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authorMichael I. Bushnell <mib@gnu.org>1996-07-04 21:29:55 +0000
committerMichael I. Bushnell <mib@gnu.org>1996-07-04 21:29:55 +0000
commite4f1c4fa49ed5a4147c834289d04cc3760c4373d (patch)
tree494bde009786bfee43696c6d6b10e824e45c6c8c
parentf53c1f3ef6f55f6a7f83d8ed3a11d9af9f413af3 (diff)
(netfs_S_io_write): Bother implementing O_APPEND.
-rw-r--r--libnetfs/io-write.c20
1 files changed, 18 insertions, 2 deletions
diff --git a/libnetfs/io-write.c b/libnetfs/io-write.c
index 81e47189..6c463c89 100644
--- a/libnetfs/io-write.c
+++ b/libnetfs/io-write.c
@@ -30,6 +30,7 @@ netfs_S_io_write (struct protid *user,
mach_msg_type_number_t *amount)
{
error_t err;
+ off_t off = offset;
if (!user)
return EOPNOTSUPP;
@@ -42,9 +43,24 @@ netfs_S_io_write (struct protid *user,
}
*amount = datalen;
+
+ if (off == -1)
+ {
+ if (user->po->openstat & O_APPEND)
+ {
+ err = netfs_validate_stat (np, user->po->np);
+ if (err)
+ {
+ mutex_unlock (&user->po->np->lock);
+ return err;
+ }
+ user->po->filepointer = np->nn_stat.st_size;
+ }
+ off = user->po->filepointer;
+ }
+
err = netfs_attempt_write (user->credential, user->po->np,
- offset == -1 ? user->po->filepointer : offset,
- amount, data);
+ off, amount, data);
if (offset == -1 && !err)
user->po->filepointer += *amount;
mutex_unlock (&user->po->np->lock);