init commit

3sem/cnts/contest12/02.c

@@ -0,0 +1,36 @@
+#include <unistd.h>
+#include <sys/wait.h>
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+
+int
+run(const char *cmd)
+{
+    pid_t pid = fork();
+    if (pid == -1) {
+        exit(1);
+    } else if (pid == 0) {
+        execlp(cmd, cmd, NULL);
+        _exit(1);
+    }
+    int status;
+    waitpid(pid, &status, 0);
+
+    return WIFEXITED(status) && !WEXITSTATUS(status);
+} // 1 - при успехе
+
+int
+main(int argc, char **argv)
+{
+    if (argc != 4) {
+        return 1;
+    }
+
+    char *cmd1 = argv[1];
+    char *cmd2 = argv[2];
+    char *cmd3 = argv[3];
+
+    return !((run(cmd1) || run(cmd2)) && run(cmd3));
+}