feat: add F command

src/sed/command.rs

@@ -42,6 +42,9 @@ pub struct ProcessingContext {
     // Other context
     /// Currently processed input file name (not script) in quoted form
     pub input_name: String,
+    /// Currently processed input file name as supplied, for commands that
+    /// print it directly.
+    pub raw_input_name: String,
     /// Current input line number
     pub line_number: usize,
     /// True if this is the last address of a range

src/sed/compiler.rs

@@ -1327,6 +1327,10 @@ fn get_cmd_spec(
             n_addr: 2,
             handler: compile_empty_command,
         }),
+        'F' if !posix => Ok(CommandSpec {
+            n_addr: 2,
+            handler: compile_empty_command,
+        }),
         'l' => Ok(CommandSpec {
             n_addr: 2,
             handler: compile_number_command,

src/sed/mod.rs

@@ -204,6 +204,7 @@ fn build_context(matches: &ArgMatches) -> ProcessingContext {
 
         // Other context
         input_name: "<stdin>".to_string(),
+        raw_input_name: "-".to_string(),
         line_number: 0,
         last_address: false,
         last_line: false,

src/sed/processor.rs

@@ -508,6 +508,10 @@ fn process_file(
                     pattern.clear();
                     break;
                 }
+                'F' => {
+                    let separator = if context.null_data { '\0' } else { '\n' };
+                    output.write_str(format!("{}{}", context.raw_input_name, separator))?;
+                }
                 'g' => {
                     // Replace pattern with the contents of the hold space.
                     pattern.set_to_string(context.hold.content.clone(), context.hold.has_newline);
@@ -705,6 +709,7 @@ pub fn process_all_files(
         }
 
         context.input_name = path.quote().to_string();
+        context.raw_input_name = path.to_string_lossy().to_string();
         process_file(commands.clone(), &mut reader, output, context)?;
 
         // Handle any N command remains.

tests/by-util/test_sed.rs

@@ -388,6 +388,41 @@ check_output!(pattern_next_output, ["-e", r"4n", LINES1]);
 check_output!(pattern_next_no_output, ["-n", "-e", r"4n", LINES1]);
 check_output!(pattern_next_print_output, ["-e", r"4n;p", LINES1]);
 check_output!(pattern_next_print_no_output, ["-n", "-e", r"4n;p", LINES1]);
+
+#[test]
+fn pattern_print_filename_with_f_command() {
+    new_ucmd!()
+        .args(&["-n", "F", LINES1])
+        .succeeds()
+        .stdout_is("input/lines1\n".repeat(14));
+}
+
+#[test]
+fn pattern_print_filename_with_f_command_stdin() {
+    new_ucmd!()
+        .args(&["-n", "F"])
+        .pipe_in("a\nb\n")
+        .succeeds()
+        .stdout_is("-\n-\n");
+}
+
+#[test]
+fn pattern_print_filename_with_f_command_null_data() {
+    new_ucmd!()
+        .args(&["-z", "-n", "F"])
+        .pipe_in("a\0b\0")
+        .succeeds()
+        .stdout_is("-\0");
+}
+
+#[test]
+fn pattern_print_filename_with_f_command_is_non_posix() {
+    new_ucmd!()
+        .args(&["--posix", "F"])
+        .fails()
+        .code_is(1)
+        .stderr_is("sed: <script argument 1>:1:1: error: invalid command code `F'\n");
+}
 check_output!(pattern_quit, [r"5q", LINES1]);
 check_output!(pattern_quit_2, [r"5q", LINES1, LINES2]);
 check_output!(pattern_re_reuse, ["-n", r"/_1/p;//p", LINES1]);