diff options
| -rw-r--r-- | libnetfs/io-readable.c | 37 | ||||
| -rw-r--r-- | libnetfs/io-seek.c | 56 |
2 files changed, 93 insertions, 0 deletions
diff --git a/libnetfs/io-readable.c b/libnetfs/io-readable.c new file mode 100644 index 00000000..8169f715 --- /dev/null +++ b/libnetfs/io-readable.c @@ -0,0 +1,37 @@ +/* + Copyright (C) 1995 Free Software Foundation, Inc. + Written by Michael I. Bushnell, p/BSG. + + This file is part of the GNU Hurd. + + The GNU Hurd is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License as + published by the Free Software Foundation; either version 2, or (at + your option) any later version. + + The GNU Hurd 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 + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */ + +#include "netfs.h" + +error_t +netfs_S_io_readable (struct protid *user, + mach_msg_type_number_t *amount) +{ + if (!user) + return EOPNOTSUPP; + + if (!(cred->po->openstat & O_READ)) + return EINVAL; + + mutex_lock (&user->po->np->lock); + *amount = user->po->np->nn_stat.st_size - user->po->filepointer; + mutex_unlock (&user->po->np->lock); + return 0; +} diff --git a/libnetfs/io-seek.c b/libnetfs/io-seek.c new file mode 100644 index 00000000..63454ac7 --- /dev/null +++ b/libnetfs/io-seek.c @@ -0,0 +1,56 @@ +/* + Copyright (C) 1995 Free Software Foundation, Inc. + Written by Michael I. Bushnell, p/BSG. + + This file is part of the GNU Hurd. + + The GNU Hurd is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License as + published by the Free Software Foundation; either version 2, or (at + your option) any later version. + + The GNU Hurd 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 + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */ + +#include "netfs.h" + +error_t +netfs_S_io_seek (struct protid *user, + off_t offset, + int whence, + off_t *newoffset) +{ + if (!user) + return EOPNOTSUPP; + + mutex_lock (&user->po->np->lock); + switch (whence) + { + case SEEK_SET: + err = 0; + cred->po->filepointer = offset; + break; + + case SEEK_CUR: + err = 0; + cred->po->filepointer += offset; + break; + + case SEEK_END: + err = 0; + cred->po->filepointer = cred->po->np->nn_stat.st_size + offset; + break; + + default: + err = EINVAL; + break; + } + mutex_unlock (&user->po->np->lock); + return err; +} |