support for glibc 2.3
Marco d'Itri
md at Linux.IT
Sun Sep 3 14:56:48 BST 2006
This very rough patch allows building upstart (libnih actually) on
systems which lack a libc with inotify support, like Debian/unstable.
It also provides stubs for architectures having no inotify support at all.
--
ciao,
Marco
-------------- next part --------------
=== added file 'nih/inotify-support.h'
--- nih/inotify-support.h 1970-01-01 00:00:00 +0000
+++ nih/inotify-support.h 2006-09-03 13:34:56 +0000
@@ -0,0 +1,184 @@
+/*
+ * udev_sysdeps.h - wrapping of libc features and kernel defines
+ *
+ * Copyright (C) 2005-2006 Kay Sievers <kay.sievers at vrfy.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#ifndef _UDEV_SYSDEPS_H_
+#define _UDEV_SYSDEPS_H_
+
+#include <string.h>
+#include <unistd.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 __NR_SYSCALL_BASE+316
+# define __NR_inotify_add_watch __NR_SYSCALL_BASE+317
+# define __NR_inotify_rm_watch __NR_SYSCALL_BASE+318
+#elif defined (__sh__)
+# define __NR_inotify_init 290
+# define __NR_inotify_add_watch 291
+# define __NR_inotify_rm_watch 292
+#elif defined (__hppa__)
+# define __NR_inotify_init 269
+# define __NR_inotify_add_watch 270
+# define __NR_inotify_rm_watch 271
+#elif defined (__mips__)
+# include <sgidefs.h>
+# if _MIPS_SIM == _MIPS_SIM_ABI32
+# define __NR_Linux 4000
+# define __NR_inotify_init (__NR_Linux + 284)
+# define __NR_inotify_add_watch (__NR_Linux + 285)
+# define __NR_inotify_rm_watch (__NR_Linux + 286)
+# elif _MIPS_SIM == _MIPS_SIM_ABI64
+# define __NR_Linux 5000
+# define __NR_inotify_init (__NR_Linux + 243)
+# define __NR_inotify_add_watch (__NR_Linux + 244)
+# define __NR_inotify_rm_watch (__NR_Linux + 245)
+# elif _MIPS_SIM == _MIPS_SIM_NABI32
+# define __NR_Linux 6000
+# define __NR_inotify_init (__NR_Linux + 247)
+# define __NR_inotify_add_watch (__NR_Linux + 248)
+# define __NR_inotify_rm_watch (__NR_Linux + 249)
+# endif
+#else
+# warning "inotify unsupported on this architecture!"
+#endif
+#endif /* __NR_inotify_init */
+
+/* dummy if we don't have the syscalls defined */
+#ifndef __NR_inotify_init
+static inline int inotify_init(void)
+{
+ return -1;
+}
+
+static inline int inotify_add_watch(int fd, const char *name, uint32_t mask)
+{
+ return -1;
+}
+
+static inline int inotify_rm_watch(int fd, uint32_t wd)
+{
+ return -1;
+}
+#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);
+}
+
+static inline int inotify_rm_watch(int fd, uint32_t wd)
+{
+ return syscall(__NR_inotify_rm_watch, fd, wd);
+}
+#endif /* __NR_inotify_init */
+
+#ifndef IN_CREATE
+#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 /* IN_CREATE */
+
+struct inotify_event {
+ int wd;
+ uint32_t mask;
+ uint32_t cookie;
+ uint32_t len;
+ char name[];
+};
+
+/* the following are legal, implemented events that user-space can watch for */
+#define IN_ACCESS 0x00000001 /* File was accessed */
+#define IN_MODIFY 0x00000002 /* File was modified */
+#define IN_ATTRIB 0x00000004 /* Metadata changed */
+#define IN_CLOSE_WRITE 0x00000008 /* Writtable file was closed */
+#define IN_CLOSE_NOWRITE 0x00000010 /* Unwrittable file closed */
+#define IN_OPEN 0x00000020 /* File was opened */
+#define IN_MOVED_FROM 0x00000040 /* File was moved from X */
+#define IN_MOVED_TO 0x00000080 /* File was moved to Y */
+#define IN_CREATE 0x00000100 /* Subfile was created */
+#define IN_DELETE 0x00000200 /* Subfile was deleted */
+#define IN_DELETE_SELF 0x00000400 /* Self was deleted */
+#define IN_MOVE_SELF 0x00000800 /* Self was moved */
+
+/* the following are legal events. they are sent as needed to any watch */
+#define IN_UNMOUNT 0x00002000 /* Backing fs was unmounted */
+#define IN_Q_OVERFLOW 0x00004000 /* Event queued overflowed */
+#define IN_IGNORED 0x00008000 /* File was ignored */
+
+/* helper events */
+#define IN_CLOSE (IN_CLOSE_WRITE | IN_CLOSE_NOWRITE) /* close */
+#define IN_MOVE (IN_MOVED_FROM | IN_MOVED_TO) /* moves */
+
+/* special flags */
+#define IN_ONLYDIR 0x01000000 /* only watch the path if it is a directory */
+#define IN_DONT_FOLLOW 0x02000000 /* don't follow a sym link */
+#define IN_MASK_ADD 0x20000000 /* add to the mask of an already existing watch */
+#define IN_ISDIR 0x40000000 /* event occurred against dir */
+#define IN_ONESHOT 0x80000000 /* only send event once */
+
+/*
+ * All of the events - we build the list by hand so that we can add flags in
+ * the future and not break backward compatibility. Apps will get only the
+ * events that they originally wanted. Be sure to add new events here!
+ */
+#define IN_ALL_EVENTS (IN_ACCESS | IN_MODIFY | IN_ATTRIB | IN_CLOSE_WRITE | \
+ IN_CLOSE_NOWRITE | IN_OPEN | IN_MOVED_FROM | \
+ IN_MOVED_TO | IN_DELETE | IN_CREATE | IN_DELETE_SELF | \
+ IN_MOVE_SELF)
+
+#endif
=== modified file 'nih/file.c'
--- nih/file.c 2006-08-24 00:31:01 +0000
+++ nih/file.c 2006-09-03 13:25:12 +0000
@@ -27,7 +27,11 @@
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
-#include <sys/inotify.h>
+#ifdef HAVE_INOTIFY_H
+# include <sys/inotify.h>
+#else
+# include "inotify-support.h"
+#endif
#include <fcntl.h>
#include <errno.h>
=== modified file 'nih/file.h'
--- nih/file.h 2006-08-22 10:23:07 +0000
+++ nih/file.h 2006-09-03 13:25:07 +0000
@@ -20,7 +20,11 @@
#ifndef NIH_FILE_H
#define NIH_FILE_H
-#include <sys/inotify.h>
+#ifdef HAVE_INOTIFY_H
+# include <sys/inotify.h>
+#else
+# include "inotify-support.h"
+#endif
#include <nih/macros.h>
#include <nih/list.h>
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