/*
* Grab the filename of COMMAND.COM
*
* If warn != 0, warnings can be issued; otherwise this functions
* is silent.
*/
void grabComFilename(int warn, char far *fnam)
{
char *buf;
size_t len;
assert(fnam);
/* Copy the filename into the local heap */
len = _fstrlen(fnam);
if(len >= INT_MAX || len < 1) {
/* no filename specified */
if(warn)
error_syntax(NULL);
return;
}
if((buf = malloc(len + 1)) == NULL) {
if(warn) error_out_of_memory();
return ;
}
_fmemcpy((char far*)buf, fnam, len);
buf[len] = '\0';
if (buf[1] != ':' || buf[2] != '\\')
{ char *p;
/* expand the string for the user */
p = dfnexpand(buf, NULL);
free(buf);
if((buf = p) == NULL) {
if(warn) error_out_of_memory();
return;
}
if(warn)
error_init_fully_qualified(buf);
}
if(dfnstat(buf) & DFN_DIRECTORY) {
/* The user specified a directory, try if we can find the
COMMAND.COM with the standard name in there */
char *p;
if((p = realloc(buf, len + sizeof(COM_NAME) + 1)) == NULL) {
if(warn) error_out_of_memory();
free(buf);
return;
}
buf = p;
strcpy(&buf[len], "\\" COM_NAME);
}
if(!(dfnstat(buf) & DFN_FILE)) {
/* not found */
if(warn) error_open_file(buf);
free(buf);
return;
}
free(ComPath); /* Save the found file */
ComPath = buf;
}
int grabComFilename(const int warn, const char far * const fnam)
{
char *buf;
size_t len;
int rc;
dprintf( ("[INIT: grabComFilename(%s)]\n", fnam) );
if(!fnam)
return 4;
/* Copy the filename into the local heap */
len = _fstrlen(fnam);
if(len >= INT_MAX || len < 1) {
/* no filename specified */
if(warn)
error_syntax(0);
return 4;
}
if((buf = malloc(len + 1)) == 0) {
if(warn) error_out_of_memory();
return 4;
}
_fmemcpy((char far*)buf, fnam, len);
buf[len] = '\0';
if (buf[1] != ':' || buf[2] != '\\')
{ char *p;
/* expand the string for the user */
p = abspath(buf, warn);
free(buf);
if((buf = p) == 0)
return 4;
if(warn)
error_init_fully_qualified(buf);
len = strlen(buf);
}
while(buf[len - 1] == '\\')
--len;
buf[len] = 0;
if(dfnstat(buf) & DFN_DIRECTORY) {
/* The user specified a directory, try if we can find the
COMMAND.COM with the standard name in there */
char *p;
if((p = realloc(buf, len + sizeof(COM_NAME) + 1)) == 0) {
if(warn) error_out_of_memory();
free(buf);
return 4;
}
buf = p;
strcpy(&buf[len], "\\" COM_NAME);
}
if(0 != (rc = validResFile(buf))) {
if(warn) switch(rc) {
default:
#ifdef NDEBUG
assert(0);
#endif
case 1:
error_open_file(buf);
break;
case 2:
error_fcom_is_device(buf);
break;
case 3:
error_fcom_invalid(buf);
break;
}
free(buf);
return rc;
}
free(ComPath); /* Save the found file */
ComPath = buf;
dprintf(("[INIT: new resource file name: %s]\n", ComPath));
isSwapFile = 0;
buf = dfnfilename(ComPath);
assert(buf);
if((buf = strchr(buf, '.')) != 0
&& stricmp(buf, ".swp") == 0) {
dprintf(("[INIT: VSpawn file found: %s]\n", ComPath));
memcpy(++buf, "COM", 3);
isSwapFile = buf - ComPath;
}
return 0;
}