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 char nyi[];
  26 extern char newline[];
  27 extern char version_string[];
  28 extern int echo_mode;
  29 extern char quals[MAX_PATH], param1[MAX_PATH], param2[MAX_PATH];
  30 extern BATCH_CONTEXT *context;
  31 extern DWORD errorlevel;
  32
  33 #define MAXSTRING 1024
  34
  35 /****************************************************************************
  36  * WCMD_batch
  37  *
  38  * Open and execute a batch file.
  39  * On entry *command includes the complete command line beginning with the name
  40  * of the batch file (if a CALL command was entered the CALL has been removed).
  41  * *file is the name of the file, which might not exist and may not have the
  42  * .BAT suffix on. Called is 1 for a CALL, 0 otherwise.
  43  *
  44  * We need to handle recursion correctly, since one batch program might call another.
  45  * So parameters for this batch file are held in a BATCH_CONTEXT structure.
  46  */
  47
  48 void WCMD_batch (char *file, char *command, int called) {
  49
  50 HANDLE h;
  51 char string[MAXSTRING];
  52 BATCH_CONTEXT *prev_context;
  53
  54   strcpy (string, file);
  55   CharLower (string);
  56   if (strstr (string, ".bat") == NULL) strcat (string, ".bat");
  57   h = CreateFile (string, GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
  58   if (h == INVALID_HANDLE_VALUE) {
  59     SetLastError (ERROR_FILE_NOT_FOUND);
  60     WCMD_print_error ();
  61     return;
  62   }
  63
  64 /*
  65  *      Create a context structure for this batch file.
  66  */
  67
  68   prev_context = context;
  69   context = (BATCH_CONTEXT *)LocalAlloc (LMEM_FIXED, sizeof (BATCH_CONTEXT));
  70   context -> h = h;
  71   context -> command = command;
  72   context -> shift_count = 0;
  73   context -> prev_context = prev_context;
  74
  75 /*
  76  *      Work through the file line by line. Specific batch commands are processed here,
  77  *      the rest are handled by the main command processor.
  78  */
  79
  80   while (WCMD_fgets (string, sizeof(string), h)) {
  81     if (strlen(string) == MAXSTRING -1)
  82       WCMD_output("Line in Batch processing possible truncated. Using:\n%s\n",string);
  83     if (string[0] != ':') {                      /* Skip over labels */
  84       WCMD_batch_command (string);
  85     }
  86   }
  87   CloseHandle (h);
  88
  89 /*
  90  *      If invoked by a CALL, we return to the context of our caller. Otherwise return
  91  *      to the caller's caller.
  92  */
  93
  94   LocalFree ((HANDLE)context);
  95   if ((prev_context != NULL) && (!called)) {
  96     CloseHandle (prev_context -> h);
  97     context = prev_context -> prev_context;
  98     LocalFree ((HANDLE)prev_context);
  99   }
 100   else {
 101     context = prev_context;
 102   }
 103 }
 104
 105 /****************************************************************************
 106  * WCMD_batch_command
 107  *
 108  * Execute one line from a batch file, expanding parameters.
 109  */
 110
 111 void WCMD_batch_command (char *line) {
 112
 113 DWORD status;
 114 char cmd1[MAXSTRING],cmd2[MAXSTRING];
 115 char *p, *s, *t;
 116 int i;
 117
 118   /* Get working version of command line */
 119   strcpy(cmd1, line);
 120
 121   /* Expand environment variables in a batch file %{0-9} first  */
 122   /*   Then env vars, and if any left (ie use of undefined vars,*/
 123   /*   replace with spaces                                      */
 124   /* FIXME: Winnt would replace %1%fred%1 with first parm, then */
 125   /*   contents of fred, then the digit 1. Would need to remove */
 126   /*   ExpandEnvStrings to achieve this                         */
 127
 128   /* Replace use of %0...%9 */
 129   p = cmd1;
 130   while ((p = strchr(p, '%'))) {
 131     i = *(p+1) - '0';
 132     if ((i >= 0) && (i <= 9)) {
 133       s = strdup (p+2);
 134       t = WCMD_parameter (context -> command, i + context -> shift_count, NULL);
 135       strcpy (p, t);
 136       strcat (p, s);
 137       free (s);
 138     } else {
 139       p++;
 140     }
 141   }
 142
 143   /* Now replace environment variables */
 144   status = ExpandEnvironmentStrings(cmd1, cmd2, sizeof(cmd2));
 145   if (!status) {
 146     WCMD_print_error ();
 147     return;
 148   }
 149
 150   /* In a batch program, unknown variables are replace by nothing */
 151   /* so remove any remaining %var%                                */
 152   p = cmd2;
 153   while ((p = strchr(p, '%'))) {
 154     s = strchr(p+1, '%');
 155     if (!s) {
 156       *p=0x00;
 157     } else {
 158       t = strdup(s+1);
 159       strcpy(p, t);
 160       free(t);
 161     }
 162   }
 163
 164   /* Show prompt before batch line IF echo is on */
 165   if (echo_mode && (line[0] != '@')) {
 166     WCMD_show_prompt();
 167     WCMD_output ("%s\n", cmd2);
 168   }
 169
 170   WCMD_process_command (cmd2);
 171 }
 172
 173 /*******************************************************************
 174  * WCMD_parameter - extract a parameter from a command line.
 175  *
 176  *      Returns the 'n'th space-delimited parameter on the command line (zero-based).
 177  *      Parameter is in static storage overwritten on the next call.
 178  *      Parameters in quotes (and brackets) are handled.
 179  *      Also returns a pointer to the location of the parameter in the command line.
 180  */
 181
 182 char *WCMD_parameter (char *s, int n, char **where) {
 183
 184 int i = 0;
 185 static char param[MAX_PATH];
 186 char *p;
 187
 188   p = param;
 189   while (TRUE) {
 190     switch (*s) {
 191       case ' ':
 192         s++;
 193         break;
 194       case '"':
 195         if (where != NULL) *where = s;
 196         s++;
 197         while ((*s != '\0') && (*s != '"')) {
 198           *p++ = *s++;
 199         }
 200         if (i == n) {
 201           *p = '\0';
 202           return param;
 203         }
 204         if (*s == '"') s++;
 205           param[0] = '\0';
 206           i++;
 207         p = param;
 208         break;
 209       case '(':
 210         if (where != NULL) *where = s;
 211         s++;
 212         while ((*s != '\0') && (*s != ')')) {
 213           *p++ = *s++;
 214         }
 215         if (i == n) {
 216           *p = '\0';
 217           return param;
 218         }
 219         if (*s == ')') s++;
 220           param[0] = '\0';
 221           i++;
 222         p = param;
 223         break;
 224       case '\0':
 225         return param;
 226       default:
 227         if (where != NULL) *where = s;
 228         while ((*s != '\0') && (*s != ' ')) {
 229           *p++ = *s++;
 230         }
 231         if (i == n) {
 232           *p = '\0';
 233           return param;
 234         }
 235           param[0] = '\0';
 236           i++;
 237         p = param;
 238     }
 239   }
 240 }
 241
 242 /****************************************************************************
 243  * WCMD_fgets
 244  *
 245  * Get one line from a batch file. We can't use the native f* functions because
 246  * of the filename syntax differences between DOS and Unix. Also need to lose
 247  * the LF (or CRLF) from the line.
 248  */
 249
 250 char *WCMD_fgets (char *s, int n, HANDLE h) {
 251
 252 DWORD bytes;
 253 BOOL status;
 254 char *p;
 255
 256   p = s;
 257   do {
 258     status = ReadFile (h, s, 1, &bytes, NULL);
 259     if ((status == 0) || ((bytes == 0) && (s == p))) return NULL;
 260     if (*s == '\n') bytes = 0;
 261     else if (*s != '\r') {
 262       s++;
 263       n--;
 264     }
 265     *s = '\0';
 266   } while ((bytes == 1) && (n > 1));
 267   return p;
 268 }