summary refs log tree commit diff
path: root/io/ftw.h
blob: 640118078fb6ec32c42f06a8d9faadfcacfbad93 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
/* Copyright (C) 1992-2019 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

/*
 *	X/Open Portability Guide 4.2: ftw.h
 */

#ifndef _FTW_H
#define	_FTW_H	1

#include <features.h>

#include <sys/types.h>
#include <sys/stat.h>


__BEGIN_DECLS

/* Values for the FLAG argument to the user function passed to `ftw'
   and 'nftw'.  */
enum
{
  FTW_F,		/* Regular file.  */
#define FTW_F	 FTW_F
  FTW_D,		/* Directory.  */
#define FTW_D	 FTW_D
  FTW_DNR,		/* Unreadable directory.  */
#define FTW_DNR	 FTW_DNR
  FTW_NS,		/* Unstatable file.  */
#define FTW_NS	 FTW_NS

#if defined __USE_MISC || defined __USE_XOPEN_EXTENDED

  FTW_SL,		/* Symbolic link.  */
# define FTW_SL	 FTW_SL
#endif

#ifdef __USE_XOPEN_EXTENDED
/* These flags are only passed from the `nftw' function.  */
  FTW_DP,		/* Directory, all subdirs have been visited. */
# define FTW_DP	 FTW_DP
  FTW_SLN		/* Symbolic link naming non-existing file.  */
# define FTW_SLN FTW_SLN

#endif	/* extended X/Open */
};


#ifdef __USE_XOPEN_EXTENDED
/* Flags for fourth argument of `nftw'.  */
enum
{
  FTW_PHYS = 1,		/* Perform physical walk, ignore symlinks.  */
# define FTW_PHYS	FTW_PHYS
  FTW_MOUNT = 2,	/* Report only files on same file system as the
			   argument.  */
# define FTW_MOUNT	FTW_MOUNT
  FTW_CHDIR = 4,	/* Change to current directory while processing it.  */
# define FTW_CHDIR	FTW_CHDIR
  FTW_DEPTH = 8		/* Report files in directory before directory itself.*/
# define FTW_DEPTH	FTW_DEPTH
# ifdef __USE_GNU
  ,
  FTW_ACTIONRETVAL = 16	/* Assume callback to return FTW_* values instead of
			   zero to continue and non-zero to terminate.  */
#  define FTW_ACTIONRETVAL FTW_ACTIONRETVAL
# endif
};

#ifdef __USE_GNU
/* Return values from callback functions.  */
enum
{
  FTW_CONTINUE = 0,	/* Continue with next sibling or for FTW_D with the
			   first child.  */
# define FTW_CONTINUE	FTW_CONTINUE
  FTW_STOP = 1,		/* Return from `ftw' or `nftw' with FTW_STOP as return
			   value.  */
# define FTW_STOP	FTW_STOP
  FTW_SKIP_SUBTREE = 2,	/* Only meaningful for FTW_D: Don't walk through the
			   subtree, instead just continue with its next
			   sibling. */
# define FTW_SKIP_SUBTREE FTW_SKIP_SUBTREE
  FTW_SKIP_SIBLINGS = 3,/* Continue with FTW_DP callback for current directory
			    (if FTW_DEPTH) and then its siblings.  */
# define FTW_SKIP_SIBLINGS FTW_SKIP_SIBLINGS
};
#endif

/* Structure used for fourth argument to callback function for `nftw'.  */
struct FTW
  {
    int base;
    int level;
  };
#endif	/* extended X/Open */


/* Convenient types for callback functions.  */
typedef int (*__ftw_func_t) (const char *__filename,
			     const struct stat *__status, int __flag);
#ifdef __USE_LARGEFILE64
typedef int (*__ftw64_func_t) (const char *__filename,
			       const struct stat64 *__status, int __flag);
#endif
#ifdef __USE_XOPEN_EXTENDED
typedef int (*__nftw_func_t) (const char *__filename,
			      const struct stat *__status, int __flag,
			      struct FTW *__info);
# ifdef __USE_LARGEFILE64
typedef int (*__nftw64_func_t) (const char *__filename,
				const struct stat64 *__status,
				int __flag, struct FTW *__info);
# endif
#endif

/* Call a function on every element in a directory tree.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
#ifndef __USE_FILE_OFFSET64
extern int ftw (const char *__dir, __ftw_func_t __func, int __descriptors)
     __nonnull ((1, 2));
#else
# ifdef __REDIRECT
extern int __REDIRECT (ftw, (const char *__dir, __ftw_func_t __func,
			     int __descriptors), ftw64) __nonnull ((1, 2));
# else
#  define ftw ftw64
# endif
#endif
#ifdef __USE_LARGEFILE64
extern int ftw64 (const char *__dir, __ftw64_func_t __func,
		  int __descriptors) __nonnull ((1, 2));
#endif

#ifdef __USE_XOPEN_EXTENDED
/* Call a function on every element in a directory tree.  FLAG allows
   to specify the behaviour more detailed.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
# ifndef __USE_FILE_OFFSET64
extern int nftw (const char *__dir, __nftw_func_t __func, int __descriptors,
		 int __flag) __nonnull ((1, 2));
# else
#  ifdef __REDIRECT
extern int __REDIRECT (nftw, (const char *__dir, __nftw_func_t __func,
			      int __descriptors, int __flag), nftw64)
     __nonnull ((1, 2));
#  else
#   define nftw nftw64
#  endif
# endif
# ifdef __USE_LARGEFILE64
extern int nftw64 (const char *__dir, __nftw64_func_t __func,
		   int __descriptors, int __flag) __nonnull ((1, 2));
# endif
#endif

__END_DECLS

#endif	/* ftw.h */