68 static int histfd = -1;  variable
542 	if (histfd != -1) {  in sethistfile()
544 		(void)close(histfd);  in sethistfile()
545 		histfd = -1;  in sethistfile()
587 	if (histfd != -1) {  in histsync()
652 	if (svmode == HIST_STORE && histfd != -1)  in histsave()
749 	histfd = savefd(fd);  in hist_init()
750 	if (histfd != fd)  in hist_init()
753 	mksh_lockfd(histfd);  in hist_init()
755 	histfsize = lseek(histfd, (off_t)0, SEEK_END);  in hist_init()
763 		    MAP_FILE | MAP_PRIVATE, histfd, (off_t)0);  in hist_init()
786 			if (fstat(histfd, &sb) >= 0 &&  in hist_init()
838 		if (write(histfd, sprinkle, 2) != 2) {  in hist_init()
843 	histfsize = lseek(histfd, (off_t)0, SEEK_END);  in hist_init()
845 	mksh_unlkfd(histfd);  in hist_init()
909 	mksh_lockfd(histfd);  in writehistfile()
910 	sizenow = lseek(histfd, (off_t)0, SEEK_END);  in writehistfile()
925 		    MAP_FILE | MAP_PRIVATE, histfd, (off_t)0);  in writehistfile()
940 	if (cmd && !writehistline(histfd, lno, cmd)) {  in writehistfile()
945 	histfsize = lseek(histfd, (off_t)0, SEEK_END);  in writehistfile()
946 	mksh_unlkfd(histfd);  in writehistfile()
967 	if (histfd >= 0) {  in hist_finish()
968 		mksh_unlkfd(histfd);  in hist_finish()
969 		(void)close(histfd);  in hist_finish()
971 	histfd = -1;  in hist_finish()