cosmopolitan/libc/calls/hefty/ntspawn.c

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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 2020 Justine Alexandra Roberts Tunney
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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.
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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.
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*/
#include "libc/alg/alg.h"
#include "libc/alg/arraylist.internal.h"
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#include "libc/bits/bits.h"
#include "libc/bits/safemacros.h"
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#include "libc/calls/calls.h"
#include "libc/calls/hefty/ntspawn.h"
#include "libc/calls/internal.h"
#include "libc/fmt/conv.h"
#include "libc/nt/enum/processcreationflags.h"
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#include "libc/nt/process.h"
#include "libc/nt/runtime.h"
#include "libc/runtime/runtime.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/fileno.h"
#include "libc/sysv/errfuns.h"
/**
* Spawns process on Windows NT.
*
* This function delegates to CreateProcess() with UTF-8 UTF-16
* translation and argv escaping. Please note this will NOT escape
* command interpreter syntax.
*
* @param program will not be PATH searched, see commandv()
* @param argv[0] is the name of the program to run
* @param argv[1,n-2] optionally specifies program arguments
* @param argv[n-1] is NULL
* @param envp[𝟶,m-2] specifies "foo=bar" environment variables, which
* don't need to be passed in sorted order; however, this function
* goes faster the closer they are to sorted
* @param envp[m-1] is NULL
* @param bInheritHandles means handles already marked inheritable will
* be inherited; which, assuming the System V wrapper functions are
* being used, should mean (1) all files and sockets that weren't
* opened with O_CLOEXEC; and (2) all memory mappings
* @param opt_out_lpProcessInformation can be used to return process and
* thread IDs to parent, as well as open handles that need close()
* @return 0 on success, or -1 w/ errno
* @see spawnve() which abstracts this function
*/
textwindows int ntspawn(
const char *program, char *const argv[], char *const envp[],
struct NtSecurityAttributes *opt_lpProcessAttributes,
struct NtSecurityAttributes *opt_lpThreadAttributes, bool32 bInheritHandles,
uint32_t dwCreationFlags, const char16_t *opt_lpCurrentDirectory,
/*nodiscard*/ const struct NtStartupInfo *lpStartupInfo,
struct NtProcessInformation *opt_out_lpProcessInformation) {
int rc;
char16_t program16[PATH_MAX], *lpCommandLine, *lpEnvironment;
lpCommandLine = NULL;
lpEnvironment = NULL;
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if (__mkntpath(program, program16) != -1 &&
(lpCommandLine = mkntcmdline(&argv[1])) &&
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(lpEnvironment = mkntenvblock(envp))) {
if (CreateProcess(program16, lpCommandLine, opt_lpProcessAttributes,
opt_lpThreadAttributes, bInheritHandles,
dwCreationFlags | kNtCreateUnicodeEnvironment,
lpEnvironment, opt_lpCurrentDirectory, lpStartupInfo,
opt_out_lpProcessInformation)) {
rc = 0;
} else {
rc = __winerr();
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}
} else {
rc = -1;
}
free(lpCommandLine);
free(lpEnvironment);
return rc;
}