Initial commit

1 files changed, 49 insertions, 0 deletions

diff --git a/sys/etc/xgdevlist.x b/sys/etc/xgdevlist.x
new file mode 100644
index 00000000..d20b68a9
--- /dev/null
+++ b/sys/etc/xgdevlist.x
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+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<syserr.h>
+include	<xalloc.h>
+
+# XGDEVLIST -- Fetch the allocation string for the named logical device from
+# the device table (tapecap file).  DV_DEVNOTFOUND is returned there is no
+# entry in the device table for the device.  An error action is taken if there
+# is any problem reading the device entry.
+#
+# This routine is a bit of an anachronism in the days of tapecap, but is
+# left pretty much as it was originally to minimize code modifications.
+# In principle the allocation code can be used to allocate any device, not
+# just tape drives.  This is still the case, given an entry for the device
+# in the tapecap file.
+
+int procedure xgdevlist (device, outstr, maxch, onedev)
+
+char	device[ARB]		#I logical device name
+char	outstr[maxch]		#O receives device list
+int	maxch			#I max chars out
+int	onedev			#I return i/o device instead?
+
+pointer	gty
+int	nchars
+pointer	mtcap()
+int	gtygets(), strlen()
+errchk	syserrs
+
+begin
+	# Fetch the tapecap entry for the named device.  Do not close the GTY
+	# descriptor.  mtcap always keeps the last one in an internal cache.
+
+	iferr (gty = mtcap (device))
+	    return (DV_DEVNOTFOUND)
+
+	if (onedev == YES)
+	    nchars = gtygets (gty, "dv", outstr, maxch)
+	else
+	    nchars = gtygets (gty, "al", outstr, maxch)
+
+	call ki_xnode (device, outstr, maxch)
+	nchars = strlen (outstr)
+
+	if (nchars <= 0)
+	    call syserrs (SYS_MTTAPECAP, device)
+
+	return (OK)
+end