source: openpam/trunk/t/t_openpam_readword.c @ 555

/*-
 * Copyright (c) 2012 Dag-Erling Smørgrav
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer
 *    in this position and unchanged.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $Id$
 */

#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <security/pam_appl.h>
#include <security/openpam.h>

#include "t.h"

static char filename[1024];
static FILE *f;

/*
 * Open the temp file and immediately unlink it so it doesn't leak in case
 * of premature exit.
 */
static void
orw_open(void)
{
        int fd;

        if ((fd = open(filename, O_RDWR|O_CREAT|O_TRUNC, 0600)) < 0)
                err(1, "%s(): %s", __func__, filename);
        if ((f = fdopen(fd, "r+")) == NULL)
                err(1, "%s(): %s", __func__, filename);
        if (unlink(filename) < 0)
                err(1, "%s(): %s", __func__, filename);
}

/*
 * Write text to the temp file.
 */
static void
orw_output(const char *fmt, ...)
{
        va_list ap;

        va_start(ap, fmt);
        vfprintf(f, fmt, ap);
        va_end(ap);
        if (ferror(f))
                err(1, "%s", filename);
}
        
/*
 * Rewind the temp file.
 */
static void
orw_rewind(void)
{

        errno = 0;
        rewind(f);
        if (errno != 0)
                err(1, "%s(): %s", __func__, filename);
}

/*
 * Read a word from the temp file and verify that the result matches our
 * expectations: whether a word was read at all, how many lines were read
 * (in case of quoted or escaped newlines), whether we reached the end of
 * the file and whether we reached the end of the line.
 */
static int
orw_expect(const char *expected, int lines, int eof, int eol)
{
        int ch, lineno = 0;
        char *got;
        size_t len;

        got = openpam_readword(f, &lineno, &len);
        if (ferror(f))
                err(1, "%s(): %s", __func__, filename);
        if (expected != NULL && got == NULL) {
                t_verbose("expected <<%s>>, got nothing\n", expected);
                return (0);
        }
        if (expected == NULL && got != NULL) {
                t_verbose("expected nothing, got <<%s>>\n", got);
                return (0);
        }
        if (expected != NULL && got != NULL && strcmp(expected, got) != 0) {
                t_verbose("expected <<%s>>, got <<%s>>\n", expected, got);
                return (0);
        }
        if (lineno != lines) {
                t_verbose("expected to advance %d lines, advanced %d lines\n");
                return (0);
        }
        if (eof && !feof(f)) {
                t_verbose("expected EOF, but didn't get it\n");
                return (0);
        }
        if (!eof && feof(f)) {
                t_verbose("didn't expect EOF, but got it anyway\n");
                return (0);
        }
        ch = fgetc(f);
        if (ferror(f))
                err(1, "%s(): %s", __func__, filename);
        if (eol && ch != '\n') {
                t_verbose("expected EOL, but didn't get it\n");
                return (0);
        }
        if (!eol && ch == '\n') {
                t_verbose("didn't expect EOL, but got it anyway\n");
                return (0);
        }
        if (ch != EOF)
                ungetc(ch, f);
        return (1);
}

/*
 * Close the temp file.
 */
void
orw_close(void)
{

        if (fclose(f) != 0)
                err(1, "%s(): %s", __func__, filename);
}


/***************************************************************************
 * Lines without words
 */

T_FUNC(empty_input, "empty input")
{
        int ret;

        orw_open();
        ret = orw_expect(NULL, 0 /*lines*/, 1 /*eof*/, 0 /*eol*/);
        orw_close();
        return (ret);
}

T_FUNC(empty_line, "empty line")
{
        int ret;

        orw_open();
        orw_output("\n");
        orw_rewind();
        ret = orw_expect(NULL, 0 /*lines*/, 0 /*eof*/, 1 /*eol*/);
        orw_close();
        return (ret);
}

T_FUNC(single_whitespace, "single whitespace")
{
        int ret;

        orw_open();
        orw_output(" \n");
        orw_rewind();
        ret = orw_expect(NULL, 0 /*lines*/, 0 /*eof*/, 1 /*eol*/);
        orw_close();
        return (ret);
}

T_FUNC(multiple_whitespace, "multiple whitespace")
{
        int ret;

        orw_open();
        orw_output(" \t\r\n");
        orw_rewind();
        ret = orw_expect(NULL, 0 /*lines*/, 0 /*eof*/, 1 /*eol*/);
        orw_close();
        return (ret);
}

T_FUNC(comment, "comment")
{
        int ret;

        orw_open();
        orw_output("# comment\n");
        orw_rewind();
        ret = orw_expect(NULL, 0 /*lines*/, 0 /*eof*/, 1 /*eol*/);
        orw_close();
        return (ret);
}

T_FUNC(whitespace_before_comment, "whitespace before comment")
{
        int ret;

        orw_open();
        orw_output(" # comment\n");
        orw_rewind();
        ret = orw_expect(NULL, 0 /*lines*/, 0 /*eof*/, 1 /*eol*/);
        orw_close();
        return (ret);
}


/***************************************************************************
 * Simple cases - no quotes or escapes
 */

T_FUNC(single_word, "single word")
{
        const char *word = "hello";
        int ret;

        orw_open();
        orw_output("%s\n", word);
        orw_rewind();
        ret = orw_expect(word, 0 /*lines*/, 0 /*eof*/, 1 /*eol*/);
        orw_close();
        return (ret);
}

T_FUNC(single_whitespace_before_word, "single whitespace before word")
{
        const char *word = "hello";
        int ret;

        orw_open();
        orw_output(" %s\n", word);
        orw_rewind();
        ret = orw_expect(word, 0 /*lines*/, 0 /*eof*/, 1 /*eol*/);
        orw_close();
        return (ret);
}

T_FUNC(double_whitespace_before_word, "double whitespace before word")
{
        const char *word = "hello";
        int ret;

        orw_open();
        orw_output("  %s\n", word);
        orw_rewind();
        ret = orw_expect(word, 0 /*lines*/, 0 /*eof*/, 1 /*eol*/);
        orw_close();
        return (ret);
}

T_FUNC(single_whitespace_after_word, "single whitespace after word")
{
        const char *word = "hello";
        int ret;

        orw_open();
        orw_output("%s \n", word);
        orw_rewind();
        ret = orw_expect(word, 0 /*lines*/, 0 /*eof*/, 0 /*eol*/);
        orw_close();
        return (ret);
}

T_FUNC(double_whitespace_after_word, "double whitespace after word")
{
        const char *word = "hello";
        int ret;

        orw_open();
        orw_output("%s  \n", word);
        orw_rewind();
        ret = orw_expect(word, 0 /*lines*/, 0 /*eof*/, 0 /*eol*/);
        orw_close();
        return (ret);
}

T_FUNC(comment_after_word, "comment after word")
{
        const char *word = "hello";
        int ret;

        orw_open();
        orw_output("%s # comment\n", word);
        orw_rewind();
        ret = orw_expect(word, 0 /*lines*/, 0 /*eof*/, 0 /*eol*/) &&
            orw_expect(NULL, 0 /*lines*/, 0 /*eof*/, 1 /*eol*/);
        orw_close();
        return (ret);
}

T_FUNC(word_containing_hash, "word containing hash")
{
        const char *word = "hello#world";
        int ret;

        orw_open();
        orw_output("%s\n", word);
        orw_rewind();
        ret = orw_expect(word, 0 /*lines*/, 0 /*eof*/, 1 /*eol*/);
        orw_close();
        return (ret);
}

T_FUNC(two_words, "two words")
{
        const char *word[] = { "hello", "world" };
        int ret;

        orw_open();
        orw_output("%s %s\n", word[0], word[1]);
        orw_rewind();
        ret = orw_expect(word[0], 0 /*lines*/, 0 /*eof*/, 0 /*eol*/) &&
            orw_expect(word[1], 0 /*lines*/, 0 /*eof*/, 1 /*eol*/);
        orw_close();
        return (ret);
}


/***************************************************************************
 * Complex cases
 */

T_FUNC(empty_single_quotes, "empty single quotes")
{
        int ret;

        orw_open();
        orw_output("''\n");
        orw_rewind();
        ret = orw_expect("", 0 /*lines*/, 0 /*eof*/, 1 /*eol*/);
        orw_close();
        return (ret);
}

T_FUNC(empty_double_quotes, "empty double quotes")
{
        int ret;

        orw_open();
        orw_output("\"\"\n");
        orw_rewind();
        ret = orw_expect("", 0 /*lines*/, 0 /*eof*/, 1 /*eol*/);
        orw_close();
        return (ret);
}



const struct t_test *t_plan[] = {
        T(empty_input),
        T(empty_line),
        T(single_whitespace),
        T(multiple_whitespace),
        T(comment),
        T(whitespace_before_comment),
        T(single_word),
        T(single_whitespace_before_word),
        T(double_whitespace_before_word),
        T(single_whitespace_after_word),
        T(double_whitespace_after_word),
        T(comment_after_word),
        T(word_containing_hash),
        T(two_words),
        T(empty_single_quotes),
        T(empty_double_quotes),
        NULL
};

const struct t_test **
t_prepare(int argc, char *argv[])
{

        (void)argc;
        (void)argv;
        snprintf(filename, sizeof filename, "%s.%d.tmp", t_progname, getpid());
        if (filename == NULL)
                err(1, "asprintf()");
        return (t_plan);
}

void
t_cleanup(void)
{
}