Sweden-Number/programs/cmd/batch.c

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/*
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* CMD - Wine-compatible command line interface - batch interface.
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*
* Copyright (C) 1999 D A Pickles
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*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
#include "wcmd.h"
void WCMD_batch_command (char *line);
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extern int echo_mode;
extern char quals[MAX_PATH], param1[MAX_PATH], param2[MAX_PATH];
extern BATCH_CONTEXT *context;
extern DWORD errorlevel;
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/* msdn specified max for Win XP */
#define MAXSTRING 8192
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/****************************************************************************
* WCMD_batch
*
* Open and execute a batch file.
* On entry *command includes the complete command line beginning with the name
* of the batch file (if a CALL command was entered the CALL has been removed).
* *file is the name of the file, which might not exist and may not have the
* .BAT suffix on. Called is 1 for a CALL, 0 otherwise.
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*
* We need to handle recursion correctly, since one batch program might call another.
* So parameters for this batch file are held in a BATCH_CONTEXT structure.
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*/
void WCMD_batch (char *file, char *command, int called) {
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#define WCMD_BATCH_EXT_SIZE 5
HANDLE h = INVALID_HANDLE_VALUE;
char string[MAXSTRING];
char extension_batch[][WCMD_BATCH_EXT_SIZE] = {".bat",".cmd"};
char extension_exe[WCMD_BATCH_EXT_SIZE] = ".exe";
unsigned int i;
BATCH_CONTEXT *prev_context;
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for(i=0; (i<(sizeof(extension_batch)/WCMD_BATCH_EXT_SIZE)) &&
(h == INVALID_HANDLE_VALUE); i++) {
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strcpy (string, file);
CharLower (string);
if (strstr (string, extension_batch[i]) == NULL) strcat (string, extension_batch[i]);
h = CreateFile (string, GENERIC_READ, FILE_SHARE_READ,
NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
}
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if (h == INVALID_HANDLE_VALUE) {
strcpy (string, file);
CharLower (string);
if (strstr (string, extension_exe) == NULL) strcat (string, extension_exe);
h = CreateFile (string, GENERIC_READ, FILE_SHARE_READ,
NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (h != INVALID_HANDLE_VALUE) {
WCMD_run_program (command, 0);
} else {
SetLastError (ERROR_FILE_NOT_FOUND);
WCMD_print_error ();
}
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return;
}
/*
* Create a context structure for this batch file.
*/
prev_context = context;
context = (BATCH_CONTEXT *)LocalAlloc (LMEM_FIXED, sizeof (BATCH_CONTEXT));
context -> h = h;
context -> command = command;
context -> shift_count = 0;
context -> prev_context = prev_context;
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/*
* Work through the file line by line. Specific batch commands are processed here,
* the rest are handled by the main command processor.
*/
while (WCMD_fgets (string, sizeof(string), h)) {
if (strlen(string) == MAXSTRING -1) {
WCMD_output_asis( "Line in Batch processing possibly truncated. Using:\n");
WCMD_output_asis( string);
WCMD_output_asis( "\n");
}
if (string[0] != ':') { /* Skip over labels */
WCMD_batch_command (string);
}
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}
CloseHandle (h);
/*
* If invoked by a CALL, we return to the context of our caller. Otherwise return
* to the caller's caller.
*/
LocalFree ((HANDLE)context);
if ((prev_context != NULL) && (!called)) {
CloseHandle (prev_context -> h);
context = prev_context -> prev_context;
LocalFree ((HANDLE)prev_context);
}
else {
context = prev_context;
}
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}
/****************************************************************************
* WCMD_batch_command
*
* Execute one line from a batch file, expanding parameters.
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*/
void WCMD_batch_command (char *line) {
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DWORD status;
char cmd1[MAXSTRING],cmd2[MAXSTRING];
char *p, *s, *t;
int i;
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/* Get working version of command line */
strcpy(cmd1, line);
/* Expand environment variables in a batch file %{0-9} first */
/* Then env vars, and if any left (ie use of undefined vars,*/
/* replace with spaces */
/* FIXME: Winnt would replace %1%fred%1 with first parm, then */
/* contents of fred, then the digit 1. Would need to remove */
/* ExpandEnvStrings to achieve this */
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/* Replace use of %0...%9 */
p = cmd1;
while ((p = strchr(p, '%'))) {
i = *(p+1) - '0';
if ((i >= 0) && (i <= 9)) {
s = strdup (p+2);
t = WCMD_parameter (context -> command, i + context -> shift_count, NULL);
strcpy (p, t);
strcat (p, s);
free (s);
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} else {
p++;
}
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}
/* Now replace environment variables */
status = ExpandEnvironmentStrings(cmd1, cmd2, sizeof(cmd2));
if (!status) {
WCMD_print_error ();
return;
}
/* In a batch program, unknown variables are replace by nothing */
/* so remove any remaining %var% */
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p = cmd2;
while ((p = strchr(p, '%'))) {
s = strchr(p+1, '%');
if (!s) {
*p=0x00;
} else {
t = strdup(s+1);
strcpy(p, t);
free(t);
}
}
/* Show prompt before batch line IF echo is on */
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if (echo_mode && (line[0] != '@')) {
WCMD_show_prompt();
WCMD_output_asis ( cmd2);
WCMD_output_asis ( "\n");
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}
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WCMD_process_command (cmd2);
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}
/*******************************************************************
* WCMD_parameter - extract a parameter from a command line.
*
* Returns the 'n'th space-delimited parameter on the command line (zero-based).
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* Parameter is in static storage overwritten on the next call.
* Parameters in quotes (and brackets) are handled.
* Also returns a pointer to the location of the parameter in the command line.
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*/
char *WCMD_parameter (char *s, int n, char **where) {
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int i = 0;
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static char param[MAX_PATH];
char *p;
p = param;
while (TRUE) {
switch (*s) {
case ' ':
s++;
break;
case '"':
if (where != NULL) *where = s;
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s++;
while ((*s != '\0') && (*s != '"')) {
*p++ = *s++;
}
if (i == n) {
*p = '\0';
return param;
}
if (*s == '"') s++;
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param[0] = '\0';
i++;
p = param;
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break;
case '(':
if (where != NULL) *where = s;
s++;
while ((*s != '\0') && (*s != ')')) {
*p++ = *s++;
}
if (i == n) {
*p = '\0';
return param;
}
if (*s == ')') s++;
param[0] = '\0';
i++;
p = param;
break;
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case '\0':
return param;
default:
if (where != NULL) *where = s;
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while ((*s != '\0') && (*s != ' ')) {
*p++ = *s++;
}
if (i == n) {
*p = '\0';
return param;
}
param[0] = '\0';
i++;
p = param;
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}
}
}
/****************************************************************************
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* WCMD_fgets
*
* Get one line from a batch file. We can't use the native f* functions because
* of the filename syntax differences between DOS and Unix. Also need to lose
* the LF (or CRLF) from the line.
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*/
char *WCMD_fgets (char *s, int n, HANDLE h) {
DWORD bytes;
BOOL status;
char *p;
p = s;
do {
status = ReadFile (h, s, 1, &bytes, NULL);
if ((status == 0) || ((bytes == 0) && (s == p))) return NULL;
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if (*s == '\n') bytes = 0;
else if (*s != '\r') {
s++;
n--;
}
*s = '\0';
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} while ((bytes == 1) && (n > 1));
return p;
}