programs/wcmd/batch.c

   1 /*
   2  * WCMD - Wine-compatible command line interface - batch interface.
   3  *
   4  * Copyright (C) 1999 D A Pickles
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "wcmd.h"
  22
  23 void WCMD_batch_command (char *line);
  24
  25 extern int echo_mode;
  26 extern char quals[MAX_PATH], param1[MAX_PATH], param2[MAX_PATH];
  27 extern BATCH_CONTEXT *context;
  28 extern DWORD errorlevel;
  29
  30 /* msdn specified max for Win XP */
  31 #define MAXSTRING 8192
  32
  33 /****************************************************************************
  34  * WCMD_batch
  35  *
  36  * Open and execute a batch file.
  37  * On entry *command includes the complete command line beginning with the name
  38  * of the batch file (if a CALL command was entered the CALL has been removed).
  39  * *file is the name of the file, which might not exist and may not have the
  40  * .BAT suffix on. Called is 1 for a CALL, 0 otherwise.
  41  *
  42  * We need to handle recursion correctly, since one batch program might call another.
  43  * So parameters for this batch file are held in a BATCH_CONTEXT structure.
  44  */
  45
  46 void WCMD_batch (char *file, char *command, int called) {
  47
  48 #define WCMD_BATCH_EXT_SIZE 5
  49
  50 HANDLE h = INVALID_HANDLE_VALUE;
  51 char string[MAXSTRING];
  52 char extension_batch[][WCMD_BATCH_EXT_SIZE] = {".bat",".cmd"};
  53 char extension_exe[WCMD_BATCH_EXT_SIZE] = ".exe";
  54 unsigned int  i;
  55 BATCH_CONTEXT *prev_context;
  56
  57   for(i=0; (i<(sizeof(extension_batch)/WCMD_BATCH_EXT_SIZE)) &&
  58            (h == INVALID_HANDLE_VALUE); i++) {
  59   strcpy (string, file);
  60   CharLower (string);
  61     if (strstr (string, extension_batch[i]) == NULL) strcat (string, extension_batch[i]);
  62   h = CreateFile (string, GENERIC_READ, FILE_SHARE_READ,
  63                   NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
  64   }
  65   if (h == INVALID_HANDLE_VALUE) {
  66     strcpy (string, file);
  67     CharLower (string);
  68     if (strstr (string, extension_exe) == NULL) strcat (string, extension_exe);
  69     h = CreateFile (string, GENERIC_READ, FILE_SHARE_READ,
  70                     NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
  71     if (h != INVALID_HANDLE_VALUE) {
  72       WCMD_run_program (command, 0);
  73     } else {
  74       SetLastError (ERROR_FILE_NOT_FOUND);
  75       WCMD_print_error ();
  76     }
  77     return;
  78   }
  79
  80 /*
  81  *      Create a context structure for this batch file.
  82  */
  83
  84   prev_context = context;
  85   context = (BATCH_CONTEXT *)LocalAlloc (LMEM_FIXED, sizeof (BATCH_CONTEXT));
  86   context -> h = h;
  87   context -> command = command;
  88   context -> shift_count = 0;
  89   context -> prev_context = prev_context;
  90
  91 /*
  92  *      Work through the file line by line. Specific batch commands are processed here,
  93  *      the rest are handled by the main command processor.
  94  */
  95
  96   while (WCMD_fgets (string, sizeof(string), h)) {
  97       if (strlen(string) == MAXSTRING -1) {
  98           WCMD_output_asis( "Line in Batch processing possibly truncated. Using:\n");
  99           WCMD_output_asis( string);
 100           WCMD_output_asis( "\n");
 101       }
 102       if (string[0] != ':') {                      /* Skip over labels */
 103           WCMD_batch_command (string);
 104       }
 105   }
 106   CloseHandle (h);
 107
 108 /*
 109  *      If invoked by a CALL, we return to the context of our caller. Otherwise return
 110  *      to the caller's caller.
 111  */
 112
 113   LocalFree ((HANDLE)context);
 114   if ((prev_context != NULL) && (!called)) {
 115     CloseHandle (prev_context -> h);
 116     context = prev_context -> prev_context;
 117     LocalFree ((HANDLE)prev_context);
 118   }
 119   else {
 120     context = prev_context;
 121   }
 122 }
 123
 124 /****************************************************************************
 125  * WCMD_batch_command
 126  *
 127  * Execute one line from a batch file, expanding parameters.
 128  */
 129
 130 void WCMD_batch_command (char *line) {
 131
 132 DWORD status;
 133 char cmd1[MAXSTRING],cmd2[MAXSTRING];
 134 char *p, *s, *t;
 135 int i;
 136
 137   /* Get working version of command line */
 138   strcpy(cmd1, line);
 139
 140   /* Expand environment variables in a batch file %{0-9} first  */
 141   /*   Then env vars, and if any left (ie use of undefined vars,*/
 142   /*   replace with spaces                                      */
 143   /* FIXME: Winnt would replace %1%fred%1 with first parm, then */
 144   /*   contents of fred, then the digit 1. Would need to remove */
 145   /*   ExpandEnvStrings to achieve this                         */
 146
 147   /* Replace use of %0...%9 */
 148   p = cmd1;
 149   while ((p = strchr(p, '%'))) {
 150     i = *(p+1) - '0';
 151     if ((i >= 0) && (i <= 9)) {
 152       s = strdup (p+2);
 153       t = WCMD_parameter (context -> command, i + context -> shift_count, NULL);
 154       strcpy (p, t);
 155       strcat (p, s);
 156       free (s);
 157     } else {
 158       p++;
 159     }
 160   }
 161
 162   /* Now replace environment variables */
 163   status = ExpandEnvironmentStrings(cmd1, cmd2, sizeof(cmd2));
 164   if (!status) {
 165     WCMD_print_error ();
 166     return;
 167   }
 168
 169   /* In a batch program, unknown variables are replace by nothing */
 170   /* so remove any remaining %var%                                */
 171   p = cmd2;
 172   while ((p = strchr(p, '%'))) {
 173     s = strchr(p+1, '%');
 174     if (!s) {
 175       *p=0x00;
 176     } else {
 177       t = strdup(s+1);
 178       strcpy(p, t);
 179       free(t);
 180     }
 181   }
 182
 183   /* Show prompt before batch line IF echo is on */
 184   if (echo_mode && (line[0] != '@')) {
 185     WCMD_show_prompt();
 186     WCMD_output_asis ( cmd2);
 187     WCMD_output_asis ( "\n");
 188   }
 189
 190   WCMD_process_command (cmd2);
 191 }
 192
 193 /*******************************************************************
 194  * WCMD_parameter - extract a parameter from a command line.
 195  *
 196  *      Returns the 'n'th space-delimited parameter on the command line (zero-based).
 197  *      Parameter is in static storage overwritten on the next call.
 198  *      Parameters in quotes (and brackets) are handled.
 199  *      Also returns a pointer to the location of the parameter in the command line.
 200  */
 201
 202 char *WCMD_parameter (char *s, int n, char **where) {
 203
 204 int i = 0;
 205 static char param[MAX_PATH];
 206 char *p;
 207
 208   p = param;
 209   while (TRUE) {
 210     switch (*s) {
 211       case ' ':
 212         s++;
 213         break;
 214       case '"':
 215         if (where != NULL) *where = s;
 216         s++;
 217         while ((*s != '\0') && (*s != '"')) {
 218           *p++ = *s++;
 219         }
 220         if (i == n) {
 221           *p = '\0';
 222           return param;
 223         }
 224         if (*s == '"') s++;
 225           param[0] = '\0';
 226           i++;
 227         p = param;
 228         break;
 229       case '(':
 230         if (where != NULL) *where = s;
 231         s++;
 232         while ((*s != '\0') && (*s != ')')) {
 233           *p++ = *s++;
 234         }
 235         if (i == n) {
 236           *p = '\0';
 237           return param;
 238         }
 239         if (*s == ')') s++;
 240           param[0] = '\0';
 241           i++;
 242         p = param;
 243         break;
 244       case '\0':
 245         return param;
 246       default:
 247         if (where != NULL) *where = s;
 248         while ((*s != '\0') && (*s != ' ')) {
 249           *p++ = *s++;
 250         }
 251         if (i == n) {
 252           *p = '\0';
 253           return param;
 254         }
 255           param[0] = '\0';
 256           i++;
 257         p = param;
 258     }
 259   }
 260 }
 261
 262 /****************************************************************************
 263  * WCMD_fgets
 264  *
 265  * Get one line from a batch file. We can't use the native f* functions because
 266  * of the filename syntax differences between DOS and Unix. Also need to lose
 267  * the LF (or CRLF) from the line.
 268  */
 269
 270 char *WCMD_fgets (char *s, int n, HANDLE h) {
 271
 272 DWORD bytes;
 273 BOOL status;
 274 char *p;
 275
 276   p = s;
 277   do {
 278     status = ReadFile (h, s, 1, &bytes, NULL);
 279     if ((status == 0) || ((bytes == 0) && (s == p))) return NULL;
 280     if (*s == '\n') bytes = 0;
 281     else if (*s != '\r') {
 282       s++;
 283       n--;
 284     }
 285     *s = '\0';
 286   } while ((bytes == 1) && (n > 1));
 287   return p;
 288 }