/*-*- 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 2020 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/struct/rlimit.internal.h"
#include "libc/dce.h"
#include "libc/intrin/asan.internal.h"
#include "libc/intrin/describeflags.internal.h"
#include "libc/intrin/strace.internal.h"
#include "libc/sysv/consts/rlimit.h"
#include "libc/sysv/errfuns.h"

/**
 * Gets resource limit for current process.
 *
 * @param resource can be RLIMIT_{CPU,FSIZE,DATA,STACK,CORE,RSS,etc.}
 * @param rlim receives result, modified only on success
 * @return 0 on success or -1 w/ errno
 * @see libc/sysv/consts.sh
 */
int getrlimit(int resource, struct rlimit *rlim) {
  int rc;
  if (resource == 127) {
    rc = einval();
  } else if (!rlim || (IsAsan() && !__asan_is_valid(rlim, sizeof(*rlim)))) {
    rc = efault();
  } else if (!IsWindows()) {
    rc = sys_getrlimit(resource, rlim);
  } else if (resource == RLIMIT_AS) {
    rlim->rlim_cur = __virtualmax;
    rlim->rlim_max = __virtualmax;
    rc = 0;
  } else {
    rc = einval();
  }
  STRACE("getrlimit(%s, [%s]) â %d% m", DescribeRlimitName(resource),
         DescribeRlimit(rc, rlim), rc);
  return rc;
}
