname;
int
main(int argc, char **argv)
{
if (argc < 2) {
fprintf(stderr, "usage: %s <file>\n", __progname);
return 1;
}
int fd = open(argv[1], O_RDONLY);
if (fd < 0) {
fprintf(stderr, "%s: could open the file read-only \"%s\": %s\n",
__progname, argv[1], strerror(errno));
return 1;
}
int err = tcdrain(fd);
if (err != -1 || errno != ENOTTY) {
fprintf(stderr, "%s: tcdrain didn't fail with ENOTTY \"%s\": %s\n",
__progname, argv[1], strerror(errno));
close(fd);
return 1;
}
err = tcflow(fd, TCION);
if (err != -1 || errno != ENOTTY) {
fprintf(stderr, "%s: tcflow didn't fail with ENOTTY \"%s\": %s\n",
__progname, argv[1], strerror(errno));
close(fd);
return 1;
}
err = tcflush(fd, TCIOFLUSH);
if (err != -1 || errno != ENOTTY) {
fprintf(stderr, "%s: tcflush didn't fail with ENOTTY \"%s\": %s\n",
__progname, argv[1], strerror(errno));
close(fd);
return 1;
}
close(fd);
return 0;
}
