move rules parsing into daemon

The rules files are parsed only once at daemon startup. Every udev
event process will be fork()'d from udevd without exec()'ing the udev
binary. The in-memory rules will be inherited from the daemon itself.

If inotify is available, udevd will reload all rules if any change in
/etc/udev/rules.d/ happens. Otherwise -HUP or "udevcontrol reload_rules"
can be used.

Signed-off-by: Kay Sievers <kay.sievers@suse.de>

1 files changed, 67 insertions, 2 deletions

diff --git a/udev_libc_wrapper.h b/udev_libc_wrapper.h
index 6f8c8f24..9a8b26a2 100644
--- a/udev_libc_wrapper.h
+++ b/udev_libc_wrapper.h
@@ -24,7 +24,72 @@
 
 #include <string.h>
 #include <unistd.h>
-#include <linux/types.h>
+#include <stdint.h>
+
+/* needed until Inotify! syscalls reach glibc */
+#include <sys/syscall.h>
+#ifndef __NR_inotify_init
+#if defined(__i386__)
+# define __NR_inotify_init	291
+# define __NR_inotify_add_watch	292
+# define __NR_inotify_rm_watch	293
+#elif defined(__x86_64__)
+# define __NR_inotify_init	253
+# define __NR_inotify_add_watch	254
+# define __NR_inotify_rm_watch	255
+#elif defined(__powerpc__) || defined(__powerpc64__)
+# define __NR_inotify_init	275
+# define __NR_inotify_add_watch	276
+# define __NR_inotify_rm_watch	277
+#elif defined (__ia64__)
+# define __NR_inotify_init	1277
+# define __NR_inotify_add_watch	1278
+# define __NR_inotify_rm_watch	1279
+#elif defined (__s390__)
+# define __NR_inotify_init	284
+# define __NR_inotify_add_watch	285
+# define __NR_inotify_rm_watch	286
+#elif defined (__alpha__)
+# define __NR_inotify_init	444
+# define __NR_inotify_add_watch	445
+# define __NR_inotify_rm_watch	446
+#elif defined (__sparc__) || defined (__sparc64__)
+# define __NR_inotify_init	151
+# define __NR_inotify_add_watch	152
+# define __NR_inotify_rm_watch	156
+#elif defined (__arm__)
+# define __NR_inotify_init	316
+# define __NR_inotify_add_watch	317
+# define __NR_inotify_rm_watch	318
+#elif defined (__sh__)
+# define __NR_inotify_init	290
+# define __NR_inotify_add_watch	291
+# define __NR_inotify_rm_watch	292
+#else
+# error "Unsupported architecture!"
+#endif
+#endif /* __NR_inotify_init */
+
+/* needed until /usr/include/sys/inotify.h is working */
+#ifdef __KLIBC__
+#include <sys/inotify.h>
+#else
+static inline int inotify_init(void)
+{
+	return syscall(__NR_inotify_init);
+}
+
+static inline int inotify_add_watch(int fd, const char *name, uint32_t mask)
+{
+	return syscall(__NR_inotify_add_watch, fd, name, mask);
+}
+#define IN_CREATE		0x00000100	/* Subfile was created */
+#define IN_MOVED_FROM		0x00000040	/* File was moved from X */
+#define IN_MOVED_TO		0x00000080	/* File was moved to Y */
+#define IN_DELETE		0x00000200	/* Subfile was deleted */
+#define IN_CLOSE_WRITE		0x00000008	/* Writtable file was closed */
+#define IN_MOVE			(IN_MOVED_FROM | IN_MOVED_TO) /* moves */
+#endif /* __KLIBC__ */
 
 /* needed for our signal handlers to work */
 #undef asmlinkage
@@ -32,7 +97,7 @@
 #define asmlinkage	__attribute__((regparm(0)))
 #else
 #define asmlinkage
-#endif
+#endif /* __i386__ */
 
 /* headers are broken on some lazy platforms */
 #ifndef __FD_SET