[klibc] [PATCH] kinit/kinit.c

[Thayne Harbaugh]

A patch for a few more hiccups and trivialities in kinit.c:

* The check_path() calls check for "/root" and "/old_root" - I believe
that should be "/root" and "/root/old_root".

* chdir("/") is recommended after pivot_root()

* init_argv[0] isn't set properly to the basename pointed to by char *s
- this fix also eliminates six lines of unecessary code and improves
readability by using get_arg().

--- klibc-0.194/kinit/kinit.c.orig	2005-01-05 15:40:15.468305608 -0700
+++ klibc-0.194/kinit/kinit.c	2005-01-05 15:41:44.400785816 -0700
@@ -246,8 +251,9 @@
 	do_ipconfig(cmdc, cmdv);
 
 	check_path("/root");
-	check_path("/old_root");
 	do_mounts(cmdc, cmdv);
+	/* do_mounts cd's to /root so below tests /root/old_root */
+	check_path("old_root");
 
 #ifndef INI_DEBUG
 	if (pivot_root(".", "old_root") == -1) {
@@ -255,6 +261,8 @@
 		ret = 2;
 		goto bail;
 	}
+	/* the below chdir() is good style after a pivot_root() */
+	chdir("/");
 
 	if (mnt_procfs == 1)
 		umount2("/proc", 0);
@@ -262,18 +270,12 @@
 	if (mnt_sysfs == 1)
 		umount2("/sys", 0);
 
-	for (i = 1; i < cmdc; i++) {
-		if (strncmp(cmdv[i], "kinit=", 6) == 0) {
-			kinit = cmdv[i] + 6;
-		}
-	}
-	
-	if (kinit) {
+	if ((kinit = get_arg(cmdc, cmdv, "kinit="))) {
 		char *s = strrchr(kinit, '/');
 		if (s) {
 			s++;
 		}
-		init_argv[0] = kinit;
+		init_argv[0] = s;
 		execv(kinit, init_argv);
 	}
 	init_argv[0] = "init";

-- 
Thayne Harbaugh
Linux Networx
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