inotify-nosys.h

Go to the documentation of this file.

/*
 * This header is used if <sys/inotify.h> cannot be found.
 *
 * Inode based directory notification for Linux
 *
 * Copyright (C) 2005 John McCutchan
 */

#ifndef _LINUX_INOTIFY_H
#define _LINUX_INOTIFY_H

#include <stdint.h>
#include <sys/syscall.h>
#include <unistd.h>

/*
 * struct inotify_event - structure read from the inotify device for each event
 *
 * When you are watching a directory, you will receive the filename for events
 * such as IN_CREATE, IN_DELETE, IN_OPEN, IN_CLOSE, ..., relative to the wd.
 */
struct inotify_event {
        int             wd;             /* watch descriptor */
        uint32_t                mask;           /* watch mask */
        uint32_t                cookie;         /* cookie to synchronize two events */
        uint32_t                len;            /* length (including nulls) of name */
        char            name __flexarr; /* stub for possible 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)

#if defined (__alpha__)
# define __NR_inotify_init 444
# define __NR_inotify_add_watch 445
# define __NR_inotify_rm_watch 446

#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 (__frv__)
# define __NR_inotify_init 291
# define __NR_inotify_add_watch 292
# define __NR_inotify_rm_watch 293

#elif defined(__i386__)
# define __NR_inotify_init 291
# define __NR_inotify_add_watch 292
# define __NR_inotify_rm_watch 293

#elif defined (__ia64__)
# define __NR_inotify_init 1277
# define __NR_inotify_add_watch 1278
# define __NR_inotify_rm_watch 1279

#elif defined (__mips__)
# if _MIPS_SIM == _MIPS_SIM_ABI32
#  define __NR_inotify_init (__NR_Linux + 284)
#  define __NR_inotify_add_watch (__NR_Linux + 285)
#  define __NR_inotify_rm_watch (__NR_Linux + 286)
# endif
# if _MIPS_SIM == _MIPS_SIM_ABI64
#  define __NR_inotify_init (__NR_Linux + 243)
#  define __NR_inotify_add_watch (__NR_Linux + 243)
#  define __NR_inotify_rm_watch (__NR_Linux + 243)
# endif
# if _MIPS_SIM == _MIPS_SIM_NABI32
#  define __NR_inotify_init (__NR_Linux + 247)
#  define __NR_inotify_add_watch (__NR_Linux + 248)
#  define __NR_inotify_rm_watch (__NR_Linux + 249)
# endif

#elif defined(__parisc__)
# define __NR_inotify_init (__NR_Linux + 269)
# define __NR_inotify_add_watch (__NR_Linux + 270)
# define __NR_inotify_rm_watch (__NR_Linux + 271)

#elif defined(__powerpc__) || defined(__powerpc64__)
# define __NR_inotify_init 275
# define __NR_inotify_add_watch 276
# define __NR_inotify_rm_watch 277

#elif defined (__s390__)
# define __NR_inotify_init 284
# define __NR_inotify_add_watch 285
# define __NR_inotify_rm_watch 286

#elif defined (__sh__)
# define __NR_inotify_init 290
# define __NR_inotify_add_watch 291
# define __NR_inotify_rm_watch 292

#elif defined (__sh64__)
# define __NR_inotify_init 318
# define __NR_inotify_add_watch 319
# define __NR_inotify_rm_watch 320

#elif defined (__sparc__) || defined (__sparc64__)
# define __NR_inotify_init 151
# define __NR_inotify_add_watch 152
# define __NR_inotify_rm_watch 156

#elif defined(__x86_64__)
# define __NR_inotify_init 253
# define __NR_inotify_add_watch 254
# define __NR_inotify_rm_watch 255

#else
# error "Unsupported architecture!"
#endif

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  /* _LINUX_INOTIFY_H */

---