Changed to match and proper errno handling

Signed-off-by: higuruchi <fumiya2324@gmail.com>

crates/libcontainer/src/syscall/linux.rs

@@ -8,7 +8,7 @@ use std::{any::Any, mem, path::Path, ptr};
 
 use anyhow::{anyhow, bail, Context, Result};
 use caps::{CapSet, CapsHashSet};
-use libc::{c_char, uid_t, setdomainname, EFAULT, EINVAL, EPERM};
+use libc::{c_char, setdomainname, uid_t};
 use nix::fcntl;
 use nix::{
     errno::Errno,
@@ -204,17 +204,19 @@ impl Syscall for LinuxSyscall {
         let ptr = domainname.as_bytes().as_ptr() as *const c_char;
         let len = domainname.len();
         let res = unsafe { setdomainname(ptr, len) };
-        if res == EFAULT {
-            bail!("Failed to set {} as domainname. domainname pointed outside of user address space.", domainname)
-        }
-        if res == EINVAL {
-            bail!("Failed to set {} as domainname. domainname len was negative or too large.", domainname)
-        }
-        if res == EPERM {
-            bail!("Failed to set {} as domainname. the caller did not have the CAP_SYS_ADMIN capability.", domainname)
-        }
 
-        Ok(())
+        match res {
+            0 => Ok(()),
+            -1 => bail!(
+                "Failed to set {} as domainname. {}",
+                domainname,
+                std::io::Error::last_os_error()
+            ),
+            _ => bail!(
+                "Failed to set {} as domainname. unexpected error occor.",
+                domainname
+            ),
+        }
     }
 
     /// Sets resource limit for process