2 Copyright (C) 2001-2003, 2006-2007, 2009-2013 Free Software Foundation, Inc.
3 Written by Bruno Haible <haible@clisp.cons.org>, 2001.
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include "copy-file.h"
31 #if HAVE_UTIME || HAVE_UTIMES
35 # include <sys/utime.h>
40 #include "ignore-value.h"
41 #include "safe-read.h"
42 #include "full-write.h"
44 #include "binary-io.h"
49 #define _(str) gettext (str)
51 /* The results of open() in this file are not used with fchdir,
52 therefore save some unnecessary work in fchdir.c. */
56 enum { IO_SIZE = 32 * 1024 };
59 qcopy_file_preserving (const char *src_filename, const char *dest_filename)
66 char *buf = xmalloc (IO_SIZE);
68 src_fd = open (src_filename, O_RDONLY | O_BINARY);
71 err = GL_COPY_ERR_OPEN_READ;
74 if (fstat (src_fd, &statbuf) < 0)
76 err = GL_COPY_ERR_OPEN_READ;
80 mode = statbuf.st_mode & 07777;
82 dest_fd = open (dest_filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0600);
85 err = GL_COPY_ERR_OPEN_BACKUP_WRITE;
89 /* Copy the file contents. */
92 size_t n_read = safe_read (src_fd, buf, IO_SIZE);
93 if (n_read == SAFE_READ_ERROR)
95 err = GL_COPY_ERR_READ;
101 if (full_write (dest_fd, buf, n_read) < n_read)
103 err = GL_COPY_ERR_WRITE;
111 if (close (dest_fd) < 0)
113 err = GL_COPY_ERR_WRITE;
116 if (close (src_fd) < 0)
118 err = GL_COPY_ERR_AFTER_READ;
123 /* Preserve the access and modification times. */
128 ut.actime = statbuf.st_atime;
129 ut.modtime = statbuf.st_mtime;
130 utime (dest_filename, &ut);
134 struct timeval ut[2];
136 ut[0].tv_sec = statbuf.st_atime; ut[0].tv_usec = 0;
137 ut[1].tv_sec = statbuf.st_mtime; ut[1].tv_usec = 0;
138 utimes (dest_filename, &ut);
143 /* Preserve the owner and group. */
144 ignore_value (chown (dest_filename, statbuf.st_uid, statbuf.st_gid));
147 /* Preserve the access permissions. */
149 switch (qcopy_acl (src_filename, src_fd, dest_filename, dest_fd, mode))
152 err = GL_COPY_ERR_GET_ACL;
155 err = GL_COPY_ERR_SET_ACL;
159 chmod (dest_filename, mode);
163 if (close (dest_fd) < 0)
165 err = GL_COPY_ERR_WRITE;
168 if (close (src_fd) < 0)
170 err = GL_COPY_ERR_AFTER_READ;
186 copy_file_preserving (const char *src_filename, const char *dest_filename)
188 switch (qcopy_file_preserving (src_filename, dest_filename))
193 case GL_COPY_ERR_OPEN_READ:
194 error (EXIT_FAILURE, errno, _("error while opening %s for reading"),
195 quote (src_filename));
197 case GL_COPY_ERR_OPEN_BACKUP_WRITE:
198 error (EXIT_FAILURE, errno, _("cannot open backup file %s for writing"),
199 quote (dest_filename));
201 case GL_COPY_ERR_READ:
202 error (EXIT_FAILURE, errno, _("error reading %s"),
203 quote (src_filename));
205 case GL_COPY_ERR_WRITE:
206 error (EXIT_FAILURE, errno, _("error writing %s"),
207 quote (dest_filename));
209 case GL_COPY_ERR_AFTER_READ:
210 error (EXIT_FAILURE, errno, _("error after reading %s"),
211 quote (src_filename));
213 case GL_COPY_ERR_GET_ACL:
214 error (EXIT_FAILURE, errno, "%s", quote (src_filename));
216 case GL_COPY_ERR_SET_ACL:
217 error (EXIT_FAILURE, errno, _("preserving permissions for %s"),
218 quote (dest_filename));