From bf242b15e1f7873bdb940c2441b5e57747bc2f81 Mon Sep 17 00:00:00 2001
From: jvoisin
Date: Wed, 12 Nov 2025 22:28:13 +0100
Subject: Add `access` annotations

---
 include/stdio.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'include/stdio.h')

diff --git a/include/stdio.h b/include/stdio.h
index a75c9ea..67738ed 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -37,6 +37,8 @@ extern "C" {
 #undef snprintf
 #undef sprintf
 
+__access(read_write, 1, 2)
+__access(read_only, 3)
 _FORTIFY_FN(fgets) char *fgets(char * _FORTIFY_POS0 __s, int __n, FILE *__f)
 {
 	size_t __b = __bos(__s, 0);
@@ -46,6 +48,8 @@ _FORTIFY_FN(fgets) char *fgets(char * _FORTIFY_POS0 __s, int __n, FILE *__f)
 	return __orig_fgets(__s, __n, __f);
 }
 
+__access(write_only, 1)
+__access(read_only, 4)
 _FORTIFY_FN(fread) size_t fread(void * _FORTIFY_POS0 __d, size_t __n,
                                 size_t __m, FILE *__f)
 {
@@ -58,6 +62,8 @@ _FORTIFY_FN(fread) size_t fread(void * _FORTIFY_POS0 __d, size_t __n,
 	return __orig_fread(__d, __n, __m, __f);
 }
 
+__access(read_only, 1)
+__access(write_only, 4)
 _FORTIFY_FN(fwrite) size_t fwrite(const void * _FORTIFY_POS0 __d, size_t __n,
                                   size_t __m, FILE *__f)
 {
@@ -70,6 +76,8 @@ _FORTIFY_FN(fwrite) size_t fwrite(const void * _FORTIFY_POS0 __d, size_t __n,
 	return __orig_fwrite(__d, __n, __m, __f);
 }
 
+__access(write_only, 1, 2)
+__access(read_only, 3)
 _FORTIFY_FN(vsnprintf) int vsnprintf(char * _FORTIFY_POS0 __s, size_t __n,
                                      const char *__f, __builtin_va_list __v)
 {
@@ -80,6 +88,8 @@ _FORTIFY_FN(vsnprintf) int vsnprintf(char * _FORTIFY_POS0 __s, size_t __n,
 	return __orig_vsnprintf(__s, __n, __f, __v);
 }
 
+__access(write_only, 1)
+__access(read_only, 2)
 _FORTIFY_FN(vsprintf) int vsprintf(char * _FORTIFY_POS0 __s, const char *__f,
                                    __builtin_va_list __v)
 {
-- 
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