Function yfts_open

util/folder/fts.cpp:242–379

}

FTS* yfts_open(char* const* argv, int options, int (*compar)(const FTSENT**, const FTSENT**))
{
    FTS* sp;
    FTSENT *p, *root;
    int nitems;
    FTSENT *parent, *tmp;
    int len;

    errno = 0;

    Y_ASSERT(argv);
    if (!*argv) {
        errno = ENOENT;
        return nullptr;
    }

    /* Options check. */
    if (options & ~FTS_OPTIONMASK) {
        errno = EINVAL;
        return nullptr;
    }

    /* Allocate/initialize the stream */
    if ((sp = (FTS*)malloc(sizeof(FTS))) == nullptr) {
        return nullptr;
    }
    memset(sp, 0, sizeof(FTS));
    sp->fts_compar = compar;
    sp->fts_options = options;

    /* Shush, GCC. */
    tmp = nullptr;

    /* Logical walks turn on NOCHDIR; symbolic links are too hard. */
    if (ISSET(FTS_LOGICAL)) {
        SET(FTS_NOCHDIR);
    }

    /*
     * Start out with 1K of path space, and enough, in any case,
     * to hold the user's paths.
     */
    if (fts_palloc(sp, MAX(fts_maxarglen(argv), MAXPATHLEN))) {
        goto mem1;
    }

    /* Allocate/initialize root's parent. */
    if ((parent = fts_alloc(sp, "", 0)) == nullptr) {
        goto mem2;
    }
    parent->fts_level = FTS_ROOTPARENTLEVEL;

    /* Allocate/initialize root(s). */
    for (root = nullptr, nitems = 0; *argv; ++argv, ++nitems) {
        /* Don't allow zero-length paths. */

        len = strlen(*argv);