mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-01 03:53:33 +00:00
4f98ad1054
- Improve i/o perf on New Technology - Code cleanup on read() for New Technology - Fix bad bug with dup() of socket on New Technology - Clean up some more strace errors on New Technology
76 lines
3.5 KiB
C
76 lines
3.5 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/bits/weaken.h"
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#include "libc/calls/calls.h"
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#include "libc/calls/internal.h"
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#include "libc/calls/strace.internal.h"
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#include "libc/dce.h"
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#include "libc/errno.h"
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#include "libc/fmt/itoa.h"
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#include "libc/intrin/asan.internal.h"
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#include "libc/intrin/kprintf.h"
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#include "libc/log/log.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/at.h"
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#include "libc/sysv/errfuns.h"
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#include "libc/zipos/zipos.internal.h"
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static inline const char *__strace_fstatat_flags(int flags) {
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static char buf[12];
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if (flags == AT_SYMLINK_NOFOLLOW) return "AT_SYMLINK_NOFOLLOW";
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FormatInt32(buf, flags);
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return buf;
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}
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/**
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* Returns information about thing.
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*
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* @param dirfd is normally AT_FDCWD but if it's an open directory and
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* file is a relative path, then file becomes relative to dirfd
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* @param st is where result is stored
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* @param flags can have AT_SYMLINK_NOFOLLOW
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* @return 0 on success, or -1 w/ errno
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* @see S_ISDIR(st.st_mode), S_ISREG()
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* @asyncsignalsafe
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* @vforksafe
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*/
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int fstatat(int dirfd, const char *path, struct stat *st, int flags) {
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/* execve() depends on this */
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int rc;
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char buf[12];
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struct ZiposUri zipname;
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if (__isfdkind(dirfd, kFdZip)) {
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STRACE("zipos dirfd not supported yet");
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rc = einval();
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} else if (weaken(__zipos_stat) &&
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weaken(__zipos_parseuri)(path, &zipname) != -1) {
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if (!__vforked) {
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rc = weaken(__zipos_stat)(&zipname, st);
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} else {
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rc = enotsup();
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}
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} else if (!IsWindows()) {
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rc = sys_fstatat(dirfd, path, st, flags);
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} else {
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rc = sys_fstatat_nt(dirfd, path, st, flags);
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}
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STRACE("fstatat(%s, %#s, [%s], %s) → %d% m", __strace_dirfd(buf, dirfd), path,
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__strace_stat(rc, st), __strace_fstatat_flags(flags), rc);
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return rc;
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}
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