mirror of
https://github.com/jart/cosmopolitan.git
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6f7d0cb1c3
This makes breaking changes to add underscores to many non-standard function names provided by the c library. MODE=tiny is now tinier and we now use smaller locks that are better for tiny apps in this mode. Some headers have been renamed to be in the same folder as the build package, so it'll be easier to know which build dependency is needed. Certain old misguided interfaces have been removed. Intel intrinsics headers are now listed in libc/isystem (but not in the amalgamation) to help further improve open source compatibility. Header complexity has also been reduced. Lastly, more shell scripts are now available.
124 lines
5.3 KiB
C
124 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/syscall-nt.internal.h"
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#include "libc/intrin/strace.internal.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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notpossible;
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}
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