Sweden-Number/dlls/msvcrt/process.c

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/*
* msvcrt.dll spawn/exec functions
*
* Copyright 1996,1998 Marcus Meissner
* Copyright 1996 Jukka Iivonen
* Copyright 1997,2000 Uwe Bonnes
* Copyright 2000 Jon Griffiths
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
* FIXME:
* -File handles need some special handling. Sometimes children get
* open file handles, sometimes not. The docs are confusing
* -No check for maximum path/argument/environment size is done
*/
#include "config.h"
#include <stdarg.h>
#include "msvcrt.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
/* INTERNAL: Spawn a child process */
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static MSVCRT_intptr_t msvcrt_spawn(int flags, const char* exe, char* cmdline, char* env)
{
STARTUPINFOA si;
PROCESS_INFORMATION pi;
if ((unsigned)flags > MSVCRT__P_DETACH)
{
*MSVCRT__errno() = MSVCRT_EINVAL;
return -1;
}
memset(&si, 0, sizeof(si));
si.cb = sizeof(si);
msvcrt_create_io_inherit_block(&si);
if (!CreateProcessA(exe, cmdline, NULL, NULL, TRUE,
flags == MSVCRT__P_DETACH ? DETACHED_PROCESS : 0,
env, NULL, &si, &pi))
{
msvcrt_set_errno(GetLastError());
MSVCRT_free(si.lpReserved2);
return -1;
}
MSVCRT_free(si.lpReserved2);
switch(flags)
{
case MSVCRT__P_WAIT:
WaitForSingleObject(pi.hProcess, INFINITE);
GetExitCodeProcess(pi.hProcess,&pi.dwProcessId);
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
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return pi.dwProcessId;
case MSVCRT__P_DETACH:
CloseHandle(pi.hProcess);
pi.hProcess = 0;
/* fall through */
case MSVCRT__P_NOWAIT:
case MSVCRT__P_NOWAITO:
CloseHandle(pi.hThread);
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return (MSVCRT_intptr_t)pi.hProcess;
case MSVCRT__P_OVERLAY:
MSVCRT__exit(0);
}
return -1; /* can't reach here */
}
/* INTERNAL: Convert argv list to a single 'delim'-separated string, with an
* extra '\0' to terminate it
*/
static char* msvcrt_argvtos(const char* const* arg, char delim)
{
const char* const* a;
long size;
char* p;
char* ret;
if (!arg && !delim)
{
/* Return NULL for an empty environment list */
return NULL;
}
/* get length */
a = arg;
size = 0;
while (*a)
{
size += strlen(*a) + 1;
a++;
}
ret = (char*)MSVCRT_malloc(size + 1);
if (!ret)
return NULL;
/* fill string */
a = arg;
p = ret;
while (*a)
{
int len = strlen(*a);
memcpy(p,*a,len);
p += len;
*p++ = delim;
a++;
}
if (delim && p > ret) p[-1] = 0;
else *p = 0;
return ret;
}
/* INTERNAL: Convert va_list to a single 'delim'-separated string, with an
* extra '\0' to terminate it
*/
static char* msvcrt_valisttos(const char* arg0, va_list alist, char delim)
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{
va_list alist2;
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long size;
const char *arg;
char* p;
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char *ret;
#ifdef HAVE_VA_COPY
va_copy(alist2,alist);
#else
# ifdef HAVE___VA_COPY
__va_copy(alist2,alist);
# else
alist2 = alist;
# endif
#endif
if (!arg0)
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{
/* Return NULL for an empty environment list */
return NULL;
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}
/* get length */
arg = arg0;
size = 0;
do {
size += strlen(arg) + 1;
arg = va_arg(alist, char*);
} while (arg != NULL);
ret = (char*)MSVCRT_malloc(size + 1);
if (!ret)
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return NULL;
/* fill string */
arg = arg0;
p = ret;
do {
int len = strlen(arg);
memcpy(p,arg,len);
p += len;
*p++ = delim;
arg = va_arg(alist2, char*);
} while (arg != NULL);
if (delim && p > ret) p[-1] = 0;
else *p = 0;
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return ret;
}
/*********************************************************************
* _cwait (MSVCRT.@)
*/
MSVCRT_intptr_t CDECL _cwait(int *status, MSVCRT_intptr_t pid, int action)
{
HANDLE hPid = (HANDLE)pid;
int doserrno;
action = action; /* Remove warning */
if (!WaitForSingleObject(hPid, INFINITE))
{
if (status)
{
DWORD stat;
GetExitCodeProcess(hPid, &stat);
*status = (int)stat;
}
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return pid;
}
doserrno = GetLastError();
if (doserrno == ERROR_INVALID_HANDLE)
{
*MSVCRT__errno() = MSVCRT_ECHILD;
*MSVCRT___doserrno() = doserrno;
}
else
msvcrt_set_errno(doserrno);
return status ? *status = -1 : -1;
}
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/*********************************************************************
* _execl (MSVCRT.@)
*
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* Like on Windows, this function does not handle arguments with spaces
* or double-quotes.
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*/
MSVCRT_intptr_t CDECL _execl(const char* name, const char* arg0, ...)
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{
va_list ap;
char * args;
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MSVCRT_intptr_t ret;
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va_start(ap, arg0);
args = msvcrt_valisttos(arg0, ap, ' ');
va_end(ap);
ret = msvcrt_spawn(MSVCRT__P_OVERLAY, name, args, NULL);
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MSVCRT_free(args);
return ret;
}
/*********************************************************************
* _execle (MSVCRT.@)
*/
MSVCRT_intptr_t CDECL _execle(const char* name, const char* arg0, ...)
{
FIXME("stub\n");
return -1;
}
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/*********************************************************************
* _execlp (MSVCRT.@)
*
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* Like on Windows, this function does not handle arguments with spaces
* or double-quotes.
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*/
MSVCRT_intptr_t CDECL _execlp(const char* name, const char* arg0, ...)
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{
va_list ap;
char * args;
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MSVCRT_intptr_t ret;
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char fullname[MAX_PATH];
_searchenv(name, "PATH", fullname);
va_start(ap, arg0);
args = msvcrt_valisttos(arg0, ap, ' ');
va_end(ap);
ret = msvcrt_spawn(MSVCRT__P_OVERLAY, fullname[0] ? fullname : name, args, NULL);
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MSVCRT_free(args);
return ret;
}
/*********************************************************************
* _execlpe (MSVCRT.@)
*/
MSVCRT_intptr_t CDECL _execlpe(const char* name, const char* arg0, ...)
{
FIXME("stub\n");
return -1;
}
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/*********************************************************************
* _execv (MSVCRT.@)
*
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* Like on Windows, this function does not handle arguments with spaces
* or double-quotes.
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*/
MSVCRT_intptr_t CDECL _execv(const char* name, char* const* argv)
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{
return _spawnve(MSVCRT__P_OVERLAY, name, (const char* const*) argv, NULL);
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}
/*********************************************************************
* _execve (MSVCRT.@)
*
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* Like on Windows, this function does not handle arguments with spaces
* or double-quotes.
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*/
MSVCRT_intptr_t CDECL MSVCRT__execve(const char* name, char* const* argv, const char* const* envv)
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{
return _spawnve(MSVCRT__P_OVERLAY, name, (const char* const*) argv, envv);
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}
/*********************************************************************
* _execvpe (MSVCRT.@)
*
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* Like on Windows, this function does not handle arguments with spaces
* or double-quotes.
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*/
MSVCRT_intptr_t CDECL _execvpe(const char* name, char* const* argv, const char* const* envv)
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{
char fullname[MAX_PATH];
_searchenv(name, "PATH", fullname);
return _spawnve(MSVCRT__P_OVERLAY, fullname[0] ? fullname : name,
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(const char* const*) argv, envv);
}
/*********************************************************************
* _execvp (MSVCRT.@)
*
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* Like on Windows, this function does not handle arguments with spaces
* or double-quotes.
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*/
MSVCRT_intptr_t CDECL _execvp(const char* name, char* const* argv)
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{
return _execvpe(name, argv, NULL);
}
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/*********************************************************************
* _spawnl (MSVCRT.@)
*
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* Like on Windows, this function does not handle arguments with spaces
* or double-quotes.
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*/
MSVCRT_intptr_t CDECL _spawnl(int flags, const char* name, const char* arg0, ...)
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{
va_list ap;
char * args;
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MSVCRT_intptr_t ret;
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va_start(ap, arg0);
args = msvcrt_valisttos(arg0, ap, ' ');
va_end(ap);
ret = msvcrt_spawn(flags, name, args, NULL);
MSVCRT_free(args);
return ret;
}
/*********************************************************************
* _spawnle (MSVCRT.@)
*/
MSVCRT_intptr_t CDECL _spawnle(int flags, const char* name, const char* arg0, ...)
{
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va_list ap;
char *args, *envs = NULL;
const char * const *envp;
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MSVCRT_intptr_t ret;
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va_start(ap, arg0);
args = msvcrt_valisttos(arg0, ap, ' ');
va_end(ap);
va_start(ap, arg0);
while (va_arg( ap, char * ) != NULL) /*nothing*/;
envp = va_arg( ap, const char * const * );
if (envp) envs = msvcrt_argvtos(envp, 0);
va_end(ap);
ret = msvcrt_spawn(flags, name, args, envs);
MSVCRT_free(args);
MSVCRT_free(envs);
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return ret;
}
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/*********************************************************************
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* _spawnlp (MSVCRT.@)
*
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* Like on Windows, this function does not handle arguments with spaces
* or double-quotes.
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*/
MSVCRT_intptr_t CDECL _spawnlp(int flags, const char* name, const char* arg0, ...)
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{
va_list ap;
char * args;
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MSVCRT_intptr_t ret;
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char fullname[MAX_PATH];
_searchenv(name, "PATH", fullname);
va_start(ap, arg0);
args = msvcrt_valisttos(arg0, ap, ' ');
va_end(ap);
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ret = msvcrt_spawn(flags, fullname[0] ? fullname : name, args, NULL);
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MSVCRT_free(args);
return ret;
}
/*********************************************************************
* _spawnlpe (MSVCRT.@)
*/
MSVCRT_intptr_t CDECL _spawnlpe(int flags, const char* name, const char* arg0, ...)
{
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va_list ap;
char *args, *envs = NULL;
const char * const *envp;
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MSVCRT_intptr_t ret;
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char fullname[MAX_PATH];
_searchenv(name, "PATH", fullname);
va_start(ap, arg0);
args = msvcrt_valisttos(arg0, ap, ' ');
va_end(ap);
va_start(ap, arg0);
while (va_arg( ap, char * ) != NULL) /*nothing*/;
envp = va_arg( ap, const char * const * );
if (envp) envs = msvcrt_argvtos(envp, 0);
va_end(ap);
ret = msvcrt_spawn(flags, fullname[0] ? fullname : name, args, envs);
MSVCRT_free(args);
MSVCRT_free(envs);
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return ret;
}
/*********************************************************************
* _spawnve (MSVCRT.@)
*
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* Like on Windows, this function does not handle arguments with spaces
* or double-quotes.
*/
MSVCRT_intptr_t CDECL _spawnve(int flags, const char* name, const char* const* argv,
const char* const* envv)
{
char * args = msvcrt_argvtos(argv,' ');
char * envs = msvcrt_argvtos(envv,0);
char fullname[MAX_PATH];
const char *p;
int len;
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MSVCRT_intptr_t ret = -1;
TRACE(":call (%s), params (%s), env (%s)\n",debugstr_a(name),debugstr_a(args),
envs?"Custom":"Null");
/* no check for NULL name.
native doesn't do it */
p = memchr(name, '\0', MAX_PATH);
if( !p )
p = name + MAX_PATH - 1;
len = p - name;
/* extra-long names are silently truncated. */
memcpy(fullname, name, len);
for( p--; p >= name; p-- )
{
if( *p == '\\' || *p == '/' || *p == ':' || *p == '.' )
break;
}
/* if no extension is given, assume .exe */
if( (p < name || *p != '.') && len <= MAX_PATH - 5 )
{
FIXME("only trying .exe when no extension given\n");
memcpy(fullname+len, ".exe", 4);
len += 4;
}
fullname[len] = '\0';
if (args)
{
ret = msvcrt_spawn(flags, fullname, args, envs);
MSVCRT_free(args);
}
MSVCRT_free(envs);
return ret;
}
/*********************************************************************
* _spawnv (MSVCRT.@)
*
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* Like on Windows, this function does not handle arguments with spaces
* or double-quotes.
*/
MSVCRT_intptr_t CDECL _spawnv(int flags, const char* name, const char* const* argv)
{
return _spawnve(flags, name, argv, NULL);
}
/*********************************************************************
* _spawnvpe (MSVCRT.@)
*
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* Like on Windows, this function does not handle arguments with spaces
* or double-quotes.
*/
MSVCRT_intptr_t CDECL _spawnvpe(int flags, const char* name, const char* const* argv,
const char* const* envv)
{
char fullname[MAX_PATH];
_searchenv(name, "PATH", fullname);
return _spawnve(flags, fullname[0] ? fullname : name, argv, envv);
}
/*********************************************************************
* _spawnvp (MSVCRT.@)
*
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* Like on Windows, this function does not handle arguments with spaces
* or double-quotes.
*/
MSVCRT_intptr_t CDECL _spawnvp(int flags, const char* name, const char* const* argv)
{
return _spawnvpe(flags, name, argv, NULL);
}
/*********************************************************************
* _popen (MSVCRT.@)
* FIXME: convert to _wpopen and call that from here instead? But it
* would have to convert the command back to ANSI to call msvcrt_spawn,
* less than ideal.
*/
MSVCRT_FILE* CDECL MSVCRT__popen(const char* command, const char* mode)
{
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static const char wcmd[] = "cmd", cmdFlag[] = " /C ", comSpec[] = "COMSPEC";
MSVCRT_FILE *ret;
BOOL readPipe = TRUE;
int textmode, fds[2], fdToDup, fdToOpen, fdStdHandle = -1, fdStdErr = -1;
const char *p;
char *cmdcopy;
DWORD comSpecLen;
TRACE("(command=%s, mode=%s)\n", debugstr_a(command), debugstr_a(mode));
if (!command || !mode)
return NULL;
textmode = *__p__fmode() & (MSVCRT__O_BINARY | MSVCRT__O_TEXT);
for (p = mode; *p; p++)
{
switch (*p)
{
case 'W':
case 'w':
readPipe = FALSE;
break;
case 'B':
case 'b':
textmode |= MSVCRT__O_BINARY;
textmode &= ~MSVCRT__O_TEXT;
break;
case 'T':
case 't':
textmode |= MSVCRT__O_TEXT;
textmode &= ~MSVCRT__O_BINARY;
break;
}
}
if (_pipe(fds, 0, textmode) == -1)
return NULL;
fdToDup = readPipe ? 1 : 0;
fdToOpen = readPipe ? 0 : 1;
if ((fdStdHandle = _dup(fdToDup)) == -1)
goto error;
if (_dup2(fds[fdToDup], fdToDup) != 0)
goto error;
if (readPipe)
{
if ((fdStdErr = _dup(MSVCRT_STDERR_FILENO)) == -1)
goto error;
if (_dup2(fds[fdToDup], MSVCRT_STDERR_FILENO) != 0)
goto error;
}
_close(fds[fdToDup]);
comSpecLen = GetEnvironmentVariableA(comSpec, NULL, 0);
if (!comSpecLen)
comSpecLen = strlen(wcmd) + 1;
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cmdcopy = HeapAlloc(GetProcessHeap(), 0, comSpecLen + strlen(cmdFlag)
+ strlen(command));
if (!GetEnvironmentVariableA(comSpec, cmdcopy, comSpecLen))
strcpy(cmdcopy, wcmd);
strcat(cmdcopy, cmdFlag);
strcat(cmdcopy, command);
if (msvcrt_spawn(MSVCRT__P_NOWAIT, NULL, cmdcopy, NULL) == -1)
{
_close(fds[fdToOpen]);
ret = NULL;
}
else
{
ret = MSVCRT__fdopen(fds[fdToOpen], mode);
if (!ret)
_close(fds[fdToOpen]);
}
HeapFree(GetProcessHeap(), 0, cmdcopy);
_dup2(fdStdHandle, fdToDup);
_close(fdStdHandle);
if (readPipe)
{
_dup2(fdStdErr, MSVCRT_STDERR_FILENO);
_close(fdStdErr);
}
return ret;
error:
if (fdStdHandle != -1) _close(fdStdHandle);
if (fdStdErr != -1) _close(fdStdErr);
_close(fds[0]);
_close(fds[1]);
return NULL;
}
/*********************************************************************
* _wpopen (MSVCRT.@)
*/
MSVCRT_FILE* CDECL MSVCRT__wpopen(const MSVCRT_wchar_t* command, const MSVCRT_wchar_t* mode)
{
FIXME("(command=%s, mode=%s): stub\n", debugstr_w(command), debugstr_w(mode));
return NULL;
}
/*********************************************************************
* _pclose (MSVCRT.@)
*/
int CDECL MSVCRT__pclose(MSVCRT_FILE* file)
{
return MSVCRT_fclose(file);
}
/*********************************************************************
* system (MSVCRT.@)
*/
int CDECL MSVCRT_system(const char* cmd)
{
char* cmdcopy;
int res;
/* Make a writable copy for CreateProcess */
cmdcopy=_strdup(cmd);
/* FIXME: should probably launch cmd interpreter in COMSPEC */
res=msvcrt_spawn(MSVCRT__P_WAIT, NULL, cmdcopy, NULL);
MSVCRT_free(cmdcopy);
return res;
}
/*********************************************************************
* _loaddll (MSVCRT.@)
*/
MSVCRT_intptr_t CDECL _loaddll(const char* dllname)
{
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return (MSVCRT_intptr_t)LoadLibraryA(dllname);
}
/*********************************************************************
* _unloaddll (MSVCRT.@)
*/
int CDECL _unloaddll(MSVCRT_intptr_t dll)
{
if (FreeLibrary((HMODULE)dll))
return 0;
else
{
int err = GetLastError();
msvcrt_set_errno(err);
return err;
}
}
/*********************************************************************
* _getdllprocaddr (MSVCRT.@)
*/
void * CDECL _getdllprocaddr(MSVCRT_intptr_t dll, const char *name, int ordinal)
{
if (name)
{
if (ordinal != -1) return NULL;
return GetProcAddress( (HMODULE)dll, name );
}
if (HIWORD(ordinal)) return NULL;
return GetProcAddress( (HMODULE)dll, (LPCSTR)(ULONG_PTR)ordinal );
}