+/*********************************************************
+for rename across filesystems Patch from Warren Birnbaum
+<warrenb@hpcvscdp.cv.hp.com>
+**********************************************************/
+
+static int copy_reg(char *source, const char *dest)
+{
+ SMB_STRUCT_STAT source_stats;
+ int ifd;
+ int ofd;
+ char *buf;
+ int len; /* Number of bytes read into `buf'. */
+
+ sys_lstat (source, &source_stats);
+ if (!S_ISREG (source_stats.st_mode))
+ return 1;
+
+ if (unlink (dest) && errno != ENOENT)
+ return 1;
+
+ if((ifd = open (source, O_RDONLY, 0)) < 0)
+ return 1;
+
+ if((ofd = open (dest, O_WRONLY | O_CREAT | O_TRUNC, 0600)) < 0 )
+ {
+ close (ifd);
+ return 1;
+ }
+
+ if((buf = malloc( COPYBUF_SIZE )) == NULL)
+ {
+ close (ifd);
+ close (ofd);
+ unlink (dest);
+ return 1;
+ }
+
+ while ((len = read(ifd, buf, COPYBUF_SIZE)) > 0)
+ {
+ if (write_data(ofd, buf, len) < 0)
+ {
+ close (ifd);
+ close (ofd);
+ unlink (dest);
+ free(buf);
+ return 1;
+ }
+ }
+ free(buf);
+ if (len < 0)
+ {
+ close (ifd);
+ close (ofd);
+ unlink (dest);
+ return 1;
+ }
+
+ if (close (ifd) < 0)
+ {
+ close (ofd);
+ return 1;
+ }
+ if (close (ofd) < 0)
+ return 1;
+
+ /* chown turns off set[ug]id bits for non-root,
+ so do the chmod last. */
+
+ /* Try to copy the old file's modtime and access time. */
+ {
+ struct utimbuf tv;
+
+ tv.actime = source_stats.st_atime;
+ tv.modtime = source_stats.st_mtime;
+ if (utime (dest, &tv))
+ return 1;
+ }
+
+ /* Try to preserve ownership. For non-root it might fail, but that's ok.
+ But root probably wants to know, e.g. if NFS disallows it. */
+ if (chown (dest, source_stats.st_uid, source_stats.st_gid)
+ && (errno != EPERM))
+ return 1;
+
+ if (chmod (dest, source_stats.st_mode & 07777))
+ return 1;
+
+ unlink (source);
+ return 0;
+}
+