uspace/app/tester/stdio/stdio1.c

   1 /*
   2  * Copyright (c) 2008 Jiri Svoboda
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * - Redistributions of source code must retain the above copyright
  10  *   notice, this list of conditions and the following disclaimer.
  11  * - Redistributions in binary form must reproduce the above copyright
  12  *   notice, this list of conditions and the following disclaimer in the
  13  *   documentation and/or other materials provided with the distribution.
  14  * - The name of the author may not be used to endorse or promote products
  15  *   derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <stddef.h>
  32 #include <str_error.h>
  33 #include <errno.h>
  34 #include "../tester.h"
  35
  36 #define BUF_SIZE  32
  37
  38 static char buf[BUF_SIZE + 1];
  39
  40 const char *test_stdio1(void)
  41 {
  42         FILE *file;
  43         const char *file_name = "/demo.txt";
  44
  45         TPRINTF("Open file \"%s\"...", file_name);
  46         errno = 0;
  47         file = fopen(file_name, "rt");
  48         if (file == NULL) {
  49                 TPRINTF("errno = %s\n", str_error_name(errno));
  50                 return "Failed opening file";
  51         } else
  52                 TPRINTF("OK\n");
  53
  54         TPRINTF("Read file...");
  55         size_t cnt = fread(buf, 1, BUF_SIZE, file);
  56         if (ferror(file)) {
  57                 TPRINTF("errno = %s\n", str_error_name(errno));
  58                 fclose(file);
  59                 return "Failed reading file";
  60         } else
  61                 TPRINTF("OK\n");
  62
  63         buf[cnt] = '\0';
  64         TPRINTF("Read %zu bytes, string \"%s\"\n", cnt, buf);
  65
  66         TPRINTF("Seek to beginning...");
  67         if (fseek(file, 0, SEEK_SET) != 0) {
  68                 TPRINTF("errno = %s\n", str_error_name(errno));
  69                 fclose(file);
  70                 return "Failed seeking in file";
  71         } else
  72                 TPRINTF("OK\n");
  73
  74         TPRINTF("Read using fgetc()...");
  75         while (true) {
  76                 int c = fgetc(file);
  77                 if (c == EOF)
  78                         break;
  79
  80                 TPRINTF(".");
  81         }
  82         TPRINTF("[EOF]\n");
  83
  84         TPRINTF("Close...");
  85         if (fclose(file) != 0) {
  86                 TPRINTF("errno = %s\n", str_error_name(errno));
  87                 return "Failed closing file";
  88         } else
  89                 TPRINTF("OK\n");
  90
  91         return NULL;
  92 }