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 (file)
index 0000000..26ddf18
--- /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));
+}