7.10.c

#include <setjmp.h>
#include "apue.h"

static void f1(int, int, int, int);
static void f2(void);

static jmp_buf jmpbuffer;
static int globval;

int main() {
  int autoval;
  register int regival;
  volatile int volaval;
  static int statval;

  globval = 1;
  autoval = 2;
  regival = 3;
  volaval = 4;
  statval = 5;

  if (setjmp(jmpbuffer) != 0) {
    printf("after longjmp:\n");
    printf(
        "globval = %d, autoval = %d, regival = %d, volaval = %d, "
        "statval = %d\n",
        globval, autoval, regival, volaval, statval);
    exit(0);
  }
  globval = 95;
  autoval = 96;
  regival = 97;
  volaval = 98;
  statval = 99;

  f1(autoval, regival, volaval, statval);
  exit(0);
}

static void f1(int i, int j, int k, int l) {
  printf("in f1():\n");
  printf(
      "globval = %d, autoval = %d, regival = %d,"
      " volaval = %d, statval = %d\n",
      globval, i, j, k, l);
  f2();
}

static void f2() { longjmp(jmpbuffer, 1); }