reactos/lib/sdk/crt/process/_system.c

   1 /* $Id$
   2  *
   3  * COPYRIGHT:   See COPYING in the top level directory
   4  * PROJECT:     ReactOS system libraries
   5  * FILE:        lib/msvcrt/process/system.c
   6  * PURPOSE:     Excutes a shell command
   7  * PROGRAMER:   Ariadne
   8  * UPDATE HISTORY:
   9  *              04/03/99: Created
  10  */
  11
  12 #include <precomp.h>
  13 #include <stdlib.h>
  14 #include <string.h>
  15 #include <process.h>
  16
  17
  18 /*
  19  * @implemented
  20  */
  21 int system(const char *command)
  22 {
  23   char *szCmdLine = NULL;
  24   char *szComSpec = NULL;
  25
  26   PROCESS_INFORMATION ProcessInformation;
  27   STARTUPINFOA StartupInfo;
  28   char *s;
  29   BOOL result;
  30
  31   int nStatus;
  32
  33   szComSpec = getenv("COMSPEC");
  34
  35 // system should return 0 if command is null and the shell is found
  36
  37   if (command == NULL) {
  38       if (szComSpec == NULL)
  39         return 0;
  40       else
  41         return -1;
  42     }
  43
  44 // should return 127 or 0 ( MS ) if the shell is not found
  45 // __set_errno(ENOENT);
  46
  47   if (szComSpec == NULL)
  48   {
  49     szComSpec = "cmd.exe";
  50   }
  51
  52   /* split the path from shell command */
  53   s = max(strrchr(szComSpec, '\\'), strrchr(szComSpec, '/'));
  54   if (s == NULL)
  55     s = szComSpec;
  56   else
  57     s++;
  58
  59   szCmdLine = malloc(strlen(s) + 4 + strlen(command) + 1);
  60   if (szCmdLine == NULL)
  61   {
  62      __set_errno(ENOMEM);
  63      return -1;
  64   }
  65
  66   strcpy(szCmdLine, s);
  67   s = strrchr(szCmdLine, '.');
  68   if (s)
  69     *s = 0;
  70   strcat(szCmdLine, " /C ");
  71   strcat(szCmdLine, command);
  72
  73 //command file has invalid format ENOEXEC
  74
  75   memset (&StartupInfo, 0, sizeof(StartupInfo));
  76   StartupInfo.cb = sizeof(StartupInfo);
  77   StartupInfo.lpReserved= NULL;
  78   StartupInfo.dwFlags = STARTF_USESHOWWINDOW;
  79   StartupInfo.wShowWindow = SW_SHOWDEFAULT;
  80   StartupInfo.lpReserved2 = NULL;
  81   StartupInfo.cbReserved2 = 0;
  82
  83 // According to ansi standards the new process should ignore  SIGINT and SIGQUIT
  84 // In order to disable ctr-c the process is created with CREATE_NEW_PROCESS_GROUP,
  85 // thus SetConsoleCtrlHandler(NULL,TRUE) is made on behalf of the new process.
  86
  87
  88 //SIGCHILD should be blocked aswell
  89
  90   result = CreateProcessA(szComSpec,
  91                           szCmdLine,
  92                           NULL,
  93                           NULL,
  94                           TRUE,
  95                           CREATE_NEW_PROCESS_GROUP,
  96                           NULL,
  97                           NULL,
  98                           &StartupInfo,
  99                           &ProcessInformation);
 100   free(szCmdLine);
 101
 102   if (result == FALSE)
 103   {
 104         _dosmaperr(GetLastError());
 105      return -1;
 106   }
 107
 108   CloseHandle(ProcessInformation.hThread);
 109
 110 // system should wait untill the calling process is finished
 111   _cwait(&nStatus,(intptr_t)ProcessInformation.hProcess,0);
 112   CloseHandle(ProcessInformation.hProcess);
 113
 114   return nStatus;
 115 }
 116
 117 int CDECL _wsystem(const wchar_t* cmd)
 118 {
 119     FIXME("_wsystem stub\n");
 120     return -1;
 121 }