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- /* --------------------------------- -------
- * |\ | | | | | |.| | \| |/ /|\ |||||||
- * | | | |/ | |\ |/ |/| |\ |/ | ? ---+--- =<
- * | | | | | | | | | | | \qqqqqqqqq/
- * --------------------------------- ~~~~~~~~~~~~~~~~
- * TestBits - tests whether one or more protection flags are set.
- * Copyright (C) 1993 Torsten Poulin
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * The author can be contacted by s-mail at
- * Torsten Poulin
- * Banebrinken 99, 2, 77
- * DK-2400 Copenhagen NV
- * DENMARK
- *
- * $Id: TestBits.c,v 37.1 93/03/11 17:33:47 Torsten Rel $
- * $Log: TestBits.c,v $
- * Revision 37.1 93/03/11 17:33:47 Torsten
- * Initial revision.
- *
- */
-
- #include <exec/types.h>
- #include <exec/memory.h>
- #include <dos/dos.h>
- #include <dos/dosasl.h>
- #include <clib/dos_protos.h>
- #include <clib/exec_protos.h>
- #ifdef __SASC
- #include <pragmas/dos_pragmas.h>
- #include <pragmas/exec_pragmas.h>
- #endif
- #include "tastlib.h"
- #include "testbits_rev.h"
-
- #define PROGNAME "TestBits"
- #define TEMPLATE "NAME/A,FLAGS/A"
- #define OPT_NAME 0
- #define OPT_FLAGS 1
-
- char const versionID[] = VERSTAG;
- char const copyright[] = "$COPYRIGHT:Copyright © 1993 Torsten Poulin$";
-
- typedef struct {
- struct DosLibrary *DOSBase;
- struct FileInfoBlock fib;
- } Global;
-
- LONG setbit(UBYTE c, LONG *mask, Global *global);
- LONG matchflags(UBYTE *name, UBYTE *flags, Global *global);
-
-
- LONG entrypoint(VOID)
- {
- struct DosLibrary *DOSBase;
- struct RDArgs *args;
- Global *global;
- LONG arg[2];
- LONG rc = RETURN_OK;
-
- if (!(DOSBase = (struct DosLibrary *) OpenLibrary("dos.library", 37L)))
- return RETURN_FAIL;
-
- if (!(global = AllocVec(sizeof(Global), MEMF_PUBLIC | MEMF_CLEAR)))
- rc = ERROR_NO_FREE_STORE;
- else
- {
- global->DOSBase = DOSBase;
-
- arg[OPT_NAME] = arg[OPT_FLAGS] = 0L;
-
- if (!(args = ReadArgs(TEMPLATE, arg, NULL)))
- rc = RETURN_ERROR;
- else
- {
- rc = matchflags((UBYTE *) arg[OPT_NAME],
- (UBYTE *) arg[OPT_FLAGS], global);
- FreeArgs(args);
- }
- FreeVec(global);
- }
- rc = printErrorMsg(rc, PROGNAME, DOSBase);
- CloseLibrary((struct Library *) DOSBase);
- return rc;
- }
-
-
- LONG matchflags(UBYTE *name, UBYTE *flags, Global *global)
- {
- struct DosLibrary *DOSBase = global->DOSBase;
- LONG setmask = 0L;
- LONG unsetmask = 0L;
- LONG bits = 0L;
- BPTR lock;
- LONG rc = RETURN_OK;
-
- for (; *flags; flags++)
- {
- if (*flags == '-')
- {
- if (*++flags)
- rc = setbit(*flags, &unsetmask, global);
- /* Silently ignore a trailing '-' */
- }
- else
- rc = setbit(*flags, &setmask, global);
- }
-
- if (rc == RETURN_OK)
- {
- if (setmask & unsetmask)
- {
- MyPrintf(global, "%s: Ambiguous flag specification\n", PROGNAME);
- rc = RETURN_ERROR;
- }
- else
- {
- if (!(lock = Lock(name, SHARED_LOCK)))
- rc = RETURN_ERROR;
- else
- {
- if (!Examine(lock, &global->fib))
- {
- MyPrintf(global, "%s: Cannot examine \"%s\"\n", PROGNAME, name);
- rc = RETURN_ERROR;
- }
- else
- {
- bits = global->fib.fib_Protection;
- /* Flip the lower 4 bits and get rid of the higher 24... */
- bits = (~bits & 0x0000000f) | (bits & 0x000000f0);
- rc = ((bits & setmask) == setmask && (bits & unsetmask) == 0L
- ? RETURN_OK
- : RETURN_WARN);
- }
- UnLock(lock);
- }
- }
- }
- return rc;
- }
-
-
- LONG setbit(UBYTE c, LONG *mask, Global *global)
- {
- c |= 0x20; /* to lower case (ought to be: c = tolower(c); */
- switch (c)
- {
- case 's': *mask |= FIBF_SCRIPT; break;
- case 'p': *mask |= FIBF_PURE; break;
- case 'a': *mask |= FIBF_ARCHIVE; break;
- case 'r': *mask |= FIBF_READ; break;
- case 'w': *mask |= FIBF_WRITE; break;
- case 'e': *mask |= FIBF_EXECUTE; break;
- case 'd': *mask |= FIBF_DELETE; break;
- default:
- MyPrintf(global, "%s: Unknown protection flag\n", PROGNAME);
- return RETURN_ERROR;
- }
- return RETURN_OK;
- }
-