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Greatly expand system() shell code features

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The cosmopolitan command interpreter now has 13 builtin commands,
variable support, support for ; / && / || syntax, asynchronous support,
and plenty of unit tests with bug fixes.

This change fixes a bug in posix_spawn() with null envp arg. strace
logging now uses atomic writes for scatter functions. Breaking change
renaming GetCpuCount() to _getcpucount(). TurfWar is now updated to use
the new token bucket algorithm. WIN32 affinity masks now inherit across
fork() and execve().
This commit is contained in:
Justine Tunney 2022-10-11 21:06:27 -07:00
parent e7329b7cba
commit b41f91c658
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GPG key ID: BE714B4575D6E328
80 changed files with 1370 additions and 344 deletions
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68
libc/intrin/describeiovec.c Normal file
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/*-*- 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 2021 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/calls/struct/iovec.h"
#include "libc/calls/struct/iovec.internal.h"
#include "libc/dce.h"
#include "libc/intrin/asan.internal.h"
#include "libc/intrin/kprintf.h"
#include "libc/limits.h"
#include "libc/macros.internal.h"
#define N 300
#define append(...) o += ksnprintf(buf + o, N - o, __VA_ARGS__)
const char *(DescribeIovec)(char buf[N], ssize_t rc, const struct iovec *iov,
int iovlen) {
const char *d;
int i, j, o = 0;
if (!iov) return "NULL";
if (rc == -1) return "n/a";
if (rc == -2) rc = SSIZE_MAX;
if ((!IsAsan() && kisdangerous(iov)) ||
(IsAsan() && !__asan_is_valid(iov, sizeof(*iov) * iovlen))) {
ksnprintf(buf, N, "%p", iov);
return buf;
}
append("{");
for (i = 0; rc && i < iovlen; ++i) {
if (iov[i].iov_len < rc) {
j = iov[i].iov_len;
rc -= iov[i].iov_len;
} else {
j = rc;
rc = 0;
}
if (j > 40) {
j = 40;
d = "...";
} else {
d = "";
}
append("%s{%#.*hhs%s, %'zu}", i ? ", " : "", j, iov[i].iov_base, d,
iov[i].iov_len);
}
append("%s}", iovlen > 2 ? ", ..." : "");
return buf;
}