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vfs: add append mode to New_file

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genodelabs/genode#4352
This commit is contained in:
Johannes Schlatow 2021-08-02 17:17:28 +02:00 committed by Christian Helmuth
parent 2e266dfe3c
commit cf904e0a5d
1 changed files with 10 additions and 4 deletions
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14
repos/os/include/os/vfs.h
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@ -683,7 +683,9 @@ class Genode::New_file : Noncopyable
Vfs::File_system &_fs;
Vfs::Vfs_handle &_handle;
Vfs::Vfs_handle &_init_handle(Directory &dir, Directory::Path const &rel_path)
Vfs::Vfs_handle &_init_handle(Directory &dir,
Directory::Path const &rel_path,
bool append)
{
/* create compound directory */
{
@ -708,7 +710,11 @@ class Genode::New_file : Noncopyable
throw Create_failed();
}
handle_ptr->fs().ftruncate(handle_ptr, 0);
Vfs::Directory_service::Stat stat { };
if (!append)
handle_ptr->fs().ftruncate(handle_ptr, 0);
else if (handle_ptr->ds().stat(path.string(), stat) == Vfs::Directory_service::STAT_OK)
handle_ptr->seek(stat.size);
return *handle_ptr;
}
@ -720,10 +726,10 @@ class Genode::New_file : Noncopyable
*
* \throw Create_failed
*/
New_file(Directory &dir, Directory::Path const &path)
New_file(Directory &dir, Directory::Path const &path, bool append = false)
:
_ep(dir._ep), _alloc(dir._alloc), _fs(dir._fs),
_handle(_init_handle(dir, path))
_handle(_init_handle(dir, path, append))
{ }
~New_file()