X-Git-Url: http://git.ipfire.org/?p=thirdparty%2Fmdadm.git;a=blobdiff_plain;f=util.c;h=fe46f3b02d9c20a58079e0f70f8b48d41308d1e5;hp=0c1dfeebfa94ca96b56ee3a1e2fb6d5226fd38af;hb=44d2e36556921e82a9fde02b554f799741c92531;hpb=77472ff8d0a7e72b2da72c05dbbe1bf1adc0f2ca

diff --git a/util.c b/util.c
index 0c1dfeeb..fe46f3b0 100644
--- a/util.c
+++ b/util.c
@@ -1074,6 +1074,64 @@ int signal_mdmon(int devnum)
 	return 0;
 }
 
+int start_mdmon(int devnum)
+{
+	int i;
+	int len;
+	char pathbuf[1024];
+	char *paths[4] = {
+		pathbuf,
+		"/sbin/mdmon",
+		"mdmon",
+		NULL
+	};
+
+	if (env_no_mdmon())
+		return 0;
+
+	len = readlink("/proc/self/exe", pathbuf, sizeof(pathbuf));
+	if (len > 0) {
+		char *sl;
+		pathbuf[len] = 0;
+		sl = strrchr(pathbuf, '/');
+		if (sl)
+			sl++;
+		else
+			sl = pathbuf;
+		strcpy(sl, "mdmon");
+	} else
+		pathbuf[0] = '\0';
+
+	switch(fork()) {
+	case 0:
+		/* FIXME yuk. CLOSE_EXEC?? */
+		for (i=3; i < 100; i++)
+			close(i);
+		for (i=0; paths[i]; i++)
+			if (paths[i][0])
+				execl(paths[i], "mdmon",
+				      map_dev(dev2major(devnum),
+					      dev2minor(devnum),
+					      1), NULL);
+		exit(1);
+	case -1: fprintf(stderr, Name ": cannot run mdmon. "
+			 "Array remains readonly\n");
+		return -1;
+	default: ; /* parent - good */
+	}
+	return 0;
+}
+
+int env_no_mdmon(void)
+{
+	char *val = getenv("MDADM_NO_MDMON");
+
+	if (val && atoi(val) == 1)
+		return 1;
+
+	return 0;
+}
+
 
 int flush_metadata_updates(struct supertype *st)
 {