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linux-kselftest-fixes-5.10-rc1 

This kselftest fixes update consists of a selftests harness fix to
 flush stdout before forking to avoid parent and child printing
 duplicates messages. This is evident when test output is redirected
 to a file.
 
 The second fix is a tools/ wide change to avoid comma separated statements
 from Joe Perches. This fix spans tools/lib, tools/power/cpupower, and
 selftests.
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Merge tag 'linux-kselftest-fixes-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull kselftest updates from Shuah Khan:

 - a selftests harness fix to flush stdout before forking to avoid
   parent and child printing duplicates messages. This is evident when
   test output is redirected to a file.

 - a tools/ wide change to avoid comma separated statements from Joe
   Perches. This fix spans tools/lib, tools/power/cpupower, and
   selftests.

* tag 'linux-kselftest-fixes-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  tools: Avoid comma separated statements
  selftests/harness: Flush stdout before forking
This commit is contained in:
Linus Torvalds 2020-10-14 14:23:51 -07:00
Родитель 2fc61f25fb aa803771a8
Коммит 9e51183e94
5 изменённых файлов: 215 добавлений и 128 удалений
Показать статистику Скачать Patch файл Скачать Diff файл Показать все файлы Свернуть все файлы

10
tools/lib/subcmd/help.c
Просмотреть файл

@ -65,12 +65,14 @@ void exclude_cmds(struct cmdnames *cmds, struct cmdnames *excludes)
ci = cj = ei = 0;
while (ci < cmds->cnt && ei < excludes->cnt) {
cmp = strcmp(cmds->names[ci]->name, excludes->names[ei]->name);
if (cmp < 0)
if (cmp < 0) {
cmds->names[cj++] = cmds->names[ci++];
else if (cmp == 0)
ci++, ei++;
else if (cmp > 0)
} else if (cmp == 0) {
ci++;
ei++;
} else if (cmp > 0) {
ei++;
}
}
while (ci < cmds->cnt)

14
tools/power/cpupower/utils/cpufreq-set.c
Просмотреть файл

@ -99,13 +99,17 @@ static unsigned long string_to_frequency(const char *str)
continue;
if (str[cp] == '.') {
while (power > -1 && isdigit(str[cp+1]))
cp++, power--;
while (power > -1 && isdigit(str[cp+1])) {
cp++;
power--;
}
}
if (power >= -1) /* not enough => pad */
if (power >= -1) { /* not enough => pad */
pad = power + 1;
else /* to much => strip */
pad = 0, cp += power + 1;
} else { /* too much => strip */
pad = 0;
cp += power + 1;
}
/* check bounds */
if (cp <= 0 || cp + pad > NORM_FREQ_LEN - 1)
return 0;

5
tools/testing/selftests/kselftest_harness.h
Просмотреть файл

@ -971,6 +971,11 @@ void __run_test(struct __fixture_metadata *f,
ksft_print_msg(" RUN %s%s%s.%s ...\n",
f->name, variant->name[0] ? "." : "", variant->name, t->name);
/* Make sure output buffers are flushed before fork */
fflush(stdout);
fflush(stderr);
t->pid = fork();
if (t->pid < 0) {
ksft_print_msg("ERROR SPAWNING TEST CHILD\n");

18
tools/testing/selftests/vm/gup_benchmark.c
Просмотреть файл

@ -105,12 +105,16 @@ int main(int argc, char **argv)
gup.flags |= FOLL_WRITE;
fd = open("/sys/kernel/debug/gup_benchmark", O_RDWR);
if (fd == -1)
perror("open"), exit(1);
if (fd == -1) {
perror("open");
exit(1);
}
p = mmap(NULL, size, PROT_READ | PROT_WRITE, flags, filed, 0);
if (p == MAP_FAILED)
perror("mmap"), exit(1);
if (p == MAP_FAILED) {
perror("mmap");
exit(1);
}
gup.addr = (unsigned long)p;
if (thp == 1)
@ -123,8 +127,10 @@ int main(int argc, char **argv)
for (i = 0; i < repeats; i++) {
gup.size = size;
if (ioctl(fd, cmd, &gup))
perror("ioctl"), exit(1);
if (ioctl(fd, cmd, &gup)) {
perror("ioctl");
exit(1);
}
printf("Time: get:%lld put:%lld us", gup.get_delta_usec,
gup.put_delta_usec);

296
tools/testing/selftests/vm/userfaultfd.c
Просмотреть файл

@ -227,8 +227,10 @@ static void hugetlb_allocate_area(void **alloc_area)
huge_fd, *alloc_area == area_src ? 0 :
nr_pages * page_size);
if (area_alias == MAP_FAILED) {
if (munmap(*alloc_area, nr_pages * page_size) < 0)
perror("hugetlb munmap"), exit(1);
if (munmap(*alloc_area, nr_pages * page_size) < 0) {
perror("hugetlb munmap");
exit(1);
}
*alloc_area = NULL;
return;
}
@ -337,9 +339,10 @@ static void wp_range(int ufd, __u64 start, __u64 len, bool wp)
/* Undo write-protect, do wakeup after that */
prms.mode = wp ? UFFDIO_WRITEPROTECT_MODE_WP : 0;
if (ioctl(ufd, UFFDIO_WRITEPROTECT, &prms))
fprintf(stderr, "clear WP failed for address 0x%Lx\n",
start), exit(1);
if (ioctl(ufd, UFFDIO_WRITEPROTECT, &prms)) {
fprintf(stderr, "clear WP failed for address 0x%Lx\n", start);
exit(1);
}
}
static void *locking_thread(void *arg)
@ -359,8 +362,10 @@ static void *locking_thread(void *arg)
seed += cpu;
bzero(&rand, sizeof(rand));
bzero(&randstate, sizeof(randstate));
if (initstate_r(seed, randstate, sizeof(randstate), &rand))
fprintf(stderr, "srandom_r error\n"), exit(1);
if (initstate_r(seed, randstate, sizeof(randstate), &rand)) {
fprintf(stderr, "srandom_r error\n");
exit(1);
}
} else {
page_nr = -bounces;
if (!(bounces & BOUNCE_RACINGFAULTS))
@ -369,12 +374,16 @@ static void *locking_thread(void *arg)
while (!finished) {
if (bounces & BOUNCE_RANDOM) {
if (random_r(&rand, &rand_nr))
fprintf(stderr, "random_r 1 error\n"), exit(1);
if (random_r(&rand, &rand_nr)) {
fprintf(stderr, "random_r 1 error\n");
exit(1);
}
page_nr = rand_nr;
if (sizeof(page_nr) > sizeof(rand_nr)) {
if (random_r(&rand, &rand_nr))
fprintf(stderr, "random_r 2 error\n"), exit(1);
if (random_r(&rand, &rand_nr)) {
fprintf(stderr, "random_r 2 error\n");
exit(1);
}
page_nr |= (((unsigned long) rand_nr) << 16) <<
16;
}
@ -385,11 +394,13 @@ static void *locking_thread(void *arg)
start = time(NULL);
if (bounces & BOUNCE_VERIFY) {
count = *area_count(area_dst, page_nr);
if (!count)
if (!count) {
fprintf(stderr,
"page_nr %lu wrong count %Lu %Lu\n",
page_nr, count,
count_verify[page_nr]), exit(1);
count_verify[page_nr]);
exit(1);
}
/*
@ -401,11 +412,12 @@ static void *locking_thread(void *arg)
*/
#if 1
if (!my_bcmp(area_dst + page_nr * page_size, zeropage,
page_size))
page_size)) {
fprintf(stderr,
"my_bcmp page_nr %lu wrong count %Lu %Lu\n",
page_nr, count,
count_verify[page_nr]), exit(1);
page_nr, count, count_verify[page_nr]);
exit(1);
}
#else
unsigned long loops;
@ -437,7 +449,7 @@ static void *locking_thread(void *arg)
fprintf(stderr,
"page_nr %lu memory corruption %Lu %Lu\n",
page_nr, count,
count_verify[page_nr]), exit(1);
count_verify[page_nr]); exit(1);
}
count++;
*area_count(area_dst, page_nr) = count_verify[page_nr] = count;
@ -461,12 +473,14 @@ static void retry_copy_page(int ufd, struct uffdio_copy *uffdio_copy,
offset);
if (ioctl(ufd, UFFDIO_COPY, uffdio_copy)) {
/* real retval in ufdio_copy.copy */
if (uffdio_copy->copy != -EEXIST)
if (uffdio_copy->copy != -EEXIST) {
fprintf(stderr, "UFFDIO_COPY retry error %Ld\n",
uffdio_copy->copy), exit(1);
uffdio_copy->copy);
exit(1);
}
} else {
fprintf(stderr, "UFFDIO_COPY retry unexpected %Ld\n",
uffdio_copy->copy), exit(1);
uffdio_copy->copy); exit(1);
}
}
@ -474,9 +488,10 @@ static int __copy_page(int ufd, unsigned long offset, bool retry)
{
struct uffdio_copy uffdio_copy;
if (offset >= nr_pages * page_size)
fprintf(stderr, "unexpected offset %lu\n",
offset), exit(1);
if (offset >= nr_pages * page_size) {
fprintf(stderr, "unexpected offset %lu\n", offset);
exit(1);
}
uffdio_copy.dst = (unsigned long) area_dst + offset;
uffdio_copy.src = (unsigned long) area_src + offset;
uffdio_copy.len = page_size;
@ -487,12 +502,14 @@ static int __copy_page(int ufd, unsigned long offset, bool retry)
uffdio_copy.copy = 0;
if (ioctl(ufd, UFFDIO_COPY, &uffdio_copy)) {
/* real retval in ufdio_copy.copy */
if (uffdio_copy.copy != -EEXIST)
if (uffdio_copy.copy != -EEXIST) {
fprintf(stderr, "UFFDIO_COPY error %Ld\n",
uffdio_copy.copy), exit(1);
uffdio_copy.copy);
exit(1);
}
} else if (uffdio_copy.copy != page_size) {
fprintf(stderr, "UFFDIO_COPY unexpected copy %Ld\n",
uffdio_copy.copy), exit(1);
uffdio_copy.copy); exit(1);
} else {
if (test_uffdio_copy_eexist && retry) {
test_uffdio_copy_eexist = false;
@ -521,11 +538,11 @@ static int uffd_read_msg(int ufd, struct uffd_msg *msg)
if (ret < 0) {
if (errno == EAGAIN)
return 1;
else
perror("blocking read error"), exit(1);
perror("blocking read error");
} else {
fprintf(stderr, "short read\n"), exit(1);
fprintf(stderr, "short read\n");
}
exit(1);
}
return 0;
@ -536,9 +553,10 @@ static void uffd_handle_page_fault(struct uffd_msg *msg,
{
unsigned long offset;
if (msg->event != UFFD_EVENT_PAGEFAULT)
fprintf(stderr, "unexpected msg event %u\n",
msg->event), exit(1);
if (msg->event != UFFD_EVENT_PAGEFAULT) {
fprintf(stderr, "unexpected msg event %u\n", msg->event);
exit(1);
}
if (msg->arg.pagefault.flags & UFFD_PAGEFAULT_FLAG_WP) {
wp_range(uffd, msg->arg.pagefault.address, page_size, false);
@ -546,8 +564,10 @@ static void uffd_handle_page_fault(struct uffd_msg *msg,
} else {
/* Missing page faults */
if (bounces & BOUNCE_VERIFY &&
msg->arg.pagefault.flags & UFFD_PAGEFAULT_FLAG_WRITE)
fprintf(stderr, "unexpected write fault\n"), exit(1);
msg->arg.pagefault.flags & UFFD_PAGEFAULT_FLAG_WRITE) {
fprintf(stderr, "unexpected write fault\n");
exit(1);
}
offset = (char *)(unsigned long)msg->arg.pagefault.address - area_dst;
offset &= ~(page_size-1);
@ -574,25 +594,32 @@ static void *uffd_poll_thread(void *arg)
for (;;) {
ret = poll(pollfd, 2, -1);
if (!ret)
fprintf(stderr, "poll error %d\n", ret), exit(1);
if (ret < 0)
perror("poll"), exit(1);
if (!ret) {
fprintf(stderr, "poll error %d\n", ret);
exit(1);
}
if (ret < 0) {
perror("poll");
exit(1);
}
if (pollfd[1].revents & POLLIN) {
if (read(pollfd[1].fd, &tmp_chr, 1) != 1)
fprintf(stderr, "read pipefd error\n"),
exit(1);
if (read(pollfd[1].fd, &tmp_chr, 1) != 1) {
fprintf(stderr, "read pipefd error\n");
exit(1);
}
break;
}
if (!(pollfd[0].revents & POLLIN))
if (!(pollfd[0].revents & POLLIN)) {
fprintf(stderr, "pollfd[0].revents %d\n",
pollfd[0].revents), exit(1);
pollfd[0].revents);
exit(1);
}
if (uffd_read_msg(uffd, &msg))
continue;
switch (msg.event) {
default:
fprintf(stderr, "unexpected msg event %u\n",
msg.event), exit(1);
msg.event); exit(1);
break;
case UFFD_EVENT_PAGEFAULT:
uffd_handle_page_fault(&msg, stats);
@ -606,8 +633,10 @@ static void *uffd_poll_thread(void *arg)
uffd_reg.range.start = msg.arg.remove.start;
uffd_reg.range.len = msg.arg.remove.end -
msg.arg.remove.start;
if (ioctl(uffd, UFFDIO_UNREGISTER, &uffd_reg.range))
fprintf(stderr, "remove failure\n"), exit(1);
if (ioctl(uffd, UFFDIO_UNREGISTER, &uffd_reg.range)) {
fprintf(stderr, "remove failure\n");
exit(1);
}
break;
case UFFD_EVENT_REMAP:
area_dst = (char *)(unsigned long)msg.arg.remap.to;
@ -879,8 +908,10 @@ static int faulting_process(int signal_test)
area_dst = mremap(area_dst, nr_pages * page_size, nr_pages * page_size,
MREMAP_MAYMOVE | MREMAP_FIXED, area_src);
if (area_dst == MAP_FAILED)
perror("mremap"), exit(1);
if (area_dst == MAP_FAILED) {
perror("mremap");
exit(1);
}
for (; nr < nr_pages; nr++) {
count = *area_count(area_dst, nr);
@ -888,7 +919,7 @@ static int faulting_process(int signal_test)
fprintf(stderr,
"nr %lu memory corruption %Lu %Lu\n",
nr, count,
count_verify[nr]), exit(1);
count_verify[nr]); exit(1);
}
/*
* Trigger write protection if there is by writting
@ -901,8 +932,10 @@ static int faulting_process(int signal_test)
return 1;
for (nr = 0; nr < nr_pages; nr++) {
if (my_bcmp(area_dst + nr * page_size, zeropage, page_size))
fprintf(stderr, "nr %lu is not zero\n", nr), exit(1);
if (my_bcmp(area_dst + nr * page_size, zeropage, page_size)) {
fprintf(stderr, "nr %lu is not zero\n", nr);
exit(1);
}
}
return 0;
@ -916,12 +949,14 @@ static void retry_uffdio_zeropage(int ufd,
uffdio_zeropage->range.len,
offset);
if (ioctl(ufd, UFFDIO_ZEROPAGE, uffdio_zeropage)) {
if (uffdio_zeropage->zeropage != -EEXIST)
if (uffdio_zeropage->zeropage != -EEXIST) {
fprintf(stderr, "UFFDIO_ZEROPAGE retry error %Ld\n",
uffdio_zeropage->zeropage), exit(1);
uffdio_zeropage->zeropage);
exit(1);
}
} else {
fprintf(stderr, "UFFDIO_ZEROPAGE retry unexpected %Ld\n",
uffdio_zeropage->zeropage), exit(1);
uffdio_zeropage->zeropage); exit(1);
}
}
@ -933,9 +968,10 @@ static int __uffdio_zeropage(int ufd, unsigned long offset, bool retry)
has_zeropage = uffd_test_ops->expected_ioctls & (1 << _UFFDIO_ZEROPAGE);
if (offset >= nr_pages * page_size)
fprintf(stderr, "unexpected offset %lu\n",
offset), exit(1);
if (offset >= nr_pages * page_size) {
fprintf(stderr, "unexpected offset %lu\n", offset);
exit(1);
}
uffdio_zeropage.range.start = (unsigned long) area_dst + offset;
uffdio_zeropage.range.len = page_size;
uffdio_zeropage.mode = 0;
@ -943,22 +979,26 @@ static int __uffdio_zeropage(int ufd, unsigned long offset, bool retry)
if (ret) {
/* real retval in ufdio_zeropage.zeropage */
if (has_zeropage) {
if (uffdio_zeropage.zeropage == -EEXIST)
fprintf(stderr, "UFFDIO_ZEROPAGE -EEXIST\n"),
exit(1);
else
if (uffdio_zeropage.zeropage == -EEXIST) {
fprintf(stderr, "UFFDIO_ZEROPAGE -EEXIST\n");
exit(1);
} else {
fprintf(stderr, "UFFDIO_ZEROPAGE error %Ld\n",
uffdio_zeropage.zeropage), exit(1);
uffdio_zeropage.zeropage);
exit(1);
}
} else {
if (uffdio_zeropage.zeropage != -EINVAL)
if (uffdio_zeropage.zeropage != -EINVAL) {
fprintf(stderr,
"UFFDIO_ZEROPAGE not -EINVAL %Ld\n",
uffdio_zeropage.zeropage), exit(1);
uffdio_zeropage.zeropage);
exit(1);
}
}
} else if (has_zeropage) {
if (uffdio_zeropage.zeropage != page_size) {
fprintf(stderr, "UFFDIO_ZEROPAGE unexpected %Ld\n",
uffdio_zeropage.zeropage), exit(1);
uffdio_zeropage.zeropage); exit(1);
} else {
if (test_uffdio_zeropage_eexist && retry) {
test_uffdio_zeropage_eexist = false;
@ -970,7 +1010,7 @@ static int __uffdio_zeropage(int ufd, unsigned long offset, bool retry)
} else {
fprintf(stderr,
"UFFDIO_ZEROPAGE succeeded %Ld\n",
uffdio_zeropage.zeropage), exit(1);
uffdio_zeropage.zeropage); exit(1);
}
return 0;
@ -1000,19 +1040,24 @@ static int userfaultfd_zeropage_test(void)
uffdio_register.mode = UFFDIO_REGISTER_MODE_MISSING;
if (test_uffdio_wp)
uffdio_register.mode |= UFFDIO_REGISTER_MODE_WP;
if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register))
fprintf(stderr, "register failure\n"), exit(1);
if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register)) {
fprintf(stderr, "register failure\n");
exit(1);
}
expected_ioctls = uffd_test_ops->expected_ioctls;
if ((uffdio_register.ioctls & expected_ioctls) !=
expected_ioctls)
expected_ioctls) {
fprintf(stderr,
"unexpected missing ioctl for anon memory\n"),
exit(1);
"unexpected missing ioctl for anon memory\n");
exit(1);
}
if (uffdio_zeropage(uffd, 0)) {
if (my_bcmp(area_dst, zeropage, page_size))
fprintf(stderr, "zeropage is not zero\n"), exit(1);
if (my_bcmp(area_dst, zeropage, page_size)) {
fprintf(stderr, "zeropage is not zero\n");
exit(1);
}
}
close(uffd);
@ -1047,32 +1092,41 @@ static int userfaultfd_events_test(void)
uffdio_register.mode = UFFDIO_REGISTER_MODE_MISSING;
if (test_uffdio_wp)
uffdio_register.mode |= UFFDIO_REGISTER_MODE_WP;
if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register))
fprintf(stderr, "register failure\n"), exit(1);
if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register)) {
fprintf(stderr, "register failure\n");
exit(1);
}
expected_ioctls = uffd_test_ops->expected_ioctls;
if ((uffdio_register.ioctls & expected_ioctls) !=
expected_ioctls)
fprintf(stderr,
"unexpected missing ioctl for anon memory\n"),
exit(1);
if ((uffdio_register.ioctls & expected_ioctls) != expected_ioctls) {
fprintf(stderr, "unexpected missing ioctl for anon memory\n");
exit(1);
}
if (pthread_create(&uffd_mon, &attr, uffd_poll_thread, &stats))
perror("uffd_poll_thread create"), exit(1);
if (pthread_create(&uffd_mon, &attr, uffd_poll_thread, &stats)) {
perror("uffd_poll_thread create");
exit(1);
}
pid = fork();
if (pid < 0)
perror("fork"), exit(1);
if (pid < 0) {
perror("fork");
exit(1);
}
if (!pid)
return faulting_process(0);
waitpid(pid, &err, 0);
if (err)
fprintf(stderr, "faulting process failed\n"), exit(1);
if (err) {
fprintf(stderr, "faulting process failed\n");
exit(1);
}
if (write(pipefd[1], &c, sizeof(c)) != sizeof(c))
perror("pipe write"), exit(1);
if (write(pipefd[1], &c, sizeof(c)) != sizeof(c)) {
perror("pipe write");
exit(1);
}
if (pthread_join(uffd_mon, NULL))
return 1;
@ -1110,38 +1164,49 @@ static int userfaultfd_sig_test(void)
uffdio_register.mode = UFFDIO_REGISTER_MODE_MISSING;
if (test_uffdio_wp)
uffdio_register.mode |= UFFDIO_REGISTER_MODE_WP;
if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register))
fprintf(stderr, "register failure\n"), exit(1);
if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register)) {
fprintf(stderr, "register failure\n");
exit(1);
}
expected_ioctls = uffd_test_ops->expected_ioctls;
if ((uffdio_register.ioctls & expected_ioctls) !=
expected_ioctls)
fprintf(stderr,
"unexpected missing ioctl for anon memory\n"),
exit(1);
if ((uffdio_register.ioctls & expected_ioctls) != expected_ioctls) {
fprintf(stderr, "unexpected missing ioctl for anon memory\n");
exit(1);
}
if (faulting_process(1))
fprintf(stderr, "faulting process failed\n"), exit(1);
if (faulting_process(1)) {
fprintf(stderr, "faulting process failed\n");
exit(1);
}
if (uffd_test_ops->release_pages(area_dst))
return 1;
if (pthread_create(&uffd_mon, &attr, uffd_poll_thread, &stats))
perror("uffd_poll_thread create"), exit(1);
if (pthread_create(&uffd_mon, &attr, uffd_poll_thread, &stats)) {
perror("uffd_poll_thread create");
exit(1);
}
pid = fork();
if (pid < 0)
perror("fork"), exit(1);
if (pid < 0) {
perror("fork");
exit(1);
}
if (!pid)
exit(faulting_process(2));
waitpid(pid, &err, 0);
if (err)
fprintf(stderr, "faulting process failed\n"), exit(1);
if (err) {
fprintf(stderr, "faulting process failed\n");
exit(1);
}
if (write(pipefd[1], &c, sizeof(c)) != sizeof(c))
perror("pipe write"), exit(1);
if (write(pipefd[1], &c, sizeof(c)) != sizeof(c)) {
perror("pipe write");
exit(1);
}
if (pthread_join(uffd_mon, (void **)&userfaults))
return 1;
@ -1395,7 +1460,7 @@ static void set_test_type(const char *type)
test_type = TEST_SHMEM;
uffd_test_ops = &shmem_uffd_test_ops;
} else {
fprintf(stderr, "Unknown test type: %s\n", type), exit(1);
fprintf(stderr, "Unknown test type: %s\n", type); exit(1);
}
if (test_type == TEST_HUGETLB)
@ -1403,12 +1468,15 @@ static void set_test_type(const char *type)
else
page_size = sysconf(_SC_PAGE_SIZE);
if (!page_size)
fprintf(stderr, "Unable to determine page size\n"),
exit(2);
if (!page_size) {
fprintf(stderr, "Unable to determine page size\n");
exit(2);
}
if ((unsigned long) area_count(NULL, 0) + sizeof(unsigned long long) * 2
> page_size)
fprintf(stderr, "Impossible to run this test\n"), exit(2);
> page_size) {
fprintf(stderr, "Impossible to run this test\n");
exit(2);
}
}
static void sigalrm(int sig)
@ -1425,8 +1493,10 @@ int main(int argc, char **argv)
if (argc < 4)
usage();
if (signal(SIGALRM, sigalrm) == SIG_ERR)
fprintf(stderr, "failed to arm SIGALRM"), exit(1);
if (signal(SIGALRM, sigalrm) == SIG_ERR) {
fprintf(stderr, "failed to arm SIGALRM");
exit(1);
}
alarm(ALARM_INTERVAL_SECS);
set_test_type(argv[1]);