android liblog and getopt example

salsa_pretranslator.c

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <libgen.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <getopt.h>

#if defined TARGET
#include "android/log.h"
#endif
int main(int argc, char *argv[]) {
    static struct option long_options[] = {
        {"input-file-name" ,     required_argument,       0,  0 },
        {"output-file-name",     required_argument,       0,  0 },
        {"input-fd"        ,     required_argument,       0,  0 },
        {"output-fd"       ,     required_argument,       0,  0 },
        {"apk"             ,     required_argument,       0,  0 },
    };
    int opt_index = 0;
    char *salsa_file_name = 0;
    while (getopt_long(argc, argv, "", long_options, &opt_index) == 0) {
        if (opt_index == 1) {
            salsa_file_name = optarg;
        }
    }
    
    int fd = open(salsa_file_name, O_CREAT | O_TRUNC, 0755);
#if defined TARGET
    if (fd == -1) {
        __android_log_print(ANDROID_LOG_INFO, "salsa_pretranslator", "salsa_pretranslator: create for %s failed, error: %s\n", salsa_file_name, strerror(errno));
    } else {
        __android_log_print(ANDROID_LOG_INFO, "salsa_pretranslator", "salsa_pretranslator: %s created\n", salsa_file_name);
    }
#endif
    return 0;
}