mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
125 lines
5.3 KiB
C
125 lines
5.3 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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#define ShouldUseMsabiAttribute() 1
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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/ntspawn.h"
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#include "libc/calls/strace.internal.h"
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#include "libc/calls/syscall-nt.internal.h"
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#include "libc/intrin/weaken.h"
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#include "libc/mem/alloca.h"
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#include "libc/nt/accounting.h"
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#include "libc/nt/console.h"
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#include "libc/nt/enum/startf.h"
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#include "libc/nt/enum/status.h"
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#include "libc/nt/memory.h"
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#include "libc/nt/runtime.h"
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#include "libc/nt/struct/processinformation.h"
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#include "libc/nt/struct/startupinfo.h"
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#include "libc/nt/synchronization.h"
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#include "libc/nt/thunk/msabi.h"
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#include "libc/runtime/memtrack.internal.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/map.h"
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#include "libc/sysv/consts/o.h"
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#include "libc/sysv/consts/ok.h"
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#include "libc/sysv/errfuns.h"
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__msabi extern typeof(CloseHandle) *const __imp_CloseHandle;
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__msabi extern typeof(WaitForSingleObject) *const __imp_WaitForSingleObject;
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__msabi extern typeof(GetExitCodeProcess) *const __imp_GetExitCodeProcess;
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__msabi extern typeof(UnmapViewOfFile) *const __imp_UnmapViewOfFile;
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static noinstrument __msabi bool32
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BlockExecveConsoleEvent(uint32_t dwCtrlType) {
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// block SIGINT and SIGQUIT in execve() parent process
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return true;
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}
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textwindows int sys_execve_nt(const char *program, char *const argv[],
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char *const envp[]) {
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int rc;
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size_t i;
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uint32_t dwExitCode;
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char progbuf[PATH_MAX];
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struct NtStartupInfo startinfo;
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struct NtProcessInformation procinfo;
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if (strlen(program) + 4 + 1 > PATH_MAX) {
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return enametoolong();
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}
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// this is a non-recoverable operation, so do some manual validation
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if (sys_faccessat_nt(AT_FDCWD, program, X_OK, 0) == -1) {
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stpcpy(stpcpy(progbuf, program), ".com");
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if (sys_faccessat_nt(AT_FDCWD, progbuf, X_OK, 0) != -1) {
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program = progbuf;
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} else {
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stpcpy(stpcpy(progbuf, program), ".exe");
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if (sys_faccessat_nt(AT_FDCWD, progbuf, X_OK, 0) != -1) {
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program = progbuf;
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} else {
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return eacces();
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}
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}
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}
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//////////////////////////////////////////////////////////////////////////////
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// execve operation is unrecoverable from this point
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// close cloexec handles
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for (i = 3; i < g_fds.n; ++i) {
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if (g_fds.p[i].kind != kFdEmpty && (g_fds.p[i].flags & O_CLOEXEC)) {
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__imp_CloseHandle(g_fds.p[i].handle);
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}
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}
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bzero(&startinfo, sizeof(startinfo));
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startinfo.cb = sizeof(struct NtStartupInfo);
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startinfo.dwFlags = kNtStartfUsestdhandles;
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startinfo.hStdInput = __getfdhandleactual(0);
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startinfo.hStdOutput = __getfdhandleactual(1);
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startinfo.hStdError = __getfdhandleactual(2);
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// spawn the process
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rc = ntspawn(program, argv, envp, 0, 0, 0, 1, 0, 0, &startinfo, &procinfo);
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if (rc == -1) {
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STRACE("panic: unrecoverable ntspawn(%#s) error: %m", program);
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__imp_ExitProcess(6543);
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}
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//////////////////////////////////////////////////////////////////////////////
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// zombie shell process remains, to wait for child and propagate its exit
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// code
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__imp_CloseHandle(g_fds.p[0].handle);
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__imp_CloseHandle(g_fds.p[1].handle);
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__imp_CloseHandle(procinfo.hThread);
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__imp_SetConsoleCtrlHandler((void *)BlockExecveConsoleEvent, 1);
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do {
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__imp_WaitForSingleObject(procinfo.hProcess, -1);
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dwExitCode = kNtStillActive;
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__imp_GetExitCodeProcess(procinfo.hProcess, &dwExitCode);
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} while (dwExitCode == kNtStillActive);
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__imp_CloseHandle(procinfo.hProcess);
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__imp_ExitProcess(dwExitCode);
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unreachable;
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}
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