tools/nolibc: move open() and friends to fcntl.h

This is the location regular userspace expects these definitions.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250416-nolibc-split-sys-v1-3-a069a3f1d145@linutronix.de
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>

5 files changed, 72 insertions, 52 deletions

diff --git a/tools/include/nolibc/Makefile b/tools/include/nolibc/Makefile
index fd76d267d79a..2132e4f4d216 100644
--- a/tools/include/nolibc/Makefile
+++ b/tools/include/nolibc/Makefile
@@ -32,6 +32,7 @@ all_files := \
 		dirent.h \
 		elf.h \
 		errno.h \
+		fcntl.h \
 		limits.h \
 		nolibc.h \
 		signal.h \
diff --git a/tools/include/nolibc/dirent.h b/tools/include/nolibc/dirent.h
index 946a697e98e4..6c60ec4ba27b 100644
--- a/tools/include/nolibc/dirent.h
+++ b/tools/include/nolibc/dirent.h
@@ -10,6 +10,7 @@
 #include "compiler.h"
 #include "stdint.h"
 #include "types.h"
+#include "fcntl.h"
 
 #include <linux/limits.h>
 
diff --git a/tools/include/nolibc/fcntl.h b/tools/include/nolibc/fcntl.h
new file mode 100644
index 000000000000..5feb08ad54a7
--- /dev/null
+++ b/tools/include/nolibc/fcntl.h
@@ -0,0 +1,69 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * fcntl definition for NOLIBC
+ * Copyright (C) 2017-2021 Willy Tarreau <w@1wt.eu>
+ */
+
+#ifndef _NOLIBC_FCNTL_H
+#define _NOLIBC_FCNTL_H
+
+#include "arch.h"
+#include "types.h"
+#include "sys.h"
+
+/*
+ * int openat(int dirfd, const char *path, int flags[, mode_t mode]);
+ */
+
+static __attribute__((unused))
+int sys_openat(int dirfd, const char *path, int flags, mode_t mode)
+{
+	return my_syscall4(__NR_openat, dirfd, path, flags, mode);
+}
+
+static __attribute__((unused))
+int openat(int dirfd, const char *path, int flags, ...)
+{
+	mode_t mode = 0;
+
+	if (flags & O_CREAT) {
+		va_list args;
+
+		va_start(args, flags);
+		mode = va_arg(args, mode_t);
+		va_end(args);
+	}
+
+	return __sysret(sys_openat(dirfd, path, flags, mode));
+}
+
+/*
+ * int open(const char *path, int flags[, mode_t mode]);
+ */
+
+static __attribute__((unused))
+int sys_open(const char *path, int flags, mode_t mode)
+{
+	return my_syscall4(__NR_openat, AT_FDCWD, path, flags, mode);
+}
+
+static __attribute__((unused))
+int open(const char *path, int flags, ...)
+{
+	mode_t mode = 0;
+
+	if (flags & O_CREAT) {
+		va_list args;
+
+		va_start(args, flags);
+		mode = va_arg(args, mode_t);
+		va_end(args);
+	}
+
+	return __sysret(sys_open(path, flags, mode));
+}
+
+/* make sure to include all global symbols */
+#include "nolibc.h"
+
+#endif /* _NOLIBC_FCNTL_H */
diff --git a/tools/include/nolibc/nolibc.h b/tools/include/nolibc/nolibc.h
index 127f0d9068c6..bb4183a8fdc4 100644
--- a/tools/include/nolibc/nolibc.h
+++ b/tools/include/nolibc/nolibc.h
@@ -106,6 +106,7 @@
 #include "time.h"
 #include "stackprotector.h"
 #include "dirent.h"
+#include "fcntl.h"
 
 /* Used by programs to avoid std includes */
 #define NOLIBC
diff --git a/tools/include/nolibc/sys.h b/tools/include/nolibc/sys.h
index 08c1c074bec8..5fa351e6a351 100644
--- a/tools/include/nolibc/sys.h
+++ b/tools/include/nolibc/sys.h
@@ -764,58 +764,6 @@ int mount(const char *src, const char *tgt,
 	return __sysret(sys_mount(src, tgt, fst, flags, data));
 }
 
-/*
- * int openat(int dirfd, const char *path, int flags[, mode_t mode]);
- */
-
-static __attribute__((unused))
-int sys_openat(int dirfd, const char *path, int flags, mode_t mode)
-{
-	return my_syscall4(__NR_openat, dirfd, path, flags, mode);
-}
-
-static __attribute__((unused))
-int openat(int dirfd, const char *path, int flags, ...)
-{
-	mode_t mode = 0;
-
-	if (flags & O_CREAT) {
-		va_list args;
-
-		va_start(args, flags);
-		mode = va_arg(args, mode_t);
-		va_end(args);
-	}
-
-	return __sysret(sys_openat(dirfd, path, flags, mode));
-}
-
-/*
- * int open(const char *path, int flags[, mode_t mode]);
- */
-
-static __attribute__((unused))
-int sys_open(const char *path, int flags, mode_t mode)
-{
-	return my_syscall4(__NR_openat, AT_FDCWD, path, flags, mode);
-}
-
-static __attribute__((unused))
-int open(const char *path, int flags, ...)
-{
-	mode_t mode = 0;
-
-	if (flags & O_CREAT) {
-		va_list args;
-
-		va_start(args, flags);
-		mode = va_arg(args, mode_t);
-		va_end(args);
-	}
-
-	return __sysret(sys_open(path, flags, mode));
-}
-
 
 /*
  * int pipe2(int pipefd[2], int flags);