From 78d7aea35ef838a88d85a79a0acf36c5506d76ed Mon Sep 17 00:00:00 2001
From: jr <semi1@posteo.de>
Date: Fri, 19 Apr 2019 23:52:59 +0200
Subject: Add a access(2) wrapper

---
 src/unistd.rs | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

(limited to 'src/unistd.rs')

diff --git a/src/unistd.rs b/src/unistd.rs
index c3b2b61e..f855c0af 100644
--- a/src/unistd.rs
+++ b/src/unistd.rs
@@ -2334,3 +2334,28 @@ mod setres {
         Errno::result(res).map(drop)
     }
 }
+
+libc_bitflags!{
+    /// Options for access()
+    pub struct AccessFlags : c_int {
+        /// Test for existence of file.
+        F_OK;
+        /// Test for read permission.
+        R_OK;
+        /// Test for write permission.
+        W_OK;
+        /// Test for execute (search) permission.
+        X_OK;
+    }
+}
+
+/// Checks the file named by `path` for accessibility according to the flags given by `amode`
+/// See [access(2)](http://pubs.opengroup.org/onlinepubs/9699919799/functions/access.html)
+pub fn access<P: ?Sized + NixPath>(path: &P, amode: AccessFlags) -> Result<()> {
+    let res = path.with_nix_path(|cstr| {
+        unsafe {
+            libc::access(cstr.as_ptr(), amode.bits)
+        }
+    })?;
+    Errno::result(res).map(drop)
+}
-- 
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