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/*
+----------------------------------------------------------------------+
| PHP Version 4 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2003 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 2.02 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available at through the world-wide-web at |
| http://www.php.net/license/2_02.txt. |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Daniel Beulshausen <daniel@php4win.de> |
+----------------------------------------------------------------------+
*/

/* $Id$ */

#include <stdio.h>
#include <fcntl.h>
#include <io.h>
#include <process.h>
#include <time.h>

#include "TSRM.h"

#ifdef TSRM_WIN32
#include "tsrm_win32.h"

#ifdef ZTS
static ts_rsrc_id win32_globals_id;
#else
static tsrm_win32_globals win32_globals;
#endif

static void tsrm_win32_ctor(tsrm_win32_globals *globals TSRMLS_DC)
{
globals->process = NULL;
globals->shm = NULL;
globals->process_size = 0;
globals->shm_size = 0;
globals->comspec = _strdup((GetVersion()<0x80000000)?"cmd.exe":"command.com");
}

static void tsrm_win32_dtor(tsrm_win32_globals *globals TSRMLS_DC)
{
shm_pair *ptr;

if (globals->process) {
free(globals->process);
}

if (globals->shm) {
for (ptr = globals->shm; ptr < (globals->shm + globals->shm_size); ptr++) {
UnmapViewOfFile(ptr->addr);
CloseHandle(ptr->segment);
UnmapViewOfFile(ptr->descriptor);
CloseHandle(ptr->info);
}
free(globals->shm);
}

free(globals->comspec);
}

TSRM_API void tsrm_win32_startup(void)
{
#ifdef ZTS
ts_allocate_id(&win32_globals_id, sizeof(tsrm_win32_globals), (ts_allocate_ctor)tsrm_win32_ctor, (ts_allocate_ctor)tsrm_win32_dtor);
#else
tsrm_win32_ctor(&win32_globals TSRMLS_CC);
#endif
}

TSRM_API void tsrm_win32_shutdown(void)
{
#ifndef ZTS
tsrm_win32_dtor(&win32_globals TSRMLS_CC);
#endif
}

static process_pair *process_get(FILE *stream TSRMLS_DC)
{
process_pair *ptr;
process_pair *newptr;

for (ptr = TWG(process); ptr < (TWG(process) + TWG(process_size)); ptr++) {
if (ptr->stream == stream) {
break;
}
}

if (ptr < (TWG(process) + TWG(process_size))) {
return ptr;
}

newptr = (process_pair*)realloc((void*)TWG(process), (TWG(process_size)+1)*sizeof(process_pair));
if (newptr == NULL) {
return NULL;
}

TWG(process) = newptr;
ptr = newptr + TWG(process_size);
TWG(process_size)++;
return ptr;
}

static shm_pair *shm_get(int key, void *addr)
{
shm_pair *ptr;
shm_pair *newptr;
TSRMLS_FETCH();

for (ptr = TWG(shm); ptr < (TWG(shm) + TWG(shm_size)); ptr++) {
if (!ptr->descriptor) {
continue;
}
if (!addr && ptr->descriptor->shm_perm.key == key) {
break;
} else if (ptr->addr == addr) {
break;
}
}

if (ptr < (TWG(shm) + TWG(shm_size))) {
return ptr;
}

newptr = (shm_pair*)realloc((void*)TWG(shm), (TWG(shm_size)+1)*sizeof(shm_pair));
if (newptr == NULL) {
return NULL;
}

TWG(shm) = newptr;
ptr = newptr + TWG(shm_size);
TWG(shm_size)++;
return ptr;
}

static HANDLE dupHandle(HANDLE fh, BOOL inherit) {
HANDLE copy, self = GetCurrentProcess();
if (!DuplicateHandle(self, fh, self, &copy, 0, inherit, DUPLICATE_SAME_ACCESS|DUPLICATE_CLOSE_SOURCE)) {
return NULL;
}
return copy;
}

TSRM_API FILE *popen(const char *command, const char *type)
{
return popen_ex(command, type, NULL, NULL);
}

TSRM_API FILE *popen_ex(const char *command, const char *type, const char *cwd, char *env)
{
FILE *stream = NULL;
int fno, str_len = strlen(type), read, mode;
STARTUPINFO startup;
PROCESS_INFORMATION process;
SECURITY_ATTRIBUTES security;
HANDLE in, out;
char *cmd;
process_pair *proc;
TSRMLS_FETCH();

security.nLength = sizeof(SECURITY_ATTRIBUTES);
security.bInheritHandle = TRUE;
security.lpSecurityDescriptor = NULL;

if (!str_len || !CreatePipe(&in, &out, &security, 2048L)) {
return NULL;
}

memset(&startup, 0, sizeof(STARTUPINFO));
memset(&process, 0, sizeof(PROCESS_INFORMATION));

startup.cb = sizeof(STARTUPINFO);
startup.dwFlags = STARTF_USESTDHANDLES;
startup.hStdError = GetStdHandle(STD_ERROR_HANDLE);

read = (type[0] == 'r') ? TRUE : FALSE;
mode = ((str_len == 2) && (type[1] == 'b')) ? O_BINARY : O_TEXT;


if (read) {
in = dupHandle(in, FALSE);
startup.hStdInput = GetStdHandle(STD_INPUT_HANDLE);
startup.hStdOutput = out;
} else {
out = dupHandle(out, FALSE);
startup.hStdInput = in;
startup.hStdOutput = GetStdHandle(STD_OUTPUT_HANDLE);
}

cmd = (char*)malloc(strlen(command)+strlen(TWG(comspec))+sizeof(" /c "));
sprintf(cmd, "%s /c %s", TWG(comspec), command);
if (!CreateProcess(NULL, cmd, &security, &security, security.bInheritHandle, NORMAL_PRIORITY_CLASS, env, cwd, &startup, &process)) {
return NULL;
}
free(cmd);

CloseHandle(process.hThread);
proc = process_get(NULL TSRMLS_CC);

if (read) {
fno = _open_osfhandle((long)in, _O_RDONLY | mode);
CloseHandle(out);
} else {
fno = _open_osfhandle((long)out, _O_WRONLY | mode);
CloseHandle(in);
}

stream = _fdopen(fno, type);
proc->prochnd = process.hProcess;
proc->stream = stream;
return stream;
}

TSRM_API int pclose(FILE *stream)
{
DWORD termstat = 0;
process_pair *process;
TSRMLS_FETCH();

if ((process = process_get(stream TSRMLS_CC)) == NULL) {
return 0;
}

fflush(process->stream);
    fclose(process->stream);

WaitForSingleObject(process->prochnd, INFINITE);
GetExitCodeProcess(process->prochnd, &termstat);
process->stream = NULL;
CloseHandle(process->prochnd);

return termstat;
}

TSRM_API int shmget(int key, int size, int flags)
{
shm_pair *shm;
char shm_segment[26], shm_info[29];
HANDLE shm_handle, info_handle;
BOOL created = FALSE;

if (size < 0) {
return -1;
}

sprintf(shm_segment, "TSRM_SHM_SEGMENT:%d", key);
sprintf(shm_info, "TSRM_SHM_DESCRIPTOR:%d", key);

shm_handle = OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, shm_segment);
info_handle = OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, shm_info);

if ((!shm_handle && !info_handle)) {
if (flags & IPC_EXCL) {
return -1;
}
if (flags & IPC_CREAT) {
shm_handle = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, size, shm_segment);
info_handle = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, sizeof(shm->descriptor), shm_info);
created = TRUE;
}
if ((!shm_handle || !info_handle)) {
return -1;
}
}

shm = shm_get(key, NULL);
shm->segment = shm_handle;
shm->info = info_handle;
shm->descriptor = MapViewOfFileEx(shm->info, FILE_MAP_ALL_ACCESS, 0, 0, 0, NULL);

if (created) {
shm->descriptor->shm_perm.key = key;
shm->descriptor->shm_segsz = size;
shm->descriptor->shm_ctime = time(NULL);
shm->descriptor->shm_cpid = getpid();
shm->descriptor->shm_perm.mode = flags;

shm->descriptor->shm_perm.cuid = shm->descriptor->shm_perm.cgid= 0;
shm->descriptor->shm_perm.gid = shm->descriptor->shm_perm.uid = 0;
shm->descriptor->shm_atime = shm->descriptor->shm_dtime = 0;
shm->descriptor->shm_lpid = shm->descriptor->shm_nattch = 0;
shm->descriptor->shm_perm.mode = shm->descriptor->shm_perm.seq = 0;
}

if (shm->descriptor->shm_perm.key != key || size > shm->descriptor->shm_segsz ) {
CloseHandle(shm->segment);
UnmapViewOfFile(shm->descriptor);
CloseHandle(shm->info);
return -1;
}

return key;
}

TSRM_API void *shmat(int key, const void *shmaddr, int flags)
{
shm_pair *shm = shm_get(key, NULL);

if (!shm->segment) {
return (void*)-1;
}

shm->descriptor->shm_atime = time(NULL);
shm->descriptor->shm_lpid = getpid();
shm->descriptor->shm_nattch++;

shm->addr = MapViewOfFileEx(shm->segment, FILE_MAP_ALL_ACCESS, 0, 0, 0, NULL);

return shm->addr;
}

TSRM_API int shmdt(const void *shmaddr)
{
shm_pair *shm = shm_get(0, (void*)shmaddr);

if (!shm->segment) {
return -1;
}

shm->descriptor->shm_dtime = time(NULL);
shm->descriptor->shm_lpid = getpid();
shm->descriptor->shm_nattch--;

return UnmapViewOfFile(shm->addr) ? 0 : -1;
}

TSRM_API int shmctl(int key, int cmd, struct shmid_ds *buf) {
shm_pair *shm = shm_get(key, NULL);

if (!shm->segment) {
return -1;
}

switch (cmd) {
case IPC_STAT:
memcpy(buf, shm->descriptor, sizeof(struct shmid_ds));
return 0;

case IPC_SET:
shm->descriptor->shm_ctime = time(NULL);
shm->descriptor->shm_perm.uid = buf->shm_perm.uid;
shm->descriptor->shm_perm.gid = buf->shm_perm.gid;
shm->descriptor->shm_perm.mode = buf->shm_perm.mode;
return 0;

case IPC_RMID:
if (shm->descriptor->shm_nattch < 1) {
shm->descriptor->shm_perm.key = -1;
}
return 0;

default:
return -1;
}
}

TSRM_API char *realpath(char *orig_path, char *buffer)
{
int ret = GetFullPathName(orig_path, _MAX_PATH, buffer, NULL);
if(!ret || ret > _MAX_PATH) {
return NULL;
}
return buffer;
}
#endif
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