switch to mmap - bsleep - Unnamed repository; edit this file 'description' to name the repository.
   DIR Log
   DIR Files
   DIR Refs
   DIR README
   DIR LICENSE
       ---
   DIR commit 93eeaeaabcd36f08039ac5ea94ea7e309f2eccb0
   DIR parent dc93ba1a8438c25f25be6ddfb051d48b028f9171
  HTML Author: kroovy <me@kroovy.de>
       Date:   Tue, 25 Feb 2025 00:25:30 +0100
       
       switch to mmap
       
       Diffstat:
         M bsleep.c                            |      74 ++++++++-----------------------
       
       1 file changed, 19 insertions(+), 55 deletions(-)
       ---
   DIR diff --git a/bsleep.c b/bsleep.c
       @@ -1,66 +1,30 @@
        #define _POSIX_SOURCE
        #include <signal.h>
       -#include <stdint.h>
        #include <stdio.h>
        #include <stdlib.h>
       -#include <sys/types.h>
       +#include <sys/mman.h>
        #include <unistd.h>
        
        int
        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 */
       -                
       -                /* setup */
       -                close(fd[1]);
       -                
       -                /* read button press + count seconds */
       -                for (i=1;;i++) {
       -                        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 */
       -                
       -                /* setup */
       -                close(fd[0]);
       -                system("/bin/stty raw -echo");
       -                
       -                /* handle button-press */
       -                while ((in = getchar()) != 'b') {
       -                        write(fd[1], &in, sizeof(char));
       -                }
       +        int i;
       +        int *shared_memory = mmap(NULL, sizeof(char), PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, -1, 0);
       +
       +        pid_t pid = fork();
       +
       +        if (pid == 0) {
       +                /* CHILD */
       +                for (i=1;;i++) {
       +                        printf("\r[ press 'b' to interrupt: %ds ] [ '%c' was pressed ] ", i, *shared_memory); fflush(stdout);
       +                        sleep(1);
       +                }
       +        } else {
       +                /* PARENT */
       +                system("/bin/stty raw -echo");
       +                while ((*shared_memory = getchar()) != 'b');
                        kill(pid, SIGKILL);
       -                
       -                /* cleanup */
       -                close(fd[1]);
       -                system("/bin/stty cooked echo");
       -                printf("\n");
       -                exit(EXIT_SUCCESS);
       -        }
       +                system("/bin/stty cooked echo");
       +                printf("\n");
       +        }
        }