| 0,0 → 1,124 |
|---|
| /* |
| * chdir |
| * |
| * displays the name of or changes the current directory. |
| * |
| * CHDIR [drive:][path] |
| * CD.. |
| * |
| * Type CD drive: to display the current directory in the specified drive. |
| * Type CD without parameters to display the current drive and directory. |
| */ |
| |
| |
| /* 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); |
| } |
| |
| |
| static int cmd_cd(struct cmd_funcparam *p) { |
| char *buffptr = p->BUFFER; |
| |
| /* CD /? */ |
| if (cmd_ishlp(p)) { |
| outputnl("Displays the name of or changes the current directory."); |
| outputnl(""); |
| outputnl("CHDIR [drive:][path]"); |
| outputnl("CHDIR[..]"); |
| outputnl("CD [drive:][path]"); |
| outputnl("CD[..]"); |
| outputnl(""); |
| outputnl(".. Specifies that you want to change to the parent directory."); |
| outputnl(""); |
| outputnl("Type CD drive: to display the current directory in the specified drive."); |
| outputnl("Type CD without parameters to display the current drive and directory."); |
| return(-1); |
| } |
| |
| /* one argument max */ |
| if (p->argc > 1) { |
| outputnl("Too many parameters"); |
| return(-1); |
| } |
| |
| /* no argument? display current drive and dir ("CWD") */ |
| if (p->argc == 0) { |
| unsigned char drv = 0; |
| |
| _asm { |
| push ax |
| push dx |
| push si |
| mov ah, 0x19 /* get current default drive */ |
| int 0x21 /* al = drive (00h = A:, 01h = B:, etc) */ |
| inc al /* convert to 1=A, 2=B, etc */ |
| mov [drv], al |
| } |
| |
| cmd_cd_curpathfordrv(buffptr, drv); |
| outputnl(buffptr); |
| |
| return(-1); |
| } |
| |
| /* argument can be either a drive (D:) or a path */ |
| if (p->argc == 1) { |
| const char *arg = p->argv[0]; |
| unsigned short err = 0; |
| /* drive (CD B:) */ |
| if ((arg[0] != '\\') && (arg[1] == ':') && (arg[2] == 0)) { |
| unsigned char drive = arg[0]; |
| if (drive >= 'a') { |
| drive -= ('a' - 1); |
| } else { |
| drive -= ('A' - 1); |
| } |
| |
| err = cmd_cd_curpathfordrv(buffptr, drive); |
| if (err == 0) outputnl(buffptr); |
| } else { /* path */ |
| _asm { |
| push dx |
| push ax |
| mov ah, 0x3B /* CHDIR (set current directory) */ |
| mov dx, arg |
| int 0x21 |
| jnc DONE |
| mov [err], ax |
| DONE: |
| pop ax |
| pop dx |
| } |
| } |
| if (err != 0) { |
| outputnl(doserr(err)); |
| } |
| } |
| |
| return(-1); |
| } |