/*
- Copyright (C) Andrew Tridgell 1998
- Copyright (C) 2002 by Martin Pool
-
- 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 2 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., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
+ * File IO utilities used in rsync.
+ *
+ * Copyright (C) 1998 Andrew Tridgell
+ * Copyright (C) 2002 Martin Pool
+ * Copyright (C) 2004, 2005, 2006 Wayne Davison
+ *
+ * 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 2 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.
+ */
-/*
- File IO utilities used in rsync
- */
#include "rsync.h"
+#ifndef ENODATA
+#define ENODATA EAGAIN
+#endif
+
extern int sparse_files;
static char last_byte;
window_start = offset;
window_size = map->def_window_size;
if (window_start + window_size > map->file_size)
- window_size = map->file_size - window_start;
+ window_size = (int32)(map->file_size - window_start);
if (len > window_size)
window_size = len;
window_start < map->p_offset + map->p_len &&
window_start + window_size >= map->p_offset + map->p_len) {
read_start = map->p_offset + map->p_len;
- read_offset = read_start - window_start;
+ read_offset = (int32)(read_start - window_start);
read_size = window_size - read_offset;
memmove(map->p, map->p + (map->p_len - read_offset), read_offset);
} else {
rprintf(FERROR, "invalid read_size of %ld in map_ptr\n",
(long)read_size);
exit_cleanup(RERR_FILEIO);
- } else {
- if (map->p_fd_offset != read_start) {
- OFF_T ret = do_lseek(map->fd, read_start, SEEK_SET);
- if (ret != read_start) {
- rsyserr(FERROR, errno,
- "lseek returned %.0f, not %.0f",
- (double)ret, (double)read_start);
- exit_cleanup(RERR_FILEIO);
- }
- map->p_fd_offset = read_start;
- }
+ }
- if ((nread=read(map->fd,map->p + read_offset,read_size)) != read_size) {
- if (nread < 0) {
- nread = 0;
- if (!map->status)
- map->status = errno;
- }
- /* the best we can do is zero the buffer - the file
- has changed mid transfer! */
- memset(map->p+read_offset+nread, 0, read_size - nread);
+ if (map->p_fd_offset != read_start) {
+ OFF_T ret = do_lseek(map->fd, read_start, SEEK_SET);
+ if (ret != read_start) {
+ rsyserr(FERROR, errno, "lseek returned %.0f, not %.0f",
+ (double)ret, (double)read_start);
+ exit_cleanup(RERR_FILEIO);
}
- map->p_fd_offset += nread;
+ map->p_fd_offset = read_start;
}
-
map->p_offset = window_start;
map->p_len = window_size;
+ while (read_size > 0) {
+ nread = read(map->fd, map->p + read_offset, read_size);
+ if (nread <= 0) {
+ if (!map->status)
+ map->status = nread ? errno : ENODATA;
+ /* The best we can do is zero the buffer -- the file
+ * has changed mid transfer! */
+ memset(map->p + read_offset, 0, read_size);
+ break;
+ }
+ map->p_fd_offset += nread;
+ read_offset += nread;
+ read_size -= nread;
+ }
+
return map->p;
}