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/* This file is part of the SvarCOM project and is published under the terms
* of the MIT license.
*
* Copyright (C) 2021-2022 Mateusz Viste
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
/*
* copy
*/
/* /A - Used to copy ASCII files. Applies to the filename preceding it and to
* all following filenames. Files will be copied until an end-of-file mark is
* encountered in the file being copied. If an end-of-file mark is encountered
* in the file, the rest of the file is not copied. DOS will append an EOF
* mark at the end of the copied file.
*
* /B - Used to copy binary files. Applies to the filename preceding it and to
* all following filenames. Copied files will be read by size (according to
* the number of bytes indicated in the file`s directory listing). An EOF mark
* is not placed at the end of the copied file.
*
* /V - Checks after the copy to assure that a file was copied correctly. If
* the copy cannot be verified, the program will display an error message.
* Using this option will result in a slower copying process.
*
* special case: "COPY A+B+C+D" means "append B, C and D files to the A file"
* if A does not exist, then "append C and D to B", etc.
*/
struct copy_setup {
const char *src[64];
unsigned short src_count; /* how many sources are declared */
char cursrc[256]; /* buffer for currently processed src */
char dst[256];
unsigned short dstlen;
char src_asciimode[64];
char dst_asciimode;
char last_asciimode; /* /A or /B impacts the file preceding it and becomes the new default for all files that follow */
char verifyflag;
char lastitemwasplus;
unsigned short databufsz;
char databuf[1];
};
/* copies src to dst, overwriting or appending to the destination.
* - copy is performed in ASCII mode if asciiflag set (stop at first EOF in src
* and append an EOF in dst).
* - returns zero on success, DOS error code on error */
static unsigned short cmd_copy_internal(const char *dst, char dstascii, const char *src, char srcascii, unsigned char appendflag, void *buff, unsigned short buffsz) {
unsigned short errcode = 0;
unsigned short srch = 0xffff, dsth = 0xffff;
_asm {
/* open src */
OPENSRC:
mov ax, 0x3d00 /* DOS 2+ -- open an existing file, read access mode */
mov dx, src /* ASCIIZ fname */
int 0x21 /* CF clear on success, handle in AX */
jc FAIL
mov [srch], ax /* store src handle in memory */
/* check appendflag so I know if I have to try opening dst for append */
xor al, al
or al, [appendflag]
jz CREATEDST
/* try opening dst first if appendflag set */
mov ax, 0x3d01 /* DOS 2+ -- open an existing file, write access mode */
mov dx, dst /* ASCIIZ fname */
int 0x21 /* CF clear on success, handle in AX */
jc CREATEDST /* failed to open file (file does not exist) */
mov [dsth], ax /* store dst handle in memory */
/* got file open, LSEEK to end of it now so future data is appended */
mov bx, ax /* file handle in BX (was still in AX) */
mov ax, 0x4202 /* DOS 2+ -- set file pointer to end of file + CX:DX */
xor cx, cx /* offset zero */
xor dx, dx /* offset zero */
int 0x21 /* CF set on error */
jc FAIL
jmp COPY
/* create dst */
CREATEDST:
mov ah, 0x3c /* DOS 2+ -- create a file */
mov dx, dst
xor cx, cx /* zero out attributes */
int 0x21 /* handle in AX on success, CF set on error */
jc FAIL
mov [dsth], ax /* store dst handle in memory */
/* perform actual copy */
COPY:
/* read a block from src */
mov ah, 0x3f /* DOS 2+ -- read from file */
mov bx, [srch]
mov cx, [buffsz]
mov dx, [buff] /* DX points to buffer */
int 0x21 /* CF set on error, bytes read in AX (0=EOF) */
jc FAIL /* abort on error */
/* EOF? (ax == 0) */
test ax, ax
jz ENDOFFILE
/* write block of AX bytes to dst */
mov cx, ax /* block length */
mov ah, 0x40 /* DOS 2+ -- write to file (CX bytes from DS:DX) */
mov bx, [dsth] /* file handle */
/* mov dx, [buff] */ /* DX points to buffer already */
int 0x21 /* CF clear and AX=CX on success */
jc FAIL
cmp ax, cx /* sould be equal, otherwise failed */
mov ax, 0x08 /* preset to DOS error "Insufficient memory" */
jne FAIL
jmp COPY
ENDOFFILE:
/* if dst ascii mode -> add an EOF (ASCII mode not supported for the time being) */
jmp CLOSESRC
FAIL:
mov [errcode], ax
CLOSESRC:
/* close src and dst */
mov bx, [srch]
cmp bx, 0xffff
je CLOSEDST
mov ah, 0x3e /* DOS 2+ -- close a file handle */
int 0x21
CLOSEDST:
mov bx, [dsth]
cmp bx, 0xffff
je DONE
mov ah, 0x3e /* DOS 2+ -- close a file handle */
int 0x21
DONE:
}
return(errcode);
}
static enum cmd_result cmd_copy(struct cmd_funcparam *p) {
struct copy_setup *setup = (void *)(p->BUFFER);
unsigned short i;
unsigned short copiedcount_in = 0, copiedcount_out = 0; /* number of input/output copied files */
struct DTA *dta = (void *)0x80; /* use DTA at default location in PSP */
if (cmd_ishlp(p)) {
nls_outputnl(38,0); /* "Copies one or more files to another location." */
outputnl("");
nls_outputnl(38,1); /* "COPY [/A|/B] source [/A|/B] [+source [/A|/B] [+...]] [destination [/A|/B]] [/V]" */
outputnl("");
nls_outputnl(38,2); /* "source Specifies the file or files to be copied" */
nls_outputnl(38,3); /* "/A Indicates an ASCII text file" */
nls_outputnl(38,4); /* "/B Indicates a binary file" */
nls_outputnl(38,5); /* "destination Specifies the directory and/or filename for the new file(s)" */
nls_outputnl(38,6); /* "/V Verifies that new files are written correctly" */
outputnl("");
nls_outputnl(38,7); /* "To append files, specify a single file for destination, but multiple (...)" */
outputnl("");
nls_outputnl(38,8); /* "NOTE: /A and /B are no-ops, provided only for compatibility reasons" */
return(CMD_OK);
}
/* parse cmdline and fill the setup struct accordingly */
memset(setup, 0, sizeof(*setup));
setup->databufsz = p->BUFFERSZ - sizeof(*setup);
for (i = 0; i < p->argc; i++) {
/* switch? */
if (p->argv[i][0] == '/') {
if ((imatch(p->argv[i], "/a")) || (imatch(p->argv[i], "/b"))) {
setup->last_asciimode = 'b';
if (imatch(p->argv[i], "/a")) setup->last_asciimode = 'a';
/* */
if (setup->dst[0] != 0) {
setup->dst_asciimode = setup->last_asciimode;
} else if (setup->src_count != 0) {
setup->src_asciimode[setup->src_count - 1] = setup->last_asciimode;
}
} else if (imatch(p->argv[i], "/v")) {
setup->verifyflag = 1;
} else {
nls_outputnl(0,2); /* "Invalid switch" */
return(CMD_FAIL);
}
continue;
}
/* not a switch - must be either a source, a destination or a + */
if (p->argv[i][0] == '+') {
/* a plus cannot appear after destination or before first source */
if ((setup->dst[0] != 0) || (setup->src_count == 0)) {
nls_outputnl(0,1); /* "Invalid syntax" */
return(CMD_FAIL);
}
setup->lastitemwasplus = 1;
/* a plus may be immediately followed by a filename - if so, emulate
* a new argument */
if (p->argv[i][1] != 0) {
p->argv[i] += 1;
i--;
}
continue;
}
/* src? (first non-switch or something that follows a +) */
if ((setup->lastitemwasplus) || (setup->src_count == 0)) {
setup->src[setup->src_count] = p->argv[i];
setup->src_asciimode[setup->src_count] = setup->last_asciimode;
setup->src_count++;
setup->lastitemwasplus = 0;
continue;
}
/* must be a dst then */
if (setup->dst[0] != 0) {
nls_outputnl(0,1); /* "Invalid syntax" */
return(CMD_FAIL);
}
if (file_truename(p->argv[i], setup->dst) != 0) {
nls_outputnl(0,8); /* "Invalid destination" */
return(CMD_FAIL);
}
setup->dst_asciimode = setup->last_asciimode;
/* if dst is a directory then append a backslash */
setup->dstlen = path_appendbkslash_if_dir(setup->dst);
}
/* DEBUG: output setup content ("if 1" to enable) */
#if 0
printf("src: ");
for (i = 0; i < setup->src_count; i++) {
if (i != 0) printf(", ");
printf("%s [%c]", setup->src[i], setup->src_asciimode[i]);
}
printf("\r\n");
printf("dst: %s [%c]\r\n", setup->dst, setup->dst_asciimode);
printf("verify: %s\r\n", (setup->verifyflag)?"ON":"OFF");
#endif
/* must have at least one source */
if (setup->src_count == 0) {
nls_outputnl(0,7); /* "Required parameter missing" */
return(CMD_FAIL);
}
/* perform the operation based on setup directives:
* iterate over every source and copy it to dest */
for (i = 0; i < setup->src_count; i++) {
unsigned short t;
unsigned short cursrclen;
unsigned short pathendoffset;
/* resolve truename of src and write it to buffer */
t = file_truename(setup->src[i], setup->cursrc);
if (t != 0) {
output(setup->src[i]);
output(" - ");
nls_outputnl_doserr(t);
continue;
}
cursrclen = strlen(setup->cursrc); /* remember cursrc length */
/* if length zero, skip (not sure why this would be possible, though) */
if (cursrclen == 0) continue;
/* if src does not end with a backslash AND it is a directory then append a backslash */
cursrclen = path_appendbkslash_if_dir(setup->cursrc);
/* if src ends with a '\' then append *.* */
if (setup->cursrc[cursrclen - 1] == '\\') {
strcat(setup->cursrc, "*.*");
}
/* remember where the path in cursrc ends */
for (t = 0; setup->cursrc[t] != 0; t++) {
if (setup->cursrc[t] == '\\') pathendoffset = t + 1;
}
/* */
if (findfirst(dta, setup->cursrc, 0) != 0) {
continue;
}
do {
char appendflag;
if (dta->attr & DOS_ATTR_DIR) continue; /* skip directories */
/* compute full path/name of the file */
strcpy(setup->cursrc + pathendoffset, dta->fname);
/* if there was no destination, then YOU are the destination now!
* this handles situations like COPY a.txt+b.txt+c.txt */
if (setup->dst[0] == NULL) {
strcpy(setup->dst, setup->cursrc);
setup->dstlen = strlen(setup->dst);
copiedcount_in++;
copiedcount_out++;
continue;
}
/* is dst ending with a backslash? then append fname to it */
if (setup->dst[setup->dstlen - 1] == '\\') strcpy(setup->dst + setup->dstlen, dta->fname);
/* now cursrc contains the full source and dst contains the full dest... COPY TIME! */
/* if dst file exists already -> overwrite it or append?
- if dst is a dir (dstlen-1 points at a \\) -> overwrite
- otherwise: if copiedcount_in==0 overwrite, else append */
output(setup->cursrc);
if ((setup->dst[setup->dstlen - 1] == '\\') || (copiedcount_in == 0)) {
appendflag = 0;
output(" > ");
copiedcount_out++;
} else {
appendflag = 1;
output(" >> ");
}
outputnl(setup->dst);
t = cmd_copy_internal(setup->dst, 0, setup->cursrc, 0, appendflag, setup->databuf, setup->databufsz);
if (t != 0) {
nls_outputnl_doserr(t);
return(CMD_FAIL);
}
copiedcount_in++;
} while (findnext(dta) == 0);
}
sprintf(setup->databuf, svarlang_str(38,9)/*"%u file(s) copied"*/, copiedcount_out);
outputnl(setup->databuf);
return(CMD_OK);
}