make busybox passwd work when /etc/passwd is a symlink to /rom

SVN-Revision: 431

openwrt/package/busybox/patches/140-unlink-passwd.patch

@@ -0,0 +1,32 @@
+--- busybox-1.00.old/loginutils/passwd.c	2004-09-15 04:39:09.000000000 +0200
++++ busybox-1.00/loginutils/passwd.c	2005-03-23 15:31:07.000000000 +0100
+@@ -54,11 +54,12 @@
+ 		snprintf(filename, sizeof filename, "%s", bb_path_passwd_file);
+ 	}
+ 
+-	if (((fp = fopen(filename, "r+")) == 0) || (fstat(fileno(fp), &sb))) {
++	if (((fp = fopen(filename, "r")) == 0) || (fstat(fileno(fp), &sb))) {
+ 		/* return 0; */
+ 		return 1;
+ 	}
+ 
++#if 0
+ 	/* Lock the password file before updating */
+ 	lock.l_type = F_WRLCK;
+ 	lock.l_whence = SEEK_SET;
+@@ -69,6 +70,7 @@
+ 		return 1;
+ 	}
+ 	lock.l_type = F_UNLCK;
++#endif
+ 
+ 	snprintf(buf, sizeof buf, "%s-", filename);
+ 	if (create_backup(buf, fp)) {
+@@ -119,6 +121,7 @@
+ 		fclose(fp);
+ 		return 1;
+ 	}
++	unlink(filename);
+ 	if (rename(buf, filename) < 0) {
+ 		fcntl(fileno(fp), F_SETLK, &lock);
+ 		fclose(fp);