linux-kernel - [PATCH v2 03/15] tools/nolibc: add more stat() variants

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20250428-nolibc-misc-v2-3-3c043eeab06c@linutronix.de>
Date: Mon, 28 Apr 2025 14:40:04 +0200
From: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
To: Willy Tarreau <w@....eu>, 
 Thomas Weißschuh <linux@...ssschuh.net>, 
 Shuah Khan <shuah@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org, 
 Thomas Weißschuh <thomas.weissschuh@...utronix.de>
Subject: [PATCH v2 03/15] tools/nolibc: add more stat() variants

Add fstat(), fstatat() and lstat(). All of them use the existing implementation
based on statx().

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
Acked-by: Willy Tarreau <w@....eu>
---
 tools/include/nolibc/sys/stat.h | 25 +++++++++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)

diff --git a/tools/include/nolibc/sys/stat.h b/tools/include/nolibc/sys/stat.h
index 987c8bb52502f1f758005b0afdfb2e39fc8ea1c6..8b4d80e3ea0360e3e6280f6c6166e87f793ddee4 100644
--- a/tools/include/nolibc/sys/stat.h
+++ b/tools/include/nolibc/sys/stat.h
@@ -17,6 +17,9 @@
 /*
  * int statx(int fd, const char *path, int flags, unsigned int mask, struct statx *buf);
  * int stat(const char *path, struct stat *buf);
+ * int fstatat(int fd, const char *path, struct stat *buf, int flag);
+ * int fstat(int fildes, struct stat *buf);
+ * int lstat(const char *path, struct stat *buf);
  */
 
 static __attribute__((unused))
@@ -37,12 +40,12 @@ int statx(int fd, const char *path, int flags, unsigned int mask, struct statx *
 
 
 static __attribute__((unused))
-int stat(const char *path, struct stat *buf)
+int fstatat(int fd, const char *path, struct stat *buf, int flag)
 {
 	struct statx statx;
 	long ret;
 
-	ret = __sysret(sys_statx(AT_FDCWD, path, AT_NO_AUTOMOUNT, STATX_BASIC_STATS, &statx));
+	ret = __sysret(sys_statx(fd, path, flag | AT_NO_AUTOMOUNT, STATX_BASIC_STATS, &statx));
 	if (ret == -1)
 		return ret;
 
@@ -70,4 +73,22 @@ int stat(const char *path, struct stat *buf)
 	return 0;
 }
 
+static __attribute__((unused))
+int stat(const char *path, struct stat *buf)
+{
+	return fstatat(AT_FDCWD, path, buf, 0);
+}
+
+static __attribute__((unused))
+int fstat(int fildes, struct stat *buf)
+{
+	return fstatat(fildes, "", buf, AT_EMPTY_PATH);
+}
+
+static __attribute__((unused))
+int lstat(const char *path, struct stat *buf)
+{
+	return fstatat(AT_FDCWD, path, buf, AT_SYMLINK_NOFOLLOW);
+}
+
 #endif /* _NOLIBC_SYS_STAT_H */

-- 
2.49.0