usr.bin/grep/grep.c

239 static off_t bufoffset;		/* Read offset; defined on regular files.  */
246 static off_t initial_bufoffset;	/* Initial value of bufoffset. */
322 	bufoffset = 0;
325 	  bufoffset = lseek (fd, 0, SEEK_CUR);
326 	  if (bufoffset < 0)
333       initial_bufoffset = bufoffset;
334       bufmapped = mmap_option && bufoffset % pagesize == 0;
386 	  off_t to_be_read = stats->stat.st_size - bufoffset;
421       if (stats->stat.st_size - bufoffset < mmapsize)
423 	  mmapsize = stats->stat.st_size - bufoffset;
430 		    bufdesc, bufoffset)
446 	  if (bufoffset != initial_bufoffset
447 	      && lseek (bufdesc, bufoffset, SEEK_SET) < 0)
495   bufoffset += fillsize;
737       after_last_match = bufoffset - (buflim - p);
776 	      after_last_match = bufoffset - (buflim - endp);
1035 	  off_t required_offset = outleft ? bufoffset : after_last_match;
1036 	  if ((bufmapped || required_offset != bufoffset)