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test
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test6.c
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C/C++ Source or Header
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1990-07-23
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91 lines
/* test 6 */
#define MAX_ERROR 4
extern char *brk(), *sbrk();
extern int errno;
int errct;
int subtest = 1;
main()
{
int i;
printf("Test 6 ");
for (i = 0; i < 70; i++) {
test60();
}
if (errct == 0)
printf("ok\n");
else
printf(" %d errors\n", errct);
exit(0);
}
test60()
{
/* Test sbrk() and brk(). */
char *addr, *addr2, *addr3;
int i, del, click, click2;
addr = sbrk(0);
addr = sbrk(0); /* force break to a click boundary */
for (i = 0; i < 10; i++) sbrk(7 * i);
for (i = 0; i < 10; i++) sbrk(-7 * i);
if (sbrk(0) != addr) e(1);
sbrk(30);
if (brk(addr) != 0) e(2);
if (sbrk(0) != addr) e(3);
del = 0;
do {
del++;
brk(addr + del);
addr2 = sbrk(0);
} while (addr2 == addr);
click = addr2 - addr;
sbrk(-1);
if (sbrk(0) != addr) e(4);
brk(addr);
if (sbrk(0) != addr) e(5);
del = 0;
do {
del++;
brk(addr - del);
addr3 = sbrk(0);
} while (addr3 == addr);
click2 = addr - addr3;
sbrk(1);
if (sbrk(0) != addr) e(6);
brk(addr);
if (sbrk(0) != addr) e(8);
if (click != click2) e(9);
brk(addr + 2 * click);
if (sbrk(0) != addr + 2 * click) e(10);
sbrk(3 * click);
if (sbrk(0) != addr + 5 * click) e(11);
sbrk(-5 * click);
if (sbrk(0) != addr) e(12);
}
e(n)
int n;
{
int err_num = errno; /* save errno in case printf clobbers it */
printf("Subtest %d, error %d errno=%d ", subtest, n, errno);
errno = err_num; /* restore errno, just in case */
perror("");
if (errct++ > MAX_ERROR) {
printf("Too many errors; test aborted\n");
exit(1);
}
}