method

readlink

v1_9_1_378 - Show latest stable - 0 notes - Class: File

readlink(p1) public

Returns the name of the file referenced by the given link. Not available on all platforms.

File.symlink("testfile", "link2test")   #=> 0
File.readlink("link2test")              #=> "testfile"

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static VALUE
rb_file_s_readlink(VALUE klass, VALUE path)
{
#ifdef HAVE_READLINK
    char *buf;
    int size = 100;
    int rv;
    VALUE v;

    rb_secure(2);
    FilePathValue(path);
    buf = xmalloc(size);
    while ((rv = readlink(RSTRING_PTR(path), buf, size)) == size
#ifdef _AIX
            || (rv < 0 && errno == ERANGE) /* quirky behavior of GPFS */
#endif
        ) {
        size *= 2;
        buf = xrealloc(buf, size);
    }
    if (rv < 0) {
        xfree(buf);
        rb_sys_fail_path(path);
    }
    v = rb_tainted_str_new(buf, rv);
    xfree(buf);

    return v;
#else
    rb_notimplement();
    return Qnil;                /* not reached */
#endif
}

readlink

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