Add libroot

libroot.h

@@ -0,0 +1 @@
+#include <libroot/libroot.h>

libroot/libroot.h

@@ -0,0 +1,70 @@
+#include <sys/syslimits.h>
+
+__BEGIN_DECLS
+
+_Pragma("GCC visibility push(hidden)")
+
+const char *_Nonnull libroot_dyn_get_root_prefix(void);
+const char *_Nonnull libroot_dyn_get_jbroot_prefix(void);
+const char *_Nonnull libroot_dyn_get_boot_uuid(void);
+char *_Nullable libroot_dyn_rootfspath(const char *_Nullable path, char *_Nullable resolvedPath);
+char *_Nullable libroot_dyn_jbrootpath(const char *_Nullable path, char *_Nullable resolvedPath);
+
+_Pragma("GCC visibility pop")
+
+__END_DECLS
+
+#define __CONVERT_PATH_CSTRING(converter, path) ({ \
+	static char outPath[PATH_MAX]; \
+	converter(path, outPath); \
+})
+
+#define JBROOT_PATH_CSTRING(path) __CONVERT_PATH_CSTRING(libroot_dyn_jbrootpath, path)
+#define ROOTFS_PATH_CSTRING(path) __CONVERT_PATH_CSTRING(libroot_dyn_rootfspath, path)
+
+#if __has_attribute(overloadable)
+__attribute__((__overloadable__))
+static inline const char *_Nullable __libroot_convert_path(char *_Nullable (*_Nonnull converter)(const char *_Nonnull, char *_Nullable), const char *_Nullable path, char *_Nonnull buf) {
+	return converter(path, buf);
+}
+#endif /* __has_attribute(overloadable) */
+
+#ifdef __OBJC__
+
+#import <Foundation/Foundation.h>
+
+#define __CONVERT_PATH_NSSTRING(converter, path) ({ \
+	char tmpBuf[PATH_MAX]; \
+	const char *converted = converter(path.fileSystemRepresentation, tmpBuf); \
+	converted ? [NSString stringWithUTF8String:converted] : nil; \
+})
+
+#define JBROOT_PATH_NSSTRING(path) __CONVERT_PATH_NSSTRING(libroot_dyn_jbrootpath, path)
+#define ROOTFS_PATH_NSSTRING(path) __CONVERT_PATH_NSSTRING(libroot_dyn_rootfspath, path)
+
+#if __has_attribute(overloadable)
+__attribute__((__overloadable__))
+static inline NSString *_Nullable __libroot_convert_path(char *_Nullable (*_Nonnull converter)(const char *_Nonnull, char *_Nullable), NSString *_Nullable path, void *_Nullable const __unused buf) {
+	return __CONVERT_PATH_NSSTRING(converter, path);
+}
+#endif /* __has_attribute(overloadable) */
+
+#endif /* __OBJC__ */
+
+#if __has_attribute(overloadable)
+
+#define __BUFFER_FOR_CHAR_P(x) \
+	__builtin_choose_expr(										\
+		__builtin_types_compatible_p(__typeof__(*(x)), char),	\
+		({ static char buf[PATH_MAX]; buf; }),					\
+		NULL													\
+	)
+
+#	define JBROOT_PATH(path) __libroot_convert_path(libroot_dyn_jbrootpath, (path), __BUFFER_FOR_CHAR_P(path))
+#	define ROOTFS_PATH(path) __libroot_convert_path(libroot_dyn_rootfspath, (path), __BUFFER_FOR_CHAR_P(path))
+#else
+#	define JBROOT_PATH(path) _Pragma("GCC error \"JBROOT_PATH is not supported with this compiler, use JBROOT_PATH_CSTRING or JBROOT_PATH_NSSTRING\"") path
+#	define ROOTFS_PATH(path) _Pragma("GCC error \"ROOTFS_PATH is not supported with this compiler, use ROOTFS_PATH_CSTRING or ROOTFS_PATH_NSSTRING\"") path
+#endif /* __has_attribute(overloadable) */
+
+#define JBRAND libroot_dyn_get_boot_uuid()

libroot/module.modulemap

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+module libroot {
+  umbrella header "libroot.h"
+
+  export *
+}