#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>

int main(int argc, char **argv) {
    const char *appdir = "/root/linuxdeploy-root";
    char apprun[256], ldbin[256], new_path[4096];
    struct stat st;

    snprintf(apprun, sizeof(apprun), "%s/AppRun", appdir);
    snprintf(ldbin, sizeof(ldbin), "%s/usr/bin/linuxdeploy", appdir);

    fprintf(stderr, "[ld-wrapper] APPDIR=%s\n", appdir);
    fprintf(stderr, "[ld-wrapper] AppRun exists: %s\n", stat(apprun, &st) == 0 ? "yes" : "NO");
    fprintf(stderr, "[ld-wrapper] linuxdeploy exists: %s\n", stat(ldbin, &st) == 0 ? "yes" : "NO");
    fflush(stderr);

    setenv("APPDIR", appdir, 1);
    char *old_path = getenv("PATH");
    snprintf(new_path, sizeof(new_path), "%s/usr/bin:%s", appdir, old_path ? old_path : "");
    setenv("PATH", new_path, 1);

    if (stat(ldbin, &st) == 0) {
        fprintf(stderr, "[ld-wrapper] exec %s\n", ldbin);
        fflush(stderr);
        execv(ldbin, argv);
        perror("[ld-wrapper] execv linuxdeploy");
    }

    fprintf(stderr, "[ld-wrapper] fallback exec %s\n", apprun);
    fflush(stderr);
    execv(apprun, argv);
    perror("[ld-wrapper] execv AppRun");
    return 1;
}