programs/wcmd/batch.c

   1 /*
   2  * WCMD - Wine-compatible command line interface - batch interface.
   3  *
   4  * (C) 1999 D A Pickles
   5  *
   6  */
   7
   8
   9 #include "wcmd.h"
  10
  11 void WCMD_batch_command (char *line);
  12
  13 extern char nyi[];
  14 extern char newline[];
  15 extern char version_string[];
  16 extern int echo_mode;
  17 extern char quals[MAX_PATH], param1[MAX_PATH], param2[MAX_PATH];
  18 extern BATCH_CONTEXT *context;
  19
  20
  21
  22 /****************************************************************************
  23  * WCMD_batch
  24  *
  25  * Open and execute a batch file.
  26  * On entry *command includes the complete command line beginning with the name
  27  * of the batch file (if a CALL command was entered the CALL has been removed).
  28  * *file is the name of the file, which might not exist and may not have the
  29  * .BAT suffix on. Called is 1 for a CALL, 0 otherwise.
  30  *
  31  * We need to handle recursion correctly, since one batch program might call another.
  32  * So parameters for this batch file are held in a BATCH_CONTEXT structure.
  33  */
  34
  35 void WCMD_batch (char *file, char *command, int called) {
  36
  37 HANDLE h;
  38 char string[MAX_PATH];
  39 BATCH_CONTEXT *prev_context;
  40
  41   strcpy (string, file);
  42   CharLower (string);
  43   if (strstr (string, ".bat") == NULL) strcat (string, ".bat");
  44   h = CreateFile (string, GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
  45   if (h == INVALID_HANDLE_VALUE) {
  46     WCMD_output ("File %s not found\n", string);
  47     return;
  48   }
  49
  50 /*
  51  *      Create a context structure for this batch file.
  52  */
  53
  54   prev_context = context;
  55   context = (BATCH_CONTEXT *)LocalAlloc (LMEM_FIXED, sizeof (BATCH_CONTEXT));
  56   context -> h = h;
  57   context -> command = command;
  58   context -> shift_count = 0;
  59   context -> prev_context = prev_context;
  60
  61 /*
  62  *      Work through the file line by line. Specific batch commands are processed here,
  63  *      the rest are handled by the main command processor.
  64  */
  65
  66   while (WCMD_fgets (string, sizeof(string), h)) {
  67     if (string[0] != ':') {                      /* Skip over labels */
  68       WCMD_batch_command (string);
  69     }
  70   }
  71   CloseHandle (h);
  72
  73 /*
  74  *      If invoked by a CALL, we return to the context of our caller. Otherwise return
  75  *      to the caller's caller.
  76  */
  77
  78   LocalFree ((HANDLE)context);
  79   if ((prev_context != NULL) && (!called)) {
  80     CloseHandle (prev_context -> h);
  81     context = prev_context -> prev_context;
  82     LocalFree ((HANDLE)prev_context);
  83   }
  84   else {
  85     context = prev_context;
  86   }
  87 }
  88
  89 /****************************************************************************
  90  * WCMD_batch_command
  91  *
  92  * Execute one line from a batch file, expanding parameters.
  93  */
  94
  95 void WCMD_batch_command (char *line) {
  96
  97 DWORD status;
  98 char cmd1[1024],cmd2[1024];
  99 char *p, *s, *t;
 100 int i;
 101
 102   /* Get working version of command line */
 103   strcpy(cmd1, line);
 104
 105   /* Expand environment variables in a batch file %{0-9} first  */
 106   /*   Then env vars, and if any left (ie use of undefined vars,*/
 107   /*   replace with spaces                                      */
 108   /* FIXME: Winnt would replace %1%fred%1 with first parm, then */
 109   /*   contents of fred, then the digit 1. Would need to remove */
 110   /*   ExpandEnvStrings to achieve this                         */
 111
 112   /* Replace use of %0...%9 */
 113   p = cmd1;
 114   while ((p = strchr(p, '%'))) {
 115     i = *(p+1) - '0';
 116     if ((i >= 0) && (i <= 9)) {
 117       s = strdup (p+2);
 118       t = WCMD_parameter (context -> command, i + context -> shift_count, NULL);
 119       strcpy (p, t);
 120       strcat (p, s);
 121       free (s);
 122     } else {
 123       p++;
 124     }
 125   }
 126
 127   /* Now replace environment variables */
 128   status = ExpandEnvironmentStrings(cmd1, cmd2, sizeof(cmd2));
 129   if (!status) {
 130     WCMD_print_error ();
 131     return;
 132   }
 133
 134   /* In a batch program, unknown variables are replace by nothing */
 135   /* so remove any remaining %var%                                */
 136   p = cmd2;
 137   while ((p = strchr(p, '%'))) {
 138     s = strchr(p+1, '%');
 139     if (!s) {
 140       *p=0x00;
 141     } else {
 142       t = strdup(s+1);
 143       strcpy(p, t);
 144       free(t);
 145     }
 146   }
 147
 148   /* Show prompt before batch line IF echo is on */
 149   if (echo_mode && (line[0] != '@')) {
 150     WCMD_show_prompt();
 151     WCMD_output ("%s\n", cmd2);
 152   }
 153
 154   WCMD_process_command (cmd2);
 155 }
 156
 157 /*******************************************************************
 158  * WCMD_parameter - extract a parameter from a command line.
 159  *
 160  *      Returns the 'n'th space-delimited parameter on the command line (zero-based).
 161  *      Parameter is in static storage overwritten on the next call.
 162  *      Parameters in quotes (and brackets) are handled.
 163  *      Also returns a pointer to the location of the parameter in the command line.
 164  */
 165
 166 char *WCMD_parameter (char *s, int n, char **where) {
 167
 168 int i = 0;
 169 static char param[MAX_PATH];
 170 char *p;
 171
 172   p = param;
 173   while (TRUE) {
 174     switch (*s) {
 175       case ' ':
 176         s++;
 177         break;
 178       case '"':
 179         if (where != NULL) *where = s;
 180         s++;
 181         while ((*s != '\0') && (*s != '"')) {
 182           *p++ = *s++;
 183         }
 184         if (i == n) {
 185           *p = '\0';
 186           return param;
 187         }
 188         if (*s == '"') s++;
 189           param[0] = '\0';
 190           i++;
 191         p = param;
 192         break;
 193       case '(':
 194         if (where != NULL) *where = s;
 195         s++;
 196         while ((*s != '\0') && (*s != ')')) {
 197           *p++ = *s++;
 198         }
 199         if (i == n) {
 200           *p = '\0';
 201           return param;
 202         }
 203         if (*s == ')') s++;
 204           param[0] = '\0';
 205           i++;
 206         p = param;
 207         break;
 208       case '\0':
 209         return param;
 210       default:
 211         if (where != NULL) *where = s;
 212         while ((*s != '\0') && (*s != ' ')) {
 213           *p++ = *s++;
 214         }
 215         if (i == n) {
 216           *p = '\0';
 217           return param;
 218         }
 219           param[0] = '\0';
 220           i++;
 221         p = param;
 222     }
 223   }
 224 }
 225
 226 /****************************************************************************
 227  * WCMD_fgets
 228  *
 229  * Get one line from a batch file. We can't use the native f* functions because
 230  * of the filename syntax differences between DOS and Unix. Also need to lose
 231  * the LF (or CRLF) from the line.
 232  */
 233
 234 char *WCMD_fgets (char *s, int n, HANDLE h) {
 235
 236 DWORD bytes;
 237 BOOL status;
 238 char *p;
 239
 240   p = s;
 241   do {
 242     status = ReadFile (h, s, 1, &bytes, NULL);
 243     if ((status == 0) || ((bytes == 0) && (s == p))) return NULL;
 244     if (*s == '\n') bytes = 0;
 245     else if (*s != '\r') {
 246       s++;
 247     n--;
 248     }
 249     *s = '\0';
 250   } while ((bytes == 1) && (n > 1));
 251   return p;
 252 }