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
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
/* rename.c -- rename a file, preserving symlinks.
Copyright (C) 1999-2023 Free Software Foundation, Inc.
This file is part of GNU Binutils.
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; either version 3 of the License, or
(at your option) any later version.
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., 51 Franklin Street - Fifth Floor, Boston, MA
02110-1301, USA. */
#include "sysdep.h"
#include "bfd.h"
#include "bucomm.h"
#if defined HAVE_UTIMES
#include <sys/time.h>
#elif defined HAVE_GOOD_UTIME_H
#include <utime.h>
#endif
/* The number of bytes to copy at once. */
#define COPY_BUF 8192
/* Copy file FROMFD to file TO, performing no translations.
Return 0 if ok, -1 if error. */
static int
simple_copy (int fromfd, const char *to,
struct stat *target_stat ATTRIBUTE_UNUSED)
{
int tofd, nread;
int saved;
char buf[COPY_BUF];
if (fromfd < 0
|| lseek (fromfd, 0, SEEK_SET) != 0)
return -1;
tofd = open (to, O_WRONLY | O_TRUNC | O_BINARY);
if (tofd < 0)
{
saved = errno;
close (fromfd);
errno = saved;
return -1;
}
while ((nread = read (fromfd, buf, sizeof buf)) > 0)
{
if (write (tofd, buf, nread) != nread)
{
saved = errno;
close (fromfd);
close (tofd);
errno = saved;
return -1;
}
}
saved = errno;
#if !defined (_WIN32) || defined (__CYGWIN32__)
/* Writing to a setuid/setgid file may clear S_ISUID and S_ISGID.
Try to restore them, ignoring failure. */
if (target_stat != NULL)
fchmod (tofd, target_stat->st_mode);
#endif
close (fromfd);
close (tofd);
if (nread < 0)
{
errno = saved;
return -1;
}
return 0;
}
/* The following defines and inline functions are copied from gnulib.
FIXME: Use a gnulib import and stat-time.h instead. */
#if defined HAVE_STRUCT_STAT_ST_ATIM_TV_NSEC
# if defined TYPEOF_STRUCT_STAT_ST_ATIM_IS_STRUCT_TIMESPEC
# define STAT_TIMESPEC(st, st_xtim) ((st)->st_xtim)
# else
# define STAT_TIMESPEC_NS(st, st_xtim) ((st)->st_xtim.tv_nsec)
# endif
#elif defined HAVE_STRUCT_STAT_ST_ATIMESPEC_TV_NSEC
# define STAT_TIMESPEC(st, st_xtim) ((st)->st_xtim##espec)
#elif defined HAVE_STRUCT_STAT_ST_ATIMENSEC
# define STAT_TIMESPEC_NS(st, st_xtim) ((st)->st_xtim##ensec)
#elif defined HAVE_STRUCT_STAT_ST_ATIM_ST__TIM_TV_NSEC
# define STAT_TIMESPEC_NS(st, st_xtim) ((st)->st_xtim.st__tim.tv_nsec)
#endif
static inline long int get_stat_atime_ns (struct stat const *) ATTRIBUTE_UNUSED;
static inline long int get_stat_mtime_ns (struct stat const *) ATTRIBUTE_UNUSED;
/* Return the nanosecond component of *ST's access time. */
static inline long int
get_stat_atime_ns (struct stat const *st ATTRIBUTE_UNUSED)
{
# if defined STAT_TIMESPEC
return STAT_TIMESPEC (st, st_atim).tv_nsec;
# elif defined STAT_TIMESPEC_NS
return STAT_TIMESPEC_NS (st, st_atim);
# else
return 0;
# endif
}
/* Return the nanosecond component of *ST's data modification time. */
static inline long int
get_stat_mtime_ns (struct stat const *st ATTRIBUTE_UNUSED)
{
# if defined STAT_TIMESPEC
return STAT_TIMESPEC (st, st_mtim).tv_nsec;
# elif defined STAT_TIMESPEC_NS
return STAT_TIMESPEC_NS (st, st_mtim);
# else
return 0;
# endif
}
#if defined HAVE_UTIMENSAT
/* Return *ST's access time. */
static inline struct timespec
get_stat_atime (struct stat const *st)
{
#ifdef STAT_TIMESPEC
return STAT_TIMESPEC (st, st_atim);
#else
struct timespec t;
t.tv_sec = st->st_atime;
t.tv_nsec = get_stat_atime_ns (st);
return t;
#endif
}
/* Return *ST's data modification time. */
static inline struct timespec
get_stat_mtime (struct stat const *st)
{
#ifdef STAT_TIMESPEC
return STAT_TIMESPEC (st, st_mtim);
#else
struct timespec t;
t.tv_sec = st->st_mtime;
t.tv_nsec = get_stat_mtime_ns (st);
return t;
#endif
}
#endif
/* End FIXME. */
/* Set the times of the file DESTINATION to be the same as those in
STATBUF. */
void
set_times (const char *destination, const struct stat *statbuf)
{
int result;
#if defined HAVE_UTIMENSAT
struct timespec times[2];
times[0] = get_stat_atime (statbuf);
times[1] = get_stat_mtime (statbuf);
result = utimensat (AT_FDCWD, destination, times, 0);
#elif defined HAVE_UTIMES
struct timeval tv[2];
tv[0].tv_sec = statbuf->st_atime;
tv[0].tv_usec = get_stat_atime_ns (statbuf) / 1000;
tv[1].tv_sec = statbuf->st_mtime;
tv[1].tv_usec = get_stat_mtime_ns (statbuf) / 1000;
result = utimes (destination, tv);
#elif defined HAVE_GOOD_UTIME_H
struct utimbuf tb;
tb.actime = statbuf->st_atime;
tb.modtime = statbuf->st_mtime;
result = utime (destination, &tb);
#else
long tb[2];
tb[0] = statbuf->st_atime;
tb[1] = statbuf->st_mtime;
result = utime (destination, tb);
#endif
if (result != 0)
non_fatal (_("%s: cannot set time: %s"), destination, strerror (errno));
}
/* Copy FROM to TO. TARGET_STAT has the file status that, if non-NULL,
is used to fix up timestamps. Return 0 if ok, -1 if error.
At one time this function renamed files, but file permissions are
tricky to update given the number of different schemes used by
various systems. So now we just copy. */
int
smart_rename (const char *from, const char *to, int fromfd,
struct stat *target_stat, bool preserve_dates)
{
int ret = 0;
if (to != from)
{
ret = simple_copy (fromfd, to, target_stat);
if (ret != 0)
non_fatal (_("unable to copy file '%s'; reason: %s"),
to, strerror (errno));
unlink (from);
}
if (preserve_dates)
set_times (to, target_stat);
return ret;
}
|
