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- /* Copyright (C) 1995 DJ Delorie, see COPYING.DJ for details */
- #include <libc/stubs.h>
- #include <unistd.h>
- #include <errno.h>
- #include <fcntl.h>
- #include <go32.h>
- #include <ctype.h>
- #include <dpmi.h>
- #include <libc/dosio.h>
-
- int
- __chdir (const char *dirname)
- {
- __dpmi_regs r;
-
- if (dirname == 0)
- {
- errno = EINVAL;
- return -1;
- }
-
- if (dirname[0] == 0)
- {
- errno = ENOENT;
- return -1;
- }
-
- if (dirname[1] != ':' || dirname[2])
- {
- if(_USE_LFN)
- r.x.ax = 0x713b;
- else
- r.h.ah = 0x3b;
- r.x.dx = __tb_offset;
- r.x.ds = __tb_segment;
- _put_path(dirname);
- __dpmi_int(0x21, &r);
- if(r.x.flags & 1)
- {
- errno = __doserr_to_errno(r.x.ax);
- return -1;
- }
- }
-
- if (dirname[1] == ':')
- {
- /* Change current drive also. This *will* work if
- the directory change above worked. */
- r.h.ah = 0x0e;
- r.h.dl = (dirname[0] & 0x1f) - 1;
- __dpmi_int(0x21, &r);
- }
-
- return 0;
- }
-