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421 mateuszvis 1
/* This file is part of the SvarCOM project and is published under the terms
2
 * of the MIT license.
3
 *
4
 * Copyright (C) 2021 Mateusz Viste
5
 *
6
 * Permission is hereby granted, free of charge, to any person obtaining a
7
 * copy of this software and associated documentation files (the "Software"),
8
 * to deal in the Software without restriction, including without limitation
9
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10
 * and/or sell copies of the Software, and to permit persons to whom the
11
 * Software is furnished to do so, subject to the following conditions:
12
 *
13
 * The above copyright notice and this permission notice shall be included in
14
 * all copies or substantial portions of the Software.
15
 *
16
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22
 * DEALINGS IN THE SOFTWARE.
23
 */
24
 
403 mateuszvis 25
/*
26
 * copy
27
 */
28
 
29
/* /A - Used to copy ASCII files. Applies to the filename preceding it and to
30
 * all following filenames. Files will be copied until an end-of-file mark is
31
 * encountered in the file being copied. If an end-of-file mark is encountered
32
 * in the file, the rest of the file is not copied. DOS will append an EOF
33
 * mark at the end of the copied file.
34
 *
35
 * /B - Used to copy binary files. Applies to the filename preceding it and to
36
 * all following filenames. Copied files will be read by size (according to
37
 * the number of bytes indicated in the file`s directory listing). An EOF mark
38
 * is not placed at the end of the copied file.
39
 *
40
 * /V - Checks after the copy to assure that a file was copied correctly. If
41
 * the copy cannot be verified, the program will display an error message.
42
 * Using this option will result in a slower copying process.
409 mateuszvis 43
 *
44
 * special case: "COPY A+B+C+D" means "append B, C and D files to the A file"
45
 * if A does not exist, then "append C and D to B", etc.
403 mateuszvis 46
 */
47
 
48
struct copy_setup {
49
  const char *src[64];
50
  unsigned short src_count; /* how many sources are declared */
409 mateuszvis 51
  char dst[256];
52
  unsigned short dstlen;
403 mateuszvis 53
  char src_asciimode[64];
54
  char dst_asciimode;
55
  char last_asciimode; /* /A or /B impacts the file preceding it and becomes the new default for all files that follow */
56
  char verifyflag;
57
  char lastitemwasplus;
501 mateuszvis 58
  unsigned short databufsz;
59
  char databuf[1];
403 mateuszvis 60
};
61
 
409 mateuszvis 62
 
412 mateuszvis 63
/* copies src to dst, overwriting or appending to the destination.
64
 * - copy is performed in ASCII mode if asciiflag set (stop at first EOF in src
65
 *   and append an EOF in dst).
66
 * - returns zero on success, DOS error code on error */
502 mateuszvis 67
static unsigned short cmd_copy_internal(const char *dst, char dstascii, const char *src, char srcascii, unsigned char appendflag, void *buff, unsigned short buffsz) {
412 mateuszvis 68
  unsigned short errcode = 0;
69
  unsigned short srch = 0xffff, dsth = 0xffff;
70
  _asm {
71
 
72
    /* open src */
73
    OPENSRC:
74
    mov ax, 0x3d00 /* DOS 2+ -- open an existing file, read access mode */
75
    mov dx, src    /* ASCIIZ fname */
76
    int 0x21       /* CF clear on success, handle in AX */
502 mateuszvis 77
    jc FAIL
412 mateuszvis 78
    mov [srch], ax /* store src handle in memory */
79
 
80
    /* check appendflag so I know if I have to try opening dst for append */
81
    xor al, al
82
    or al, [appendflag]
83
    jz CREATEDST
84
 
85
    /* try opening dst first if appendflag set */
86
    mov ax, 0x3d01 /* DOS 2+ -- open an existing file, write access mode */
87
    mov dx, dst    /* ASCIIZ fname */
88
    int 0x21       /* CF clear on success, handle in AX */
89
    jc CREATEDST   /* failed to open file (file does not exist) */
90
    mov [dsth], ax /* store dst handle in memory */
91
 
92
    /* got file open, LSEEK to end of it now so future data is appended */
93
    mov bx, ax     /* file handle in BX (was still in AX) */
94
    mov ax, 0x4202 /* DOS 2+ -- set file pointer to end of file + CX:DX */
95
    xor cx, cx     /* offset zero */
96
    xor dx, dx     /* offset zero */
97
    int 0x21       /* CF set on error */
98
    jc FAIL
99
    jmp COPY
100
 
101
    /* create dst */
102
    CREATEDST:
103
    mov ah, 0x3c   /* DOS 2+ -- create a file */
104
    mov dx, dst
105
    xor cx, cx     /* zero out attributes */
106
    int 0x21       /* handle in AX on success, CF set on error */
107
    jc FAIL
108
    mov [dsth], ax /* store dst handle in memory */
109
 
110
    /* perform actual copy */
111
    COPY:
112
    /* read a block from src */
113
    mov ah, 0x3f   /* DOS 2+ -- read from file */
114
    mov bx, [srch]
115
    mov cx, [buffsz]
116
    mov dx, [buff] /* DX points to buffer */
117
    int 0x21       /* CF set on error, bytes read in AX (0=EOF) */
118
    jc FAIL        /* abort on error */
119
    /* EOF? (ax == 0) */
413 mateuszvis 120
    test ax, ax
121
    jz ENDOFFILE
412 mateuszvis 122
    /* write block of AX bytes to dst */
123
    mov cx, ax     /* block length */
124
    mov ah, 0x40   /* DOS 2+ -- write to file (CX bytes from DS:DX) */
125
    mov bx, [dsth] /* file handle */
126
    /* mov dx, [buff] */ /* DX points to buffer already */
127
    int 0x21       /* CF clear and AX=CX on success */
128
    jc FAIL
129
    cmp ax, cx     /* sould be equal, otherwise failed */
130
    mov ax, 0x08   /* preset to DOS error "Insufficient memory" */
131
    jne FAIL
132
    jmp COPY
133
 
134
    ENDOFFILE:
413 mateuszvis 135
    /* if dst ascii mode -> add an EOF (ASCII mode not supported for the time being) */
412 mateuszvis 136
 
137
    jmp CLOSESRC
138
 
139
    FAIL:
140
    mov [errcode], ax
141
 
142
    CLOSESRC:
143
    /* close src and dst */
144
    mov bx, [srch]
145
    cmp bx, 0xffff
146
    je CLOSEDST
147
    mov ah, 0x3e   /* DOS 2+ -- close a file handle */
148
    int 0x21
149
 
150
    CLOSEDST:
151
    mov bx, [dsth]
152
    cmp bx, 0xffff
153
    je DONE
154
    mov ah, 0x3e   /* DOS 2+ -- close a file handle */
155
    int 0x21
156
 
157
    DONE:
158
  }
159
  return(errcode);
160
}
161
 
162
 
403 mateuszvis 163
static int cmd_copy(struct cmd_funcparam *p) {
164
  struct copy_setup *setup = (void *)(p->BUFFER);
165
  unsigned short i;
409 mateuszvis 166
  unsigned short copiedcount_in = 0, copiedcount_out = 0; /* number of input/output copied files */
167
  struct DTA *dta = (void *)0x80; /* use DTA at default location in PSP */
403 mateuszvis 168
 
169
  if (cmd_ishlp(p)) {
170
    outputnl("Copies one or more files to another location.");
171
    outputnl("");
172
    outputnl("COPY [/A|/B] source [/A|/B] [+source [/A|/B] [+...]] [destination [/A|/B]] [/V]");
173
    outputnl("");
174
    outputnl("source       Specifies the file or files to be copied");
175
    outputnl("/A           Indicates an ASCII text file");
176
    outputnl("/B           Indicates a binary file");
177
    outputnl("destination  Specifies the directory and/or filename for the new file(s)");
178
    outputnl("/V           Verifies that new files are written correctly");
179
    outputnl("");
180
    outputnl("To append files, specify a single file for destination, but multiple files");
181
    outputnl("for source (using wildcards or file1+file2+file3 format).");
413 mateuszvis 182
    outputnl("");
183
    outputnl("NOTE: /A and /B are no-ops (ignored), provided only for compatibility reasons.");
403 mateuszvis 184
    return(-1);
185
  }
186
 
187
  /* parse cmdline and fill the setup struct accordingly */
188
 
189
  memset(setup, 0, sizeof(*setup));
501 mateuszvis 190
  setup->databufsz = p->BUFFERSZ - sizeof(*setup);
403 mateuszvis 191
 
192
  for (i = 0; i < p->argc; i++) {
193
 
194
    /* switch? */
195
    if (p->argv[i][0] == '/') {
196
      if ((imatch(p->argv[i], "/a")) || (imatch(p->argv[i], "/b"))) {
197
        setup->last_asciimode = 'b';
198
        if (imatch(p->argv[i], "/a")) setup->last_asciimode = 'a';
199
        /* */
409 mateuszvis 200
        if (setup->dst[0] != 0) {
403 mateuszvis 201
          setup->dst_asciimode = setup->last_asciimode;
202
        } else if (setup->src_count != 0) {
203
          setup->src_asciimode[setup->src_count - 1] = setup->last_asciimode;
204
        }
205
      } else if (imatch(p->argv[i], "/v")) {
206
        setup->verifyflag = 1;
207
      } else {
208
        outputnl("Invalid switch");
209
        return(-1);
210
      }
211
      continue;
212
    }
213
 
214
    /* not a switch - must be either a source, a destination or a + */
215
    if (p->argv[i][0] == '+') {
216
      /* a plus cannot appear after destination or before first source */
409 mateuszvis 217
      if ((setup->dst[0] != 0) || (setup->src_count == 0)) {
403 mateuszvis 218
        outputnl("Invalid syntax");
219
        return(-1);
220
      }
221
      setup->lastitemwasplus = 1;
222
      /* a plus may be immediately followed by a filename - if so, emulate
223
       * a new argument */
224
      if (p->argv[i][1] != 0) {
225
        p->argv[i] += 1;
226
        i--;
227
      }
228
      continue;
229
    }
230
 
231
    /* src? (first non-switch or something that follows a +) */
232
    if ((setup->lastitemwasplus) || (setup->src_count == 0)) {
233
      setup->src[setup->src_count] = p->argv[i];
234
      setup->src_asciimode[setup->src_count] = setup->last_asciimode;
235
      setup->src_count++;
236
      setup->lastitemwasplus = 0;
237
      continue;
238
    }
239
 
240
    /* must be a dst then */
409 mateuszvis 241
    if (setup->dst[0] != 0) {
403 mateuszvis 242
      outputnl("Invalid syntax");
243
      return(-1);
244
    }
409 mateuszvis 245
    if (file_truename(p->argv[i], setup->dst) != 0) {
246
      outputnl("Invalid destination");
247
      return(-1);
248
    }
403 mateuszvis 249
    setup->dst_asciimode = setup->last_asciimode;
409 mateuszvis 250
    /* if dst is a directory then append a backslash */
415 mateuszvis 251
    setup->dstlen = path_appendbkslash_if_dir(setup->dst);
403 mateuszvis 252
  }
253
 
254
  /* DEBUG: output setup content ("if 1" to enable) */
418 mateuszvis 255
  #if 0
403 mateuszvis 256
  printf("src: ");
257
  for (i = 0; i < setup->src_count; i++) {
258
    if (i != 0) printf(", ");
259
    printf("%s [%c]", setup->src[i], setup->src_asciimode[i]);
260
  }
261
  printf("\r\n");
262
  printf("dst: %s [%c]\r\n", setup->dst, setup->dst_asciimode);
263
  printf("verify: %s\r\n", (setup->verifyflag)?"ON":"OFF");
264
  #endif
265
 
409 mateuszvis 266
  /* must have at least one source */
267
  if (setup->src_count == 0) {
268
    outputnl("Required parameter missing");
269
    return(-1);
270
  }
403 mateuszvis 271
 
409 mateuszvis 272
  /* perform the operation based on setup directives:
273
   * iterate over every source and copy it to dest */
274
 
275
  for (i = 0; i < setup->src_count; i++) {
276
    unsigned short t;
277
    unsigned short databuflen;
278
    unsigned short pathendoffset;
279
 
280
    /* resolve truename of src and write it to buffer */
281
    t = file_truename(setup->src[i], setup->databuf);
282
    if (t != 0) {
283
      output(setup->src[i]);
284
      output(" - ");
285
      outputnl(doserr(t));
286
      continue;
287
    }
288
    databuflen = strlen(setup->databuf); /* remember databuf length */
289
 
290
    /* if length zero, skip (not sure why this would be possible, though) */
291
    if (databuflen == 0) continue;
292
 
293
    /* if src does not end with a backslash AND it is a directory then append a backslash */
415 mateuszvis 294
    databuflen = path_appendbkslash_if_dir(setup->databuf);
409 mateuszvis 295
 
296
    /* if src ends with a '\' then append *.* */
297
    if (setup->databuf[databuflen - 1] == '\\') {
298
      strcat(setup->databuf, "*.*");
299
    }
300
 
301
    /* remember where the path in databuf ends */
302
    for (t = 0; setup->databuf[t] != 0; t++) {
303
      if (setup->databuf[t] == '\\') pathendoffset = t + 1;
304
    }
305
 
306
    /* */
307
    if (findfirst(dta, setup->databuf, 0) != 0) {
308
      continue;
309
    }
310
 
311
    do {
412 mateuszvis 312
      char appendflag;
409 mateuszvis 313
      if (dta->attr & DOS_ATTR_DIR) continue; /* skip directories */
314
 
315
      /* compute full path/name of the file */
316
      strcpy(setup->databuf + pathendoffset, dta->fname);
317
 
318
      /* if there was no destination, then YOU are the destination now!
319
       * this handles situations like COPY a.txt+b.txt+c.txt */
320
      if (setup->dst[0] == NULL) {
321
        strcpy(setup->dst, setup->databuf);
322
        setup->dstlen = strlen(setup->dst);
323
        copiedcount_in++;
324
        copiedcount_out++;
325
        continue;
326
      }
327
 
328
      /* is dst ending with a backslash? then append fname to it */
329
      if (setup->dst[setup->dstlen - 1] == '\\') strcpy(setup->dst + setup->dstlen, dta->fname);
330
 
331
      /* now databuf contains the full source and dst contains the full dest... COPY TIME! */
332
 
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
}