[components][dfs]添加ftruncate接口

2 files changed, 5 insertions, 0 deletions

diff --git a/components/dfs/include/dfs_file.h b/components/dfs/include/dfs_file.h
index aaff3f6e9c..2dfacd653e 100644
--- a/components/dfs/include/dfs_file.h
+++ b/components/dfs/include/dfs_file.h
@@ -66,6 +66,10 @@ int dfs_file_lseek(struct dfs_fd *fd, off_t offset);
 
 int dfs_file_stat(const char *path, struct stat *buf);
 int dfs_file_rename(const char *oldpath, const char *newpath);
+int dfs_file_ftruncate(struct dfs_fd *fd, off_t length);
+
+/* 0x5254 is just a magic number to make these relatively unique ("RT") */
+#define RT_FIOFTRUNCATE 0x52540000U
 
 #ifdef __cplusplus
 }
diff --git a/components/dfs/include/dfs_posix.h b/components/dfs/include/dfs_posix.h
index 9fd76debe2..87d5f0771e 100644
--- a/components/dfs/include/dfs_posix.h
+++ b/components/dfs/include/dfs_posix.h
@@ -58,6 +58,7 @@ int fstat(int fildes, struct stat *buf);
 int fsync(int fildes);
 int fcntl(int fildes, int cmd, ...);
 int ioctl(int fildes, int cmd, ...);
+int ftruncate(int fd, off_t length);
 
 /* directory api*/
 int rmdir(const char *path);