diff options
Diffstat (limited to 'libc/msdos/msdos.c')
| -rw-r--r-- | libc/msdos/msdos.c | 96 |
1 files changed, 87 insertions, 9 deletions
diff --git a/libc/msdos/msdos.c b/libc/msdos/msdos.c index 2d23374..99e8835 100644 --- a/libc/msdos/msdos.c +++ b/libc/msdos/msdos.c @@ -11,6 +11,7 @@ #include <fcntl.h> #include <errno.h> int errno; +unsigned _doserrno; #ifdef L_dos_start @@ -279,6 +280,52 @@ static char buf1[66], buf2[66], *str = 0; } #endif +#ifdef L___exterror + +static char errno_xlate[] = { + 0, EINVAL, ENOENT, ENOENT, EMFILE, EACCES, EBADF, EFAULT, ENOMEM, + EFAULT, ENOMEM, EINVAL, EINVAL, EINVAL, EINVAL, ENODEV, EPERM, EXDEV, + ENFILE, EROFS, ENODEV, ENXIO, EINVAL, EIO, EINVAL, ESPIPE, EIO, EIO, + EAGAIN, EIO, EIO, EIO, EBUSY, EBUSY, ENODEV, EFAULT, ENOLCK, EFAULT, + EFAULT, ENOSPC +}; + +__exterror() +{ +#asm +export exterror +exterror: + push ds + push es + push di + push si + push bp + xor bx,bx + mov ah,#$59 + int $21 + pop bp + pop si + pop di + pop es + pop ds + mov __doserrno,ax +#endasm + { + int nerrno; + extern unsigned _doserrno; + + if( _doserrno == 0 ) + /* No error? No change. */; + else if( _doserrno >= sizeof(errno_xlate) + || errno_xlate[_doserrno] == EFAULT ) + errno = 16384+_doserrno; + else + errno = errno_xlate[_doserrno]; + } + return -1; +} +#endif + #ifdef L_dos_read int read(fd, ptr, len) @@ -294,7 +341,7 @@ unsigned len; mov ah,#$3f int #$21 jnc readok - mov ax,#-1 + br exterror readok: #endasm } @@ -315,7 +362,7 @@ unsigned len; mov ah,#$40 int #$21 jnc writeok - mov ax,#-1 + br exterror writeok: #endasm } @@ -342,7 +389,6 @@ int cmode; else /* Warn, this assumes the standard vals for O_RDWR, O_RDONLY, O_WRONLY */ rv = __dos_open(nname, type&O_ACCMODE); - if( rv < 0 ) errno=ENOENT; return rv; } @@ -355,7 +401,7 @@ __dos_open(fname, mode) mov ah,#$3d ;ask for a open int #$21 jnc openok ;return handle if no error - mov ax,#-1 ;return -1 if error + br exterror openok: #endasm } @@ -370,7 +416,7 @@ char * fname; mov ah,#$3c ;ask for a create int #$21 jnc creok ;return handle if no error - mov ax,#-1 ;return -1 if error + br exterror creok: #endasm } @@ -386,7 +432,7 @@ close(fd) int #$21 mov ax,0 ;return 0 if no error jnc closeok - mov ax,#-1 ;return -1 if error + br exterror closeok: #endasm } @@ -407,7 +453,7 @@ char * fname; int #$21 mov ax,0 ;assume no errors jnc unlok - mov ax,#-1 ;return -1 if error + br exterror unlok: #endasm } @@ -428,7 +474,7 @@ long offset; mov ah,#$42 int #$21 ;do the lseek jnc seekok - mov ax,#-1 ;return -1 if error + call exterror mov dx,ax seekok: #endasm @@ -527,7 +573,7 @@ __dos_getmod(fname) mov ax,#$4300 int #$21 jnc statok - mov cx,#-1 + br exterror statok: mov ax,cx #endasm @@ -588,6 +634,38 @@ not_tty: } #endif +#ifdef L_dos_abort +abort() +{ + write(2, "Abnormal program termination\r\n", 30); + _exit(3); +} +#endif + +#ifdef L_bdos +bdos(dosfn, dosdx, dosal) +int dosfn; +unsigned dosdx, dosal; +{ +#asm +_bdosptr = _bdos + mov bx,sp + push si + push di + + mov dx,_bdos.dosdx[bx] + mov cx,_bdos.dosfn[bx] + mov ax,_bdos.dosal[bx] + mov ah,cl + + int $21 + + pop di + pop si +#endasm +} +#endif + #endif /* __MSDOS__ */ #endif /* __AS386_16__ */ #endif /* !__FIRST_ARG_IN_AX__ */ |