mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-01 03:53:33 +00:00
49 lines
2.5 KiB
C
49 lines
2.5 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2023 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ Permission to use, copy, modify, and/or distribute this software for │
|
|
│ any purpose with or without fee is hereby granted, provided that the │
|
|
│ above copyright notice and this permission notice appear in all copies. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
|
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
|
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
|
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
|
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
|
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
|
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
|
│ PERFORMANCE OF THIS SOFTWARE. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/stdio/syscall.h"
|
|
#include "libc/calls/calls.h"
|
|
#include "libc/errno.h"
|
|
#include "libc/stdio/rand.h"
|
|
|
|
/**
|
|
* Translation layer for some Linux system calls:
|
|
*
|
|
* - `SYS_gettid`
|
|
* - `SYS_getrandom`
|
|
*
|
|
* @return negative errno on error
|
|
*/
|
|
long syscall(long number, ...) {
|
|
switch (number) {
|
|
default:
|
|
return -ENOSYS;
|
|
case SYS_gettid:
|
|
return gettid();
|
|
case SYS_getrandom: {
|
|
va_list va;
|
|
va_start(va, number);
|
|
void *buf = va_arg(va, void *);
|
|
size_t buflen = va_arg(va, size_t);
|
|
unsigned flags = va_arg(va, unsigned);
|
|
va_end(va);
|
|
ssize_t rc = getrandom(buf, buflen, flags);
|
|
return rc == -1 ? -errno : rc;
|
|
}
|
|
}
|
|
}
|