source: mainline/uspace/app/tester/stdio/stdio1.c@ fa09449

/*
 * Copyright (c) 2008 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
 */

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include "../tester.h"

#define BUF_SIZE 32
static char buf[BUF_SIZE + 1];

char * test_stdio1(bool quiet)
{
        FILE *f;
        char *file_name = "/readme";
        size_t n;
        int c;

        printf("Open file '%s'\n", file_name);
        errno = 0;
        f = fopen(file_name, "rt");

        if (f == NULL) printf("errno = %d\n", errno);

        if (f == NULL)
                return "Failed opening file.";

        n = fread(buf, 1, BUF_SIZE, f);
        if (ferror(f)) {
                fclose(f);
                return "Failed reading file.";
        }

        printf("Read %d bytes.\n", n);

        buf[n] = '\0';
        printf("Read string '%s'.\n", buf);

        printf("Seek to beginning.\n");
        if (fseek(f, 0, SEEK_SET) != 0) {
                fclose(f);
                return "Failed seeking.";
        }

        printf("Read using fgetc().\n");
        while (true) {
                c = fgetc(f);
                if (c == EOF) break;

                printf("'%c'", c);
        }

        printf("[EOF]\n");
        printf("Closing.\n");

        if (fclose(f) != 0)
                return "Failed closing.";

        return NULL;
}