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
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
#ifndef COPY_H
# define COPY_H
# include <stdbool.h>
# include "hash.h"
/* Control creation of sparse files (files with holes). */
enum Sparse_type
{
SPARSE_UNUSED,
/* Never create holes in DEST. */
SPARSE_NEVER,
/* This is the default. Use a crude (and sometimes inaccurate)
heuristic to determine if SOURCE has holes. If so, try to create
holes in DEST. */
SPARSE_AUTO,
/* For every sufficiently long sequence of bytes in SOURCE, try to
create a corresponding hole in DEST. There is a performance penalty
here because CP has to search for holes in SRC. But if the holes are
big enough, that penalty can be offset by the decrease in the amount
of data written to disk. */
SPARSE_ALWAYS
};
/* This type is used to help mv (via copy.c) distinguish these cases. */
enum Interactive
{
I_ALWAYS_YES = 1,
I_ALWAYS_NO,
I_ASK_USER,
I_UNSPECIFIED
};
/* How to handle symbolic links. */
enum Dereference_symlink
{
DEREF_UNDEFINED = 1,
/* Copy the symbolic link itself. -P */
DEREF_NEVER,
/* If the symbolic is a command line argument, then copy
its referent. Otherwise, copy the symbolic link itself. -H */
DEREF_COMMAND_LINE_ARGUMENTS,
/* Copy the referent of the symbolic link. -L */
DEREF_ALWAYS
};
# define VALID_SPARSE_MODE(Mode) \
((Mode) == SPARSE_NEVER \
|| (Mode) == SPARSE_AUTO \
|| (Mode) == SPARSE_ALWAYS)
/* These options control how files are copied by at least the
following programs: mv (when rename doesn't work), cp, install.
So, if you add a new member, be sure to initialize it in
mv.c, cp.c, and install.c. */
struct cp_options
{
enum backup_type backup_type;
/* If true, copy all files except (directories and, if not dereferencing
them, symbolic links,) as if they were regular files. */
bool copy_as_regular;
/* How to handle symlinks. */
enum Dereference_symlink dereference;
/* If true, remove each existing destination nondirectory before
trying to open it. */
bool unlink_dest_before_opening;
/* If true, first try to open each existing destination nondirectory,
then, if the open fails, unlink and try again.
This option must be set for `cp -f', in case the destination file
exists when the open is attempted. It is irrelevant to `mv' since
any destination is sure to be removed before the open. */
bool unlink_dest_after_failed_open;
/* If true, create hard links instead of copying files.
Create destination directories as usual. */
bool hard_link;
/* This value is used to determine whether to prompt before removing
each existing destination file. It works differently depending on
whether move_mode is set. See code/comments in copy.c. */
enum Interactive interactive;
/* If true, rather than copying, first attempt to use rename.
If that fails, then resort to copying. */
bool move_mode;
/* This process's effective user ID. */
uid_t myeuid;
/* If true, when copying recursively, skip any subdirectories that are
on different file systems from the one we started on. */
bool one_file_system;
/* If true, attempt to give the copies the original files' permissions,
owner, group, and timestamps. */
bool preserve_ownership;
bool preserve_mode;
bool preserve_timestamps;
/* Enabled for mv, and for cp by the --preserve=links option.
If true, attempt to preserve in the destination files any
logical hard links between the source files. If used with cp's
--no-dereference option, and copying two hard-linked files,
the two corresponding destination files will also be hard linked.
If used with cp's --dereference (-L) option, then, as that option implies,
hard links are *not* preserved. However, when copying a file F and
a symlink S to F, the resulting S and F in the destination directory
will be hard links to the same file (a copy of F). */
bool preserve_links;
/* If true and any of the above (for preserve) file attributes cannot
be applied to a destination file, treat it as a failure and return
nonzero immediately. E.g. cp -p requires this be nonzero, mv requires
it be zero. */
bool require_preserve;
/* If true, copy directories recursively and copy special files
as themselves rather than copying their contents. */
bool recursive;
/* If true, set file mode to value of MODE. Otherwise,
set it based on current umask modified by UMASK_KILL. */
bool set_mode;
/* Set the mode of the destination file to exactly this value
if SET_MODE is nonzero. */
mode_t mode;
/* Control creation of sparse files. */
enum Sparse_type sparse_mode;
/* If true, create symbolic links instead of copying files.
Create destination directories as usual. */
bool symbolic_link;
/* The bits to preserve in created files' modes. */
mode_t umask_kill;
/* If true, do not copy a nondirectory that has an existing destination
with the same or newer modification time. */
bool update;
/* If true, display the names of the files before copying them. */
bool verbose;
/* If true, stdin is a tty. */
bool stdin_tty;
/* This is a set of destination name/inode/dev triples. Each such triple
represents a file we have created corresponding to a source file name
that was specified on the command line. Use it to avoid clobbering
source files in commands like this:
rm -rf a b c; mkdir a b c; touch a/f b/f; mv a/f b/f c
For now, it protects only regular files when copying (i.e. not renaming).
When renaming, it protects all non-directories.
Use dest_info_init to initialize it, or set it to NULL to disable
this feature. */
Hash_table *dest_info;
/* FIXME */
Hash_table *src_info;
};
# define XSTAT(X, Src_path, Src_sb) \
((X)->dereference == DEREF_NEVER \
? lstat (Src_path, Src_sb) \
: stat (Src_path, Src_sb))
/* Arrange to make lstat calls go through the wrapper function
on systems with an lstat function that does not dereference symlinks
that are specified with a trailing slash. */
# if ! LSTAT_FOLLOWS_SLASHED_SYMLINK
int rpl_lstat (const char *, struct stat *);
# undef lstat
# define lstat rpl_lstat
# endif
/* Arrange to make rename calls go through the wrapper function
on systems with a rename function that fails for a source path
specified with a trailing slash. */
# if RENAME_TRAILING_SLASH_BUG
int rpl_rename (const char *, const char *);
# undef rename
# define rename rpl_rename
# endif
bool
copy (const char *src_path, const char *dst_path,
bool nonexistent_dst, const struct cp_options *options,
bool *copy_into_self, bool *rename_succeeded);
void
dest_info_init (struct cp_options *);
void
src_info_init (struct cp_options *);
#endif
|
