Initial commit

1 files changed, 31 insertions, 0 deletions

diff --git a/sys/mtio/mtskip.x b/sys/mtio/mtskip.x
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+++ b/sys/mtio/mtskip.x
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+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<fset.h>
+
+# MT_SKIP_RECORD -- Skip records on an opened file.  Return the actual number
+# of records skipped; stop if EOF is reached.
+
+int procedure mt_skip_record (fd, nrecords)
+
+int	fd				#I magtape device
+int	nrecords			#I number of records to skip
+
+pointer	sp, buf
+int	n, bufsize
+errchk	aread, await
+int	await(), fstati()
+
+begin
+	call smark (sp)
+	bufsize = fstati (fd, F_BUFSIZE)
+	call salloc (buf, bufsize, TY_CHAR)
+
+	for (n=1;  n <= nrecords;  n=n+1) {
+	    call aread (fd, Memc[buf], bufsize, 0)
+	    if (await (fd) == EOF)
+		break
+	}
+
+	call sfree (sp)
+	return (n-1)
+end