The Sleepless Library

• #include <stdio.h>

• #define __USE_GNU // This is needed for the RTLD_NEXT definition

• #include <dlfcn.h>

• unsigned int sleep(unsigned int seconds) {

• unsigned int (*origsleep)(unsigned int);

• char * error;

• origsleep = dlsym(RTLD_NEXT, "sleep");

• if ((error = dlerror()) != NULL) {

• fprintf (stderr, "%s\n", error);

• exit(1);

• }

• printf("sleep less, do more\n");

• origsleep((seconds / 2));

• }

• /* Compile with:

• gcc sleepless.c -o sleepless.so -ldl -shared

• */