fix review comments

1 files changed, 7 insertions, 5 deletions

diff --git a/src/fcntl.rs b/src/fcntl.rs
index 2adbb6ab..1ef26271 100644
--- a/src/fcntl.rs
+++ b/src/fcntl.rs
@@ -188,19 +188,21 @@ fn wrap_readlink_result(v: &mut Vec<u8>, res: ssize_t) -> Result<OsString> {
 }
 
 pub fn readlink<'a, P: ?Sized + NixPath>(path: &P) -> Result<OsString> {
-    let mut v = vec![0u8; libc::PATH_MAX as usize];
+    let len = libc::PATH_MAX as usize;
+    let mut v = Vec::with_capacity(len);
     let res = path.with_nix_path(|cstr| {
-        unsafe { libc::readlink(cstr.as_ptr(), v.as_mut_ptr() as *mut c_char, v.len() as size_t) }
+        unsafe { libc::readlink(cstr.as_ptr(), v.as_mut_ptr() as *mut c_char, len as size_t) }
     })?;
-    
+
     wrap_readlink_result(&mut v, res)
 }
 
 
 pub fn readlinkat<'a, P: ?Sized + NixPath>(dirfd: RawFd, path: &P) -> Result<OsString> {
-    let mut v = vec![0u8; libc::PATH_MAX as usize];
+    let len = libc::PATH_MAX as usize;
+    let mut v = Vec::with_capacity(len);
     let res = path.with_nix_path(|cstr| {
-        unsafe { libc::readlinkat(dirfd, cstr.as_ptr(), v.as_mut_ptr() as *mut c_char, v.len() as size_t) }
+        unsafe { libc::readlinkat(dirfd, cstr.as_ptr(), v.as_mut_ptr() as *mut c_char, len as size_t) }
     })?;
 
     wrap_readlink_result(&mut v, res)