c/pause.c

@@ -0,0 +1,6 @@
+#include <unistd.h>
+
+int main(void) {
+    pause();
+    return 0;
+}

python/fork.py

@@ -0,0 +1,14 @@
+#!/usr/bin/python3
+
+import os, sys
+
+ret = os.fork()
+if ret == 0:
+    print("child process: pid={}, parent process's pid={}".format(os.getpid(), os.getppid()))
+    os.execve("/bin/echo", ["echo", "hello from pid={} ".format(os.getpid())], {})
+    exit()
+elif ret > 0:
+    print("parent process: pid={}, child process's pid={}".format(os.getpid(), ret))
+    exit()
+
+sys.exit(1)

python/spawn.py

@@ -0,0 +1,6 @@
+#!/usr/bin/python3
+
+import os
+
+os.posix_spawn("/bin/echo", ["echo", "echo", "created by posix_spawn()"], {})
+print("created echo command")