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https://github.com/jart/cosmopolitan.git
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6e6fc38935
Commit bc6c183 introduced a bunch of discrepancies between what files
look like in the repo and what clang-format says they should look like.
However, there were already a few discrepancies prior to that. Most of
these discrepancies seemed to be unintentional, but a few of them were
load-bearing (e.g., a #include that violated header ordering needing
something to have been #defined by a 'later' #include.)
I opted to take what I hope is a relatively smooth-brained approach: I
reverted the .clang-format change, ran clang-format on the whole repo,
reapplied the .clang-format change, reran clang-format again, and then
reverted the commit that contained the first run. Thus the full effect
of this PR should only be to apply the changed formatting rules to the
repo, and from skimming the results, this seems to be the case.
My work can be checked by applying the short, manual commits, and then
rerunning the command listed in the autogenerated commits (those whose
messages I have prefixed auto:) and seeing if your results agree.
It might be that the other diffs should be fixed at some point but I'm
leaving that aside for now.
fd '\.c(c|pp)?$' --print0| xargs -0 clang-format -i
98 lines
4.2 KiB
C
98 lines
4.2 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et 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/assert.h"
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#include "libc/calls/calls.h"
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#include "libc/dce.h"
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#include "libc/errno.h"
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#include "libc/limits.h"
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#include "libc/runtime/runtime.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/consts/o.h"
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#include "libc/temp.h"
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#define O_TMPFILE_LINUX 0x00410000
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int _mkstemp(char *, int);
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/**
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* Returns file descriptor of open anonymous file, e.g.
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*
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* int fd;
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* if ((fd = tmpfd()) == -1) {
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* perror("tmpfd");
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* exit(1);
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* }
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* // do stuff
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* close(f);
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*
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* This creates a secure temporary file inside $TMPDIR. If it isn't
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* defined, then /tmp is used on UNIX and GetTempPath() is used on the
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* New Technology. This resolution of $TMPDIR happens once in a ctor.
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*
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* Once close() is called, the returned file is guaranteed to be deleted
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* automatically. On UNIX the file is unlink()'d before this function
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* returns. On the New Technology it happens upon close().
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*
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* On newer Linux only (c. 2013) it's possible to turn the anonymous
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* returned file back into a real file, by doing this:
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*
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* linkat(AT_FDCWD, gc(xasprintf("/proc/self/fd/%d", fd)),
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* AT_FDCWD, "real.txt", AT_SYMLINK_FOLLOW)
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*
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* On the New Technology, temporary files created by this function
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* should have better performance, because `kNtFileAttributeTemporary`
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* asks the kernel to more aggressively cache and reduce i/o ops.
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*
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* The tmpfd() function should be favored over `open(O_TMPFILE)` because
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* the latter only works on Linux, and will cause open() failures on all
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* other platforms.
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*
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* @return file descriptor on success, or -1 w/ errno
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* @raise ECANCELED if thread was cancelled in masked mode
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* @raise EINTR if signal was delivered
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* @see mkstemp() if you need a path
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* @see tmpfile() for stdio version
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* @cancelationpoint
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* @asyncsignalsafe
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* @vforksafe
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*/
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int tmpfd(void) {
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int e, fd;
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const char *prog;
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char path[PATH_MAX + 1];
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if (IsLinux()) {
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e = errno;
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if ((fd = open(__get_tmpdir(), O_RDWR | O_TMPFILE_LINUX, 0600)) != -1) {
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return fd;
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} else {
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errno = e;
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}
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}
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path[0] = 0;
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strlcat(path, __get_tmpdir(), sizeof(path));
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if (!(prog = program_invocation_short_name))
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prog = "tmp";
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strlcat(path, prog, sizeof(path));
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strlcat(path, ".XXXXXX", sizeof(path));
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if ((fd = openatemp(AT_FDCWD, path, 0, O_UNLINK, 0)) == -1)
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return -1;
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return fd;
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}
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