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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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* copy
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*/
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/* /A - Used to copy ASCII files. Applies to the filename preceding it and to
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* all following filenames. Files will be copied until an end-of-file mark is
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* encountered in the file being copied. If an end-of-file mark is encountered
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* in the file, the rest of the file is not copied. DOS will append an EOF
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* mark at the end of the copied file.
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*
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* /B - Used to copy binary files. Applies to the filename preceding it and to
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* all following filenames. Copied files will be read by size (according to
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* the number of bytes indicated in the file`s directory listing). An EOF mark
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* is not placed at the end of the copied file.
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*
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* /V - Checks after the copy to assure that a file was copied correctly. If
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* the copy cannot be verified, the program will display an error message.
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* Using this option will result in a slower copying process.
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mateuszvis |
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*
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* special case: "COPY A+B+C+D" means "append B, C and D files to the A file"
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* if A does not exist, then "append C and D to B", etc.
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mateuszvis |
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*/
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struct copy_setup {
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const char *src[64];
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unsigned short src_count; /* how many sources are declared */
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mateuszvis |
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char dst[256];
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unsigned short dstlen;
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mateuszvis |
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char src_asciimode[64];
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char dst_asciimode;
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char last_asciimode; /* /A or /B impacts the file preceding it and becomes the new default for all files that follow */
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char verifyflag;
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char lastitemwasplus;
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mateuszvis |
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unsigned short databufsz;
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char databuf[1];
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mateuszvis |
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};
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mateuszvis |
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mateuszvis |
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/* copies src to dst, overwriting or appending to the destination.
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* - copy is performed in ASCII mode if asciiflag set (stop at first EOF in src
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* and append an EOF in dst).
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* - returns zero on success, DOS error code on error */
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mateuszvis |
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static unsigned short cmd_copy_internal(const char *dst, char dstascii, const char *src, char srcascii, unsigned char appendflag, void *buff, unsigned short buffsz) {
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mateuszvis |
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unsigned short errcode = 0;
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unsigned short srch = 0xffff, dsth = 0xffff;
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_asm {
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/* open src */
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OPENSRC:
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mov ax, 0x3d00 /* DOS 2+ -- open an existing file, read access mode */
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mov dx, src /* ASCIIZ fname */
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int 0x21 /* CF clear on success, handle in AX */
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mateuszvis |
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jc FAIL
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mateuszvis |
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mov [srch], ax /* store src handle in memory */
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/* check appendflag so I know if I have to try opening dst for append */
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xor al, al
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or al, [appendflag]
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jz CREATEDST
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/* try opening dst first if appendflag set */
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mov ax, 0x3d01 /* DOS 2+ -- open an existing file, write access mode */
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mov dx, dst /* ASCIIZ fname */
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int 0x21 /* CF clear on success, handle in AX */
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jc CREATEDST /* failed to open file (file does not exist) */
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mov [dsth], ax /* store dst handle in memory */
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/* got file open, LSEEK to end of it now so future data is appended */
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mov bx, ax /* file handle in BX (was still in AX) */
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mov ax, 0x4202 /* DOS 2+ -- set file pointer to end of file + CX:DX */
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xor cx, cx /* offset zero */
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xor dx, dx /* offset zero */
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int 0x21 /* CF set on error */
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jc FAIL
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jmp COPY
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/* create dst */
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CREATEDST:
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mov ah, 0x3c /* DOS 2+ -- create a file */
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mov dx, dst
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xor cx, cx /* zero out attributes */
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int 0x21 /* handle in AX on success, CF set on error */
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jc FAIL
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mov [dsth], ax /* store dst handle in memory */
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/* perform actual copy */
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COPY:
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/* read a block from src */
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mov ah, 0x3f /* DOS 2+ -- read from file */
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mov bx, [srch]
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mov cx, [buffsz]
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mov dx, [buff] /* DX points to buffer */
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int 0x21 /* CF set on error, bytes read in AX (0=EOF) */
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jc FAIL /* abort on error */
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/* EOF? (ax == 0) */
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mateuszvis |
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test ax, ax
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jz ENDOFFILE
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mateuszvis |
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/* write block of AX bytes to dst */
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mov cx, ax /* block length */
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mov ah, 0x40 /* DOS 2+ -- write to file (CX bytes from DS:DX) */
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mov bx, [dsth] /* file handle */
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/* mov dx, [buff] */ /* DX points to buffer already */
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int 0x21 /* CF clear and AX=CX on success */
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jc FAIL
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cmp ax, cx /* sould be equal, otherwise failed */
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mov ax, 0x08 /* preset to DOS error "Insufficient memory" */
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jne FAIL
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jmp COPY
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ENDOFFILE:
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mateuszvis |
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/* if dst ascii mode -> add an EOF (ASCII mode not supported for the time being) */
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mateuszvis |
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jmp CLOSESRC
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FAIL:
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mov [errcode], ax
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CLOSESRC:
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/* close src and dst */
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mov bx, [srch]
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cmp bx, 0xffff
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je CLOSEDST
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mov ah, 0x3e /* DOS 2+ -- close a file handle */
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int 0x21
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CLOSEDST:
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mov bx, [dsth]
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cmp bx, 0xffff
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je DONE
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mov ah, 0x3e /* DOS 2+ -- close a file handle */
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int 0x21
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DONE:
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}
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return(errcode);
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}
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mateuszvis |
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static int cmd_copy(struct cmd_funcparam *p) {
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struct copy_setup *setup = (void *)(p->BUFFER);
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unsigned short i;
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mateuszvis |
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unsigned short copiedcount_in = 0, copiedcount_out = 0; /* number of input/output copied files */
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struct DTA *dta = (void *)0x80; /* use DTA at default location in PSP */
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mateuszvis |
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if (cmd_ishlp(p)) {
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outputnl("Copies one or more files to another location.");
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outputnl("");
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outputnl("COPY [/A|/B] source [/A|/B] [+source [/A|/B] [+...]] [destination [/A|/B]] [/V]");
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outputnl("");
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outputnl("source Specifies the file or files to be copied");
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outputnl("/A Indicates an ASCII text file");
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outputnl("/B Indicates a binary file");
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outputnl("destination Specifies the directory and/or filename for the new file(s)");
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outputnl("/V Verifies that new files are written correctly");
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outputnl("");
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outputnl("To append files, specify a single file for destination, but multiple files");
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outputnl("for source (using wildcards or file1+file2+file3 format).");
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mateuszvis |
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outputnl("");
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outputnl("NOTE: /A and /B are no-ops (ignored), provided only for compatibility reasons.");
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mateuszvis |
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return(-1);
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}
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/* parse cmdline and fill the setup struct accordingly */
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memset(setup, 0, sizeof(*setup));
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mateuszvis |
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setup->databufsz = p->BUFFERSZ - sizeof(*setup);
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mateuszvis |
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for (i = 0; i < p->argc; i++) {
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/* switch? */
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if (p->argv[i][0] == '/') {
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if ((imatch(p->argv[i], "/a")) || (imatch(p->argv[i], "/b"))) {
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setup->last_asciimode = 'b';
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if (imatch(p->argv[i], "/a")) setup->last_asciimode = 'a';
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/* */
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mateuszvis |
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if (setup->dst[0] != 0) {
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mateuszvis |
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setup->dst_asciimode = setup->last_asciimode;
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} else if (setup->src_count != 0) {
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setup->src_asciimode[setup->src_count - 1] = setup->last_asciimode;
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}
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} else if (imatch(p->argv[i], "/v")) {
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setup->verifyflag = 1;
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} else {
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outputnl("Invalid switch");
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return(-1);
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}
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continue;
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}
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/* not a switch - must be either a source, a destination or a + */
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if (p->argv[i][0] == '+') {
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/* a plus cannot appear after destination or before first source */
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mateuszvis |
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if ((setup->dst[0] != 0) || (setup->src_count == 0)) {
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mateuszvis |
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outputnl("Invalid syntax");
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return(-1);
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}
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setup->lastitemwasplus = 1;
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/* a plus may be immediately followed by a filename - if so, emulate
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* a new argument */
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if (p->argv[i][1] != 0) {
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p->argv[i] += 1;
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i--;
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}
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continue;
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}
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/* src? (first non-switch or something that follows a +) */
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if ((setup->lastitemwasplus) || (setup->src_count == 0)) {
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setup->src[setup->src_count] = p->argv[i];
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setup->src_asciimode[setup->src_count] = setup->last_asciimode;
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setup->src_count++;
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setup->lastitemwasplus = 0;
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continue;
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}
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/* must be a dst then */
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mateuszvis |
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if (setup->dst[0] != 0) {
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mateuszvis |
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outputnl("Invalid syntax");
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return(-1);
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}
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mateuszvis |
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if (file_truename(p->argv[i], setup->dst) != 0) {
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outputnl("Invalid destination");
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return(-1);
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}
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mateuszvis |
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setup->dst_asciimode = setup->last_asciimode;
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mateuszvis |
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/* if dst is a directory then append a backslash */
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mateuszvis |
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setup->dstlen = path_appendbkslash_if_dir(setup->dst);
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mateuszvis |
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}
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/* DEBUG: output setup content ("if 1" to enable) */
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mateuszvis |
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#if 0
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mateuszvis |
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printf("src: ");
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for (i = 0; i < setup->src_count; i++) {
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if (i != 0) printf(", ");
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printf("%s [%c]", setup->src[i], setup->src_asciimode[i]);
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}
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printf("\r\n");
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printf("dst: %s [%c]\r\n", setup->dst, setup->dst_asciimode);
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printf("verify: %s\r\n", (setup->verifyflag)?"ON":"OFF");
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#endif
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mateuszvis |
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/* must have at least one source */
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if (setup->src_count == 0) {
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outputnl("Required parameter missing");
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return(-1);
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}
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mateuszvis |
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mateuszvis |
272 |
/* perform the operation based on setup directives:
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* iterate over every source and copy it to dest */
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for (i = 0; i < setup->src_count; i++) {
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unsigned short t;
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unsigned short databuflen;
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unsigned short pathendoffset;
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/* resolve truename of src and write it to buffer */
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t = file_truename(setup->src[i], setup->databuf);
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if (t != 0) {
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output(setup->src[i]);
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output(" - ");
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outputnl(doserr(t));
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continue;
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}
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databuflen = strlen(setup->databuf); /* remember databuf length */
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289 |
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/* if length zero, skip (not sure why this would be possible, though) */
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if (databuflen == 0) continue;
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/* if src does not end with a backslash AND it is a directory then append a backslash */
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mateuszvis |
294 |
databuflen = path_appendbkslash_if_dir(setup->databuf);
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mateuszvis |
295 |
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/* if src ends with a '\' then append *.* */
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if (setup->databuf[databuflen - 1] == '\\') {
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strcat(setup->databuf, "*.*");
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}
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300 |
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/* remember where the path in databuf ends */
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for (t = 0; setup->databuf[t] != 0; t++) {
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303 |
if (setup->databuf[t] == '\\') pathendoffset = t + 1;
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}
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305 |
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/* */
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if (findfirst(dta, setup->databuf, 0) != 0) {
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continue;
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}
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310 |
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311 |
do {
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mateuszvis |
312 |
char appendflag;
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mateuszvis |
313 |
if (dta->attr & DOS_ATTR_DIR) continue; /* skip directories */
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314 |
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315 |
/* compute full path/name of the file */
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316 |
strcpy(setup->databuf + pathendoffset, dta->fname);
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317 |
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318 |
/* if there was no destination, then YOU are the destination now!
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319 |
* this handles situations like COPY a.txt+b.txt+c.txt */
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320 |
if (setup->dst[0] == NULL) {
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321 |
strcpy(setup->dst, setup->databuf);
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322 |
setup->dstlen = strlen(setup->dst);
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323 |
copiedcount_in++;
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copiedcount_out++;
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325 |
continue;
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326 |
}
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327 |
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328 |
/* is dst ending with a backslash? then append fname to it */
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329 |
if (setup->dst[setup->dstlen - 1] == '\\') strcpy(setup->dst + setup->dstlen, dta->fname);
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330 |
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331 |
/* now databuf contains the full source and dst contains the full dest... COPY TIME! */
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332 |
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|
333 |
/* if dst file exists already -> overwrite it or append?
|
|
|
334 |
- if dst is a dir (dstlen-1 points at a \\) -> overwrite
|
|
|
335 |
- otherwise: if copiedcount_in==0 overwrite, else append */
|
|
|
336 |
output(setup->databuf);
|
|
|
337 |
if ((setup->dst[setup->dstlen - 1] == '\\') || (copiedcount_in == 0)) {
|
412 |
mateuszvis |
338 |
appendflag = 0;
|
409 |
mateuszvis |
339 |
output(" > ");
|
|
|
340 |
copiedcount_out++;
|
|
|
341 |
} else {
|
412 |
mateuszvis |
342 |
appendflag = 1;
|
409 |
mateuszvis |
343 |
output(" >> ");
|
|
|
344 |
}
|
|
|
345 |
outputnl(setup->dst);
|
|
|
346 |
|
501 |
mateuszvis |
347 |
// TODO: reusing setup->databuf not good idea: when 2+ files are being copied, the content of the first one overwrites the pathname of the second one!
|
|
|
348 |
t = cmd_copy_internal(setup->dst, 0, setup->databuf, 0, appendflag, setup->databuf, setup->databufsz);
|
412 |
mateuszvis |
349 |
if (t != 0) {
|
|
|
350 |
outputnl(doserr(t));
|
|
|
351 |
return(-1);
|
|
|
352 |
}
|
|
|
353 |
|
409 |
mateuszvis |
354 |
copiedcount_in++;
|
|
|
355 |
} while (findnext(dta) == 0);
|
|
|
356 |
|
|
|
357 |
}
|
|
|
358 |
|
|
|
359 |
sprintf(setup->databuf, "%u file(s) copied", copiedcount_out);
|
|
|
360 |
outputnl(setup->databuf);
|
|
|
361 |
|
403 |
mateuszvis |
362 |
return(-1);
|
|
|
363 |
}
|