diff --git a/libcxx/include/print b/libcxx/include/print
--- a/libcxx/include/print
+++ b/libcxx/include/print
@@ -215,11 +215,15 @@
   if (__write_nl)
     __str.push_back('\n');
 
+  // On POSIX errno is set by fwrite. This is not required by the C standard.
+  errno         = 0;
   size_t __size = fwrite(__str.data(), 1, __str.size(), __stream);
   if (__size < __str.size()) {
+    if (errno)
+      std::__throw_system_error(errno, "failed to write formatted output");
     if (std::feof(__stream))
       std::__throw_system_error(EIO, "EOF while writing the formatted output");
-    std::__throw_system_error(std::ferror(__stream), "failed to write formatted output");
+    std::__throw_system_error(EIO, "failed to write formatted output");
   }
 }
 
diff --git a/libcxx/test/std/input.output/iostream.format/print.fun/print.file.pass.cpp b/libcxx/test/std/input.output/iostream.format/print.fun/print.file.pass.cpp
--- a/libcxx/test/std/input.output/iostream.format/print.fun/print.file.pass.cpp
+++ b/libcxx/test/std/input.output/iostream.format/print.fun/print.file.pass.cpp
@@ -75,7 +75,7 @@
   TEST_VALIDATE_EXCEPTION(
       std::system_error,
       [&]([[maybe_unused]] const std::system_error& e) {
-        [[maybe_unused]] std::string_view what{"failed to write formatted output"};
+        [[maybe_unused]] std::string_view what{"failed to write formatted output: Input/output error"};
         TEST_LIBCPP_REQUIRE(
             e.what() == what,
             TEST_WRITE_CONCATENATED("\nExpected exception ", what, "\nActual exception   ", e.what(), '\n'));
@@ -94,7 +94,7 @@
 #ifdef _AIX
         [[maybe_unused]] std::string_view what{"failed to write formatted output: Broken pipe"};
 #else
-        [[maybe_unused]] std::string_view what{"failed to write formatted output: Operation not permitted"};
+        [[maybe_unused]] std::string_view what{"failed to write formatted output: Bad file descriptor"};
 #endif
         TEST_LIBCPP_REQUIRE(
             e.what() == what,
diff --git a/libcxx/test/std/input.output/iostream.format/print.fun/println.file.pass.cpp b/libcxx/test/std/input.output/iostream.format/print.fun/println.file.pass.cpp
--- a/libcxx/test/std/input.output/iostream.format/print.fun/println.file.pass.cpp
+++ b/libcxx/test/std/input.output/iostream.format/print.fun/println.file.pass.cpp
@@ -78,7 +78,7 @@
   TEST_VALIDATE_EXCEPTION(
       std::system_error,
       [&]([[maybe_unused]] const std::system_error& e) {
-        [[maybe_unused]] std::string_view what{"failed to write formatted output"};
+        [[maybe_unused]] std::string_view what{"failed to write formatted output: Input/output error"};
         TEST_LIBCPP_REQUIRE(
             e.what() == what,
             TEST_WRITE_CONCATENATED("\nExpected exception ", what, "\nActual exception   ", e.what(), '\n'));
@@ -97,7 +97,7 @@
 #ifdef _AIX
         [[maybe_unused]] std::string_view what{"failed to write formatted output: Broken pipe"};
 #else
-        [[maybe_unused]] std::string_view what{"failed to write formatted output: Operation not permitted"};
+        [[maybe_unused]] std::string_view what{"failed to write formatted output: Bad file descriptor"};
 #endif
         TEST_LIBCPP_REQUIRE(
             e.what() == what,
diff --git a/libcxx/test/std/input.output/iostream.format/print.fun/vprint_nonunicode.file.pass.cpp b/libcxx/test/std/input.output/iostream.format/print.fun/vprint_nonunicode.file.pass.cpp
--- a/libcxx/test/std/input.output/iostream.format/print.fun/vprint_nonunicode.file.pass.cpp
+++ b/libcxx/test/std/input.output/iostream.format/print.fun/vprint_nonunicode.file.pass.cpp
@@ -84,7 +84,7 @@
   TEST_VALIDATE_EXCEPTION(
       std::system_error,
       [&]([[maybe_unused]] const std::system_error& e) {
-        [[maybe_unused]] std::string_view what{"failed to write formatted output"};
+        [[maybe_unused]] std::string_view what{"failed to write formatted output: Input/output error"};
         TEST_LIBCPP_REQUIRE(
             e.what() == what,
             TEST_WRITE_CONCATENATED("\nExpected exception ", what, "\nActual exception   ", e.what(), '\n'));
@@ -103,7 +103,7 @@
 #ifdef _AIX
         [[maybe_unused]] std::string_view what{"failed to write formatted output: Broken pipe"};
 #else
-        [[maybe_unused]] std::string_view what{"failed to write formatted output: Operation not permitted"};
+        [[maybe_unused]] std::string_view what{"failed to write formatted output: Bad file descriptor"};
 #endif
         TEST_LIBCPP_REQUIRE(
             e.what() == what,
diff --git a/libcxx/test/std/input.output/iostream.format/print.fun/vprint_unicode.file.pass.cpp b/libcxx/test/std/input.output/iostream.format/print.fun/vprint_unicode.file.pass.cpp
--- a/libcxx/test/std/input.output/iostream.format/print.fun/vprint_unicode.file.pass.cpp
+++ b/libcxx/test/std/input.output/iostream.format/print.fun/vprint_unicode.file.pass.cpp
@@ -91,7 +91,7 @@
   TEST_VALIDATE_EXCEPTION(
       std::system_error,
       [&]([[maybe_unused]] const std::system_error& e) {
-        [[maybe_unused]] std::string_view what{"failed to write formatted output"};
+        [[maybe_unused]] std::string_view what{"failed to write formatted output: Input/output error"};
         TEST_LIBCPP_REQUIRE(
             e.what() == what,
             TEST_WRITE_CONCATENATED("\nExpected exception ", what, "\nActual exception   ", e.what(), '\n'));
@@ -110,7 +110,7 @@
 #ifdef _AIX
         [[maybe_unused]] std::string_view what{"failed to write formatted output: Broken pipe"};
 #else
-        [[maybe_unused]] std::string_view what{"failed to write formatted output: Operation not permitted"};
+        [[maybe_unused]] std::string_view what{"failed to write formatted output: Bad file descriptor"};
 #endif
         TEST_LIBCPP_REQUIRE(
             e.what() == what,