Import sources from 2011-03-30 iso image

1 files changed, 83 insertions, 0 deletions

diff --git a/sys/src/cmd/bitsy/params.c b/sys/src/cmd/bitsy/params.c
new file mode 100755
index 000000000..4d27930e9
--- /dev/null
+++ b/sys/src/cmd/bitsy/params.c
@@ -0,0 +1,83 @@
+#include <u.h>
+#include <libc.h>
+
+void
+erase(char *part)
+{
+	char file[256];
+	int fd;
+
+	snprint(file, sizeof file, "%sctl", part);
+	fd = open(file, ORDWR);
+	if(fd < 0)
+		return;
+	fprint(fd, "erase");
+	close(fd);
+}
+
+char*
+readfile(char *file)
+{
+	char buf[512];
+	int n, fd;
+	uchar *p;
+
+	fd = open(file, OREAD);
+	if(fd < 0)
+		sysfatal("opening %s: %r", file);
+	n = read(fd, buf, sizeof(buf)-1);
+	close(fd);
+	if(n < 0)
+		return "";
+	buf[n] = 0;
+	for(p = (uchar*)buf; *p; p++)
+		if(*p == 0xff){
+			*p = 0;
+			break;
+		}
+	return strdup(buf);
+}
+
+void
+writefile(char *file, char *data)
+{
+	int fd;
+
+	fd = open(file, OWRITE);
+	if(fd < 0)
+		fd = create(file, OWRITE, 0664);
+	if(fd < 0)
+		return;
+	write(fd, data, strlen(data));
+	close(fd);
+}
+
+void
+main(int argc, char **argv)
+{
+	int from = 0;
+	char *params;
+	char *file = "/tmp/tmpparams";
+	char *part;
+
+	ARGBEGIN {
+	case 'f':
+		from++;
+		break;
+	} ARGEND;
+
+	if(argc)
+		part = argv[0];
+	else
+		part = "/dev/flash/user";
+
+	if(from){
+		params = readfile(part);
+		writefile(file, params);
+	} else {
+		params = readfile(file);
+		erase(part);
+		writefile(part, params);
+		free(params);
+	}
+}