fix PATH_MAX with feature=term

src/fcntl.rs

@@ -189,15 +189,15 @@ libc_bitflags!(
     }
 );
 
-feature! {
-#![feature = "fs"]
-
 #[cfg(unix)]
 pub const PATH_MAX: usize = libc::PATH_MAX as usize;
 
 #[cfg(target_os = "wasi")]
 pub const PATH_MAX: usize = 4096; // max is whatever the host system is... so guess posix?
 
+feature! {
+#![feature = "fs"]
+
 // The conversion is not identical on all operating systems.
 #[allow(clippy::useless_conversion)]
 pub fn open<P: ?Sized + NixPath>(
@@ -318,7 +318,7 @@ fn inner_readlink<P: ?Sized + NixPath>(
     dirfd: Option<RawFd>,
     path: &P,
 ) -> Result<OsString> {
-    let mut v = Vec::with_capacity(PATH_MAX as usize);
+    let mut v = Vec::with_capacity(PATH_MAX);
 
     {
         // simple case: result is strictly less than `PATH_MAX`
@@ -371,7 +371,7 @@ fn inner_readlink<P: ?Sized + NixPath>(
         } else {
             // If lstat doesn't cooperate, or reports an error, be a little less
             // precise.
-            (PATH_MAX as usize).max(128) << 1
+            PATH_MAX.max(128) << 1
         }
     };
 

src/unistd.rs

@@ -1,14 +1,15 @@
 //! Safe wrappers around functions found in libc "unistd.h" header
 
 use crate::errno::{self, Errno};
+#[cfg(any(feature = "fs", feature = "term"))]
+use crate::fcntl::PATH_MAX;
 #[cfg(not(target_os = "redox"))]
 #[cfg(feature = "fs")]
 use crate::fcntl::{at_rawfd, AtFlags};
 #[cfg(not(target_os = "wasi"))]
 #[cfg(feature = "fs")]
-use crate::fcntl::{fcntl, FcntlArg::F_SETFD};
+use crate::fcntl::{fcntl, FcntlArg::F_SETFD, FdFlag, OFlag};
 #[cfg(feature = "fs")]
-use crate::fcntl::{FdFlag, OFlag, PATH_MAX};
 #[cfg(all(
     feature = "fs",
     any(