#define _GNU_SOURCE
#include <sys/stat.h>
#include <dlfcn.h>

/*
 * Docker Desktop Linux / macOS host-bind-mount permissions compatibility shim.
 * Masks directory permissions to satisfy PostgreSQL checkDataDir() (0700 requirement).
 */

int (*real_stat)(const char *path, struct stat *buf);
int stat(const char *path, struct stat *buf) {
    if (!real_stat) real_stat = dlsym(RTLD_NEXT, "stat");
    int res = real_stat(path, buf);
    if (res == 0 && S_ISDIR(buf->st_mode)) {
        buf->st_mode &= ~(S_IRWXG | S_IRWXO);
    }
    return res;
}

int (*real_fstatat)(int dirfd, const char *pathname, struct stat *buf, int flags);
int fstatat(int dirfd, const char *pathname, struct stat *buf, int flags) {
    if (!real_fstatat) real_fstatat = dlsym(RTLD_NEXT, "fstatat");
    int res = real_fstatat(dirfd, pathname, buf, flags);
    if (res == 0 && S_ISDIR(buf->st_mode)) {
        buf->st_mode &= ~(S_IRWXG | S_IRWXO);
    }
    return res;
}

int (*real_lstat)(const char *path, struct stat *buf);
int lstat(const char *path, struct stat *buf) {
    if (!real_lstat) real_lstat = dlsym(RTLD_NEXT, "lstat");
    int res = real_lstat(path, buf);
    if (res == 0 && S_ISDIR(buf->st_mode)) {
        buf->st_mode &= ~(S_IRWXG | S_IRWXO);
    }
    return res;
}