#include <stdlib.h>
#include <string.h>
#include <dlfcn.h>
#include <sys/utsname.h>
/* compile as:
 *
 * > gcc -fPIC -G -c uname.c
 * > ld -G -o uname.so uname.o
 * > LD_PRELOAD=uname.so # or wherever you put it
 * > RELEASE=5.8
 * > export LD_PRELOAD RELEASE
 * > uname
 */
int uname(struct utsname *name)
{

  static int (*uname_real)();
  register int rc;
  register char *p;
  if (uname_real==NULL)
    uname_real = (int (*) ()) dlsym(RTLD_NEXT, "uname");

  if ((rc = uname_real(name)) != -1) {

    if ((p=getenv("SYSNAME"))!=NULL) {
      strncpy(name->sysname,p,SYS_NMLN-1);
      name->sysname[SYS_NMLN-1]='\0';
    }
    if ((p=getenv("NODENAME"))!=NULL) {
      strncpy(name->nodename,p,SYS_NMLN-1);
      name->nodename[SYS_NMLN-1]='\0';
    }
    if ((p=getenv("RELEASE"))!=NULL) {
      strncpy(name->release,p,SYS_NMLN-1);
      name->release[SYS_NMLN-1]='\0';
    }
    if ((p=getenv("VERSION"))!=NULL) {
      strncpy(name->version,p,SYS_NMLN-1);
      name->version[SYS_NMLN-1]='\0';
    }
    if ((p=getenv("MACHINE"))!=NULL) {
      strncpy(name->machine,p,SYS_NMLN-1);
      name->machine[SYS_NMLN-1]='\0';
    }
  }
  return rc;
}