int exec(const char *cmd, char *cmdLine, const unsigned segOfEnv)
{
#ifdef FEATURE_XMS_SWAP
# define buf dosCMDTAIL
# define memcpy _fmemcpy
#else
unsigned char buf[128];
#endif
struct fcb fcb1,
fcb2;
struct ExecBlock execBlock;
int retval;
assert(cmd);
assert(cmdLine);
assert(strlen(cmdLine) <= 125);
invalidateNLSbuf();
/* generate Pascal string from the command line */
memcpy(&buf[1], cmdLine, buf[0] = strlen(cmdLine));
memcpy(&buf[1] + buf[0], "\xd", 2);
/* fill FCBs */
if ((cmdLine = parsfnm(cmdLine, &fcb1, 1)) != 0)
parsfnm(cmdLine, &fcb2, 1);
saveSession();
#ifdef FEATURE_XMS_SWAP
if(XMSisactive() && swapOnExec == TRUE) {
/* Copy the prepared values into the buffers in CSWAP.ASM module */
_fmemcpy(dosFCB1, &fcb1, sizeof(fcb1));
_fmemcpy(dosFCB2, &fcb2, sizeof(fcb1));
assert(strlen(cmd) < 128);
_fstrcpy(dosCMDNAME, cmd);
dosParamDosExec.envSeg = segOfEnv;
retval = XMSexec();
} else
#endif
{
/* fill execute structure */
execBlock.segOfEnv = segOfEnv;
execBlock.cmdLine = (char far *)buf;
execBlock.fcb1 = (struct fcb far *)&fcb1;
execBlock.fcb2 = (struct fcb far *)&fcb2;
retval = lowLevelExec((char far*)cmd, (struct ExecBlock far*)&execBlock);
}
restoreSession();
return decode_exec_result(retval);
}
int DriveExists(unsigned char drive)
{
struct fcb fcb;
char a[20] = " :foo.oof";
a[0]=drive+64;
return (int)(parsfnm(a,&fcb,1));
}
