int
copy_acl (const char *src_name, int source_desc, const char *dst_name,
int dest_desc, mode_t mode)
{
int ret = qcopy_acl (src_name, source_desc, dst_name, dest_desc, mode);
switch (ret)
{
case -2:
error (0, errno, "%s", quote (src_name));
return -1;
case -1:
error (0, errno, _("preserving permissions for %s"), quote (dst_name));
return -1;
default:
return 0;
}
}
int
qcopy_file_preserving (const char *src_filename, const char *dest_filename)
{
int err = 0;
int src_fd;
struct stat statbuf;
int mode;
int dest_fd;
char *buf = xmalloc (IO_SIZE);
src_fd = open (src_filename, O_RDONLY | O_BINARY);
if (src_fd < 0)
{
err = GL_COPY_ERR_OPEN_READ;
goto error;
}
if (fstat (src_fd, &statbuf) < 0)
{
err = GL_COPY_ERR_OPEN_READ;
goto error_src;
}
mode = statbuf.st_mode & 07777;
dest_fd = open (dest_filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0600);
if (dest_fd < 0)
{
err = GL_COPY_ERR_OPEN_BACKUP_WRITE;
goto error_src;
}
/* Copy the file contents. */
for (;;)
{
size_t n_read = safe_read (src_fd, buf, IO_SIZE);
if (n_read == SAFE_READ_ERROR)
{
err = GL_COPY_ERR_READ;
goto error_src_dest;
}
if (n_read == 0)
break;
if (full_write (dest_fd, buf, n_read) < n_read)
{
err = GL_COPY_ERR_WRITE;
goto error_src_dest;
}
}
free (buf);
#if !USE_ACL
if (close (dest_fd) < 0)
{
err = GL_COPY_ERR_WRITE;
goto error_src;
}
if (close (src_fd) < 0)
{
err = GL_COPY_ERR_AFTER_READ;
goto error;
}
#endif
/* Preserve the access and modification times. */
#if HAVE_UTIME
{
struct utimbuf ut;
ut.actime = statbuf.st_atime;
ut.modtime = statbuf.st_mtime;
utime (dest_filename, &ut);
}
#elif HAVE_UTIMES
{
struct timeval ut[2];
ut[0].tv_sec = statbuf.st_atime; ut[0].tv_usec = 0;
ut[1].tv_sec = statbuf.st_mtime; ut[1].tv_usec = 0;
utimes (dest_filename, &ut);
}
#endif
#if HAVE_CHOWN
/* Preserve the owner and group. */
chown (dest_filename, statbuf.st_uid, statbuf.st_gid);
#endif
/* Preserve the access permissions. */
#if USE_ACL
switch (qcopy_acl (src_filename, src_fd, dest_filename, dest_fd, mode))
{
case -2:
err = GL_COPY_ERR_GET_ACL;
goto error_src_dest;
case -1:
err = GL_COPY_ERR_SET_ACL;
goto error_src_dest;
}
#else
chmod (dest_filename, mode);
#endif
#if USE_ACL
if (close (dest_fd) < 0)
{
err = GL_COPY_ERR_WRITE;
goto error_src;
}
if (close (src_fd) < 0)
{
err = GL_COPY_ERR_AFTER_READ;
goto error;
}
#endif
return 0;
error_src_dest:
close (dest_fd);
error_src:
close (src_fd);
error:
return err;
}
