From 4bc0d1ae17db3514f55141f354ac7c5d4df7c1a5 Mon Sep 17 00:00:00 2001
From: Tom London <tbl@research.uucp>
Date: Sun, 10 Dec 1978 19:49:23 -0500
Subject: [PATCH] Bell 32V development Work on file usr/src/cmd/df.c

Co-Authored-By: John Reiser <jfr@research.uucp>
Synthesized-from: 32v
---
 usr/src/cmd/df.c | 96 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 usr/src/cmd/df.c

diff --git a/usr/src/cmd/df.c b/usr/src/cmd/df.c
new file mode 100644
index 0000000000..8d534f1ecb
--- /dev/null
+++ b/usr/src/cmd/df.c
@@ -0,0 +1,96 @@
+#include <stdio.h>
+#include <sys/param.h>
+#include <sys/filsys.h>
+#include <sys/fblk.h>
+
+daddr_t	blkno	= 1;
+char	*dargv[] = {
+	0,
+	"/dev/rp0a",
+	"/dev/rp1g",
+	0
+};
+
+
+struct	filsys sblock;
+
+int	fi;
+daddr_t	alloc();
+
+main(argc, argv)
+char **argv;
+{
+	int i;
+
+	if(argc <= 1) {
+		for(argc = 1; dargv[argc]; argc++);
+		argv = dargv;
+	}
+
+	for(i=1; i<argc; i++) {
+		dfree(argv[i]);
+	}
+}
+
+dfree(file)
+char *file;
+{
+	daddr_t i;
+
+	fi = open(file, 0);
+	if(fi < 0) {
+		fprintf(stderr,"cannot open %s\n", file);
+		return;
+	}
+	sync();
+	bread(1L, (char *)&sblock, sizeof(sblock));
+	i = 0;
+	while(alloc())
+		i++;
+	printf("%s %D\n", file, i);
+	close(fi);
+}
+
+daddr_t
+alloc()
+{
+	int i;
+	daddr_t b;
+	struct fblk buf;
+
+	i = --sblock.s_nfree;
+	if(i<0 || i>=NICFREE) {
+		printf("bad free count, b=%D\n", blkno);
+		return(0);
+	}
+	b = sblock.s_free[i];
+	if(b == 0)
+		return(0);
+	if(b<sblock.s_isize || b>=sblock.s_fsize) {
+		printf("bad free block (%D)\n", b);
+		return(0);
+	}
+	if(sblock.s_nfree <= 0) {
+		bread(b, (char *)&buf, sizeof(buf));
+		blkno = b;
+		sblock.s_nfree = buf.df_nfree;
+		for(i=0; i<NICFREE; i++)
+			sblock.s_free[i] = buf.df_free[i];
+	}
+	return(b);
+}
+
+bread(bno, buf, cnt)
+daddr_t bno;
+char *buf;
+{
+	int n;
+	extern errno;
+
+	lseek(fi, bno<<BSHIFT, 0);
+	if((n=read(fi, buf, cnt)) != cnt) {
+		printf("read error %D\n", bno);
+		printf("count = %d; errno = %d\n", n, errno);
+		exit(0);
+	}
+}
-- 
2.20.1