/* Copyright (C) 1994,95,97,2000 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include <hurd.h> #include <stdio.h> #include <fcntl.h> #include <string.h> /* Read up to N chars into BUF from COOKIE. Return how many chars were read, 0 for EOF or -1 for error. */ static ssize_t readio (void *cookie, char *buf, size_t n) { mach_msg_type_number_t nread; error_t err; char *bufp = buf; nread = n; if (err = __io_read ((io_t) cookie, &bufp, &nread, -1, n)) return __hurd_fail (err); if (bufp != buf) { memcpy (buf, bufp, nread); __vm_deallocate (__mach_task_self (), (vm_address_t) bufp, (vm_size_t) nread); } return nread; } /* Write up to N chars from BUF to COOKIE. Return how many chars were written or -1 for error. */ static ssize_t writeio (void *cookie, const char *buf, size_t n) { mach_msg_type_number_t wrote; error_t err; if (err = __io_write ((io_t) cookie, 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. */ static int seekio (void *cookie, off_t *pos, int whence) { off_t res; error_t error = __io_seek ((file_t) cookie, *pos, whence, &res); if (error) return __hurd_fail (error); *pos = res; return 0; } /* Close the file associated with COOKIE. Return 0 for success or -1 for failure. */ static int closeio (void *cookie) { error_t error = __mach_port_deallocate (__mach_task_self (), (mach_port_t) cookie); if (error) return __hurd_fail (error); return 0; } #ifndef USE_IN_LIBIO #define cookie_io_functions_t __io_functions #endif static const cookie_io_functions_t funcsio = { readio, writeio, seekio, closeio }; /* Open a stream on PORT. MODE is as for fopen. */ FILE * fopenport (mach_port_t port, const char *mode) { int pflags; int needflags; error_t err; const char *m = mode; switch (*m++) { case 'r': needflags = O_READ; break; case 'w': needflags = O_WRITE; break; case 'a': needflags = O_WRITE|O_APPEND; break; default: return NULL; } if (m[0] == '+' || (m[0] == 'b' && m[1] == '+')) needflags |= O_RDWR; /* Verify the PORT is valid allows the access MODE specifies. */ if (err = __io_get_openmodes (port, &pflags)) return __hurd_fail (err), NULL; /* Check the access mode. */ if ((pflags & needflags) != needflags) { errno = EBADF; return NULL; } return fopencookie ((void *) port, mode, funcsio); }