Add Erik Quanstrom's atazz

(needed to disable power management/head unload on 2.5" drive)

1 files changed, 75 insertions, 0 deletions

diff --git a/sys/src/cmd/atazz/probe.c b/sys/src/cmd/atazz/probe.c
new file mode 100644
index 000000000..7963364be
--- /dev/null
+++ b/sys/src/cmd/atazz/probe.c
@@ -0,0 +1,75 @@
+#include <u.h>
+#include <libc.h>
+#include <fis.h>
+#include "atazz.h"
+
+static int
+ckprint(char *s)
+{
+	char buf[ERRMAX];
+	int st;
+	Dev d;
+
+	squelch = 1;
+	d.fd = -1;
+	st = opendev(s, &d);
+	squelch = 0;
+	if(st == -1){
+		rerrstr(buf, sizeof buf);
+		if(strstr(buf, "ata command") != nil)
+			return 0;
+		return 0 /* -1 */;
+	}
+	close(d.fd);
+	print("%s\t%llud; %ud\t%llux\n", s, d.nsect, d.secsize, d.wwn);
+	return 1;
+}
+
+static int
+probe0(char *s, int l)
+{
+	char *p, *f[3], buf[16];
+	int i, r;
+
+	s[l] = 0;
+	r = 0;
+	for(; p = strchr(s, '\n'); s = p + 1){
+		if(tokenize(s, f, nelem(f)) < 1)
+			continue;
+		for(i = 0; i < 10; i++){
+			snprint(buf, sizeof buf, "/dev/%s%d", f[0], i);
+			switch(ckprint(buf)){
+			case -1:
+				eprint("!device error %s: %r\n", buf);
+				break;
+			case 0:
+				goto nextdev;
+			case 1:
+				r++;
+				break;
+			}
+		nextdev:
+			;
+		}
+	}
+	return r;
+}
+
+int
+probe(void)
+{
+	char *s;
+	int fd, l, r;
+
+	fd = open("/dev/sdctl", OREAD);
+	if(fd == -1)
+		return -1;
+	r = -1;
+	l = 1024;	/* #S/sdctl has 0 size; guess */
+	if(s = malloc(l + 1))
+	if((l = read(fd, s, l)) > 0)
+		r = probe0(s, l);
+	free(s);
+	close(fd);
+	return r;
+}