diff --git a/sandboxed_api/sandbox2/BUILD.bazel b/sandboxed_api/sandbox2/BUILD.bazel
index fb27b8b..3f84537 100644
--- a/sandboxed_api/sandbox2/BUILD.bazel
+++ b/sandboxed_api/sandbox2/BUILD.bazel
@@ -291,6 +291,7 @@ cc_library(
         "//sandboxed_api/util:status",
         "@com_google_absl//absl/base:core_headers",
         "@com_google_absl//absl/memory",
+        "@com_google_absl//absl/status",
         "@com_google_absl//absl/strings",
         "@com_google_absl//absl/types:span",
     ],
@@ -408,7 +409,6 @@ cc_library(
         "//sandboxed_api/util:fileops",
         "//sandboxed_api/util:raw_logging",
         "//sandboxed_api/util:status",
-        "//sandboxed_api/util:strerror",
         "@com_google_absl//absl/base:core_headers",
         "@com_google_absl//absl/container:flat_hash_set",
         "@com_google_absl//absl/status",
diff --git a/sandboxed_api/sandbox2/CMakeLists.txt b/sandboxed_api/sandbox2/CMakeLists.txt
index e3ab21d..74416bd 100644
--- a/sandboxed_api/sandbox2/CMakeLists.txt
+++ b/sandboxed_api/sandbox2/CMakeLists.txt
@@ -282,6 +282,7 @@ target_link_libraries(sandbox2_executor
           sapi::base
           sapi::status_proto
   PUBLIC absl::span
+         absl::status
          absl::strings
          glog::glog
          sapi::config
diff --git a/sandboxed_api/sandbox2/buffer.cc b/sandboxed_api/sandbox2/buffer.cc
index 3011f39..eef7198 100644
--- a/sandboxed_api/sandbox2/buffer.cc
+++ b/sandboxed_api/sandbox2/buffer.cc
@@ -25,7 +25,6 @@
 #include "absl/status/statusor.h"
 #include "absl/strings/str_cat.h"
 #include "sandboxed_api/sandbox2/util.h"
-#include "sandboxed_api/util/os_error.h"
 
 namespace sandbox2 {
 
@@ -35,8 +34,7 @@ absl::StatusOr<std::unique_ptr<Buffer>> Buffer::CreateFromFd(int fd) {
 
   struct stat stat_buf;
   if (fstat(fd, &stat_buf) != 0) {
-    return absl::InternalError(
-        sapi::OsErrorMessage(errno, "Could not stat buffer fd"));
+    return absl::ErrnoToStatus(errno, "Could not stat buffer fd");
   }
   size_t size = stat_buf.st_size;
   int prot = PROT_READ | PROT_WRITE;
@@ -45,8 +43,7 @@ absl::StatusOr<std::unique_ptr<Buffer>> Buffer::CreateFromFd(int fd) {
   buffer->buf_ =
       reinterpret_cast<uint8_t*>(mmap(nullptr, size, prot, flags, fd, offset));
   if (buffer->buf_ == MAP_FAILED) {
-    return absl::InternalError(
-        sapi::OsErrorMessage(errno, "Could not map buffer fd"));
+    return absl::ErrnoToStatus(errno, "Could not map buffer fd");
   }
   buffer->fd_ = fd;
   buffer->size_ = size;
@@ -61,8 +58,7 @@ absl::StatusOr<std::unique_ptr<Buffer>> Buffer::CreateWithSize(size_t size) {
     return absl::InternalError("Could not create buffer temp file");
   }
   if (ftruncate(fd, size) != 0) {
-    return absl::InternalError(
-        sapi::OsErrorMessage(errno, "Could not extend buffer fd"));
+    return absl::ErrnoToStatus(errno, "Could not extend buffer fd");
   }
   return CreateFromFd(fd);
 }
diff --git a/sandboxed_api/sandbox2/examples/network_proxy/networkproxy_bin.cc b/sandboxed_api/sandbox2/examples/network_proxy/networkproxy_bin.cc
index c62bad7..bf47e84 100644
--- a/sandboxed_api/sandbox2/examples/network_proxy/networkproxy_bin.cc
+++ b/sandboxed_api/sandbox2/examples/network_proxy/networkproxy_bin.cc
@@ -20,7 +20,6 @@
 #include "sandboxed_api/sandbox2/comms.h"
 #include "sandboxed_api/sandbox2/network_proxy/client.h"
 #include "sandboxed_api/util/fileops.h"
-#include "sandboxed_api/util/os_error.h"
 #include "sandboxed_api/util/status_macros.h"
 
 ABSL_FLAG(bool, connect_with_handler, true, "Connect using automatic mode.");
@@ -64,9 +63,8 @@ absl::StatusOr<struct sockaddr_in6> CreateAddres(int port) {
   saddr.sin6_family = AF_INET6;
   saddr.sin6_port = htons(port);
 
-  int err = inet_pton(AF_INET6, "::1", &saddr.sin6_addr);
-  if (err <= 0) {
-    return absl::InternalError(sapi::OsErrorMessage(errno, "socket() failed"));
+  if (int err = inet_pton(AF_INET6, "::1", &saddr.sin6_addr); err <= 0) {
+    return absl::ErrnoToStatus(errno, "socket()");
   }
   return saddr;
 }
@@ -91,7 +89,7 @@ absl::StatusOr<int> ConnectToServer(int port) {
 
   sapi::file_util::fileops::FDCloser s(socket(AF_INET6, SOCK_STREAM, 0));
   if (s.get() < 0) {
-    return absl::InternalError(sapi::OsErrorMessage(errno, "socket() failed"));
+    return absl::ErrnoToStatus(errno, "socket()");
   }
 
   if (absl::GetFlag(FLAGS_connect_with_handler)) {
diff --git a/sandboxed_api/sandbox2/executor.cc b/sandboxed_api/sandbox2/executor.cc
index 9286379..e016487 100644
--- a/sandboxed_api/sandbox2/executor.cc
+++ b/sandboxed_api/sandbox2/executor.cc
@@ -26,6 +26,7 @@
 #include <string_view>
 
 #include "absl/memory/memory.h"
+#include "absl/status/status.h"
 #include "absl/strings/match.h"
 #include "absl/strings/str_cat.h"
 #include "absl/strings/string_view.h"
@@ -36,7 +37,6 @@
 #include "sandboxed_api/sandbox2/ipc.h"
 #include "sandboxed_api/sandbox2/util.h"
 #include "sandboxed_api/util/fileops.h"
-#include "sandboxed_api/util/os_error.h"
 
 namespace sandbox2 {
 
@@ -92,10 +92,10 @@ absl::StatusOr<Executor::Process> Executor::StartSubProcess(
     exec_fd_ = file_util::fileops::FDCloser(open(path_.c_str(), O_PATH));
     if (exec_fd_.get() < 0) {
       if (errno == ENOENT) {
-        return absl::NotFoundError(sapi::OsErrorMessage(errno, path_));
+        return absl::ErrnoToStatus(errno, path_);
       }
-      return absl::InternalError(
-          sapi::OsErrorMessage(errno, "Could not open file ", path_));
+      return absl::ErrnoToStatus(errno,
+                                 absl::StrCat("Could not open file ", path_));
     }
   }
 
@@ -159,8 +159,8 @@ absl::StatusOr<Executor::Process> Executor::StartSubProcess(
         absl::StrCat("/proc/", libunwind_sbox_for_pid_, "/ns/user");
     ns_fd = file_util::fileops::FDCloser(open(ns_path.c_str(), O_RDONLY));
     if (ns_fd.get() == -1) {
-      return absl::InternalError(sapi::OsErrorMessage(
-          errno, "Could not open user ns fd (", ns_path, ")"));
+      return absl::ErrnoToStatus(
+          errno, absl::StrCat("Could not open user ns fd (", ns_path, ")"));
     }
   }
 
diff --git a/sandboxed_api/sandbox2/forkserver.cc b/sandboxed_api/sandbox2/forkserver.cc
index bda5593..de64732 100644
--- a/sandboxed_api/sandbox2/forkserver.cc
+++ b/sandboxed_api/sandbox2/forkserver.cc
@@ -59,7 +59,6 @@
 #include "sandboxed_api/sandbox2/util.h"
 #include "sandboxed_api/sandbox2/util/bpf_helper.h"
 #include "sandboxed_api/util/fileops.h"
-#include "sandboxed_api/util/os_error.h"
 #include "sandboxed_api/util/raw_logging.h"
 #include "sandboxed_api/util/strerror.h"
 
@@ -172,8 +171,7 @@ absl::Status SendPid(int signaling_fd) {
   // on the socket.
   char dummy = ' ';
   if (TEMP_FAILURE_RETRY(send(signaling_fd, &dummy, 1, 0)) != 1) {
-    return absl::InternalError(
-        sapi::OsErrorMessage(errno, "Sending PID: send()"));
+    return absl::ErrnoToStatus(errno, "Sending PID: send()");
   }
   return absl::OkStatus();
 }
@@ -197,15 +195,14 @@ absl::StatusOr<pid_t> ReceivePid(int signaling_fd) {
   iov.iov_len = sizeof(char);
 
   if (TEMP_FAILURE_RETRY(recvmsg(signaling_fd, &msgh, MSG_WAITALL)) != 1) {
-    return absl::InternalError(
-        sapi::OsErrorMessage(errno, "Receiving pid failed: recvmsg"));
+    return absl::ErrnoToStatus(errno, "Receiving pid failed: recvmsg");
   }
   struct cmsghdr* cmsgp = CMSG_FIRSTHDR(&msgh);
   if (cmsgp->cmsg_len != CMSG_LEN(sizeof(struct ucred)) ||
       cmsgp->cmsg_level != SOL_SOCKET || cmsgp->cmsg_type != SCM_CREDENTIALS) {
     return absl::InternalError("Receiving pid failed");
   }
-  struct ucred* ucredp = reinterpret_cast<struct ucred*>(CMSG_DATA(cmsgp));
+  auto* ucredp = reinterpret_cast<struct ucred*>(CMSG_DATA(cmsgp));
   return ucredp->pid;
 }
 
diff --git a/sandboxed_api/sandbox2/global_forkclient.cc b/sandboxed_api/sandbox2/global_forkclient.cc
index db7fb87..b00a7f2 100644
--- a/sandboxed_api/sandbox2/global_forkclient.cc
+++ b/sandboxed_api/sandbox2/global_forkclient.cc
@@ -47,7 +47,6 @@
 #include "sandboxed_api/sandbox2/forkserver_bin_embed.h"
 #include "sandboxed_api/sandbox2/util.h"
 #include "sandboxed_api/util/fileops.h"
-#include "sandboxed_api/util/os_error.h"
 #include "sandboxed_api/util/raw_logging.h"
 #include "sandboxed_api/util/status_macros.h"
 
@@ -139,9 +138,9 @@ absl::StatusOr<std::unique_ptr<GlobalForkClient>> StartGlobalForkServer() {
   if (exec_fd < 0) {
     // For Android we expect the forkserver_bin in the flag
     if constexpr (sapi::host_os::IsAndroid()) {
-      return absl::InternalError(sapi::OsErrorMessage(
+      return absl::ErrnoToStatus(
           errno,
-          "Open init binary passed via --sandbox2_forkserver_binary_path"));
+          "Open init binary passed via --sandbox2_forkserver_binary_path");
     }
     // Extract the fd when it's owned by EmbedFile
     exec_fd = sapi::EmbedFile::instance()->GetDupFdForFileToc(
@@ -156,15 +155,13 @@ absl::StatusOr<std::unique_ptr<GlobalForkClient>> StartGlobalForkServer() {
 
   int sv[2];
   if (socketpair(AF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0, sv) == -1) {
-    return absl::InternalError(
-        sapi::OsErrorMessage(errno, "Creating socket pair failed"));
+    return absl::ErrnoToStatus(errno, "Creating socket pair failed");
   }
 
   // Fork the fork-server, and clean-up the resources (close remote sockets).
   pid_t pid = util::ForkWithFlags(SIGCHLD);
   if (pid == -1) {
-    return absl::InternalError(
-        sapi::OsErrorMessage(errno, "Forking forkserver process failed"));
+    return absl::ErrnoToStatus(errno, "Forking forkserver process failed");
   }
 
   // Child.
diff --git a/sandboxed_api/sandbox2/network_proxy/client.cc b/sandboxed_api/sandbox2/network_proxy/client.cc
index c4d246f..84a1001 100644
--- a/sandboxed_api/sandbox2/network_proxy/client.cc
+++ b/sandboxed_api/sandbox2/network_proxy/client.cc
@@ -28,7 +28,6 @@
 #include "absl/status/status.h"
 #include "absl/strings/str_cat.h"
 #include "sandboxed_api/config.h"
-#include "sandboxed_api/util/os_error.h"
 #include "sandboxed_api/util/status_macros.h"
 
 namespace sandbox2 {
@@ -120,8 +119,7 @@ absl::Status NetworkProxyClient::ReceiveRemoteResult() {
   }
   if (result != 0) {
     errno = result;
-    return absl::InternalError(
-        sapi::OsErrorMessage(errno, "Error in network proxy server"));
+    return absl::ErrnoToStatus(errno, "Error in network proxy server");
   }
   return absl::OkStatus();
 }
diff --git a/sandboxed_api/sandbox2/network_proxy/filtering.cc b/sandboxed_api/sandbox2/network_proxy/filtering.cc
index 230b82a..ea6e461 100644
--- a/sandboxed_api/sandbox2/network_proxy/filtering.cc
+++ b/sandboxed_api/sandbox2/network_proxy/filtering.cc
@@ -23,7 +23,6 @@
 #include "absl/strings/numbers.h"
 #include "absl/strings/str_cat.h"
 #include "absl/strings/str_split.h"
-#include "sandboxed_api/util/os_error.h"
 #include "sandboxed_api/util/status_macros.h"
 
 namespace sandbox2 {
@@ -66,15 +65,12 @@ absl::StatusOr<std::string> AddrToString(const struct sockaddr* saddr) {
 
 static absl::Status IPStringToAddr(const std::string& ip, int address_family,
                                    void* addr) {
-  int err = inet_pton(address_family, ip.c_str(), addr);
-  if (err == 0) {
+  if (int err = inet_pton(address_family, ip.c_str(), addr); err == 0) {
     return absl::InvalidArgumentError(absl::StrCat("Invalid address: ", ip));
+  } else if (err == -1) {
+    return absl::ErrnoToStatus(errno,
+                               absl::StrCat("inet_pton() failed for ", ip));
   }
-  if (err == -1) {
-    return absl::InternalError(sapi::OsErrorMessage(
-        errno, absl::StrCat("inet_pton() failed for ", ip)));
-  }
-
   return absl::OkStatus();
 }
 
diff --git a/sandboxed_api/sandbox2/regs.cc b/sandboxed_api/sandbox2/regs.cc
index f655c51..4d1eee5 100644
--- a/sandboxed_api/sandbox2/regs.cc
+++ b/sandboxed_api/sandbox2/regs.cc
@@ -27,7 +27,6 @@
 #include "absl/status/status.h"
 #include "absl/strings/str_cat.h"
 #include "sandboxed_api/config.h"
-#include "sandboxed_api/util/os_error.h"
 
 namespace sandbox2 {
 
@@ -38,8 +37,8 @@ namespace sandbox2 {
 absl::Status Regs::Fetch() {
 #ifdef SAPI_X86_64
   if (ptrace(PTRACE_GETREGS, pid_, 0, &user_regs_) == -1L) {
-    return absl::InternalError(sapi::OsErrorMessage(
-        errno, absl::StrCat("ptrace(PTRACE_GETREGS, pid=", pid_, ") failed")));
+    return absl::ErrnoToStatus(
+        errno, absl::StrCat("ptrace(PTRACE_GETREGS, pid=", pid_, ") failed"));
   }
 #endif
   if constexpr (sapi::host_cpu::IsPPC64LE() || sapi::host_cpu::IsArm64() ||
@@ -47,9 +46,9 @@ absl::Status Regs::Fetch() {
     iovec pt_iov = {&user_regs_, sizeof(user_regs_)};
 
     if (ptrace(PTRACE_GETREGSET, pid_, NT_PRSTATUS, &pt_iov) == -1L) {
-      return absl::InternalError(sapi::OsErrorMessage(
+      return absl::ErrnoToStatus(
           errno,
-          absl::StrCat("ptrace(PTRACE_GETREGSET, pid=", pid_, ") failed")));
+          absl::StrCat("ptrace(PTRACE_GETREGSET, pid=", pid_, ") failed"));
     }
     if (pt_iov.iov_len != sizeof(user_regs_)) {
       return absl::InternalError(absl::StrCat(
@@ -63,9 +62,9 @@ absl::Status Regs::Fetch() {
       iovec sys_iov = {&syscall_number_, sizeof(syscall_number_)};
 
       if (ptrace(PTRACE_GETREGSET, pid_, NT_ARM_SYSTEM_CALL, &sys_iov) == -1L) {
-        return absl::InternalError(sapi::OsErrorMessage(
+        return absl::ErrnoToStatus(
             errno, absl::StrCat("ptrace(PTRACE_GETREGSET, pid=", pid_,
-                                ", NT_ARM_SYSTEM_CALL)")));
+                                ", NT_ARM_SYSTEM_CALL)"));
       }
       if (sys_iov.iov_len != sizeof(syscall_number_)) {
         return absl::InternalError(absl::StrCat(
@@ -82,8 +81,8 @@ absl::Status Regs::Fetch() {
 absl::Status Regs::Store() {
 #ifdef SAPI_X86_64
   if (ptrace(PTRACE_SETREGS, pid_, 0, &user_regs_) == -1) {
-    return absl::InternalError(sapi::OsErrorMessage(
-        errno, absl::StrCat("ptrace(PTRACE_SETREGS, pid=", pid_, ")")));
+    return absl::ErrnoToStatus(
+        errno, absl::StrCat("ptrace(PTRACE_SETREGS, pid=", pid_, ")"));
   }
 #endif
   if constexpr (sapi::host_cpu::IsPPC64LE() || sapi::host_cpu::IsArm64() ||
@@ -91,9 +90,9 @@ absl::Status Regs::Store() {
     iovec pt_iov = {&user_regs_, sizeof(user_regs_)};
 
     if (ptrace(PTRACE_SETREGSET, pid_, NT_PRSTATUS, &pt_iov) == -1L) {
-      return absl::InternalError(sapi::OsErrorMessage(
+      return absl::ErrnoToStatus(
           errno,
-          absl::StrCat("ptrace(PTRACE_SETREGSET, pid=", pid_, ") failed")));
+          absl::StrCat("ptrace(PTRACE_SETREGSET, pid=", pid_, ") failed"));
     }
 
     // Store syscall number on AArch64.
@@ -101,9 +100,9 @@ absl::Status Regs::Store() {
       iovec sys_iov = {&syscall_number_, sizeof(syscall_number_)};
 
       if (ptrace(PTRACE_SETREGSET, pid_, NT_ARM_SYSTEM_CALL, &sys_iov) == -1L) {
-        return absl::InternalError(sapi::OsErrorMessage(
+        return absl::ErrnoToStatus(
             errno, absl::StrCat("ptrace(PTRACE_SETREGSET, pid=", pid_,
-                                ", NT_ARM_SYSTEM_CALL) failed")));
+                                ", NT_ARM_SYSTEM_CALL) failed"));
       }
     }
   }
diff --git a/sandboxed_api/sandbox2/sanitizer.cc b/sandboxed_api/sandbox2/sanitizer.cc
index bc5988d..68cca60 100644
--- a/sandboxed_api/sandbox2/sanitizer.cc
+++ b/sandboxed_api/sandbox2/sanitizer.cc
@@ -16,6 +16,8 @@
 
 #include "sandboxed_api/sandbox2/sanitizer.h"
 
+#include "absl/status/status.h"
+
 #if defined(ABSL_HAVE_ADDRESS_SANITIZER) ||   \
     defined(ABSL_HAVE_HWADDRESS_SANITIZER) || \
     defined(ABSL_HAVE_LEAK_SANITIZER) ||      \
@@ -45,10 +47,8 @@
 #include "sandboxed_api/sandbox2/util.h"
 #include "sandboxed_api/util/file_helpers.h"
 #include "sandboxed_api/util/fileops.h"
-#include "sandboxed_api/util/os_error.h"
 #include "sandboxed_api/util/raw_logging.h"
 #include "sandboxed_api/util/status_macros.h"
-#include "sandboxed_api/util/strerror.h"
 
 namespace sandbox2::sanitizer {
 namespace {
@@ -126,12 +126,13 @@ absl::Status MarkAllFDsAsCOEExcept(
 
     int flags = fcntl(fd, F_GETFD);
     if (flags == -1) {
-      return absl::InternalError(
-          sapi::OsErrorMessage(errno, "fcntl(", fd, ", F_GETFD) failed"));
+      return absl::ErrnoToStatus(
+          errno, absl::StrCat("fcntl(", fd, ", F_GETFD) failed"));
     }
     if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1) {
-      return absl::InternalError(sapi::OsErrorMessage(
-          errno, "fcntl(", fd, ", F_SETFD, ", flags, " | FD_CLOEXEC) failed"));
+      return absl::ErrnoToStatus(
+          errno, absl::StrCat("fcntl(", fd, ", F_SETFD, ", flags,
+                              " | FD_CLOEXEC) failed"));
     }
   }
 
@@ -184,8 +185,8 @@ absl::Status SanitizeCurrentProcess(
 
   // If the parent goes down, so should we.
   if (prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0) != 0) {
-    return absl::InternalError(
-        sapi::OsErrorMessage(errno, "prctl(PR_SET_PDEATHSIG, SIGKILL) failed"));
+    return absl::ErrnoToStatus(errno,
+                               "prctl(PR_SET_PDEATHSIG, SIGKILL) failed");
   }
 
   // Close or mark as close-on-exec open file descriptors.
diff --git a/sandboxed_api/sandbox2/util.cc b/sandboxed_api/sandbox2/util.cc
index 3ade7b5..e3cafdb 100644
--- a/sandboxed_api/sandbox2/util.cc
+++ b/sandboxed_api/sandbox2/util.cc
@@ -50,7 +50,6 @@
 #include "sandboxed_api/config.h"
 #include "sandboxed_api/util/file_helpers.h"
 #include "sandboxed_api/util/fileops.h"
-#include "sandboxed_api/util/os_error.h"
 #include "sandboxed_api/util/path.h"
 #include "sandboxed_api/util/raw_logging.h"
 
@@ -278,7 +277,7 @@ absl::StatusOr<int> Communicate(const std::vector<std::string>& argv,
   posix_spawn_file_actions_t action;
 
   if (pipe(cout_pipe) == -1) {
-    return absl::UnknownError(sapi::OsErrorMessage(errno, "creating pipe"));
+    return absl::ErrnoToStatus(errno, "creating pipe");
   }
   file_util::fileops::FDCloser cout_closer{cout_pipe[1]};
 
@@ -301,7 +300,7 @@ absl::StatusOr<int> Communicate(const std::vector<std::string>& argv,
   if (posix_spawnp(&pid, args.array()[0], &action, nullptr,
                    const_cast<char**>(args.data()),
                    const_cast<char**>(envp.data())) != 0) {
-    return absl::UnknownError(sapi::OsErrorMessage(errno, "posix_spawnp()"));
+    return absl::ErrnoToStatus(errno, "posix_spawnp()");
   }
 
   // Close child end of the pipe.
@@ -312,8 +311,7 @@ absl::StatusOr<int> Communicate(const std::vector<std::string>& argv,
     int bytes_read =
         TEMP_FAILURE_RETRY(read(cout_pipe[0], &buffer[0], buffer.length()));
     if (bytes_read < 0) {
-      return absl::InternalError(
-          sapi::OsErrorMessage(errno, "reading from cout pipe"));
+      return absl::ErrnoToStatus(errno, "reading from cout pipe");
     }
     if (bytes_read == 0) {
       break;  // Nothing left to read
@@ -412,13 +410,12 @@ absl::StatusOr<std::string> ReadCPathFromPid(pid_t pid, uintptr_t ptr) {
 
   SAPI_RAW_VLOG(4, "ReadCPathFromPid (iovec): len1: %zu, len2: %zu", len1,
                 len2);
-  ssize_t sz = process_vm_readv(pid, local_iov, ABSL_ARRAYSIZE(local_iov),
-                                remote_iov, ABSL_ARRAYSIZE(remote_iov), 0);
-  if (sz < 0) {
-    return absl::InternalError(sapi::OsErrorMessage(
+  if (process_vm_readv(pid, local_iov, ABSL_ARRAYSIZE(local_iov), remote_iov,
+                       ABSL_ARRAYSIZE(remote_iov), 0) < 0) {
+    return absl::ErrnoToStatus(
         errno,
         absl::StrFormat("process_vm_readv() failed for PID: %d at address: %#x",
-                        pid, reinterpret_cast<uintptr_t>(ptr))));
+                        pid, reinterpret_cast<uintptr_t>(ptr)));
   }
 
   // Check for whether there's a NUL byte in the buffer. If not, it's an
diff --git a/sandboxed_api/sandbox2/util/minielf.cc b/sandboxed_api/sandbox2/util/minielf.cc
index 090e7a2..bb5f49d 100644
--- a/sandboxed_api/sandbox2/util/minielf.cc
+++ b/sandboxed_api/sandbox2/util/minielf.cc
@@ -27,7 +27,6 @@
 #include "absl/strings/str_cat.h"
 #include "sandboxed_api/config.h"
 #include "sandboxed_api/sandbox2/util.h"
-#include "sandboxed_api/util/os_error.h"
 #include "sandboxed_api/util/raw_logging.h"
 #include "sandboxed_api/util/status_macros.h"
 
@@ -62,8 +61,7 @@ namespace {
 // NOLINTNEXTLINE
 absl::Status CheckedFSeek(FILE* f, long offset, int whence) {
   if (fseek(f, offset, whence)) {
-    return absl::FailedPreconditionError(
-        sapi::OsErrorMessage(errno, "Fseek on ELF failed"));
+    return absl::ErrnoToStatus(errno, "Fseek on ELF failed");
   }
   return absl::OkStatus();
 }
@@ -72,8 +70,7 @@ absl::Status CheckedFRead(void* dst, size_t size, size_t nmemb, FILE* f) {
   if (std::fread(dst, size, nmemb, f) == nmemb) {
     return absl::OkStatus();
   }
-  return absl::FailedPreconditionError(
-      sapi::OsErrorMessage(errno, "Reading ELF data failed"));
+  return absl::ErrnoToStatus(errno, "Reading ELF data failed");
 }
 
 absl::Status CheckedRead(std::string* s, FILE* f) {
@@ -479,8 +476,8 @@ absl::StatusOr<ElfFile> ElfParser::Parse(const std::string& filename,
                                          uint32_t features) {
   ElfParser parser;
   if (parser.elf_ = std::fopen(filename.c_str(), "r"); !parser.elf_) {
-    return absl::UnknownError(sapi::OsErrorMessage(
-        errno, absl::StrCat("cannot open file: ", filename)));
+    return absl::ErrnoToStatus(errno,
+                               absl::StrCat("cannot open file: ", filename));
   }
 
   // Basic sanity check.
diff --git a/sandboxed_api/util/BUILD.bazel b/sandboxed_api/util/BUILD.bazel
index 8b73ef4..fe2e7f1 100644
--- a/sandboxed_api/util/BUILD.bazel
+++ b/sandboxed_api/util/BUILD.bazel
@@ -149,7 +149,6 @@ cc_library(
     name = "status",
     srcs = ["status.cc"],
     hdrs = [
-        "os_error.h",
         "status.h",
         "status_macros.h",
     ],
diff --git a/sandboxed_api/util/CMakeLists.txt b/sandboxed_api/util/CMakeLists.txt
index eacb5e4..96e6a92 100644
--- a/sandboxed_api/util/CMakeLists.txt
+++ b/sandboxed_api/util/CMakeLists.txt
@@ -105,7 +105,6 @@ target_link_libraries(sapi_util_status_proto
 
 # sandboxed_api/util:status
 add_library(sapi_util_status ${SAPI_LIB_TYPE}
-  os_error.h
   status.cc
   status.h
   status_macros.h
diff --git a/sandboxed_api/util/os_error.h b/sandboxed_api/util/os_error.h
deleted file mode 100644
index f8c3fbd..0000000
--- a/sandboxed_api/util/os_error.h
+++ /dev/null
@@ -1,35 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef SANDBOXED_API_UTIL_OS_ERROR_H_
-#define SANDBOXED_API_UTIL_OS_ERROR_H_
-
-#include <utility>
-
-#include "absl/strings/str_cat.h"
-#include "sandboxed_api/util/strerror.h"
-
-namespace sapi {
-
-// Returns a formatted message with the result of `StrError(error_number)`
-// appended.
-template <typename... Arg>
-std::string OsErrorMessage(int error_number, const Arg&... args) {
-  return absl::StrCat(std::forward<const Arg&>(args)..., ": ",
-                      ::sapi::StrError(error_number));
-}
-
-}  // namespace sapi
-
-#endif  // SANDBOXED_API_UTIL_OS_ERROR_H_
diff --git a/sandboxed_api/util/temp_file.cc b/sandboxed_api/util/temp_file.cc
index 12585c7..529f4dc 100644
--- a/sandboxed_api/util/temp_file.cc
+++ b/sandboxed_api/util/temp_file.cc
@@ -26,7 +26,6 @@
 #include "absl/status/statusor.h"
 #include "absl/strings/str_cat.h"
 #include "sandboxed_api/util/fileops.h"
-#include "sandboxed_api/util/os_error.h"
 #include "sandboxed_api/util/status_macros.h"
 
 namespace sapi {
@@ -40,7 +39,7 @@ absl::StatusOr<std::pair<std::string, int>> CreateNamedTempFile(
   std::string name_template = absl::StrCat(prefix, kMktempSuffix);
   int fd = mkstemp(&name_template[0]);
   if (fd < 0) {
-    return absl::UnknownError(sapi::OsErrorMessage(errno, "mkstemp()"));
+    return absl::ErrnoToStatus(errno, "mkstemp()");
   }
   return std::pair<std::string, int>{std::move(name_template), fd};
 }
@@ -55,7 +54,7 @@ absl::StatusOr<std::string> CreateNamedTempFileAndClose(
 absl::StatusOr<std::string> CreateTempDir(absl::string_view prefix) {
   std::string name_template = absl::StrCat(prefix, kMktempSuffix);
   if (mkdtemp(&name_template[0]) == nullptr) {
-    return absl::UnknownError(sapi::OsErrorMessage(errno, "mkdtemp()"));
+    return absl::ErrnoToStatus(errno, "mkdtemp()");
   }
   return name_template;
 }
diff --git a/sandboxed_api/util/temp_file_test.cc b/sandboxed_api/util/temp_file_test.cc
index 736080a..426e9bb 100644
--- a/sandboxed_api/util/temp_file_test.cc
+++ b/sandboxed_api/util/temp_file_test.cc
@@ -39,7 +39,7 @@ TEST(TempFileTest, CreateTempDirTest) {
   EXPECT_THAT(path, StartsWith(prefix));
   EXPECT_THAT(file_util::fileops::Exists(path, false), IsTrue());
   EXPECT_THAT(CreateTempDir("non_existing_dir/prefix"),
-              StatusIs(absl::StatusCode::kUnknown));
+              StatusIs(absl::StatusCode::kNotFound));
 }
 
 TEST(TempFileTest, MakeTempFileTest) {
@@ -54,7 +54,7 @@ TEST(TempFileTest, MakeTempFileTest) {
   EXPECT_THAT(fcntl(fd, F_GETFD), Ne(-1));
   EXPECT_THAT(close(fd), Eq(0));
   EXPECT_THAT(CreateNamedTempFile("non_existing_dir/prefix"),
-              StatusIs(absl::StatusCode::kUnknown));
+              StatusIs(absl::StatusCode::kNotFound));
 }
 
 }  // namespace