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VFS: check path on the symlink node readlink 

Fixes #1790
This commit is contained in:
Emery Hemingway 2015-11-24 15:12:47 +01:00 committed by Christian Helmuth
parent 44cfc414ee
commit ee25dcbae3
1 changed files with 5 additions and 1 deletions
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6
repos/os/include/vfs/symlink_file_system.h
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@ -66,6 +66,8 @@ class Vfs::Symlink_file_system : public File_system
file_size buf_size,
file_size &out_len) override
{
if (!_is_single_file(path))
return READLINK_ERR_NO_ENTRY;
out_len = min(buf_size, file_size(sizeof(_target)));
strncpy(buf, _target, out_len);
return READLINK_OK;
@ -104,7 +106,7 @@ class Vfs::Symlink_file_system : public File_system
char const *leaf_path(char const *path) override
{
return path;
return _is_single_file(path) ? path : 0;
}
Dirent_result dirent(char const *path, file_offset index, Dirent &out) override
@ -112,11 +114,13 @@ class Vfs::Symlink_file_system : public File_system
if (!_is_root(path))
return DIRENT_ERR_INVALID_PATH;
out.fileno = 1;
if (index == 0) {
out.type = DIRENT_TYPE_SYMLINK;
strncpy(out.name, _filename, sizeof(out.name));
} else {
out.type = DIRENT_TYPE_END;
out.name[0] = '\0';
}
return DIRENT_OK;