io/fts.h

   1 /*
   2  * Copyright (c) 1989, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 4. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      @(#)fts.h       8.3 (Berkeley) 8/14/94
  30  */
  31
  32 #ifndef _FTS_H
  33 #define _FTS_H 1
  34
  35 #include <features.h>
  36 #include <sys/types.h>
  37
  38 /* The fts interface is incompatible with the LFS interface which
  39    transparently uses the 64-bit file access functions.  */
  40 #ifdef __USE_FILE_OFFSET64
  41 # error "<fts.h> cannot be used with -D_FILE_OFFSET_BITS==64"
  42 #endif
  43
  44
  45 typedef struct {
  46         struct _ftsent *fts_cur;        /* current node */
  47         struct _ftsent *fts_child;      /* linked list of children */
  48         struct _ftsent **fts_array;     /* sort array */
  49         dev_t fts_dev;                  /* starting device # */
  50         char *fts_path;                 /* path for this descent */
  51         int fts_rfd;                    /* fd for root */
  52         int fts_pathlen;                /* sizeof(path) */
  53         int fts_nitems;                 /* elements in the sort array */
  54         int (*fts_compar) (const void *, const void *); /* compare fn */
  55
  56 #define FTS_COMFOLLOW   0x0001          /* follow command line symlinks */
  57 #define FTS_LOGICAL     0x0002          /* logical walk */
  58 #define FTS_NOCHDIR     0x0004          /* don't change directories */
  59 #define FTS_NOSTAT      0x0008          /* don't get stat info */
  60 #define FTS_PHYSICAL    0x0010          /* physical walk */
  61 #define FTS_SEEDOT      0x0020          /* return dot and dot-dot */
  62 #define FTS_XDEV        0x0040          /* don't cross devices */
  63 #define FTS_WHITEOUT    0x0080          /* return whiteout information */
  64 #define FTS_OPTIONMASK  0x00ff          /* valid user option mask */
  65
  66 #define FTS_NAMEONLY    0x0100          /* (private) child names only */
  67 #define FTS_STOP        0x0200          /* (private) unrecoverable error */
  68         int fts_options;                /* fts_open options, global flags */
  69 } FTS;
  70
  71 typedef struct _ftsent {
  72         struct _ftsent *fts_cycle;      /* cycle node */
  73         struct _ftsent *fts_parent;     /* parent directory */
  74         struct _ftsent *fts_link;       /* next file in directory */
  75         long fts_number;                /* local numeric value */
  76         void *fts_pointer;              /* local address value */
  77         char *fts_accpath;              /* access path */
  78         char *fts_path;                 /* root path */
  79         int fts_errno;                  /* errno for this node */
  80         int fts_symfd;                  /* fd for symlink */
  81         u_short fts_pathlen;            /* strlen(fts_path) */
  82         u_short fts_namelen;            /* strlen(fts_name) */
  83
  84         ino_t fts_ino;                  /* inode */
  85         dev_t fts_dev;                  /* device */
  86         nlink_t fts_nlink;              /* link count */
  87
  88 #define FTS_ROOTPARENTLEVEL     -1
  89 #define FTS_ROOTLEVEL            0
  90         short fts_level;                /* depth (-1 to N) */
  91
  92 #define FTS_D            1              /* preorder directory */
  93 #define FTS_DC           2              /* directory that causes cycles */
  94 #define FTS_DEFAULT      3              /* none of the above */
  95 #define FTS_DNR          4              /* unreadable directory */
  96 #define FTS_DOT          5              /* dot or dot-dot */
  97 #define FTS_DP           6              /* postorder directory */
  98 #define FTS_ERR          7              /* error; errno is set */
  99 #define FTS_F            8              /* regular file */
 100 #define FTS_INIT         9              /* initialized only */
 101 #define FTS_NS          10              /* stat(2) failed */
 102 #define FTS_NSOK        11              /* no stat(2) requested */
 103 #define FTS_SL          12              /* symbolic link */
 104 #define FTS_SLNONE      13              /* symbolic link without target */
 105 #define FTS_W           14              /* whiteout object */
 106         u_short fts_info;               /* user flags for FTSENT structure */
 107
 108 #define FTS_DONTCHDIR    0x01           /* don't chdir .. to the parent */
 109 #define FTS_SYMFOLLOW    0x02           /* followed a symlink to get here */
 110         u_short fts_flags;              /* private flags for FTSENT structure */
 111
 112 #define FTS_AGAIN        1              /* read node again */
 113 #define FTS_FOLLOW       2              /* follow symbolic link */
 114 #define FTS_NOINSTR      3              /* no instructions */
 115 #define FTS_SKIP         4              /* discard node */
 116         u_short fts_instr;              /* fts_set() instructions */
 117
 118         struct stat *fts_statp;         /* stat(2) information */
 119         char fts_name[1];               /* file name */
 120 } FTSENT;
 121
 122 __BEGIN_DECLS
 123 FTSENT  *fts_children (FTS *, int);
 124 int      fts_close (FTS *);
 125 FTS     *fts_open (char * const *, int,
 126                    int (*)(const FTSENT **, const FTSENT **));
 127 FTSENT  *fts_read (FTS *);
 128 int      fts_set (FTS *, FTSENT *, int) __THROW;
 129 __END_DECLS
 130
 131 #endif /* fts.h */