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authorMichael I. Bushnell <mib@gnu.org>1995-11-13 21:27:25 +0000
committerMichael I. Bushnell <mib@gnu.org>1995-11-13 21:27:25 +0000
commit275ead4b88aae34642eba6f6e37cbdfed61e47d8 (patch)
tree41281aacbc1a4de55dd158123f0548d14f3b5ee3 /libnetfs
parent8175bddaad6a2f144d822eecd7c9b038d9e034d7 (diff)
Initial revision
Diffstat (limited to 'libnetfs')
-rw-r--r--libnetfs/io-readable.c37
-rw-r--r--libnetfs/io-seek.c56
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;
+}