[Optimus L3, L5, L7 Q&A, Help & Troubleshooting] -CALIBAN666-:
copy from CyanogenMod Forum:

it looks like the error is related to SELinux. But it seems safe to ignore.

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/*

* Copyright (C) 2009 The Android Open Source Project

*

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

*

* http://www.apache.org/licenses/LICENSE-2.0

*

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

*/

#include <stdio.h>

#include <unistd.h>

#include <stdlib.h>

#include "edify/expr.h"

#include "updater.h"

#include "install.h"

#include "minzip/Zip.h"

// Generated by the makefile, this function defines the

// RegisterDeviceExtensions() function, which calls all the

// registration functions for device-specific extensions.

#include "register.inc"

// Where in the package we expect to find the edify script to execute.

// (Note it's "updateR-script", not the older "update-script".)

#define SCRIPT_NAME "META-INF/com/google/android/updater-script"

struct selabel_handle *sehandle;

int main(int argc, char** argv) {

// Various things log information to stdout or stderr more or less

// at random. The log file makes more sense if buffering is

// turned off so things appear in the right order.

setbuf(stdout, NULL);

setbuf(stderr, NULL);

if (argc != 4) {

fprintf(stderr, "unexpected number of arguments (%d)\n", argc);

return 1;

}

char* version = argv[1];

if ((version[0] != '1' && version[0] != '2' && version[0] != '3') ||

version[1] != '\0') {

// We support version 1, 2, or 3.

fprintf(stderr, "wrong updater binary API; expected 1, 2, or 3; "

"got %s\n",

argv[1]);

return 2;

}

// Set up the pipe for sending commands back to the parent process.

int fd = atoi(argv[2]);

FILE* cmd_pipe = fdopen(fd, "wb");

setlinebuf(cmd_pipe);

// Extract the script from the package.

char* package_data = argv[3];

ZipArchive za;

int err;

err = mzOpenZipArchive(package_data, &za);

if (err != 0) {

fprintf(stderr, "failed to open package %s: %s\n",

package_data, strerror(err));

return 3;

}

const ZipEntry* script_entry = mzFindZipEntry(&za, SCRIPT_NAME);

if (script_entry == NULL) {

fprintf(stderr, "failed to find %s in %s\n", SCRIPT_NAME, package_data);

return 4;

}

char* script = malloc(script_entry->uncompLen+1);

if (!mzReadZipEntry(&za, script_entry, script, script_entry->uncompLen)) {

fprintf(stderr, "failed to read script from package\n");

return 5;

}

script[script_entry->uncompLen] = '\0';

// Configure edify's functions.

RegisterBuiltins();

RegisterInstallFunctions();

RegisterDeviceExtensions();

FinishRegistration();

// Parse the script.

Expr* root;

int error_count = 0;

yy_scan_string(script);

int error = yyparse(&root, &error_count);

if (error != 0 || error_count > 0) {

fprintf(stderr, "%d parse errors\n", error_count);

return 6;

}

struct selinux_opt seopts[] = {

{ SELABEL_OPT_PATH, "/file_contexts" }

};

sehandle = selabel_open(SELABEL_CTX_FILE, seopts, 1);

if (!sehandle) {

fprintf(stderr, "Warning: No file_contexts\n");

fprintf(cmd_pipe, "ui_print Warning: No file_contexts\n");

}

// Evaluate the parsed script.

UpdaterInfo updater_info;

updater_info.cmd_pipe = cmd_pipe;

updater_info.package_zip = &za;

updater_info.version = atoi(version);

State state;

state.cookie = &updater_info;

state.script = script;

state.errmsg = NULL;

char* result = Evaluate(&state, root);

if (result == NULL) {

if (state.errmsg == NULL) {

fprintf(stderr, "script aborted (no error message)\n");

fprintf(cmd_pipe, "ui_print script aborted (no error message)\n");

} else {

fprintf(stderr, "script aborted: %s\n", state.errmsg);

char* line = strtok(state.errmsg, "\n");

while (line) {

fprintf(cmd_pipe, "ui_print %s\n", line);

line = strtok(NULL, "\n");

}

fprintf(cmd_pipe, "ui_print\n");

}

free(state.errmsg);

return 7;

} else {

fprintf(stderr, "script result was [%s]\n", result);

free(result);

}

if (updater_info.package_zip) {

mzCloseZipArchive(updater_info.package_zip);

}

free(script);

return 0;

}

http://forum.cyanogenmod.com/topic/75956-cwm-on-nexus-4-after-43-update/