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mateuszvis |
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/* This file is part of the SvarCOM project and is published under the terms
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* of the MIT license.
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*
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* Copyright (C) 2021 Mateusz Viste
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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mateuszvis |
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/*
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* del/erase
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*/
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static int cmd_del(struct cmd_funcparam *p) {
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const char *delspec = NULL;
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unsigned short err = 0;
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unsigned short confirmflag = 0;
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unsigned short i;
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unsigned short pathlimit = 0;
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char *buff = p->BUFFER;
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struct DTA *dta = (void *)0x80; /* use the default DTA at location 80h in PSP */
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char *fname = dta->fname;
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if (cmd_ishlp(p)) {
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outputnl("Deletes one or more files.");
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outputnl("");
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outputnl("DEL [drive:][path]filename [/P]");
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outputnl("ERASE [drive:][path]filename [/P]");
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outputnl("");
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outputnl("[drive:][path]filename Specifies the file(s) to delete.");
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outputnl("/P Prompts for confirmation before deleting each file.");
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return(-1);
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}
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if (p->argc == 0) {
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outputnl("Required parameter missing");
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return(-1);
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}
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/* scan argv for delspec and possible /p or /v */
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for (i = 0; i < p->argc; i++) {
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/* delspec? */
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if (p->argv[i][0] == '/') {
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if (imatch(p->argv[i], "/p")) {
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confirmflag = 1;
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} else {
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output("Invalid switch:");
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output(" ");
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outputnl(p->argv[i]);
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return(-1);
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}
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} else if (delspec != NULL) { /* otherwise its a delspec */
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outputnl("Too many parameters");
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return(-1);
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} else {
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delspec = p->argv[i];
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}
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}
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/* convert path to canonical form */
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file_truename(delspec, buff);
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/* is delspec pointing at a directory? if so, add a \*.* */
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{ int attr = file_getattr(delspec);
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if ((attr > 0) && (attr & DOS_ATTR_DIR)) strcat(buff, "\\????????.???");
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}
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/* parse delspec in buff and remember where last backslash or slash is */
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for (i = 0; buff[i] != 0; i++) if (buff[i] == '\\') pathlimit = i + 1;
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/* is this about deleting all content inside a directory? if no per-file
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* confirmation set, ask for a global confirmation */
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if ((confirmflag == 0) && (imatch(buff + pathlimit, "????????.???"))) {
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outputnl("All files in directory will be deleted!");
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if (askchoice("Are you sure (Y/N)?", "YN") != 0) return(-1);
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}
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for (i = 0;; i = 1) {
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/* exec FindFirst or FindNext */
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if (i == 0) {
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err = findfirst(dta, buff, DOS_ATTR_RO | DOS_ATTR_SYS | DOS_ATTR_HID);
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} else {
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err = findnext(dta);
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}
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if (err != 0) break;
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/* ask if confirmation required: PLIK.TXT Delete (Y/N)? */
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if (confirmflag) {
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strcpy(buff + pathlimit, fname); /* note: buff contained the search pattern but it no longer needed so I can reuse it now */
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output(buff);
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output(" \t");
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if (askchoice("Delete (Y/N)?", "YN") != 0) continue;
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}
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/* del found file */
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_asm {
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mov ah, 0x41 /* delete a file, DS:DX points to an ASCIIZ filespec (no wildcards allowed) */
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mov dx, fname
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int 0x21
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jnc DONE
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mov [err], ax
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DONE:
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}
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if (err != 0) {
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output(fname);
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output(": ");
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outputnl(doserr(err));
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break;
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}
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}
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return(-1);
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}
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