10,6 → 10,37 |
* Type CD without parameters to display the current drive and directory. |
*/ |
|
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/* display current path drive d (A=1, B=2, etc) |
* returns 0 on success, doserr otherwise */ |
static unsigned short cmd_cd_curpathfordrv(char *buff, unsigned char d) { |
unsigned short r = 0; |
|
buff[0] = d + 'A' - 1; |
buff[1] = ':'; |
buff[2] = '\\'; |
|
_asm { |
push si |
push ax |
push dx |
mov ah, 0x47 /* get current directory */ |
mov dl, [d] /* A: = 1, B: = 2, etc */ |
mov si, buff /* append cur dir to buffer */ |
add si, 3 /* skip the present drive:\ prefix */ |
int 0x21 |
jnc DONE |
mov [r], ax /* copy result from ax */ |
DONE: |
pop dx |
pop ax |
pop si |
} |
|
return(r); |
} |
|
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static int cmd_cd(struct cmd_funcparam *p) { |
char *buffptr = p->BUFFER; |
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37,6 → 68,8 |
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/* no argument? display current drive and dir ("CWD") */ |
if (p->argc == 0) { |
unsigned char drv = 0; |
|
_asm { |
push ax |
push dx |
43,25 → 76,13 |
push si |
mov ah, 0x19 /* get current default drive */ |
int 0x21 /* al = drive (00h = A:, 01h = B:, etc) */ |
add al, 'A' |
/* print drive to stdout */ |
mov dl, al |
mov ah, 0x02 |
int 0x21 |
mov dl, ':' |
int 0x21 |
mov dl, '\' |
int 0x21 |
/* get current dir */ |
mov ah, 0x47 |
xor dl, dl /* select drive (0 = current drive) */ |
mov si, buffptr /* 64-byte buffer for ASCIZ pathname */ |
int 0x21 |
pop si |
pop dx |
pop ax |
inc al /* convert to 1=A, 2=B, etc */ |
mov [drv], al |
} |
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cmd_cd_curpathfordrv(buffptr, drv); |
outputnl(buffptr); |
|
return(-1); |
} |
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73,27 → 94,13 |
if ((arg[0] != '\\') && (arg[1] == ':') && (arg[2] == 0)) { |
unsigned char drive = arg[0]; |
if (drive >= 'a') { |
drive -= 'a'; |
drive -= ('a' - 1); |
} else { |
drive -= 'A'; |
drive -= ('A' - 1); |
} |
drive++; /* A: = 1, B: = 2, etc*/ |
_asm { |
push si |
push ax |
push dx |
mov ah, 0x47 /* get current directory */ |
mov dl, [drive] /* A: = 1, B: = 2, etc */ |
mov si, buffptr |
int 0x21 |
jnc DONE |
mov [err], ax |
DONE: |
pop dx |
pop ax |
pop si |
} |
if (err == 0) printf("%c:\\%s\r\n", drive + 'A' - 1, buffptr); |
|
err = cmd_cd_curpathfordrv(buffptr, drive); |
if (err == 0) outputnl(buffptr); |
} else { /* path */ |
_asm { |
push dx |