Initial commit

1 files changed, 42 insertions, 0 deletions

diff --git a/sys/fio/fdevblk.x b/sys/fio/fdevblk.x
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index 00000000..b3a73cab
--- /dev/null
+++ b/sys/fio/fdevblk.x
@@ -0,0 +1,42 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<syserr.h>
+include	<fset.h>
+
+# FDEVBLK -- Get the device block size of the device on which the named logical
+# directory resides.  The named logical directory must have write permission.
+# A file pathname may be used to pass the logical directory name.
+
+int procedure fdevblk (path)
+
+char	path[ARB]			# pathname of directory or file
+
+pointer	sp, fname, ldir, tempfn
+int	fd, junk, block_size
+int	fstati(), open(), fnldir()
+errchk	mktemp, open, close
+
+begin
+	call smark (sp)
+	call salloc (ldir,   SZ_PATHNAME, TY_CHAR)
+	call salloc (fname,  SZ_PATHNAME, TY_CHAR)
+	call salloc (tempfn, SZ_PATHNAME, TY_CHAR)
+
+	# Generate the name of a temporary file in named directory.
+	junk = fnldir (path, Memc[ldir], SZ_PATHNAME)
+	call strcpy (Memc[ldir], Memc[fname], SZ_PATHNAME)
+	call strcat ("zbk", Memc[fname], SZ_PATHNAME)
+	call mktemp (Memc[fname], Memc[tempfn], SZ_PATHNAME)
+
+	# Open the file and get the device block size.
+	iferr {
+	    fd = open (Memc[tempfn], NEW_FILE, BINARY_FILE)
+	    block_size = fstati (fd, F_BLKSIZE)
+	    call close (fd)
+	    call delete (Memc[tempfn])
+	} then
+	    call syserrs (SYS_FACCDIR, Memc[ldir])
+
+	call sfree (sp)
+	return (block_size)
+end