/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-â
âvi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :viâ
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â Copyright 2022 Justine Alexandra Roberts Tunney                              â
â                                                                              â
â Permission to use, copy, modify, and/or distribute this software for         â
â any purpose with or without fee is hereby granted, provided that the         â
â above copyright notice and this permission notice appear in all copies.      â
â                                                                              â
â THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                â
â WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                â
â WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             â
â AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         â
â DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        â
â PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               â
â TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             â
â PERFORMANCE OF THIS SOFTWARE.                                                â
ââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââ*/
#include "libc/calls/calls.h"
#include "libc/calls/internal.h"
#include "libc/calls/state.internal.h"
#include "libc/calls/struct/itimerval.h"
#include "libc/calls/struct/rlimit.h"
#include "libc/calls/struct/sigaction.h"
#include "libc/errno.h"
#include "libc/macros.internal.h"
#include "libc/runtime/internal.h"
#include "libc/runtime/stack.h"
#include "libc/stdio/rand.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/clone.h"
#include "libc/sysv/consts/itimer.h"
#include "libc/sysv/consts/map.h"
#include "libc/sysv/consts/o.h"
#include "libc/sysv/consts/prot.h"
#include "libc/sysv/consts/rlimit.h"
#include "libc/sysv/consts/sa.h"
#include "libc/sysv/consts/sig.h"
#include "libc/testlib/hyperion.h"
#include "libc/testlib/testlib.h"
#include "libc/thread/spawn.h"
#include "libc/thread/tls.h"
#include "libc/thread/wait0.internal.h"
#include "libc/time/struct/tm.h"
#include "libc/time/time.h"

STATIC_YOINK("zip_uri_support");
STATIC_YOINK("libc/testlib/hyperion.txt");

#define THREADS 8

void SetUpOnce(void) {
  __enable_threads();
  ASSERT_SYS(0, 0, pledge("stdio rpath", 0));
}

void PullSomeZipFilesIntoLinkage(void) {
  gmtime(0);
}

TEST(reservefd, testGrowthOfFdsDataStructure) {
  int i, n;
  struct rlimit rlim;
  n = 1700;  // pe '2**16/40' â 1638 (likely value of g_fds.n)
  if (!getrlimit(RLIMIT_NOFILE, &rlim)) n = MIN(n, rlim.rlim_cur - 3);
  for (i = 0; i < n; ++i) {
    EXPECT_SYS(0, i + 3, open("/zip/usr/share/zoneinfo/UTC", O_RDONLY));
  }
  ASSERT_GT(g_fds.n, OPEN_MAX);
  for (i = 0; i < n; ++i) {
    EXPECT_SYS(0, 0, close(i + 3));
  }
}

void OnSigAlrm(int sig, siginfo_t *si, void *ctx) {
  int rc, fd;
  char buf[64];
  ASSERT_NE(-1, (fd = open("/zip/libc/testlib/hyperion.txt", O_RDONLY)));
  for (;;) {
    rc = read(fd, buf, 64);
    if (rc != -1) {
      ASSERT_EQ(64, rc);
      break;
    } else {
      ASSERT_EQ(EINTR, errno);
      errno = 0;
    }
  }
  ASSERT_EQ(0, memcmp(kHyperion, buf, 64));
  close(fd);  // can eintr which doesn't matter
}

int Worker(void *p, int tid) {
  char buf[64];
  int i, rc, fd;
  for (i = 0; i < 64; ++i) {
    ASSERT_NE(-1, (fd = open("/zip/libc/testlib/hyperion.txt", O_RDONLY)));
    usleep(_rand64() % 100);
    for (;;) {
      rc = read(fd, buf, 64);
      if (rc != -1) {
        ASSERT_EQ(64, rc);
        break;
      } else {
        ASSERT_EQ(EINTR, errno);
        errno = 0;
      }
    }
    ASSERT_EQ(0, memcmp(kHyperion, buf, 64));
    close(fd);
  }
  return 0;
}

TEST(reservefd, tortureTest) {
  int i;
  struct spawn th[THREADS];
  struct sigaction oldsa;
  struct itimerval oldit;
  struct itimerval it = {{0, 10000}, {0, 100}};
  struct sigaction sa = {.sa_sigaction = OnSigAlrm,
                         .sa_flags = 0 /* SA_NODEFER */};
  // ASSERT_SYS(0, 0, sigaction(SIGALRM, &sa, &oldsa));
  // ASSERT_SYS(0, 0, setitimer(ITIMER_REAL, &it, &oldit));
  for (i = 0; i < THREADS; ++i) _spawn(Worker, 0, th + i);
  for (i = 0; i < THREADS; ++i) _join(th + i);
  // EXPECT_SYS(0, 0, sigaction(SIGALRM, &oldsa, 0));
  // EXPECT_SYS(0, 0, setitimer(ITIMER_REAL, &oldit, 0));
}
