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Justine Tunney 2020-06-15 07:18:57 -07:00
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libc/calls/hefty/ntspawn.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 2020 Justine Alexandra Roberts Tunney │
│ │
│ This program is free software; you can redistribute it and/or modify │
│ it under the terms of the GNU General Public License as published by │
│ the Free Software Foundation; version 2 of the License. │
│ │
│ This program is distributed in the hope that it will be useful, but │
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
│ General Public License for more details. │
│ │
│ You should have received a copy of the GNU General Public License │
│ along with this program; if not, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/alg/alg.h"
#include "libc/alg/arraylist.h"
#include "libc/bits/bits.h"
#include "libc/bits/safemacros.h"
#include "libc/calls/calls.h"
#include "libc/calls/hefty/ntspawn.h"
#include "libc/calls/internal.h"
#include "libc/conv/conv.h"
#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;
if (mkntpath(program, program16) != -1 &&
(lpCommandLine = mkntcmdline(argv)) &&
(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();
}
} else {
rc = -1;
}
free(lpCommandLine);
free(lpEnvironment);
return rc;
}