mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-01 03:53:33 +00:00
90 lines
3.8 KiB
C
90 lines
3.8 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/alg/reverse.h"
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#include "libc/calls/internal.h"
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#include "libc/nt/createfile.h"
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#include "libc/nt/enum/accessmask.h"
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#include "libc/nt/enum/creationdisposition.h"
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#include "libc/nt/enum/filesharemode.h"
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#include "libc/nt/ipc.h"
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#include "libc/nt/process.h"
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#include "libc/nt/runtime.h"
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#include "libc/sysv/consts/o.h"
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static const char kPipeNamePrefix[] = "\\\\?\\pipe\\cosmo\\";
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static size_t UintToChar16Array(char16_t *a, uint64_t i) {
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size_t j = 0;
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do {
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a[j++] = i % 10 + '0';
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i /= 10;
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} while (i > 0);
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a[j] = 0;
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reverse(a, j);
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return j;
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}
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static char16_t *CreatePipeName(char16_t *a) {
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static long x;
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unsigned i;
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for (i = 0; kPipeNamePrefix[i]; ++i) a[i] = kPipeNamePrefix[i];
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i += UintToChar16Array(a + i, GetCurrentProcessId());
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a[i++] = u'-';
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i += UintToChar16Array(a + i, GetCurrentProcessId());
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a[i++] = u'-';
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i += UintToChar16Array(a + i, x++);
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a[i] = u'\0';
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return a;
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}
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textwindows int sys_pipe_nt(int pipefd[2], unsigned flags) {
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int64_t hin, hout;
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int reader, writer;
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char16_t pipename[64];
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CreatePipeName(pipename);
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if ((reader = __reservefd()) == -1) return -1;
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if ((writer = __reservefd()) == -1) {
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__releasefd(reader);
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return -1;
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}
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if ((hin = CreateNamedPipe(pipename, kNtPipeAccessInbound,
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kNtPipeWait | kNtPipeReadmodeByte, 1, 65536, 65536,
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0, &kNtIsInheritable)) != -1) {
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if ((hout = CreateFile(pipename, kNtGenericWrite, kNtFileShareWrite,
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&kNtIsInheritable, kNtOpenExisting, 0, 0)) != -1) {
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g_fds.p[reader].kind = kFdFile;
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g_fds.p[reader].flags = flags;
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g_fds.p[reader].handle = hin;
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g_fds.p[writer].kind = kFdFile;
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g_fds.p[writer].flags = flags;
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g_fds.p[writer].handle = hout;
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pipefd[0] = reader;
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pipefd[1] = writer;
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return 0;
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} else {
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__winerr();
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CloseHandle(hin);
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}
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} else {
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__winerr();
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}
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__releasefd(writer);
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__releasefd(reader);
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return -1;
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}
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