--- /sys/src/9/boot/boot.c	Sat Mar 28 08:11:48 2015+++ ../frontmods/boot/boot.c	Fri Dec  7 23:24:22 2018@@ -9,6 +9,7 @@ { 	char cputype[64]; 	char buf[32];+	char bootcmd[64];  	fmtinstall('r', errfmt); @@ -36,6 +37,7 @@ 	USED(argc);  	readfile("#e/cputype", cputype, sizeof(cputype));+	readfile("#e/bootcmd", bootcmd, sizeof(bootcmd));  	/* setup the boot namespace */ 	bind("/boot", "/bin", MAFTER);@@ -44,5 +46,7 @@ 	snprint(buf, sizeof(buf), "/%s/bin", cputype); 	bind(buf, "/bin", MAFTER); 	bind("/rc/bin", "/bin", MAFTER);+	if(strcmp(bootcmd, "plan9rc")==0)+		exec("/boot/plan9rc", argv); 	exec("/bin/bootrc", argv); }