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- /* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If
- not, write to the Free Software Foundation, Inc., 675 Mass Ave,
- Cambridge, MA 02139, USA. */
-
- #include <ansidecl.h>
- #include <errno.h>
- #include <stdio.h>
- #include <hurd.h>
-
-
- /* XXX FILE * locking */
-
-
- /* Read up to N chars into BUF from COOKIE.
- Return how many chars were read, 0 for EOF or -1 for error. */
- int
- DEFUN(__stdio_read, (cookie, buf, n),
- PTR cookie AND register char *buf AND register size_t n)
- {
- size_t nread;
- error_t err;
- char *bufp = buf;
-
- if (err = __io_read ((io_t) cookie, /* XXX ctty */,
- &bufp, &nread, -1, n))
- return __hurd_fail (err);
-
- if (bufp != buf)
- {
- memcpy (buf, bufp, nread);
- __vm_deallocate (bufp, nread);
- }
-
- return nread;
- }
-
- /* Write up to N chars from BUF to COOKIE.
- Return how many chars were written or -1 for error. */
- int
- DEFUN(__stdio_write, (cookie, buf, n),
- PTR cookie AND register CONST char *buf AND register size_t n)
- {
- size_t wrote;
- error_t err;
-
- if (err = __io_write ((io_t) cookie, /* XXX ctty */,
- buf, n, -1, &wrote))
- return __hurd_fail (err);
-
- return wrote;
- }
-
- /* Move COOKIE's file position *POS bytes, according to WHENCE.
- The current file position is stored in *POS.
- Returns zero if successful, nonzero if not. */
- int
- DEFUN(__stdio_seek, (cookie, pos, whence),
- PTR cookie AND fpos_t *pos AND int whence)
- {
- error_t error = __file_seek ((file_t) cookie, *pos, whence, pos);
- if (error)
- return __hurd_fail (error);
- return 0;
- }
-
- /* Close the file associated with COOKIE.
- Return 0 for success or -1 for failure. */
- int
- DEFUN(__stdio_close, (cookie), PTR cookie)
- {
- if (__mach_port_deallocate (__mach_task_self (), (mach_port_t) cookie))
- {
- errno = EINVAL; /* ? */
- return -1;
- }
- return 0;
- }
-
-
- /* Open FILENAME with the mode in M.
- Return the magic cookie associated with the opened file
- or NULL which specifies that an integral descriptor may be
- found in *FDPTR. This descriptor is negative for errors. */
- PTR
- DEFUN(__stdio_open, (filename, m, fdptr),
- CONST char *filename AND __io_mode m AND int *fdptr)
- {
- int error;
- int flags;
- file_t file;
-
- flags = 0;
- if (m.__read)
- flags |= FS_LOOKUP_READ;
- if (m.__write)
- flags |= FS_LOOKUP_WRITE;
- if (m.__append)
- flags |= FS_LOOKUP_APPEND;
- if (m.__create)
- flags |= FS_LOOKUP_CREATE;
- if (m.__truncate)
- flags |= FS_LOOKUP_TRUNCATE;
- if (m.__exclusive)
- flags |= FS_LOOKUP_EXCL;
-
- file = __path_lookup (filename, flags, 0666 & ~_hurd_umask);
- if (file == MACH_PORT_NULL)
- {
- *fdptr = -1;
- return NULL;
- }
- return (PTR) file;
- }
-
-
- /* Write a message to the error output.
- Try hard to make it really get out. */
- void
- DEFUN(__stdio_errmsg, (msg, len), CONST char *msg AND size_t len)
- {
- io_t server;
- size_t wrote;
-
- server = __getdport (2);
- __io_write (server, 0, 0, 0, /* XXX ctty? */
- buf, n, -1, &wrote);
- __mach_port_deallocate (__mach_task_self (), server);
- }
-
-
- /* Generate a (hopefully) unique temporary filename
- in DIR (if applicable), using prefix PFX.
- If DIR_SEARCH is nonzero, perform directory searching
- malarky as per the SVID for tempnam.
- Return the generated filename or NULL if one could not
- be generated, putting the length of the string in *LENPTR. */
- char *
- DEFUN(__stdio_gen_tempname, (dir, pfx, dir_search, lenptr),
- CONST char *dir AND CONST char *pfx AND
- int dir_search AND size_t *lenptr)
- {
- char *name;
- error_t err;
- static file_t tmpserv = MACH_PORT_NULL;
-
- if (tmpserv == MACH_PORT_NULL)
- {
- tmpserv = __path_lookup (_SERVERS_TMPFILE, 0, 0);
- if (tmpserv == MACH_PORT_NULL)
- return NULL;
- }
-
- if (err = __tmpfile_generate_name (tmpserv, dir, pfx, getenv ("TMPDIR"),
- &name, lenptr))
- {
- errno = __hurd_errno (err);
- return NULL;
- }
- return name;
- }
-
- /* XXX _hurd_fork_hook to install stream ports. */
-
- static error_t
- fork_stdio (task_t newtask)
- {
- FILE *f;
-
- for (f = __stdio_head; f != NULL; f = f->next)
- if (f->__io_funcs.__close == __stdio_close &&
- (io_t) f->__cookie != MACH_PORT_NULL)
- {
- error_t err = __mach_port_insert_right (newtask,
- (io_t) f->__cookie,
- (io_t) f->__cookie,
- MACH_PORT_COPY_SEND);
- if (err)
- return err;
- }
- }
-