fts_read and fts_children do not return any file or directory

[fuck-shithub]

Hello, I am developing a server program for Alpine Linux, and I want to traverse file hierarchies, so I look up functions to do just that, and I find nftw which apparently sucks (stupid callback) so I saw the fts family of functions from BSD. Turns out musl does not support it but this package should, so I write a function using fts and it doesn't work at all and I don't know why.

Here is the relevant function I wrote. The output is just . Am I doing something wrong or is this fts implementation broken on Alpine Linux? I rewrote it in nftw and that works, but I don't like nftw's design and that it requires global variables.

/*
 * Free after use with xmlFree
 */
xmlChar *
generate_tracks_xml_fts(void)
{
    xmlNodePtr root_node;
    xmlChar *xmlbuf;
    FTS *fts;
    FTSENT *parent;
    FTSENT *child;

    doc = xmlNewDoc(BAD_CAST "1.0");
    root_node = xmlNewNode(NULL, BAD_CAST "releases");
    xmlDocSetRootElement(doc, root_node);

    char *path_argv[] = { (char*) MUSIC_PATH, NULL };
    fts = fts_open(path_argv, FTS_NOCHDIR | FTS_XDEV, NULL);
    if (fts == NULL) {
        if (errno != ENOENT) {
            fprintf(stderr, "Failed to fts_open %s", MUSIC_PATH);
        }
        return 0;
    }

    while ((parent = fts_read(fts)) != NULL) {
        child = fts_children(fts, 0);

        if (errno != 0) {
            perror("fts_children");
        }

        while ((child != NULL)
            && (child->fts_link != NULL)) {
            child = child->fts_link;
            switch (child->fts_info) {
                case FTS_F:
                    xmlNewTextChild(root_node, NULL, BAD_CAST "track", BAD_CAST child->fts_name);
                    puts(child->fts_name);
                    break;
            }
        }
    }
    fts_close(fts);

    xmlDocDumpFormatMemory(doc, &xmlbuf, NULL, 1);
    return xmlbuf;
}

[wdlkmpx]

The way to know whether your code is broken is to link against glibc, if your code works with glibc then this implementation probably needs fixing