sdk/lib/crt/process/_system.c

   1 /*
   2  * COPYRIGHT:   See COPYING in the top level directory
   3  * PROJECT:     ReactOS system libraries
   4  * FILE:        lib/sdk/crt/process/_system.c
   5  * PURPOSE:     Excutes a shell command
   6  * PROGRAMER:   Ariadne
   7  * UPDATE HISTORY:
   8  *              04/03/99: Created
   9  */
  10
  11 #include <precomp.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <process.h>
  15
  16
  17 /*
  18  * @implemented
  19  */
  20 int system(const char *command)
  21 {
  22   char *szCmdLine = NULL;
  23   char *szComSpec = NULL;
  24
  25   PROCESS_INFORMATION ProcessInformation;
  26   STARTUPINFOA StartupInfo;
  27   char *s;
  28   BOOL result;
  29
  30   int nStatus;
  31
  32   szComSpec = getenv("COMSPEC");
  33
  34 // system should return 0 if command is null and the shell is found
  35
  36   if (command == NULL) {
  37     if (szComSpec == NULL)
  38       return 0;
  39     else
  40       return 1;
  41   }
  42
  43   if (szComSpec == NULL)
  44     return -1;
  45
  46 // should return 127 or 0 ( MS ) if the shell is not found
  47 // _set_errno(ENOENT);
  48
  49   if (szComSpec == NULL)
  50   {
  51     szComSpec = "cmd.exe";
  52   }
  53
  54   /* split the path from shell command */
  55   s = max(strrchr(szComSpec, '\\'), strrchr(szComSpec, '/'));
  56   if (s == NULL)
  57     s = szComSpec;
  58   else
  59     s++;
  60
  61   szCmdLine = malloc(strlen(s) + 4 + strlen(command) + 1);
  62   if (szCmdLine == NULL)
  63   {
  64      _set_errno(ENOMEM);
  65      return -1;
  66   }
  67
  68   strcpy(szCmdLine, s);
  69   s = strrchr(szCmdLine, '.');
  70   if (s)
  71     *s = 0;
  72   strcat(szCmdLine, " /C ");
  73   strcat(szCmdLine, command);
  74
  75 //command file has invalid format ENOEXEC
  76
  77   memset (&StartupInfo, 0, sizeof(StartupInfo));
  78   StartupInfo.cb = sizeof(StartupInfo);
  79   StartupInfo.lpReserved= NULL;
  80   StartupInfo.dwFlags = STARTF_USESHOWWINDOW;
  81   StartupInfo.wShowWindow = SW_SHOWDEFAULT;
  82   StartupInfo.lpReserved2 = NULL;
  83   StartupInfo.cbReserved2 = 0;
  84
  85 // According to ansi standards the new process should ignore  SIGINT and SIGQUIT
  86 // In order to disable ctr-c the process is created with CREATE_NEW_PROCESS_GROUP,
  87 // thus SetConsoleCtrlHandler(NULL,TRUE) is made on behalf of the new process.
  88
  89
  90 //SIGCHILD should be blocked aswell
  91
  92   result = CreateProcessA(szComSpec,
  93                           szCmdLine,
  94                           NULL,
  95                           NULL,
  96                           TRUE,
  97                           CREATE_NEW_PROCESS_GROUP,
  98                           NULL,
  99                           NULL,
 100                           &StartupInfo,
 101                           &ProcessInformation);
 102   free(szCmdLine);
 103
 104   if (result == FALSE)
 105   {
 106         _dosmaperr(GetLastError());
 107      return -1;
 108   }
 109
 110   CloseHandle(ProcessInformation.hThread);
 111
 112 // system should wait untill the calling process is finished
 113   _cwait(&nStatus,(intptr_t)ProcessInformation.hProcess,0);
 114   CloseHandle(ProcessInformation.hProcess);
 115
 116   return nStatus;
 117 }
 118
 119 int CDECL _wsystem(const wchar_t* cmd)
 120 {
 121     FIXME("_wsystem stub\n");
 122     return -1;
 123 }