int main(VOID) {
HFILE hfFileHandle = 0L; /* Handle for file being manipulated */
ULONG ulAction = 0; /* Action taken by DosOpen */
FHLOCK FileHandleLock = 0; /* File handle lock */
ULONG ulWrote = 0; /* Number of bytes written by DosWrite */
UCHAR uchFileName[20] = "dospman.dat", /* Name of file */
uchFileData[4] = "DATA"; /* Data to write to file */
APIRET rc = NO_ERROR; /* Return code */
/* Open the file dosman.dat. Use an existing file or create a new */
/* one if it doesn't exist. */
rc = DosProtectOpen(uchFileName, &hfFileHandle, &ulAction, 4L,
FILE_ARCHIVED | FILE_NORMAL,
OPEN_ACTION_CREATE_IF_NEW | OPEN_ACTION_OPEN_IF_EXISTS,
OPEN_FLAGS_NOINHERIT | OPEN_SHARE_DENYNONE |
OPEN_ACCESS_READWRITE, 0L, &FileHandleLock);
if (rc != NO_ERROR) {
printf("DosOpen error: return code = %u\n", rc);
return 1;
}
rc = DosProtectWrite (hfFileHandle, (PVOID) uchFileData,
sizeof (uchFileData), &ulWrote, FileHandleLock);
if (rc != NO_ERROR) {
printf("DosWrite error: return code = %u\n", rc);
return 1;
}
rc = DosResetBuffer (hfFileHandle);
if (rc != NO_ERROR) {
printf("DosResetBuffer error: return code = %u\n", rc);
return 1;
} /* endif */
rc = DosProtectSetFileSize (hfFileHandle, 8L, FileHandleLock);
if (rc != NO_ERROR) {
printf("DosSetFileSize error: return code = %u\n", rc);
return 1;
}
return NO_ERROR;
}
int main(VOID) {
UCHAR uchFileName[] = "DOSFDEL.DAT"; /* File we want to delete */
HFILE fhDelFile = 0; /* File handle from DosOpen */
FILESTATUS3 fsts3FileInfo = {{0}}; /* Information associated with file */
ULONG ulBufferSize = sizeof(FILESTATUS3); /* File info buffer size */
ULONG ulOpenAction = 0; /* Action taken by DosOpen */
APIRET rc = NO_ERROR; /* Return code */
FHLOCK FHLock = 0; /* File handle lock */
/* Create a read-only file */
rc = DosProtectOpen(uchFileName, &fhDelFile,
&ulOpenAction, 10L, FILE_READONLY,
OPEN_ACTION_CREATE_IF_NEW | OPEN_ACTION_OPEN_IF_EXISTS,
OPEN_ACCESS_READWRITE | OPEN_SHARE_DENYNONE, 0L, &FHLock);
if (rc != NO_ERROR) {
printf("DosProtectOpen error: return code = %u\n", rc);
return 1;
}
rc = DosProtectQueryFileInfo(fhDelFile, FIL_STANDARD,
&fsts3FileInfo, ulBufferSize, FHLock); /* Get standard info */
if (rc != NO_ERROR) {
printf("DosProtectQueryFileInfo error: return code = %u\n", rc);
return 1;
} else { printf("File %s created read-only.\n",uchFileName); }
/* Change the file attributes to be "normal" */
fsts3FileInfo.attrFile = FILE_NORMAL;
rc = DosProtectSetFileInfo(fhDelFile, FIL_STANDARD,
&fsts3FileInfo, ulBufferSize, FHLock);
if (rc != NO_ERROR) {
printf("DosProtectSetFileInfo error: return code = %u\n", rc);
return 1;
}
rc = DosProtectClose(fhDelFile, FHLock);
/* Should verify that (rc != NO_ERROR) here... */
/* Delete the file */
rc = DosForceDelete(uchFileName);
if (rc != NO_ERROR) {
printf("DosForceDelete error: return code = %u\n", rc);
return 1;
} else {
printf("File %s has been deleted.\n",uchFileName);
} /* endif */
return NO_ERROR;
}
