diff options
| author | Roland McGrath <roland@gnu.org> | 1995-09-17 22:06:56 +0000 |
|---|---|---|
| committer | Roland McGrath <roland@gnu.org> | 1995-09-17 22:06:56 +0000 |
| commit | a8b71d587f3a3ff6b0f15e38a332987aa77bdb03 (patch) | |
| tree | 31e82884f4f0bc74b8fcaf53412a9ae3ff329545 /libdiskfs/file-set-size.c | |
| parent | 5c141b1658fb39b940ba50859baab26219d79009 (diff) | |
Renamed from file-trunate.c.
(diskfs_S_file_set_size): Renamed from diskfs_s_file_truncate.
If SIZE exceeds the file size, extend the file.
Diffstat (limited to 'libdiskfs/file-set-size.c')
| -rw-r--r-- | libdiskfs/file-set-size.c | 29 |
1 files changed, 20 insertions, 9 deletions
diff --git a/libdiskfs/file-set-size.c b/libdiskfs/file-set-size.c index 06fc4671..f4d3f110 100644 --- a/libdiskfs/file-set-size.c +++ b/libdiskfs/file-set-size.c @@ -1,4 +1,4 @@ -/* libdiskfs implementation of fs.defs: file_truncate +/* libdiskfs implementation of fs.defs: file_set_size Copyright (C) 1992, 1993, 1994, 1995 Free Software Foundation This program is free software; you can redistribute it and/or @@ -19,16 +19,27 @@ #include "fs_S.h" #include <fcntl.h> -/* Implement file_truncate as described in <hurd/fs.defs>. */ +/* Implement file_set_size as described in <hurd/fs.defs>. */ kern_return_t -diskfs_S_file_truncate (struct protid *cred, +diskfs_S_file_set_size (struct protid *cred, off_t size) { CHANGE_NODE_FIELD (cred, - ({ - if (!(cred->po->openstat & O_WRITE)) - err = EINVAL; - else - err = diskfs_truncate (np, size); - })); + ({ + if (!(cred->po->openstat & O_WRITE)) + err = EINVAL; + else if (size < np->dn_stat.st_size) + err = diskfs_truncate (np, size); + else if (size > np->dn_stat.st_size) + { + err = diskfs_grow (np, size, cred); + if (! err) + { + np->dn_stat.st_size = size; + np->dn_set_ctime = np->dn_set_mtime = 1; + } + } + else + err = 0; /* Setting to same size. */ + })); } |