From f5da131c422d1705d596942efd606bf86a187506 Mon Sep 17 00:00:00 2001
From: Bhuminjay <bhuminjaysoni@gmail.com>
Date: Fri, 30 Jan 2026 18:20:14 +0530
Subject: [PATCH 1/9] add info for non_octal permissions

Signed-off-by: Bhuminjay <bhuminjaysoni@gmail.com>
---
 .../rules/ruff/rules/non_octal_permissions.rs | 35 ++++++++++++++++-
 ..._rules__ruff__tests__RUF064_RUF064.py.snap | 38 +++++++++++++++++++
 2 files changed, 72 insertions(+), 1 deletion(-)

diff --git a/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs b/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs
index 461972614be09..3bc42c52a192b 100644
--- a/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs
+++ b/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs
@@ -88,6 +88,23 @@ impl Violation for NonOctalPermissions {
     }
 }
 
+fn get_permissions(mode: u16) -> String {
+    let perm = mode & 0o777;
+    let mut out = String::with_capacity(9);
+    let append_permission = |out: &mut String, bits: u16| {
+        out.push(if bits & 0o4 != 0 { 'r' } else { '-' });
+        out.push(if bits & 0o2 != 0 { 'w' } else { '-' });
+        out.push(if bits & 0o1 != 0 { 'x' } else { '-' });
+    };
+    out.push_str("u=");
+    append_permission(&mut out, (perm >> 6) & 0o7);
+    out.push_str(", g=");
+    append_permission(&mut out, (perm >> 3) & 0o7);
+    out.push_str(", o=");
+    append_permission(&mut out, perm & 0o7);
+    out
+}
+
 /// RUF064
 pub(crate) fn non_octal_permissions(checker: &Checker, call: &ExprCall) {
     let mode_arg = find_func_mode_arg(call, checker.semantic())
@@ -111,8 +128,21 @@ pub(crate) fn non_octal_permissions(checker: &Checker, call: &ExprCall) {
         return;
     }
 
+    let mode = match int.as_u16() {
+        Some(m) => m,
+        None => {
+            checker.report_diagnostic(NonOctalPermissions, mode_arg.range());
+            return;
+        }
+    };
+
     let mut diagnostic = checker.report_diagnostic(NonOctalPermissions, mode_arg.range());
 
+    diagnostic.info(format!(
+        "current value {mode_literal} will be interpreted as 0o{:o}, permissions: {}",
+        mode & 0o777,
+        get_permissions(mode)
+    ));
     // Don't suggest a fix for 0x or 0b literals.
     if mode_literal.starts_with("0x") || mode_literal.starts_with("0b") {
         return;
@@ -128,7 +158,10 @@ pub(crate) fn non_octal_permissions(checker: &Checker, call: &ExprCall) {
     let Some(suggested) = int.as_u16().and_then(suggest_fix) else {
         return;
     };
-
+    let suggested_permissions = get_permissions(suggested);
+    diagnostic.info(format!(
+        "suggested value: 0o{suggested:o}, permissions: {suggested_permissions}"
+    ));
     let edit = Edit::range_replacement(format!("{suggested:#o}"), mode_arg.range());
     diagnostic.set_fix(Fix::unsafe_edit(edit));
 }
diff --git a/crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__RUF064_RUF064.py.snap b/crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__RUF064_RUF064.py.snap
index 9a88ad5557cc9..b198ecfc4b9f5 100644
--- a/crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__RUF064_RUF064.py.snap
+++ b/crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__RUF064_RUF064.py.snap
@@ -12,6 +12,8 @@ RUF064 [*] Non-octal mode
 8 | os.chmod("foo", 7777)  # Error
   |
 help: Replace with octal literal
+info: current value 444 will be interpreted as 0o674, permissions: u=rw-, g=rwx, o=r--
+info: suggested value: 0o444, permissions: u=r--, g=r--, o=r--
 3 | import os
 4 | from pathlib import Path
 5 | 
@@ -33,6 +35,7 @@ RUF064 Non-octal mode
 10 | os.chmod("foo", 99999)  # Error
    |
 help: Replace with octal literal
+info: current value 7777 will be interpreted as 0o141, permissions: u=--x, g=r--, o=--x
 
 RUF064 Non-octal mode
   --> RUF064.py:9:17
@@ -44,6 +47,7 @@ RUF064 Non-octal mode
 10 | os.chmod("foo", 99999)  # Error
    |
 help: Replace with octal literal
+info: current value 10000 will be interpreted as 0o420, permissions: u=r--, g=-w-, o=---
 
 RUF064 Non-octal mode
   --> RUF064.py:10:17
@@ -67,6 +71,8 @@ RUF064 [*] Non-octal mode
 13 | os.umask(0o777)  # OK
    |
 help: Replace with octal literal
+info: current value 777 will be interpreted as 0o411, permissions: u=r--, g=--x, o=--x
+info: suggested value: 0o777, permissions: u=rwx, g=rwx, o=rwx
 9  | os.chmod("foo", 10000)  # Error
 10 | os.chmod("foo", 99999)  # Error
 11 | 
@@ -87,6 +93,8 @@ RUF064 [*] Non-octal mode
 16 | os.fchmod(0, 0o400)  # OK
    |
 help: Replace with octal literal
+info: current value 400 will be interpreted as 0o620, permissions: u=rw-, g=-w-, o=---
+info: suggested value: 0o400, permissions: u=r--, g=---, o=---
 12 | os.umask(777)  # Error
 13 | os.umask(0o777)  # OK
 14 | 
@@ -107,6 +115,8 @@ RUF064 [*] Non-octal mode
 19 | os.lchmod("foo", 0o755)  # OK
    |
 help: Replace with octal literal
+info: current value 755 will be interpreted as 0o363, permissions: u=-wx, g=rw-, o=-wx
+info: suggested value: 0o755, permissions: u=rwx, g=r-x, o=r-x
 15 | os.fchmod(0, 400)  # Error
 16 | os.fchmod(0, 0o400)  # OK
 17 | 
@@ -127,6 +137,8 @@ RUF064 [*] Non-octal mode
 22 | os.mkdir("foo", 0o600)  # OK
    |
 help: Replace with octal literal
+info: current value 600 will be interpreted as 0o130, permissions: u=--x, g=-wx, o=---
+info: suggested value: 0o600, permissions: u=rw-, g=---, o=---
 18 | os.lchmod("foo", 755)  # Error
 19 | os.lchmod("foo", 0o755)  # OK
 20 | 
@@ -147,6 +159,8 @@ RUF064 [*] Non-octal mode
 25 | os.makedirs("foo", 0o644)  # OK
    |
 help: Replace with octal literal
+info: current value 644 will be interpreted as 0o204, permissions: u=-w-, g=---, o=r--
+info: suggested value: 0o644, permissions: u=rw-, g=r--, o=r--
 21 | os.mkdir("foo", 600)  # Error
 22 | os.mkdir("foo", 0o600)  # OK
 23 | 
@@ -167,6 +181,8 @@ RUF064 [*] Non-octal mode
 28 | os.mkfifo("foo", 0o640)  # OK
    |
 help: Replace with octal literal
+info: current value 640 will be interpreted as 0o200, permissions: u=-w-, g=---, o=---
+info: suggested value: 0o640, permissions: u=rw-, g=r--, o=---
 24 | os.makedirs("foo", 644)  # Error
 25 | os.makedirs("foo", 0o644)  # OK
 26 | 
@@ -187,6 +203,8 @@ RUF064 [*] Non-octal mode
 31 | os.mknod("foo", 0o660)  # OK
    |
 help: Replace with octal literal
+info: current value 660 will be interpreted as 0o224, permissions: u=-w-, g=-w-, o=r--
+info: suggested value: 0o660, permissions: u=rw-, g=rw-, o=---
 27 | os.mkfifo("foo", 640)  # Error
 28 | os.mkfifo("foo", 0o640)  # OK
 29 | 
@@ -207,6 +225,8 @@ RUF064 [*] Non-octal mode
 34 | os.open("foo", os.O_CREAT, 0o644)  # OK
    |
 help: Replace with octal literal
+info: current value 644 will be interpreted as 0o204, permissions: u=-w-, g=---, o=r--
+info: suggested value: 0o644, permissions: u=rw-, g=r--, o=r--
 30 | os.mknod("foo", 660)  # Error
 31 | os.mknod("foo", 0o660)  # OK
 32 | 
@@ -227,6 +247,8 @@ RUF064 [*] Non-octal mode
 37 | Path("bar").chmod(0o755)  # OK
    |
 help: Replace with octal literal
+info: current value 755 will be interpreted as 0o363, permissions: u=-wx, g=rw-, o=-wx
+info: suggested value: 0o755, permissions: u=rwx, g=r-x, o=r-x
 33 | os.open("foo", os.O_CREAT, 644)  # Error
 34 | os.open("foo", os.O_CREAT, 0o644)  # OK
 35 | 
@@ -246,6 +268,8 @@ RUF064 [*] Non-octal mode
 41 | path.chmod(0o755)  # OK
    |
 help: Replace with octal literal
+info: current value 755 will be interpreted as 0o363, permissions: u=-wx, g=rw-, o=-wx
+info: suggested value: 0o755, permissions: u=rwx, g=r-x, o=r-x
 37 | Path("bar").chmod(0o755)  # OK
 38 | 
 39 | path = Path("bar")
@@ -266,6 +290,8 @@ RUF064 [*] Non-octal mode
 44 | dbm.open("db", "r", 0o600)  # OK
    |
 help: Replace with octal literal
+info: current value 600 will be interpreted as 0o130, permissions: u=--x, g=-wx, o=---
+info: suggested value: 0o600, permissions: u=rw-, g=---, o=---
 40 | path.chmod(755)  # Error
 41 | path.chmod(0o755)  # OK
 42 | 
@@ -286,6 +312,8 @@ RUF064 [*] Non-octal mode
 47 | dbm.gnu.open("db", "r", 0o600)  # OK
    |
 help: Replace with octal literal
+info: current value 600 will be interpreted as 0o130, permissions: u=--x, g=-wx, o=---
+info: suggested value: 0o600, permissions: u=rw-, g=---, o=---
 43 | dbm.open("db", "r", 600)  # Error
 44 | dbm.open("db", "r", 0o600)  # OK
 45 | 
@@ -306,6 +334,8 @@ RUF064 [*] Non-octal mode
 50 | dbm.ndbm.open("db", "r", 0o600)  # OK
    |
 help: Replace with octal literal
+info: current value 600 will be interpreted as 0o130, permissions: u=--x, g=-wx, o=---
+info: suggested value: 0o600, permissions: u=rw-, g=---, o=---
 46 | dbm.gnu.open("db", "r", 600)  # Error
 47 | dbm.gnu.open("db", "r", 0o600)  # OK
 48 | 
@@ -326,6 +356,8 @@ RUF064 [*] Non-octal mode
 53 | os.fchmod(0, 493)  # 0o755
    |
 help: Replace with octal literal
+info: current value 256 will be interpreted as 0o400, permissions: u=r--, g=---, o=---
+info: suggested value: 0o400, permissions: u=r--, g=---, o=---
 49 | dbm.ndbm.open("db", "r", 600)  # Error
 50 | dbm.ndbm.open("db", "r", 0o600)  # OK
 51 | 
@@ -346,6 +378,8 @@ RUF064 [*] Non-octal mode
 55 | # https://github.com/astral-sh/ruff/issues/19010
    |
 help: Replace with octal literal
+info: current value 493 will be interpreted as 0o755, permissions: u=rwx, g=r-x, o=r-x
+info: suggested value: 0o755, permissions: u=rwx, g=r-x, o=r-x
 50 | dbm.ndbm.open("db", "r", 0o600)  # OK
 51 | 
 52 | os.fchmod(0, 256)  # 0o400
@@ -365,6 +399,7 @@ RUF064 [*] Non-octal mode
 57 | os.chmod("foo", 0000)  # Error
    |
 help: Replace with octal literal
+info: current value 000 will be interpreted as 0o0, permissions: u=---, g=---, o=---
 53 | os.fchmod(0, 493)  # 0o755
 54 | 
 55 | # https://github.com/astral-sh/ruff/issues/19010
@@ -385,6 +420,7 @@ RUF064 [*] Non-octal mode
 59 | os.chmod("foo", 0b0)  # Error
    |
 help: Replace with octal literal
+info: current value 0000 will be interpreted as 0o0, permissions: u=---, g=---, o=---
 54 | 
 55 | # https://github.com/astral-sh/ruff/issues/19010
 56 | os.chmod("foo", 000)  # Error
@@ -405,6 +441,7 @@ RUF064 Non-octal mode
 61 | os.chmod("foo", 0)  # Ok
    |
 help: Replace with octal literal
+info: current value 0b0 will be interpreted as 0o0, permissions: u=---, g=---, o=---
 
 RUF064 Non-octal mode
   --> RUF064.py:60:17
@@ -415,3 +452,4 @@ RUF064 Non-octal mode
 61 | os.chmod("foo", 0)  # Ok
    |
 help: Replace with octal literal
+info: current value 0x0 will be interpreted as 0o0, permissions: u=---, g=---, o=---

From ca0e6252903de228ea06f5b6a54e1d3567b0ee72 Mon Sep 17 00:00:00 2001
From: Bhuminjay <bhuminjaysoni@gmail.com>
Date: Fri, 30 Jan 2026 18:26:30 +0530
Subject: [PATCH 2/9] clippy fix

Signed-off-by: Bhuminjay <bhuminjaysoni@gmail.com>
---
 .../src/rules/ruff/rules/non_octal_permissions.rs        | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs b/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs
index 3bc42c52a192b..b7ff229fcca07 100644
--- a/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs
+++ b/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs
@@ -128,12 +128,9 @@ pub(crate) fn non_octal_permissions(checker: &Checker, call: &ExprCall) {
         return;
     }
 
-    let mode = match int.as_u16() {
-        Some(m) => m,
-        None => {
-            checker.report_diagnostic(NonOctalPermissions, mode_arg.range());
-            return;
-        }
+    let Some(mode) = int.as_u16() else {
+        checker.report_diagnostic(NonOctalPermissions, mode_arg.range());
+        return;
     };
 
     let mut diagnostic = checker.report_diagnostic(NonOctalPermissions, mode_arg.range());

From 95a85338036fab8b4be4fa7607cd15282ca72d5a Mon Sep 17 00:00:00 2001
From: Bhuminjay <bhuminjaysoni@gmail.com>
Date: Sat, 31 Jan 2026 17:40:19 +0530
Subject: [PATCH 3/9] message nit

Signed-off-by: Bhuminjay <bhuminjaysoni@gmail.com>
---
 .../rules/ruff/rules/non_octal_permissions.rs | 40 +++++-----
 ..._rules__ruff__tests__RUF064_RUF064.py.snap | 76 +++++++++----------
 2 files changed, 58 insertions(+), 58 deletions(-)

diff --git a/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs b/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs
index b7ff229fcca07..93fbe47d41e10 100644
--- a/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs
+++ b/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs
@@ -88,23 +88,6 @@ impl Violation for NonOctalPermissions {
     }
 }
 
-fn get_permissions(mode: u16) -> String {
-    let perm = mode & 0o777;
-    let mut out = String::with_capacity(9);
-    let append_permission = |out: &mut String, bits: u16| {
-        out.push(if bits & 0o4 != 0 { 'r' } else { '-' });
-        out.push(if bits & 0o2 != 0 { 'w' } else { '-' });
-        out.push(if bits & 0o1 != 0 { 'x' } else { '-' });
-    };
-    out.push_str("u=");
-    append_permission(&mut out, (perm >> 6) & 0o7);
-    out.push_str(", g=");
-    append_permission(&mut out, (perm >> 3) & 0o7);
-    out.push_str(", o=");
-    append_permission(&mut out, perm & 0o7);
-    out
-}
-
 /// RUF064
 pub(crate) fn non_octal_permissions(checker: &Checker, call: &ExprCall) {
     let mode_arg = find_func_mode_arg(call, checker.semantic())
@@ -136,8 +119,8 @@ pub(crate) fn non_octal_permissions(checker: &Checker, call: &ExprCall) {
     let mut diagnostic = checker.report_diagnostic(NonOctalPermissions, mode_arg.range());
 
     diagnostic.info(format!(
-        "current value {mode_literal} will be interpreted as 0o{:o}, permissions: {}",
-        mode & 0o777,
+        "Current value of mode {mode_literal} ({:#o}) sets permissions: {})",
+        mode & 0o7777,
         get_permissions(mode)
     ));
     // Don't suggest a fix for 0x or 0b literals.
@@ -157,7 +140,7 @@ pub(crate) fn non_octal_permissions(checker: &Checker, call: &ExprCall) {
     };
     let suggested_permissions = get_permissions(suggested);
     diagnostic.info(format!(
-        "suggested value: 0o{suggested:o}, permissions: {suggested_permissions}"
+        "Suggested value of {suggested:#0} sets permissions: {suggested_permissions}"
     ));
     let edit = Edit::range_replacement(format!("{suggested:#o}"), mode_arg.range());
     diagnostic.set_fix(Fix::unsafe_edit(edit));
@@ -260,3 +243,20 @@ fn suggest_fix(mode: u16) -> Option<u16> {
         _ => None,
     }
 }
+
+fn get_permissions(mode: u16) -> String {
+    let perm = mode & 0o777;
+    let mut out = String::with_capacity(9);
+    let append_permission = |out: &mut String, bits: u16| {
+        out.push(if bits & 0o4 != 0 { 'r' } else { '-' });
+        out.push(if bits & 0o2 != 0 { 'w' } else { '-' });
+        out.push(if bits & 0o1 != 0 { 'x' } else { '-' });
+    };
+    out.push_str("u=");
+    append_permission(&mut out, (perm >> 6) & 0o7);
+    out.push_str(", g=");
+    append_permission(&mut out, (perm >> 3) & 0o7);
+    out.push_str(", o=");
+    append_permission(&mut out, perm & 0o7);
+    out
+}
diff --git a/crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__RUF064_RUF064.py.snap b/crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__RUF064_RUF064.py.snap
index b198ecfc4b9f5..2a9f96f5c58e4 100644
--- a/crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__RUF064_RUF064.py.snap
+++ b/crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__RUF064_RUF064.py.snap
@@ -12,8 +12,8 @@ RUF064 [*] Non-octal mode
 8 | os.chmod("foo", 7777)  # Error
   |
 help: Replace with octal literal
-info: current value 444 will be interpreted as 0o674, permissions: u=rw-, g=rwx, o=r--
-info: suggested value: 0o444, permissions: u=r--, g=r--, o=r--
+info: Current value of mode 444 (0o674) sets permissions: u=rw-, g=rwx, o=r--)
+info: Suggested value of 292 sets permissions: u=r--, g=r--, o=r--
 3 | import os
 4 | from pathlib import Path
 5 | 
@@ -35,7 +35,7 @@ RUF064 Non-octal mode
 10 | os.chmod("foo", 99999)  # Error
    |
 help: Replace with octal literal
-info: current value 7777 will be interpreted as 0o141, permissions: u=--x, g=r--, o=--x
+info: Current value of mode 7777 (0o7141) sets permissions: u=--x, g=r--, o=--x)
 
 RUF064 Non-octal mode
   --> RUF064.py:9:17
@@ -47,7 +47,7 @@ RUF064 Non-octal mode
 10 | os.chmod("foo", 99999)  # Error
    |
 help: Replace with octal literal
-info: current value 10000 will be interpreted as 0o420, permissions: u=r--, g=-w-, o=---
+info: Current value of mode 10000 (0o3420) sets permissions: u=r--, g=-w-, o=---)
 
 RUF064 Non-octal mode
   --> RUF064.py:10:17
@@ -71,8 +71,8 @@ RUF064 [*] Non-octal mode
 13 | os.umask(0o777)  # OK
    |
 help: Replace with octal literal
-info: current value 777 will be interpreted as 0o411, permissions: u=r--, g=--x, o=--x
-info: suggested value: 0o777, permissions: u=rwx, g=rwx, o=rwx
+info: Current value of mode 777 (0o1411) sets permissions: u=r--, g=--x, o=--x)
+info: Suggested value of 511 sets permissions: u=rwx, g=rwx, o=rwx
 9  | os.chmod("foo", 10000)  # Error
 10 | os.chmod("foo", 99999)  # Error
 11 | 
@@ -93,8 +93,8 @@ RUF064 [*] Non-octal mode
 16 | os.fchmod(0, 0o400)  # OK
    |
 help: Replace with octal literal
-info: current value 400 will be interpreted as 0o620, permissions: u=rw-, g=-w-, o=---
-info: suggested value: 0o400, permissions: u=r--, g=---, o=---
+info: Current value of mode 400 (0o620) sets permissions: u=rw-, g=-w-, o=---)
+info: Suggested value of 256 sets permissions: u=r--, g=---, o=---
 12 | os.umask(777)  # Error
 13 | os.umask(0o777)  # OK
 14 | 
@@ -115,8 +115,8 @@ RUF064 [*] Non-octal mode
 19 | os.lchmod("foo", 0o755)  # OK
    |
 help: Replace with octal literal
-info: current value 755 will be interpreted as 0o363, permissions: u=-wx, g=rw-, o=-wx
-info: suggested value: 0o755, permissions: u=rwx, g=r-x, o=r-x
+info: Current value of mode 755 (0o1363) sets permissions: u=-wx, g=rw-, o=-wx)
+info: Suggested value of 493 sets permissions: u=rwx, g=r-x, o=r-x
 15 | os.fchmod(0, 400)  # Error
 16 | os.fchmod(0, 0o400)  # OK
 17 | 
@@ -137,8 +137,8 @@ RUF064 [*] Non-octal mode
 22 | os.mkdir("foo", 0o600)  # OK
    |
 help: Replace with octal literal
-info: current value 600 will be interpreted as 0o130, permissions: u=--x, g=-wx, o=---
-info: suggested value: 0o600, permissions: u=rw-, g=---, o=---
+info: Current value of mode 600 (0o1130) sets permissions: u=--x, g=-wx, o=---)
+info: Suggested value of 384 sets permissions: u=rw-, g=---, o=---
 18 | os.lchmod("foo", 755)  # Error
 19 | os.lchmod("foo", 0o755)  # OK
 20 | 
@@ -159,8 +159,8 @@ RUF064 [*] Non-octal mode
 25 | os.makedirs("foo", 0o644)  # OK
    |
 help: Replace with octal literal
-info: current value 644 will be interpreted as 0o204, permissions: u=-w-, g=---, o=r--
-info: suggested value: 0o644, permissions: u=rw-, g=r--, o=r--
+info: Current value of mode 644 (0o1204) sets permissions: u=-w-, g=---, o=r--)
+info: Suggested value of 420 sets permissions: u=rw-, g=r--, o=r--
 21 | os.mkdir("foo", 600)  # Error
 22 | os.mkdir("foo", 0o600)  # OK
 23 | 
@@ -181,8 +181,8 @@ RUF064 [*] Non-octal mode
 28 | os.mkfifo("foo", 0o640)  # OK
    |
 help: Replace with octal literal
-info: current value 640 will be interpreted as 0o200, permissions: u=-w-, g=---, o=---
-info: suggested value: 0o640, permissions: u=rw-, g=r--, o=---
+info: Current value of mode 640 (0o1200) sets permissions: u=-w-, g=---, o=---)
+info: Suggested value of 416 sets permissions: u=rw-, g=r--, o=---
 24 | os.makedirs("foo", 644)  # Error
 25 | os.makedirs("foo", 0o644)  # OK
 26 | 
@@ -203,8 +203,8 @@ RUF064 [*] Non-octal mode
 31 | os.mknod("foo", 0o660)  # OK
    |
 help: Replace with octal literal
-info: current value 660 will be interpreted as 0o224, permissions: u=-w-, g=-w-, o=r--
-info: suggested value: 0o660, permissions: u=rw-, g=rw-, o=---
+info: Current value of mode 660 (0o1224) sets permissions: u=-w-, g=-w-, o=r--)
+info: Suggested value of 432 sets permissions: u=rw-, g=rw-, o=---
 27 | os.mkfifo("foo", 640)  # Error
 28 | os.mkfifo("foo", 0o640)  # OK
 29 | 
@@ -225,8 +225,8 @@ RUF064 [*] Non-octal mode
 34 | os.open("foo", os.O_CREAT, 0o644)  # OK
    |
 help: Replace with octal literal
-info: current value 644 will be interpreted as 0o204, permissions: u=-w-, g=---, o=r--
-info: suggested value: 0o644, permissions: u=rw-, g=r--, o=r--
+info: Current value of mode 644 (0o1204) sets permissions: u=-w-, g=---, o=r--)
+info: Suggested value of 420 sets permissions: u=rw-, g=r--, o=r--
 30 | os.mknod("foo", 660)  # Error
 31 | os.mknod("foo", 0o660)  # OK
 32 | 
@@ -247,8 +247,8 @@ RUF064 [*] Non-octal mode
 37 | Path("bar").chmod(0o755)  # OK
    |
 help: Replace with octal literal
-info: current value 755 will be interpreted as 0o363, permissions: u=-wx, g=rw-, o=-wx
-info: suggested value: 0o755, permissions: u=rwx, g=r-x, o=r-x
+info: Current value of mode 755 (0o1363) sets permissions: u=-wx, g=rw-, o=-wx)
+info: Suggested value of 493 sets permissions: u=rwx, g=r-x, o=r-x
 33 | os.open("foo", os.O_CREAT, 644)  # Error
 34 | os.open("foo", os.O_CREAT, 0o644)  # OK
 35 | 
@@ -268,8 +268,8 @@ RUF064 [*] Non-octal mode
 41 | path.chmod(0o755)  # OK
    |
 help: Replace with octal literal
-info: current value 755 will be interpreted as 0o363, permissions: u=-wx, g=rw-, o=-wx
-info: suggested value: 0o755, permissions: u=rwx, g=r-x, o=r-x
+info: Current value of mode 755 (0o1363) sets permissions: u=-wx, g=rw-, o=-wx)
+info: Suggested value of 493 sets permissions: u=rwx, g=r-x, o=r-x
 37 | Path("bar").chmod(0o755)  # OK
 38 | 
 39 | path = Path("bar")
@@ -290,8 +290,8 @@ RUF064 [*] Non-octal mode
 44 | dbm.open("db", "r", 0o600)  # OK
    |
 help: Replace with octal literal
-info: current value 600 will be interpreted as 0o130, permissions: u=--x, g=-wx, o=---
-info: suggested value: 0o600, permissions: u=rw-, g=---, o=---
+info: Current value of mode 600 (0o1130) sets permissions: u=--x, g=-wx, o=---)
+info: Suggested value of 384 sets permissions: u=rw-, g=---, o=---
 40 | path.chmod(755)  # Error
 41 | path.chmod(0o755)  # OK
 42 | 
@@ -312,8 +312,8 @@ RUF064 [*] Non-octal mode
 47 | dbm.gnu.open("db", "r", 0o600)  # OK
    |
 help: Replace with octal literal
-info: current value 600 will be interpreted as 0o130, permissions: u=--x, g=-wx, o=---
-info: suggested value: 0o600, permissions: u=rw-, g=---, o=---
+info: Current value of mode 600 (0o1130) sets permissions: u=--x, g=-wx, o=---)
+info: Suggested value of 384 sets permissions: u=rw-, g=---, o=---
 43 | dbm.open("db", "r", 600)  # Error
 44 | dbm.open("db", "r", 0o600)  # OK
 45 | 
@@ -334,8 +334,8 @@ RUF064 [*] Non-octal mode
 50 | dbm.ndbm.open("db", "r", 0o600)  # OK
    |
 help: Replace with octal literal
-info: current value 600 will be interpreted as 0o130, permissions: u=--x, g=-wx, o=---
-info: suggested value: 0o600, permissions: u=rw-, g=---, o=---
+info: Current value of mode 600 (0o1130) sets permissions: u=--x, g=-wx, o=---)
+info: Suggested value of 384 sets permissions: u=rw-, g=---, o=---
 46 | dbm.gnu.open("db", "r", 600)  # Error
 47 | dbm.gnu.open("db", "r", 0o600)  # OK
 48 | 
@@ -356,8 +356,8 @@ RUF064 [*] Non-octal mode
 53 | os.fchmod(0, 493)  # 0o755
    |
 help: Replace with octal literal
-info: current value 256 will be interpreted as 0o400, permissions: u=r--, g=---, o=---
-info: suggested value: 0o400, permissions: u=r--, g=---, o=---
+info: Current value of mode 256 (0o400) sets permissions: u=r--, g=---, o=---)
+info: Suggested value of 256 sets permissions: u=r--, g=---, o=---
 49 | dbm.ndbm.open("db", "r", 600)  # Error
 50 | dbm.ndbm.open("db", "r", 0o600)  # OK
 51 | 
@@ -378,8 +378,8 @@ RUF064 [*] Non-octal mode
 55 | # https://github.com/astral-sh/ruff/issues/19010
    |
 help: Replace with octal literal
-info: current value 493 will be interpreted as 0o755, permissions: u=rwx, g=r-x, o=r-x
-info: suggested value: 0o755, permissions: u=rwx, g=r-x, o=r-x
+info: Current value of mode 493 (0o755) sets permissions: u=rwx, g=r-x, o=r-x)
+info: Suggested value of 493 sets permissions: u=rwx, g=r-x, o=r-x
 50 | dbm.ndbm.open("db", "r", 0o600)  # OK
 51 | 
 52 | os.fchmod(0, 256)  # 0o400
@@ -399,7 +399,7 @@ RUF064 [*] Non-octal mode
 57 | os.chmod("foo", 0000)  # Error
    |
 help: Replace with octal literal
-info: current value 000 will be interpreted as 0o0, permissions: u=---, g=---, o=---
+info: Current value of mode 000 (0o0) sets permissions: u=---, g=---, o=---)
 53 | os.fchmod(0, 493)  # 0o755
 54 | 
 55 | # https://github.com/astral-sh/ruff/issues/19010
@@ -420,7 +420,7 @@ RUF064 [*] Non-octal mode
 59 | os.chmod("foo", 0b0)  # Error
    |
 help: Replace with octal literal
-info: current value 0000 will be interpreted as 0o0, permissions: u=---, g=---, o=---
+info: Current value of mode 0000 (0o0) sets permissions: u=---, g=---, o=---)
 54 | 
 55 | # https://github.com/astral-sh/ruff/issues/19010
 56 | os.chmod("foo", 000)  # Error
@@ -441,7 +441,7 @@ RUF064 Non-octal mode
 61 | os.chmod("foo", 0)  # Ok
    |
 help: Replace with octal literal
-info: current value 0b0 will be interpreted as 0o0, permissions: u=---, g=---, o=---
+info: Current value of mode 0b0 (0o0) sets permissions: u=---, g=---, o=---)
 
 RUF064 Non-octal mode
   --> RUF064.py:60:17
@@ -452,4 +452,4 @@ RUF064 Non-octal mode
 61 | os.chmod("foo", 0)  # Ok
    |
 help: Replace with octal literal
-info: current value 0x0 will be interpreted as 0o0, permissions: u=---, g=---, o=---
+info: Current value of mode 0x0 (0o0) sets permissions: u=---, g=---, o=---)

From 25f28a6dae19ebcf3df54883b7729a920006cd57 Mon Sep 17 00:00:00 2001
From: Brent Westbrook <brentrwestbrook@gmail.com>
Date: Mon, 2 Feb 2026 12:54:44 -0500
Subject: [PATCH 4/9] report_diagnostic once

---
 .../src/rules/ruff/rules/non_octal_permissions.rs            | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs b/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs
index 93fbe47d41e10..e6e55d9a25925 100644
--- a/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs
+++ b/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs
@@ -111,13 +111,12 @@ pub(crate) fn non_octal_permissions(checker: &Checker, call: &ExprCall) {
         return;
     }
 
+    let mut diagnostic = checker.report_diagnostic(NonOctalPermissions, mode_arg.range());
+
     let Some(mode) = int.as_u16() else {
-        checker.report_diagnostic(NonOctalPermissions, mode_arg.range());
         return;
     };
 
-    let mut diagnostic = checker.report_diagnostic(NonOctalPermissions, mode_arg.range());
-
     diagnostic.info(format!(
         "Current value of mode {mode_literal} ({:#o}) sets permissions: {})",
         mode & 0o7777,

From c42520c5157e63a566dbd9f9e3f9c596ea66f37b Mon Sep 17 00:00:00 2001
From: Brent Westbrook <brentrwestbrook@gmail.com>
Date: Mon, 2 Feb 2026 12:55:57 -0500
Subject: [PATCH 5/9] extra paren

---
 .../rules/ruff/rules/non_octal_permissions.rs |  2 +-
 ..._rules__ruff__tests__RUF064_RUF064.py.snap | 44 +++++++++----------
 2 files changed, 23 insertions(+), 23 deletions(-)

diff --git a/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs b/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs
index e6e55d9a25925..c1520e07293d4 100644
--- a/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs
+++ b/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs
@@ -118,7 +118,7 @@ pub(crate) fn non_octal_permissions(checker: &Checker, call: &ExprCall) {
     };
 
     diagnostic.info(format!(
-        "Current value of mode {mode_literal} ({:#o}) sets permissions: {})",
+        "Current value of mode {mode_literal} ({:#o}) sets permissions: {}",
         mode & 0o7777,
         get_permissions(mode)
     ));
diff --git a/crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__RUF064_RUF064.py.snap b/crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__RUF064_RUF064.py.snap
index 2a9f96f5c58e4..ffd3da5046492 100644
--- a/crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__RUF064_RUF064.py.snap
+++ b/crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__RUF064_RUF064.py.snap
@@ -12,7 +12,7 @@ RUF064 [*] Non-octal mode
 8 | os.chmod("foo", 7777)  # Error
   |
 help: Replace with octal literal
-info: Current value of mode 444 (0o674) sets permissions: u=rw-, g=rwx, o=r--)
+info: Current value of mode 444 (0o674) sets permissions: u=rw-, g=rwx, o=r--
 info: Suggested value of 292 sets permissions: u=r--, g=r--, o=r--
 3 | import os
 4 | from pathlib import Path
@@ -35,7 +35,7 @@ RUF064 Non-octal mode
 10 | os.chmod("foo", 99999)  # Error
    |
 help: Replace with octal literal
-info: Current value of mode 7777 (0o7141) sets permissions: u=--x, g=r--, o=--x)
+info: Current value of mode 7777 (0o7141) sets permissions: u=--x, g=r--, o=--x
 
 RUF064 Non-octal mode
   --> RUF064.py:9:17
@@ -47,7 +47,7 @@ RUF064 Non-octal mode
 10 | os.chmod("foo", 99999)  # Error
    |
 help: Replace with octal literal
-info: Current value of mode 10000 (0o3420) sets permissions: u=r--, g=-w-, o=---)
+info: Current value of mode 10000 (0o3420) sets permissions: u=r--, g=-w-, o=---
 
 RUF064 Non-octal mode
   --> RUF064.py:10:17
@@ -71,7 +71,7 @@ RUF064 [*] Non-octal mode
 13 | os.umask(0o777)  # OK
    |
 help: Replace with octal literal
-info: Current value of mode 777 (0o1411) sets permissions: u=r--, g=--x, o=--x)
+info: Current value of mode 777 (0o1411) sets permissions: u=r--, g=--x, o=--x
 info: Suggested value of 511 sets permissions: u=rwx, g=rwx, o=rwx
 9  | os.chmod("foo", 10000)  # Error
 10 | os.chmod("foo", 99999)  # Error
@@ -93,7 +93,7 @@ RUF064 [*] Non-octal mode
 16 | os.fchmod(0, 0o400)  # OK
    |
 help: Replace with octal literal
-info: Current value of mode 400 (0o620) sets permissions: u=rw-, g=-w-, o=---)
+info: Current value of mode 400 (0o620) sets permissions: u=rw-, g=-w-, o=---
 info: Suggested value of 256 sets permissions: u=r--, g=---, o=---
 12 | os.umask(777)  # Error
 13 | os.umask(0o777)  # OK
@@ -115,7 +115,7 @@ RUF064 [*] Non-octal mode
 19 | os.lchmod("foo", 0o755)  # OK
    |
 help: Replace with octal literal
-info: Current value of mode 755 (0o1363) sets permissions: u=-wx, g=rw-, o=-wx)
+info: Current value of mode 755 (0o1363) sets permissions: u=-wx, g=rw-, o=-wx
 info: Suggested value of 493 sets permissions: u=rwx, g=r-x, o=r-x
 15 | os.fchmod(0, 400)  # Error
 16 | os.fchmod(0, 0o400)  # OK
@@ -137,7 +137,7 @@ RUF064 [*] Non-octal mode
 22 | os.mkdir("foo", 0o600)  # OK
    |
 help: Replace with octal literal
-info: Current value of mode 600 (0o1130) sets permissions: u=--x, g=-wx, o=---)
+info: Current value of mode 600 (0o1130) sets permissions: u=--x, g=-wx, o=---
 info: Suggested value of 384 sets permissions: u=rw-, g=---, o=---
 18 | os.lchmod("foo", 755)  # Error
 19 | os.lchmod("foo", 0o755)  # OK
@@ -159,7 +159,7 @@ RUF064 [*] Non-octal mode
 25 | os.makedirs("foo", 0o644)  # OK
    |
 help: Replace with octal literal
-info: Current value of mode 644 (0o1204) sets permissions: u=-w-, g=---, o=r--)
+info: Current value of mode 644 (0o1204) sets permissions: u=-w-, g=---, o=r--
 info: Suggested value of 420 sets permissions: u=rw-, g=r--, o=r--
 21 | os.mkdir("foo", 600)  # Error
 22 | os.mkdir("foo", 0o600)  # OK
@@ -181,7 +181,7 @@ RUF064 [*] Non-octal mode
 28 | os.mkfifo("foo", 0o640)  # OK
    |
 help: Replace with octal literal
-info: Current value of mode 640 (0o1200) sets permissions: u=-w-, g=---, o=---)
+info: Current value of mode 640 (0o1200) sets permissions: u=-w-, g=---, o=---
 info: Suggested value of 416 sets permissions: u=rw-, g=r--, o=---
 24 | os.makedirs("foo", 644)  # Error
 25 | os.makedirs("foo", 0o644)  # OK
@@ -203,7 +203,7 @@ RUF064 [*] Non-octal mode
 31 | os.mknod("foo", 0o660)  # OK
    |
 help: Replace with octal literal
-info: Current value of mode 660 (0o1224) sets permissions: u=-w-, g=-w-, o=r--)
+info: Current value of mode 660 (0o1224) sets permissions: u=-w-, g=-w-, o=r--
 info: Suggested value of 432 sets permissions: u=rw-, g=rw-, o=---
 27 | os.mkfifo("foo", 640)  # Error
 28 | os.mkfifo("foo", 0o640)  # OK
@@ -225,7 +225,7 @@ RUF064 [*] Non-octal mode
 34 | os.open("foo", os.O_CREAT, 0o644)  # OK
    |
 help: Replace with octal literal
-info: Current value of mode 644 (0o1204) sets permissions: u=-w-, g=---, o=r--)
+info: Current value of mode 644 (0o1204) sets permissions: u=-w-, g=---, o=r--
 info: Suggested value of 420 sets permissions: u=rw-, g=r--, o=r--
 30 | os.mknod("foo", 660)  # Error
 31 | os.mknod("foo", 0o660)  # OK
@@ -247,7 +247,7 @@ RUF064 [*] Non-octal mode
 37 | Path("bar").chmod(0o755)  # OK
    |
 help: Replace with octal literal
-info: Current value of mode 755 (0o1363) sets permissions: u=-wx, g=rw-, o=-wx)
+info: Current value of mode 755 (0o1363) sets permissions: u=-wx, g=rw-, o=-wx
 info: Suggested value of 493 sets permissions: u=rwx, g=r-x, o=r-x
 33 | os.open("foo", os.O_CREAT, 644)  # Error
 34 | os.open("foo", os.O_CREAT, 0o644)  # OK
@@ -268,7 +268,7 @@ RUF064 [*] Non-octal mode
 41 | path.chmod(0o755)  # OK
    |
 help: Replace with octal literal
-info: Current value of mode 755 (0o1363) sets permissions: u=-wx, g=rw-, o=-wx)
+info: Current value of mode 755 (0o1363) sets permissions: u=-wx, g=rw-, o=-wx
 info: Suggested value of 493 sets permissions: u=rwx, g=r-x, o=r-x
 37 | Path("bar").chmod(0o755)  # OK
 38 | 
@@ -290,7 +290,7 @@ RUF064 [*] Non-octal mode
 44 | dbm.open("db", "r", 0o600)  # OK
    |
 help: Replace with octal literal
-info: Current value of mode 600 (0o1130) sets permissions: u=--x, g=-wx, o=---)
+info: Current value of mode 600 (0o1130) sets permissions: u=--x, g=-wx, o=---
 info: Suggested value of 384 sets permissions: u=rw-, g=---, o=---
 40 | path.chmod(755)  # Error
 41 | path.chmod(0o755)  # OK
@@ -312,7 +312,7 @@ RUF064 [*] Non-octal mode
 47 | dbm.gnu.open("db", "r", 0o600)  # OK
    |
 help: Replace with octal literal
-info: Current value of mode 600 (0o1130) sets permissions: u=--x, g=-wx, o=---)
+info: Current value of mode 600 (0o1130) sets permissions: u=--x, g=-wx, o=---
 info: Suggested value of 384 sets permissions: u=rw-, g=---, o=---
 43 | dbm.open("db", "r", 600)  # Error
 44 | dbm.open("db", "r", 0o600)  # OK
@@ -334,7 +334,7 @@ RUF064 [*] Non-octal mode
 50 | dbm.ndbm.open("db", "r", 0o600)  # OK
    |
 help: Replace with octal literal
-info: Current value of mode 600 (0o1130) sets permissions: u=--x, g=-wx, o=---)
+info: Current value of mode 600 (0o1130) sets permissions: u=--x, g=-wx, o=---
 info: Suggested value of 384 sets permissions: u=rw-, g=---, o=---
 46 | dbm.gnu.open("db", "r", 600)  # Error
 47 | dbm.gnu.open("db", "r", 0o600)  # OK
@@ -356,7 +356,7 @@ RUF064 [*] Non-octal mode
 53 | os.fchmod(0, 493)  # 0o755
    |
 help: Replace with octal literal
-info: Current value of mode 256 (0o400) sets permissions: u=r--, g=---, o=---)
+info: Current value of mode 256 (0o400) sets permissions: u=r--, g=---, o=---
 info: Suggested value of 256 sets permissions: u=r--, g=---, o=---
 49 | dbm.ndbm.open("db", "r", 600)  # Error
 50 | dbm.ndbm.open("db", "r", 0o600)  # OK
@@ -378,7 +378,7 @@ RUF064 [*] Non-octal mode
 55 | # https://github.com/astral-sh/ruff/issues/19010
    |
 help: Replace with octal literal
-info: Current value of mode 493 (0o755) sets permissions: u=rwx, g=r-x, o=r-x)
+info: Current value of mode 493 (0o755) sets permissions: u=rwx, g=r-x, o=r-x
 info: Suggested value of 493 sets permissions: u=rwx, g=r-x, o=r-x
 50 | dbm.ndbm.open("db", "r", 0o600)  # OK
 51 | 
@@ -399,7 +399,7 @@ RUF064 [*] Non-octal mode
 57 | os.chmod("foo", 0000)  # Error
    |
 help: Replace with octal literal
-info: Current value of mode 000 (0o0) sets permissions: u=---, g=---, o=---)
+info: Current value of mode 000 (0o0) sets permissions: u=---, g=---, o=---
 53 | os.fchmod(0, 493)  # 0o755
 54 | 
 55 | # https://github.com/astral-sh/ruff/issues/19010
@@ -420,7 +420,7 @@ RUF064 [*] Non-octal mode
 59 | os.chmod("foo", 0b0)  # Error
    |
 help: Replace with octal literal
-info: Current value of mode 0000 (0o0) sets permissions: u=---, g=---, o=---)
+info: Current value of mode 0000 (0o0) sets permissions: u=---, g=---, o=---
 54 | 
 55 | # https://github.com/astral-sh/ruff/issues/19010
 56 | os.chmod("foo", 000)  # Error
@@ -441,7 +441,7 @@ RUF064 Non-octal mode
 61 | os.chmod("foo", 0)  # Ok
    |
 help: Replace with octal literal
-info: Current value of mode 0b0 (0o0) sets permissions: u=---, g=---, o=---)
+info: Current value of mode 0b0 (0o0) sets permissions: u=---, g=---, o=---
 
 RUF064 Non-octal mode
   --> RUF064.py:60:17
@@ -452,4 +452,4 @@ RUF064 Non-octal mode
 61 | os.chmod("foo", 0)  # Ok
    |
 help: Replace with octal literal
-info: Current value of mode 0x0 (0o0) sets permissions: u=---, g=---, o=---)
+info: Current value of mode 0x0 (0o0) sets permissions: u=---, g=---, o=---

From 80e00c4fc4d459f09dfcafe44b321153c4de6d5a Mon Sep 17 00:00:00 2001
From: Brent Westbrook <brentrwestbrook@gmail.com>
Date: Mon, 2 Feb 2026 12:57:05 -0500
Subject: [PATCH 6/9] show suggestion as octal

---
 .../rules/ruff/rules/non_octal_permissions.rs |  2 +-
 ..._rules__ruff__tests__RUF064_RUF064.py.snap | 32 +++++++++----------
 2 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs b/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs
index c1520e07293d4..a055fb644f83c 100644
--- a/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs
+++ b/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs
@@ -139,7 +139,7 @@ pub(crate) fn non_octal_permissions(checker: &Checker, call: &ExprCall) {
     };
     let suggested_permissions = get_permissions(suggested);
     diagnostic.info(format!(
-        "Suggested value of {suggested:#0} sets permissions: {suggested_permissions}"
+        "Suggested value of {suggested:#o} sets permissions: {suggested_permissions}"
     ));
     let edit = Edit::range_replacement(format!("{suggested:#o}"), mode_arg.range());
     diagnostic.set_fix(Fix::unsafe_edit(edit));
diff --git a/crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__RUF064_RUF064.py.snap b/crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__RUF064_RUF064.py.snap
index ffd3da5046492..8f230b641e3a8 100644
--- a/crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__RUF064_RUF064.py.snap
+++ b/crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__RUF064_RUF064.py.snap
@@ -13,7 +13,7 @@ RUF064 [*] Non-octal mode
   |
 help: Replace with octal literal
 info: Current value of mode 444 (0o674) sets permissions: u=rw-, g=rwx, o=r--
-info: Suggested value of 292 sets permissions: u=r--, g=r--, o=r--
+info: Suggested value of 0o444 sets permissions: u=r--, g=r--, o=r--
 3 | import os
 4 | from pathlib import Path
 5 | 
@@ -72,7 +72,7 @@ RUF064 [*] Non-octal mode
    |
 help: Replace with octal literal
 info: Current value of mode 777 (0o1411) sets permissions: u=r--, g=--x, o=--x
-info: Suggested value of 511 sets permissions: u=rwx, g=rwx, o=rwx
+info: Suggested value of 0o777 sets permissions: u=rwx, g=rwx, o=rwx
 9  | os.chmod("foo", 10000)  # Error
 10 | os.chmod("foo", 99999)  # Error
 11 | 
@@ -94,7 +94,7 @@ RUF064 [*] Non-octal mode
    |
 help: Replace with octal literal
 info: Current value of mode 400 (0o620) sets permissions: u=rw-, g=-w-, o=---
-info: Suggested value of 256 sets permissions: u=r--, g=---, o=---
+info: Suggested value of 0o400 sets permissions: u=r--, g=---, o=---
 12 | os.umask(777)  # Error
 13 | os.umask(0o777)  # OK
 14 | 
@@ -116,7 +116,7 @@ RUF064 [*] Non-octal mode
    |
 help: Replace with octal literal
 info: Current value of mode 755 (0o1363) sets permissions: u=-wx, g=rw-, o=-wx
-info: Suggested value of 493 sets permissions: u=rwx, g=r-x, o=r-x
+info: Suggested value of 0o755 sets permissions: u=rwx, g=r-x, o=r-x
 15 | os.fchmod(0, 400)  # Error
 16 | os.fchmod(0, 0o400)  # OK
 17 | 
@@ -138,7 +138,7 @@ RUF064 [*] Non-octal mode
    |
 help: Replace with octal literal
 info: Current value of mode 600 (0o1130) sets permissions: u=--x, g=-wx, o=---
-info: Suggested value of 384 sets permissions: u=rw-, g=---, o=---
+info: Suggested value of 0o600 sets permissions: u=rw-, g=---, o=---
 18 | os.lchmod("foo", 755)  # Error
 19 | os.lchmod("foo", 0o755)  # OK
 20 | 
@@ -160,7 +160,7 @@ RUF064 [*] Non-octal mode
    |
 help: Replace with octal literal
 info: Current value of mode 644 (0o1204) sets permissions: u=-w-, g=---, o=r--
-info: Suggested value of 420 sets permissions: u=rw-, g=r--, o=r--
+info: Suggested value of 0o644 sets permissions: u=rw-, g=r--, o=r--
 21 | os.mkdir("foo", 600)  # Error
 22 | os.mkdir("foo", 0o600)  # OK
 23 | 
@@ -182,7 +182,7 @@ RUF064 [*] Non-octal mode
    |
 help: Replace with octal literal
 info: Current value of mode 640 (0o1200) sets permissions: u=-w-, g=---, o=---
-info: Suggested value of 416 sets permissions: u=rw-, g=r--, o=---
+info: Suggested value of 0o640 sets permissions: u=rw-, g=r--, o=---
 24 | os.makedirs("foo", 644)  # Error
 25 | os.makedirs("foo", 0o644)  # OK
 26 | 
@@ -204,7 +204,7 @@ RUF064 [*] Non-octal mode
    |
 help: Replace with octal literal
 info: Current value of mode 660 (0o1224) sets permissions: u=-w-, g=-w-, o=r--
-info: Suggested value of 432 sets permissions: u=rw-, g=rw-, o=---
+info: Suggested value of 0o660 sets permissions: u=rw-, g=rw-, o=---
 27 | os.mkfifo("foo", 640)  # Error
 28 | os.mkfifo("foo", 0o640)  # OK
 29 | 
@@ -226,7 +226,7 @@ RUF064 [*] Non-octal mode
    |
 help: Replace with octal literal
 info: Current value of mode 644 (0o1204) sets permissions: u=-w-, g=---, o=r--
-info: Suggested value of 420 sets permissions: u=rw-, g=r--, o=r--
+info: Suggested value of 0o644 sets permissions: u=rw-, g=r--, o=r--
 30 | os.mknod("foo", 660)  # Error
 31 | os.mknod("foo", 0o660)  # OK
 32 | 
@@ -248,7 +248,7 @@ RUF064 [*] Non-octal mode
    |
 help: Replace with octal literal
 info: Current value of mode 755 (0o1363) sets permissions: u=-wx, g=rw-, o=-wx
-info: Suggested value of 493 sets permissions: u=rwx, g=r-x, o=r-x
+info: Suggested value of 0o755 sets permissions: u=rwx, g=r-x, o=r-x
 33 | os.open("foo", os.O_CREAT, 644)  # Error
 34 | os.open("foo", os.O_CREAT, 0o644)  # OK
 35 | 
@@ -269,7 +269,7 @@ RUF064 [*] Non-octal mode
    |
 help: Replace with octal literal
 info: Current value of mode 755 (0o1363) sets permissions: u=-wx, g=rw-, o=-wx
-info: Suggested value of 493 sets permissions: u=rwx, g=r-x, o=r-x
+info: Suggested value of 0o755 sets permissions: u=rwx, g=r-x, o=r-x
 37 | Path("bar").chmod(0o755)  # OK
 38 | 
 39 | path = Path("bar")
@@ -291,7 +291,7 @@ RUF064 [*] Non-octal mode
    |
 help: Replace with octal literal
 info: Current value of mode 600 (0o1130) sets permissions: u=--x, g=-wx, o=---
-info: Suggested value of 384 sets permissions: u=rw-, g=---, o=---
+info: Suggested value of 0o600 sets permissions: u=rw-, g=---, o=---
 40 | path.chmod(755)  # Error
 41 | path.chmod(0o755)  # OK
 42 | 
@@ -313,7 +313,7 @@ RUF064 [*] Non-octal mode
    |
 help: Replace with octal literal
 info: Current value of mode 600 (0o1130) sets permissions: u=--x, g=-wx, o=---
-info: Suggested value of 384 sets permissions: u=rw-, g=---, o=---
+info: Suggested value of 0o600 sets permissions: u=rw-, g=---, o=---
 43 | dbm.open("db", "r", 600)  # Error
 44 | dbm.open("db", "r", 0o600)  # OK
 45 | 
@@ -335,7 +335,7 @@ RUF064 [*] Non-octal mode
    |
 help: Replace with octal literal
 info: Current value of mode 600 (0o1130) sets permissions: u=--x, g=-wx, o=---
-info: Suggested value of 384 sets permissions: u=rw-, g=---, o=---
+info: Suggested value of 0o600 sets permissions: u=rw-, g=---, o=---
 46 | dbm.gnu.open("db", "r", 600)  # Error
 47 | dbm.gnu.open("db", "r", 0o600)  # OK
 48 | 
@@ -357,7 +357,7 @@ RUF064 [*] Non-octal mode
    |
 help: Replace with octal literal
 info: Current value of mode 256 (0o400) sets permissions: u=r--, g=---, o=---
-info: Suggested value of 256 sets permissions: u=r--, g=---, o=---
+info: Suggested value of 0o400 sets permissions: u=r--, g=---, o=---
 49 | dbm.ndbm.open("db", "r", 600)  # Error
 50 | dbm.ndbm.open("db", "r", 0o600)  # OK
 51 | 
@@ -379,7 +379,7 @@ RUF064 [*] Non-octal mode
    |
 help: Replace with octal literal
 info: Current value of mode 493 (0o755) sets permissions: u=rwx, g=r-x, o=r-x
-info: Suggested value of 493 sets permissions: u=rwx, g=r-x, o=r-x
+info: Suggested value of 0o755 sets permissions: u=rwx, g=r-x, o=r-x
 50 | dbm.ndbm.open("db", "r", 0o600)  # OK
 51 | 
 52 | os.fchmod(0, 256)  # 0o400

From 07694d36b97a18c0f41cded7414a55adf1b152cd Mon Sep 17 00:00:00 2001
From: Brent Westbrook <brentrwestbrook@gmail.com>
Date: Mon, 2 Feb 2026 12:59:27 -0500
Subject: [PATCH 7/9] drop `mode` to parallel the suggestion message

---
 .../rules/ruff/rules/non_octal_permissions.rs |  2 +-
 ..._rules__ruff__tests__RUF064_RUF064.py.snap | 44 +++++++++----------
 2 files changed, 23 insertions(+), 23 deletions(-)

diff --git a/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs b/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs
index a055fb644f83c..2d23c0ceeb8f9 100644
--- a/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs
+++ b/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs
@@ -118,7 +118,7 @@ pub(crate) fn non_octal_permissions(checker: &Checker, call: &ExprCall) {
     };
 
     diagnostic.info(format!(
-        "Current value of mode {mode_literal} ({:#o}) sets permissions: {}",
+        "Current value of {mode_literal} ({:#o}) sets permissions: {}",
         mode & 0o7777,
         get_permissions(mode)
     ));
diff --git a/crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__RUF064_RUF064.py.snap b/crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__RUF064_RUF064.py.snap
index 8f230b641e3a8..191c7e30f3978 100644
--- a/crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__RUF064_RUF064.py.snap
+++ b/crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__RUF064_RUF064.py.snap
@@ -12,7 +12,7 @@ RUF064 [*] Non-octal mode
 8 | os.chmod("foo", 7777)  # Error
   |
 help: Replace with octal literal
-info: Current value of mode 444 (0o674) sets permissions: u=rw-, g=rwx, o=r--
+info: Current value of 444 (0o674) sets permissions: u=rw-, g=rwx, o=r--
 info: Suggested value of 0o444 sets permissions: u=r--, g=r--, o=r--
 3 | import os
 4 | from pathlib import Path
@@ -35,7 +35,7 @@ RUF064 Non-octal mode
 10 | os.chmod("foo", 99999)  # Error
    |
 help: Replace with octal literal
-info: Current value of mode 7777 (0o7141) sets permissions: u=--x, g=r--, o=--x
+info: Current value of 7777 (0o7141) sets permissions: u=--x, g=r--, o=--x
 
 RUF064 Non-octal mode
   --> RUF064.py:9:17
@@ -47,7 +47,7 @@ RUF064 Non-octal mode
 10 | os.chmod("foo", 99999)  # Error
    |
 help: Replace with octal literal
-info: Current value of mode 10000 (0o3420) sets permissions: u=r--, g=-w-, o=---
+info: Current value of 10000 (0o3420) sets permissions: u=r--, g=-w-, o=---
 
 RUF064 Non-octal mode
   --> RUF064.py:10:17
@@ -71,7 +71,7 @@ RUF064 [*] Non-octal mode
 13 | os.umask(0o777)  # OK
    |
 help: Replace with octal literal
-info: Current value of mode 777 (0o1411) sets permissions: u=r--, g=--x, o=--x
+info: Current value of 777 (0o1411) sets permissions: u=r--, g=--x, o=--x
 info: Suggested value of 0o777 sets permissions: u=rwx, g=rwx, o=rwx
 9  | os.chmod("foo", 10000)  # Error
 10 | os.chmod("foo", 99999)  # Error
@@ -93,7 +93,7 @@ RUF064 [*] Non-octal mode
 16 | os.fchmod(0, 0o400)  # OK
    |
 help: Replace with octal literal
-info: Current value of mode 400 (0o620) sets permissions: u=rw-, g=-w-, o=---
+info: Current value of 400 (0o620) sets permissions: u=rw-, g=-w-, o=---
 info: Suggested value of 0o400 sets permissions: u=r--, g=---, o=---
 12 | os.umask(777)  # Error
 13 | os.umask(0o777)  # OK
@@ -115,7 +115,7 @@ RUF064 [*] Non-octal mode
 19 | os.lchmod("foo", 0o755)  # OK
    |
 help: Replace with octal literal
-info: Current value of mode 755 (0o1363) sets permissions: u=-wx, g=rw-, o=-wx
+info: Current value of 755 (0o1363) sets permissions: u=-wx, g=rw-, o=-wx
 info: Suggested value of 0o755 sets permissions: u=rwx, g=r-x, o=r-x
 15 | os.fchmod(0, 400)  # Error
 16 | os.fchmod(0, 0o400)  # OK
@@ -137,7 +137,7 @@ RUF064 [*] Non-octal mode
 22 | os.mkdir("foo", 0o600)  # OK
    |
 help: Replace with octal literal
-info: Current value of mode 600 (0o1130) sets permissions: u=--x, g=-wx, o=---
+info: Current value of 600 (0o1130) sets permissions: u=--x, g=-wx, o=---
 info: Suggested value of 0o600 sets permissions: u=rw-, g=---, o=---
 18 | os.lchmod("foo", 755)  # Error
 19 | os.lchmod("foo", 0o755)  # OK
@@ -159,7 +159,7 @@ RUF064 [*] Non-octal mode
 25 | os.makedirs("foo", 0o644)  # OK
    |
 help: Replace with octal literal
-info: Current value of mode 644 (0o1204) sets permissions: u=-w-, g=---, o=r--
+info: Current value of 644 (0o1204) sets permissions: u=-w-, g=---, o=r--
 info: Suggested value of 0o644 sets permissions: u=rw-, g=r--, o=r--
 21 | os.mkdir("foo", 600)  # Error
 22 | os.mkdir("foo", 0o600)  # OK
@@ -181,7 +181,7 @@ RUF064 [*] Non-octal mode
 28 | os.mkfifo("foo", 0o640)  # OK
    |
 help: Replace with octal literal
-info: Current value of mode 640 (0o1200) sets permissions: u=-w-, g=---, o=---
+info: Current value of 640 (0o1200) sets permissions: u=-w-, g=---, o=---
 info: Suggested value of 0o640 sets permissions: u=rw-, g=r--, o=---
 24 | os.makedirs("foo", 644)  # Error
 25 | os.makedirs("foo", 0o644)  # OK
@@ -203,7 +203,7 @@ RUF064 [*] Non-octal mode
 31 | os.mknod("foo", 0o660)  # OK
    |
 help: Replace with octal literal
-info: Current value of mode 660 (0o1224) sets permissions: u=-w-, g=-w-, o=r--
+info: Current value of 660 (0o1224) sets permissions: u=-w-, g=-w-, o=r--
 info: Suggested value of 0o660 sets permissions: u=rw-, g=rw-, o=---
 27 | os.mkfifo("foo", 640)  # Error
 28 | os.mkfifo("foo", 0o640)  # OK
@@ -225,7 +225,7 @@ RUF064 [*] Non-octal mode
 34 | os.open("foo", os.O_CREAT, 0o644)  # OK
    |
 help: Replace with octal literal
-info: Current value of mode 644 (0o1204) sets permissions: u=-w-, g=---, o=r--
+info: Current value of 644 (0o1204) sets permissions: u=-w-, g=---, o=r--
 info: Suggested value of 0o644 sets permissions: u=rw-, g=r--, o=r--
 30 | os.mknod("foo", 660)  # Error
 31 | os.mknod("foo", 0o660)  # OK
@@ -247,7 +247,7 @@ RUF064 [*] Non-octal mode
 37 | Path("bar").chmod(0o755)  # OK
    |
 help: Replace with octal literal
-info: Current value of mode 755 (0o1363) sets permissions: u=-wx, g=rw-, o=-wx
+info: Current value of 755 (0o1363) sets permissions: u=-wx, g=rw-, o=-wx
 info: Suggested value of 0o755 sets permissions: u=rwx, g=r-x, o=r-x
 33 | os.open("foo", os.O_CREAT, 644)  # Error
 34 | os.open("foo", os.O_CREAT, 0o644)  # OK
@@ -268,7 +268,7 @@ RUF064 [*] Non-octal mode
 41 | path.chmod(0o755)  # OK
    |
 help: Replace with octal literal
-info: Current value of mode 755 (0o1363) sets permissions: u=-wx, g=rw-, o=-wx
+info: Current value of 755 (0o1363) sets permissions: u=-wx, g=rw-, o=-wx
 info: Suggested value of 0o755 sets permissions: u=rwx, g=r-x, o=r-x
 37 | Path("bar").chmod(0o755)  # OK
 38 | 
@@ -290,7 +290,7 @@ RUF064 [*] Non-octal mode
 44 | dbm.open("db", "r", 0o600)  # OK
    |
 help: Replace with octal literal
-info: Current value of mode 600 (0o1130) sets permissions: u=--x, g=-wx, o=---
+info: Current value of 600 (0o1130) sets permissions: u=--x, g=-wx, o=---
 info: Suggested value of 0o600 sets permissions: u=rw-, g=---, o=---
 40 | path.chmod(755)  # Error
 41 | path.chmod(0o755)  # OK
@@ -312,7 +312,7 @@ RUF064 [*] Non-octal mode
 47 | dbm.gnu.open("db", "r", 0o600)  # OK
    |
 help: Replace with octal literal
-info: Current value of mode 600 (0o1130) sets permissions: u=--x, g=-wx, o=---
+info: Current value of 600 (0o1130) sets permissions: u=--x, g=-wx, o=---
 info: Suggested value of 0o600 sets permissions: u=rw-, g=---, o=---
 43 | dbm.open("db", "r", 600)  # Error
 44 | dbm.open("db", "r", 0o600)  # OK
@@ -334,7 +334,7 @@ RUF064 [*] Non-octal mode
 50 | dbm.ndbm.open("db", "r", 0o600)  # OK
    |
 help: Replace with octal literal
-info: Current value of mode 600 (0o1130) sets permissions: u=--x, g=-wx, o=---
+info: Current value of 600 (0o1130) sets permissions: u=--x, g=-wx, o=---
 info: Suggested value of 0o600 sets permissions: u=rw-, g=---, o=---
 46 | dbm.gnu.open("db", "r", 600)  # Error
 47 | dbm.gnu.open("db", "r", 0o600)  # OK
@@ -356,7 +356,7 @@ RUF064 [*] Non-octal mode
 53 | os.fchmod(0, 493)  # 0o755
    |
 help: Replace with octal literal
-info: Current value of mode 256 (0o400) sets permissions: u=r--, g=---, o=---
+info: Current value of 256 (0o400) sets permissions: u=r--, g=---, o=---
 info: Suggested value of 0o400 sets permissions: u=r--, g=---, o=---
 49 | dbm.ndbm.open("db", "r", 600)  # Error
 50 | dbm.ndbm.open("db", "r", 0o600)  # OK
@@ -378,7 +378,7 @@ RUF064 [*] Non-octal mode
 55 | # https://github.com/astral-sh/ruff/issues/19010
    |
 help: Replace with octal literal
-info: Current value of mode 493 (0o755) sets permissions: u=rwx, g=r-x, o=r-x
+info: Current value of 493 (0o755) sets permissions: u=rwx, g=r-x, o=r-x
 info: Suggested value of 0o755 sets permissions: u=rwx, g=r-x, o=r-x
 50 | dbm.ndbm.open("db", "r", 0o600)  # OK
 51 | 
@@ -399,7 +399,7 @@ RUF064 [*] Non-octal mode
 57 | os.chmod("foo", 0000)  # Error
    |
 help: Replace with octal literal
-info: Current value of mode 000 (0o0) sets permissions: u=---, g=---, o=---
+info: Current value of 000 (0o0) sets permissions: u=---, g=---, o=---
 53 | os.fchmod(0, 493)  # 0o755
 54 | 
 55 | # https://github.com/astral-sh/ruff/issues/19010
@@ -420,7 +420,7 @@ RUF064 [*] Non-octal mode
 59 | os.chmod("foo", 0b0)  # Error
    |
 help: Replace with octal literal
-info: Current value of mode 0000 (0o0) sets permissions: u=---, g=---, o=---
+info: Current value of 0000 (0o0) sets permissions: u=---, g=---, o=---
 54 | 
 55 | # https://github.com/astral-sh/ruff/issues/19010
 56 | os.chmod("foo", 000)  # Error
@@ -441,7 +441,7 @@ RUF064 Non-octal mode
 61 | os.chmod("foo", 0)  # Ok
    |
 help: Replace with octal literal
-info: Current value of mode 0b0 (0o0) sets permissions: u=---, g=---, o=---
+info: Current value of 0b0 (0o0) sets permissions: u=---, g=---, o=---
 
 RUF064 Non-octal mode
   --> RUF064.py:60:17
@@ -452,4 +452,4 @@ RUF064 Non-octal mode
 61 | os.chmod("foo", 0)  # Ok
    |
 help: Replace with octal literal
-info: Current value of mode 0x0 (0o0) sets permissions: u=---, g=---, o=---
+info: Current value of 0x0 (0o0) sets permissions: u=---, g=---, o=---

From 27047ad42874d491653c996e3e01208bf85f861c Mon Sep 17 00:00:00 2001
From: Brent Westbrook <brentrwestbrook@gmail.com>
Date: Mon, 2 Feb 2026 13:04:49 -0500
Subject: [PATCH 8/9] pad to at least 3 octal digits

---
 .../src/rules/ruff/rules/non_octal_permissions.rs         | 4 ++--
 ...ruff_linter__rules__ruff__tests__RUF064_RUF064.py.snap | 8 ++++----
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs b/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs
index 2d23c0ceeb8f9..fc8862f8d94ea 100644
--- a/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs
+++ b/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs
@@ -118,7 +118,7 @@ pub(crate) fn non_octal_permissions(checker: &Checker, call: &ExprCall) {
     };
 
     diagnostic.info(format!(
-        "Current value of {mode_literal} ({:#o}) sets permissions: {}",
+        "Current value of {mode_literal} ({:#05o}) sets permissions: {}",
         mode & 0o7777,
         get_permissions(mode)
     ));
@@ -139,7 +139,7 @@ pub(crate) fn non_octal_permissions(checker: &Checker, call: &ExprCall) {
     };
     let suggested_permissions = get_permissions(suggested);
     diagnostic.info(format!(
-        "Suggested value of {suggested:#o} sets permissions: {suggested_permissions}"
+        "Suggested value of {suggested:#05o} sets permissions: {suggested_permissions}"
     ));
     let edit = Edit::range_replacement(format!("{suggested:#o}"), mode_arg.range());
     diagnostic.set_fix(Fix::unsafe_edit(edit));
diff --git a/crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__RUF064_RUF064.py.snap b/crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__RUF064_RUF064.py.snap
index 191c7e30f3978..7d5a58f758412 100644
--- a/crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__RUF064_RUF064.py.snap
+++ b/crates/ruff_linter/src/rules/ruff/snapshots/ruff_linter__rules__ruff__tests__RUF064_RUF064.py.snap
@@ -399,7 +399,7 @@ RUF064 [*] Non-octal mode
 57 | os.chmod("foo", 0000)  # Error
    |
 help: Replace with octal literal
-info: Current value of 000 (0o0) sets permissions: u=---, g=---, o=---
+info: Current value of 000 (0o000) sets permissions: u=---, g=---, o=---
 53 | os.fchmod(0, 493)  # 0o755
 54 | 
 55 | # https://github.com/astral-sh/ruff/issues/19010
@@ -420,7 +420,7 @@ RUF064 [*] Non-octal mode
 59 | os.chmod("foo", 0b0)  # Error
    |
 help: Replace with octal literal
-info: Current value of 0000 (0o0) sets permissions: u=---, g=---, o=---
+info: Current value of 0000 (0o000) sets permissions: u=---, g=---, o=---
 54 | 
 55 | # https://github.com/astral-sh/ruff/issues/19010
 56 | os.chmod("foo", 000)  # Error
@@ -441,7 +441,7 @@ RUF064 Non-octal mode
 61 | os.chmod("foo", 0)  # Ok
    |
 help: Replace with octal literal
-info: Current value of 0b0 (0o0) sets permissions: u=---, g=---, o=---
+info: Current value of 0b0 (0o000) sets permissions: u=---, g=---, o=---
 
 RUF064 Non-octal mode
   --> RUF064.py:60:17
@@ -452,4 +452,4 @@ RUF064 Non-octal mode
 61 | os.chmod("foo", 0)  # Ok
    |
 help: Replace with octal literal
-info: Current value of 0x0 (0o0) sets permissions: u=---, g=---, o=---
+info: Current value of 0x0 (0o000) sets permissions: u=---, g=---, o=---

From 7adcc5b7eb97ad7b63d35a27993b6e8533933a1f Mon Sep 17 00:00:00 2001
From: Brent Westbrook <brentrwestbrook@gmail.com>
Date: Mon, 2 Feb 2026 13:17:42 -0500
Subject: [PATCH 9/9] format -> format_args

---
 .../ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs b/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs
index fc8862f8d94ea..fdfda6071423a 100644
--- a/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs
+++ b/crates/ruff_linter/src/rules/ruff/rules/non_octal_permissions.rs
@@ -117,7 +117,7 @@ pub(crate) fn non_octal_permissions(checker: &Checker, call: &ExprCall) {
         return;
     };
 
-    diagnostic.info(format!(
+    diagnostic.info(format_args!(
         "Current value of {mode_literal} ({:#05o}) sets permissions: {}",
         mode & 0o7777,
         get_permissions(mode)
@@ -138,7 +138,7 @@ pub(crate) fn non_octal_permissions(checker: &Checker, call: &ExprCall) {
         return;
     };
     let suggested_permissions = get_permissions(suggested);
-    diagnostic.info(format!(
+    diagnostic.info(format_args!(
         "Suggested value of {suggested:#05o} sets permissions: {suggested_permissions}"
     ));
     let edit = Edit::range_replacement(format!("{suggested:#o}"), mode_arg.range());