get_my_path_linux.c

/*
 * Copyright (C) 2007 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 <sys/types.h>
#include <unistd.h>
#include <limits.h>
#include <stdio.h>

void get_my_path(char *exe, size_t maxLen)
{
    char proc[64];
    snprintf(proc, sizeof proc, "/proc/%d/exe", getpid());
    int err = readlink(proc, exe, maxLen - 1);
    if(err > 0) {
        exe[err] = '\0';
    } else {
        exe[0] = '\0';
    }
}