diff options
| author | Roland McGrath <roland@gnu.org> | 1996-01-04 21:37:22 +0000 |
|---|---|---|
| committer | Roland McGrath <roland@gnu.org> | 1996-01-04 21:37:22 +0000 |
| commit | b8c5df7a331c093244ca0f6c526bffd79033804e (patch) | |
| tree | 6cbe6c3b5a914a721b1c894617958a4eb7d6b345 /libdiskfs/io-write.c | |
| parent | 17b38815c288b437bf434857e46869e4ad3fff5f (diff) | |
Pass AMT read/write to _diskfs_rdwr_internal, and
return success if any bytes were written.
Diffstat (limited to 'libdiskfs/io-write.c')
| -rw-r--r-- | libdiskfs/io-write.c | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/libdiskfs/io-write.c b/libdiskfs/io-write.c index 38cf768f..ebfbf1b5 100644 --- a/libdiskfs/io-write.c +++ b/libdiskfs/io-write.c @@ -1,5 +1,5 @@ -/* - Copyright (C) 1994, 1995 Free Software Foundation +/* + Copyright (C) 1994, 95, 96 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as @@ -24,7 +24,7 @@ kern_return_t diskfs_S_io_write (struct protid *cred, char *data, mach_msg_type_number_t datalen, - off_t offset, + off_t offset, mach_msg_type_number_t *amt) { struct node *np; @@ -33,7 +33,7 @@ diskfs_S_io_write (struct protid *cred, if (!cred) return EOPNOTSUPP; - + np = cred->po->np; if (!(cred->po->openstat & O_WRITE)) return EBADF; @@ -43,14 +43,14 @@ diskfs_S_io_write (struct protid *cred, assert (!S_ISDIR(np->dn_stat.st_mode)); ioserver_get_conch (&np->conch); - + if (off == -1) { if (cred->po->openstat & O_APPEND) cred->po->filepointer = np->dn_stat.st_size; off = cred->po->filepointer; } - + err = 0; while (off + (off_t) datalen > np->allocsize) { @@ -60,7 +60,7 @@ diskfs_S_io_write (struct protid *cred, if (err) goto out; } - + if (off + (off_t) datalen > np->dn_stat.st_size) { np->dn_stat.st_size = off + datalen; @@ -70,8 +70,12 @@ diskfs_S_io_write (struct protid *cred, } *amt = datalen; - err = _diskfs_rdwr_internal (np, data, off, datalen, 1, 0); - + err = _diskfs_rdwr_internal (np, data, off, amt, 1, 0); + if (*amt) + /* If we wrote any, just return a short write count with no error; + the next write attempt will hit the error again and diagnose it. */ + err = 0; + if (!err && offset == -1) cred->po->filepointer += *amt; |