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---
DIR commit dc93ba1a8438c25f25be6ddfb051d48b028f9171
DIR parent 792145777faf160260aaf3b13f78221627c75bec
HTML Author: kroovy <me@kroovy.de>
Date: Mon, 24 Feb 2025 20:21:00 +0100
use pipe (bugged)
Diffstat:
M bsleep.c | 37 ++++++++++++++++++++++++++-----
1 file changed, 31 insertions(+), 6 deletions(-)
---
DIR diff --git a/bsleep.c b/bsleep.c
@@ -11,29 +11,54 @@ main(void)
{
int i, in;
pid_t pid;
-
+ int fd[2];
+ char c = ' ';
+
+ if (pipe(fd) == -1) {
+ printf("An error ocurred with opening the pipe\n");
+ }
if (signal(SIGCHLD, SIG_IGN) == SIG_ERR) {
perror("signal");
exit(EXIT_FAILURE);
}
pid = fork();
-
+
switch (pid) {
case -1:
perror("fork");
exit(EXIT_FAILURE);
+
case 0:
- /* child */
+ /* CHILD */
+
+ /* setup */
+ close(fd[1]);
+
+ /* read button press + count seconds */
for (i=1;;i++) {
- printf(" press 'b' to interrupt: %ds\r", i); fflush(stdout);
+ pread(fd[0], &c, sizeof(char), 0);
+ printf("\r[ press 'b' to interrupt: %ds ] [ '%c' was pressed ] ", i, c); fflush(stdout);
sleep(1);
}
+ /* cleanup */
+ close(fd[0]);
exit(EXIT_SUCCESS);
+
default:
- /* parent */
+ /* PARENT */
+
+ /* setup */
+ close(fd[0]);
system("/bin/stty raw -echo");
- while ((in = getchar()) != 'b'); /* loop */
+
+ /* handle button-press */
+ while ((in = getchar()) != 'b') {
+ write(fd[1], &in, sizeof(char));
+ }
kill(pid, SIGKILL);
+
+ /* cleanup */
+ close(fd[1]);
system("/bin/stty cooked echo");
printf("\n");
exit(EXIT_SUCCESS);