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/* This file is part of the SvarCOM project and is published under the terms
* of the MIT license.
*
* Copyright (C) 2021-2024 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.
*/
/*
* ver
*/
static enum cmd_result cmd_ver(struct cmd_funcparam *p) {
char *buff = p->BUFFER;
unsigned char maj = 0, min = 0, retcode = 0, truemaj = 0, truemin = 0, rev = 0, verflags = 0;
unsigned short drdosver = 0;
unsigned short doscrelstrseg = 0, doscrelstroff = 0;
/* help screen */
if (cmd_ishlp(p)) {
nls_outputnl(20,0); /* "Displays the DOS kernel and SvarCOM shell versions." */
outputnl("");
output("ver [/about]");
#ifdef VERDBG
output(" [/dbg]");
#endif
outputnl("");
return(CMD_OK);
}
#ifdef VERDBG
if ((p->argc == 1) && (imatch(p->argv[0], "/dbg"))) {
unsigned short far *rmod_envseg = MK_FP(p->rmod->rmodseg, RMOD_OFFSET_ENVSEG);
unsigned char far *rmod_exitcode = MK_FP(p->rmod->rmodseg, RMOD_OFFSET_LEXITCODE);
unsigned short far *rmod_comspecptr = MK_FP(p->rmod->rmodseg, RMOD_OFFSET_COMSPECPTR);
char far *fptr;
unsigned short i;
printf("rmod->rmodseg = 0x%04X\r\n", p->rmod->rmodseg);
printf("rmod->origint22 = %04X:%04X\r\n", p->rmod->origint22 >> 16, p->rmod->origint22 & 0xffff);
printf("rmod->origparent = 0x%04X\r\n", p->rmod->origparent);
printf("rmod->flags = 0x%02X\r\n", p->rmod->flags);
printf("[rmod:RMOD_OFFSET_ENVSEG] = 0x%04X\r\n", *rmod_envseg);
printf("environment allocated size: %u bytes\r\n", env_allocsz(*rmod_envseg));
for (fptr = MK_FP(p->rmod->rmodseg, RMOD_OFFSET_BOOTDRIVE), i = 0; *fptr != 0; fptr++) buff[i++] = *fptr;
buff[i] = 0;
printf("[rmod:RMOD_OFFSET_BOOTCOMSPEC] = '%s'\r\n", buff);
if (*rmod_comspecptr == 0) {
sprintf(buff, "NULL");
} else {
for (fptr = MK_FP(*rmod_envseg, *rmod_comspecptr), i = 0; *fptr != 0; fptr++) buff[i++] = *fptr;
buff[i] = 0;
}
printf("[rmod:RMOD_OFFSET_COMSPECPTR] = '%s'\r\n", buff);
printf("[rmod:RMOD_OFFSET_LEXITCODE] = %u\r\n", *rmod_exitcode);
printf("rmod dump (first 64 bytes at [rmodseg:0100h]):\r\n");
fptr = MK_FP(p->rmod->rmodseg, 0x100);
for (i = 0; i < 64; i += 16) {
int ii;
for (ii = i; ii < i + 16; ii++) printf(" %02X", fptr[ii]);
printf(" ");
for (ii = i; ii < i + 16; ii++) {
if (fptr[ii] < ' ') {
printf(".");
} else {
printf("%c", fptr[ii]);
}
}
printf("\r\n");
}
return(CMD_OK);
}
#endif
if ((p->argc == 1) && (imatch(p->argv[0], "/about"))) {
nls_outputnl(20,3); /* "SvarCOM is a shell interpreter for DOS kernels compatible with MS-DOS 5+." */
outputnl("");
nls_outputnl(20,4); /* "This software is distributed under the terms of the MIT license." */
outputnl("Copyright (C) " COPYRDATE " Mateusz Viste");
outputnl("");
outputnl("Program ten dedykuje Milenie i Mojmirowi. Zycze wam, byscie w swoim zyciu");
outputnl("potrafili docenic wartosci minionych pokolen, jednoczesnie czerpiac radosc");
outputnl("z prostych przyjemnosci dnia codziennego. Lair, jesien 2021.");
return(CMD_OK);
}
_asm {
push ax
push bx
push cx
push dx
/* get the "normal" (spoofable) DOS version */
mov ah, 0x30 /* function supported on DOS 2+ */
int 0x21 /* AL=maj_ver_num AH=min_ver_num BX,CX=OEM */
mov [maj], al
mov [min], ah
/* get the "true" DOS version, along with a couple of extra data */
mov ax, 0x3306 /* function supported on DOS 5+ */
int 0x21
mov [retcode], al /* AL=return_code for DOS < 5 */
mov [truemaj], bl /* BL=maj_ver_num BH=min_ver_num */
mov [truemin], bh
mov [rev], dl /* DL=revision DH=kernel_memory_area */
mov [verflags], dh
/* get the DR-DOS specific version through INT 21h,4452h */
mov ax, 0x4452
int 0x21
jc NOTDRDOS
mov drdosver, ax
NOTDRDOS:
/* get a pointer to the DOS-C style "os_release" via INT 21h,33FFh */
mov ax, 0x33ff
xor dx, dx
int 0x21
jc NOTDOSC
mov doscrelstrseg, dx
mov doscrelstroff, ax
NOTDOSC:
pop dx
pop cx
pop bx
pop ax
}
/* look for a DOS-C os_release (FreeDOS, EDR-DOS, RX-DOS...)
* https://github.com/SvarDOS/edrdos/issues/77 */
if (doscrelstrseg != 0) {
char far *osrel = MK_FP(doscrelstrseg, doscrelstroff);
unsigned short i;
for (i = 0; osrel[i] != 0; i++) {
buff[i] = osrel[i];
}
buff[i] = 0;
outputnl(buff);
}
if (drdosver != 0) {
sprintf(buff, svarlang_str(20,11), drdosver & 0xff, drdosver >> 8);
outputnl(buff);
}
sprintf(buff, svarlang_str(20,1), maj, min); /* "DOS kernel version %u.%u" */
output(buff);
/* can we trust in the data returned? */
/* DR DOS 5&6 return 0x01, MS-DOS 2-4 return 0xff */
/* 'truemaj' is checked to mitigate the conflict from the CBIS redirector */
if ((retcode > 1) && (retcode < 255) && (truemaj > 4) && (truemaj < 100)) {
if ((maj != truemaj) || (min != truemin)) {
output(" (");
sprintf(buff, svarlang_str(20,10), truemaj, truemin); /* "true ver xx.xx" */
output(buff);
output(")");
}
outputnl("");
sprintf(buff, svarlang_str(20,5), 'A' + rev); /* "Revision %c" */
outputnl(buff);
{
const char *loc = svarlang_str(20,7); /* "low memory" */
if (verflags & 16) loc = svarlang_str(20,8); /* "HMA" */
if (verflags & 8) loc = svarlang_str(20,9); /* "ROM" */
sprintf(buff, svarlang_str(20,6), loc); /* "DOS is in %s" */
outputnl(buff);
}
}
outputnl("");
nls_output(20,2); /* "SvarCOM shell ver" */
outputnl(" " PVER);
return(CMD_OK);
}