remove unwarranted entries

src/shims/unix/foreign_items.rs

@@ -61,13 +61,7 @@ pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
             // the machine's fd table does not start with a pre-allocated size but just the
             // standard streams so we can't use it here and the spec imposes
             // a minimum of `_POSIX_OPEN_MAX` (20).
-            ("_SC_OPEN_MAX", |this| Scalar::from_int(20, this.pointer_size())),
-            // The spec imposes a minimum of `_POSIX_ARG_MAX` (4096).
-            ("_SC_ARG_MAX", |this| Scalar::from_int(4096, this.pointer_size())),
-            // The spec imposes a minimum of `_POSIX_CHILD_MAX` (25).
-            ("_SC_CHILD_MAX", |this| Scalar::from_int(25, this.pointer_size())),
-            // 16 here is the least common denominator (i.e. macos, solarish).
-            ("_SC_NGROUPS_MAX", |this| Scalar::from_int(16, this.pointer_size())),
+            ("_SC_OPEN_MAX", |this| Scalar::from_int(65536, this.pointer_size())),
         ];
         for &(sysconf_name, value) in sysconfs {
             let sysconf_name = this.eval_libc_i32(sysconf_name);

tests/pass-dep/libc/libc-sysconf.rs

@@ -10,13 +10,7 @@ fn test_sysconfbasic() {
         let gwmax = libc::sysconf(libc::_SC_GETPW_R_SIZE_MAX);
         assert!(gwmax >= 512);
         let omax = libc::sysconf(libc::_SC_OPEN_MAX);
-        assert_eq!(omax, 20);
-        let amax = libc::sysconf(libc::_SC_ARG_MAX);
-        assert_eq!(amax, 4096);
-        let cmax = libc::sysconf(libc::_SC_CHILD_MAX);
-        assert_eq!(cmax, 25);
-        let nmax = libc::sysconf(libc::_SC_NGROUPS_MAX);
-        assert_eq!(nmax, 16);
+        assert_eq!(omax, 65536);
     }
 }