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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
99 lines
4.7 KiB
C
99 lines
4.7 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/calls/blockcancel.internal.h"
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#include "libc/calls/calls.h"
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#include "libc/calls/struct/rusage.h"
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#include "libc/calls/struct/sigaction.h"
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#include "libc/dce.h"
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#include "libc/errno.h"
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#include "libc/intrin/weaken.h"
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#include "libc/log/log.h"
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#include "libc/paths.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/ok.h"
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#include "libc/sysv/consts/sig.h"
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#include "libc/thread/thread.h"
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/**
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* Launches program with system command interpreter.
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*
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* This implementation embeds the Cosmopolitan Command Interpreter which
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* provides Bourne-like syntax on all platforms, including Windows. Many
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* builtin commands are included, e.g. exit, cd, rm, [, cat, wait, exec,
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* env, echo, read, true, test, kill, touch, rmdir, mkdir, false, mktemp
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* and usleep. It's also possible to __static_yoink() the symbols `_tr`,
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* `_sed`, `_awk`, and `_curl` for the tr, sed, awk and curl commands if
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* you're using the Cosmopolitan mono-repo.
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*
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* If you just have a program name and arguments, and you don't need the
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* full power of a UNIX-like shell, then consider using the Cosmopolitan
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* provided API systemvpe() instead. It provides a safer alternative for
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* variable arguments than shell script escaping. It lets you clean your
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* environment variables, for even more safety. Finally it's 10x faster.
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*
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* It's important to check the returned status code. For example, if you
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* press CTRL-C while running your program you'll expect it to terminate
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* however that won't be the case if the SIGINT gets raised while inside
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* the system() function. If the child process doesn't handle the signal
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* then this will return e.g. WIFSIGNALED(ws) && WTERMSIG(ws) == SIGINT.
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*
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* @param cmdline is a unix shell script
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* @return -1 if child process couldn't be created, otherwise a wait
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* status that can be accessed using macros like WEXITSTATUS(s),
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* WIFSIGNALED(s), WTERMSIG(s), etc.
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* @see systemve()
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* @threadsafe
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*/
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int system(const char *cmdline) {
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int pid, wstatus;
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sigset_t chldmask, savemask;
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if (!cmdline)
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return 1;
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sigemptyset(&chldmask);
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sigaddset(&chldmask, SIGINT);
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sigaddset(&chldmask, SIGQUIT);
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sigaddset(&chldmask, SIGCHLD);
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sigprocmask(SIG_BLOCK, &chldmask, &savemask);
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if (!(pid = fork())) {
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sigprocmask(SIG_SETMASK, &savemask, 0);
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_Exit(_cocmd(3, (char *[]){"system", "-c", (char *)cmdline, 0}, environ));
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} else if (pid == -1) {
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wstatus = -1;
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} else {
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struct sigaction ignore, saveint, savequit;
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ignore.sa_flags = 0;
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ignore.sa_handler = SIG_IGN;
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sigemptyset(&ignore.sa_mask);
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sigaction(SIGINT, &ignore, &saveint);
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sigaction(SIGQUIT, &ignore, &savequit);
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BLOCK_CANCELATION;
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while (wait4(pid, &wstatus, 0, 0) == -1) {
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if (errno != EINTR) {
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wstatus = -1;
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break;
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}
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}
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ALLOW_CANCELATION;
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sigaction(SIGQUIT, &savequit, 0);
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sigaction(SIGINT, &saveint, 0);
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}
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sigprocmask(SIG_SETMASK, &savemask, 0);
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return wstatus;
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}
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