From: Bill Joy <wnj@ucbvax.Berkeley.EDU>
Date: Sat, 3 Apr 1982 01:29:00 +0000 (-0800)
Subject: date and time created 82/04/02 10:29:00 by wnj
X-Git-Tag: BSD-4_1c_2-Snapshot-Development~3699
X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/commitdiff_plain/ca8801748a860957b676a9d39c9290cdce7eb15b

date and time created 82/04/02 10:29:00 by wnj

SCCS-vsn: usr.sbin/rmt/rmt.c 4.1
---

diff --git a/usr/src/usr.sbin/rmt/rmt.c b/usr/src/usr.sbin/rmt/rmt.c
new file mode 100644
index 0000000000..26ddf1873e
--- /dev/null
+++ b/usr/src/usr.sbin/rmt/rmt.c
@@ -0,0 +1,163 @@
+#ifndef lint
+static char sccsid[] = "@(#)rmt.c	4.1 82/04/02";
+#endif
+
+/*
+ * rmt
+ */
+#include <stdio.h>
+#include <sgtty.h>
+#include <sys/types.h>
+#include <sys/mtio.h>
+#include <errno.h>
+
+int	tape = -1;
+
+#define	MAXRECSIZ	(60*1024)
+char	record[MAXRECSIZ];
+
+#define	SSIZE	64
+char	device[SSIZE];
+char	count[SSIZE], mode[SSIZE], pos[SSIZE], op[SSIZE];
+
+extern	errno;
+char	*sys_errlist[];
+char	resp[BUFSIZ];
+
+char	*sprintf();
+long	lseek();
+
+FILE	*debug;
+
+main(argc, argv)
+	int argc;
+	char **argv;
+{
+	long rval;
+	char c;
+	int n, i, cc;
+
+	argc--, argv++;
+	if (argc > 0) {
+		debug = fopen(*argv, "w");
+		if (debug == 0)
+			exit(1);
+		(void) setbuf(debug, (char *)0);
+	}
+top:
+	errno = 0;
+	rval = 0;
+	if (read(0, &c, 1) != 1)
+		exit(0);
+	switch (c) {
+
+	case 'O':
+		if (tape >= 0)
+			(void) close(tape);
+		gets(device); gets(mode);
+if (debug) fprintf(debug, "rmtd: O %s %s\n", device, mode);
+		tape = open(device, atoi(mode));
+		if (tape < 0)
+			goto ioerror;
+		break;
+
+	case 'C':
+if (debug) fprintf(debug, "rmtd: C\n");
+		gets(device);		/* discard */
+		if (close(tape) < 0)
+			goto ioerror;
+		tape = -1;
+		break;
+
+	case 'L':
+		gets(count); gets(pos);
+if (debug) fprintf(debug, "rmtd: L %s %s\n", count, pos);
+		rval = lseek(tape, (long) atoi(count), atoi(pos));
+		if (rval < 0)
+			goto ioerror;
+		break;
+
+	case 'W':
+		gets(count);
+		n = atoi(count);
+if (debug) fprintf(debug, "rmtd: W %s\n", count);
+		for (i = 0; i < n; i += cc) {
+			cc = read(0, &record[i], n - i);
+			if (cc <= 0) {
+if (debug) fprintf(debug, "rmtd: premature eof\n");
+				exit(1);
+			}
+		}
+		rval = write(tape, record, n);
+		if (rval < 0)
+			goto ioerror;
+		break;
+
+	case 'R':
+		gets(count);
+if (debug) fprintf(debug, "rmtd: R %s\n", count);
+		n = atoi(count);
+		if (n > sizeof (record))
+			n = sizeof (record);
+		rval = read(tape, record, n);
+		if (rval < 0)
+			goto ioerror;
+		(void) write(1, record, n);
+		break;
+
+	case 'I':
+		gets(op); gets(count);
+if (debug) fprintf(debug, "rmtd: I %s %s\n", op, count);
+		{ struct mtop mtop;
+		  mtop.mt_op = atoi(op);
+		  mtop.mt_count = atoi(count);
+		  if (ioctl(tape, MTIOCTOP, (char *)&mtop) < 0)
+			goto ioerror;
+		  rval = mtop.mt_count;
+		}
+		break;
+
+	case 'S':		/* status */
+if (debug) fprintf(debug, "rmtd: S\n");
+		{ struct mtget mtget;
+		  if (ioctl(tape, MTIOCGET, (char *)&mtget) < 0)
+			goto ioerror;
+		  rval = sizeof (mtget);
+		  (void) write(1, (char *)&mtget, sizeof (mtget));
+		  break;
+		}
+
+	default:
+if (debug) fprintf(debug, "rmtd: garbage command %c\n", c);
+		exit(1);
+	}
+	(void) sprintf(resp, "A%d\n", rval);
+	(void) write(1, resp, strlen(resp));
+	goto top;
+ioerror:
+	error(errno);
+	goto top;
+}
+
+gets(bp)
+	char *bp;
+{
+	int i;
+	char *cp = bp;
+
+	for (i = 0; i < SSIZE; i++) {
+		if (read(0, cp+i, 1) != 1)
+			exit(0);
+		if (cp[i] == '\n')
+			break;
+	}
+	cp[i] = '\0';
+}
+
+error(num)
+	int num;
+{
+
+	(void) sprintf(resp, "E%d\n%s\n", num, sys_errlist[num]);
+	(void) write(1, resp, strlen (resp));
+}