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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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 #define MAXSTRING 1024
  31
  32 /****************************************************************************
  33  * WCMD_batch
  34  *
  35  * Open and execute a batch file.
  36  * On entry *command includes the complete command line beginning with the name
  37  * of the batch file (if a CALL command was entered the CALL has been removed).
  38  * *file is the name of the file, which might not exist and may not have the
  39  * .BAT suffix on. Called is 1 for a CALL, 0 otherwise.
  40  *
  41  * We need to handle recursion correctly, since one batch program might call another.
  42  * So parameters for this batch file are held in a BATCH_CONTEXT structure.
  43  */
  44
  45 void WCMD_batch (char *file, char *command, int called) {
  46
  47 #define WCMD_BATCH_EXT_SIZE 5
  48
  49 HANDLE h = INVALID_HANDLE_VALUE;
  50 char string[MAXSTRING];
  51 char extension[][WCMD_BATCH_EXT_SIZE] = {".bat",".cmd"};
  52 int  i;
  53 BATCH_CONTEXT *prev_context;
  54
  55   for(i=0; (i<(sizeof(extension)/WCMD_BATCH_EXT_SIZE)) &&
  56            (h == INVALID_HANDLE_VALUE); i++) {
  57   strcpy (string, file);
  58   CharLower (string);
  59     if (strstr (string, extension[i]) == NULL) strcat (string, extension[i]);
  60   h = CreateFile (string, GENERIC_READ, FILE_SHARE_READ,
  61                   NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
  62   }
  63   if (h == INVALID_HANDLE_VALUE) {
  64     SetLastError (ERROR_FILE_NOT_FOUND);
  65     WCMD_print_error ();
  66     return;
  67   }
  68
  69 /*
  70  *      Create a context structure for this batch file.
  71  */
  72
  73   prev_context = context;
  74   context = (BATCH_CONTEXT *)LocalAlloc (LMEM_FIXED, sizeof (BATCH_CONTEXT));
  75   context -> h = h;
  76   context -> command = command;
  77   context -> shift_count = 0;
  78   context -> prev_context = prev_context;
  79
  80 /*
  81  *      Work through the file line by line. Specific batch commands are processed here,
  82  *      the rest are handled by the main command processor.
  83  */
  84
  85   while (WCMD_fgets (string, sizeof(string), h)) {
  86     if (strlen(string) == MAXSTRING -1)
  87       WCMD_output("Line in Batch processing possible truncated. Using:\n%s\n",string);
  88     if (string[0] != ':') {                      /* Skip over labels */
  89       WCMD_batch_command (string);
  90     }
  91   }
  92   CloseHandle (h);
  93
  94 /*
  95  *      If invoked by a CALL, we return to the context of our caller. Otherwise return
  96  *      to the caller's caller.
  97  */
  98
  99   LocalFree ((HANDLE)context);
 100   if ((prev_context != NULL) && (!called)) {
 101     CloseHandle (prev_context -> h);
 102     context = prev_context -> prev_context;
 103     LocalFree ((HANDLE)prev_context);
 104   }
 105   else {
 106     context = prev_context;
 107   }
 108 }
 109
 110 /****************************************************************************
 111  * WCMD_batch_command
 112  *
 113  * Execute one line from a batch file, expanding parameters.
 114  */
 115
 116 void WCMD_batch_command (char *line) {
 117
 118 DWORD status;
 119 char cmd1[MAXSTRING],cmd2[MAXSTRING];
 120 char *p, *s, *t;
 121 int i;
 122
 123   /* Get working version of command line */
 124   strcpy(cmd1, line);
 125
 126   /* Expand environment variables in a batch file %{0-9} first  */
 127   /*   Then env vars, and if any left (ie use of undefined vars,*/
 128   /*   replace with spaces                                      */
 129   /* FIXME: Winnt would replace %1%fred%1 with first parm, then */
 130   /*   contents of fred, then the digit 1. Would need to remove */
 131   /*   ExpandEnvStrings to achieve this                         */
 132
 133   /* Replace use of %0...%9 */
 134   p = cmd1;
 135   while ((p = strchr(p, '%'))) {
 136     i = *(p+1) - '0';
 137     if ((i >= 0) && (i <= 9)) {
 138       s = strdup (p+2);
 139       t = WCMD_parameter (context -> command, i + context -> shift_count, NULL);
 140       strcpy (p, t);
 141       strcat (p, s);
 142       free (s);
 143     } else {
 144       p++;
 145     }
 146   }
 147
 148   /* Now replace environment variables */
 149   status = ExpandEnvironmentStrings(cmd1, cmd2, sizeof(cmd2));
 150   if (!status) {
 151     WCMD_print_error ();
 152     return;
 153   }
 154
 155   /* In a batch program, unknown variables are replace by nothing */
 156   /* so remove any remaining %var%                                */
 157   p = cmd2;
 158   while ((p = strchr(p, '%'))) {
 159     s = strchr(p+1, '%');
 160     if (!s) {
 161       *p=0x00;
 162     } else {
 163       t = strdup(s+1);
 164       strcpy(p, t);
 165       free(t);
 166     }
 167   }
 168
 169   /* Show prompt before batch line IF echo is on */
 170   if (echo_mode && (line[0] != '@')) {
 171     WCMD_show_prompt();
 172     WCMD_output ("%s\n", cmd2);
 173   }
 174
 175   WCMD_process_command (cmd2);
 176 }
 177
 178 /*******************************************************************
 179  * WCMD_parameter - extract a parameter from a command line.
 180  *
 181  *      Returns the 'n'th space-delimited parameter on the command line (zero-based).
 182  *      Parameter is in static storage overwritten on the next call.
 183  *      Parameters in quotes (and brackets) are handled.
 184  *      Also returns a pointer to the location of the parameter in the command line.
 185  */
 186
 187 char *WCMD_parameter (char *s, int n, char **where) {
 188
 189 int i = 0;
 190 static char param[MAX_PATH];
 191 char *p;
 192
 193   p = param;
 194   while (TRUE) {
 195     switch (*s) {
 196       case ' ':
 197         s++;
 198         break;
 199       case '"':
 200         if (where != NULL) *where = s;
 201         s++;
 202         while ((*s != '\0') && (*s != '"')) {
 203           *p++ = *s++;
 204         }
 205         if (i == n) {
 206           *p = '\0';
 207           return param;
 208         }
 209         if (*s == '"') s++;
 210           param[0] = '\0';
 211           i++;
 212         p = param;
 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 '\0':
 230         return param;
 231       default:
 232         if (where != NULL) *where = s;
 233         while ((*s != '\0') && (*s != ' ')) {
 234           *p++ = *s++;
 235         }
 236         if (i == n) {
 237           *p = '\0';
 238           return param;
 239         }
 240           param[0] = '\0';
 241           i++;
 242         p = param;
 243     }
 244   }
 245 }
 246
 247 /****************************************************************************
 248  * WCMD_fgets
 249  *
 250  * Get one line from a batch file. We can't use the native f* functions because
 251  * of the filename syntax differences between DOS and Unix. Also need to lose
 252  * the LF (or CRLF) from the line.
 253  */
 254
 255 char *WCMD_fgets (char *s, int n, HANDLE h) {
 256
 257 DWORD bytes;
 258 BOOL status;
 259 char *p;
 260
 261   p = s;
 262   do {
 263     status = ReadFile (h, s, 1, &bytes, NULL);
 264     if ((status == 0) || ((bytes == 0) && (s == p))) return NULL;
 265     if (*s == '\n') bytes = 0;
 266     else if (*s != '\r') {
 267       s++;
 268       n--;
 269     }
 270     *s = '\0';
 271   } while ((bytes == 1) && (n > 1));
 272   return p;
 273 }