Ticket #5055: fdtest.c

#include <dirent.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <limits.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>


int main(int argc, char** argv) {
    char fullpath[PATH_MAX + 10];
    int err;
    struct stat st;
    struct dirent *ent;
    int dfd = -1;
    DIR *dir;

    dfd = open(argv[1], O_RDONLY);
    if (dfd == -1) {
        printf("error: open!\n");
        return 1;
    }

    dir = fdopendir(dfd);
    if (!dir) {
        printf("error: dir!\n");
        return 1;
    }

    while ((ent = readdir(dir))) {
        if (!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, ".."))
            continue;

        err = fstatat(dfd, ent->d_name, &st, AT_SYMLINK_NOFOLLOW);
        if (err == -1) {
            printf("error: fstatat failed on %s\n", ent->d_name);
            printf("dfd: %i\n", dfd);
            break;
        }
    }

    close(dfd);

    return 0;
}