init commit

2025-04-13 21:48:15 +03:00
commit 23255e9121
192 changed files with 12200 additions and 0 deletions
@@ -0,0 +1,74 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <wait.h>
+#include <time.h>
+#include <sys/types.h>
+
+enum
+{
+    YEAR_OFFSET = 1900
+};
+
+int
+main(void)
+{
+
+    int fd[2];
+    pipe(fd);
+    time_t delta;
+    struct tm *dt;
+
+    pid_t pid = fork();
+    if (pid == 0) {
+        pid = fork();
+
+        if (pid == 0) {
+            pid = fork();
+
+            if (pid == 0) {
+                close(fd[0]);
+
+                delta = time(NULL);
+                if (write(fd[1], &delta, sizeof(delta)) == -1 || write(fd[1], &delta, sizeof(delta)) == -1 ||
+                    write(fd[1], &delta, sizeof(delta)) == -1) {
+                    _exit(1);
+                }
+            } else if (pid == -1) {
+                _exit(1);
+            }
+            close(fd[1]);
+            wait(NULL);
+            if (read(fd[0], &delta, sizeof(delta)) == -1) {
+                _exit(1);
+            }
+            dt = localtime(&delta);
+            printf("D:%02d\n", dt->tm_mday);
+            fflush(stdout);
+            _exit(0);
+        } else if (pid == -1) {
+            _exit(1);
+        }
+
+        close(fd[1]);
+        wait(NULL);
+        if (read(fd[0], &delta, sizeof(delta)) == -1) {
+            _exit(1);
+        }
+        dt = localtime(&delta);
+        printf("M:%02d\n", dt->tm_mon + 1);
+        fflush(stdout);
+        _exit(0);
+    } else if (pid == -1) {
+        _exit(1);
+    }
+    close(fd[1]);
+    wait(NULL);
+    if (read(fd[0], &delta, sizeof(delta)) == -1) {
+        _exit(1);
+    }
+    dt = localtime(&delta);
+    printf("Y:%04d\n", dt->tm_year + YEAR_OFFSET);
+    fflush(stdout);
+
+    return 0;
+}