exev example

run_salsa_translator.c

#include <cutils/properties.h>
#include <unistd.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <android/log.h>

#define SALSA_TRANSLATOR "/system/bin/salsa_translator"
#define SALSA_TRANSLATOR_ARGC 20

int main(int orig_argc, char *orig_argv[]) {

    char **argv = malloc((SALSA_TRANSLATOR_ARGC + orig_argc) * sizeof(char *));
    memset(argv, 0, SALSA_TRANSLATOR_ARGC + orig_argc);

    int use_preopt = property_get_bool("persist.salsa.use_preopt", 0);

    int argc = 0;
    argv[argc++] = SALSA_TRANSLATOR;
    if (use_preopt) {
        argv[argc++] = "-N";
    }

    char debug[PROPERTY_VALUE_MAX] = {0};
    property_get("persist.salsa.debug", debug, "");

    if (strcmp(debug, "")) {
        argv[argc++] = "-d";
        argv[argc++] = debug;
    }

    char log[PROPERTY_VALUE_MAX] = {0};
    property_get("persist.salsa.log_dir", log, "");

    if (strcmp(log, "")) {
        argv[argc++] = "-l";
        argv[argc++] = log;
    }

    int i = 0;
    for (i = 1; i < orig_argc; i++) {
        argv[argc++ ] = orig_argv[i];
    }

    execv(SALSA_TRANSLATOR, argv);
    printf("execve failed: %d\n", errno);
}