stdio-common/tst-unlockedio.c

   1 /* Test for some *_unlocked stdio interfaces.
   2    Copyright (C) 2004-2013 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Jakub Jelinek <jakub@redhat.com>, 2004.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <stdlib.h>
  21 #include <stdio.h>
  22 #include <string.h>
  23
  24 int fd;
  25 static void do_prepare (void);
  26 static int do_test (void);
  27 #define PREPARE(argc, argv) do_prepare ()
  28 #define TEST_FUNCTION do_test ()
  29 #include "../test-skeleton.c"
  30
  31 static int
  32 do_test (void)
  33 {
  34   const char blah[] = "BLAH";
  35   char buf[strlen (blah) + 1];
  36   FILE *fp, *f;
  37   const char *cp;
  38   char *wp;
  39
  40   if ((fp = fdopen (fd, "w+")) == NULL)
  41     exit (1);
  42
  43   flockfile (fp);
  44
  45   f = fp;
  46   cp = blah;
  47   if (ftello (fp) != 0
  48       || fwrite_unlocked (blah, blah - blah, strlen (blah), f++) != 0
  49       || f != fp + 1
  50       || fwrite_unlocked ("", 5.0, 0, --f) != 0
  51       || f != fp
  52       || fwrite_unlocked (cp++, 16, 0.25, fp) != 0
  53       || cp != blah + 1
  54       || fwrite_unlocked (--cp, 0.25, 16, fp) != 0
  55       || cp != blah
  56       || fwrite_unlocked (blah, 0, -0.0, fp) != 0
  57       || ftello (fp) != 0)
  58     {
  59       puts ("One of fwrite_unlocked tests failed");
  60       exit (1);
  61     }
  62
  63   if (fwrite_unlocked (blah, 1, strlen (blah) - 2, fp) != strlen (blah) - 2)
  64     {
  65       puts ("Could not write string into file");
  66       exit (1);
  67     }
  68
  69   if (putc_unlocked ('A' + 0x1000000, fp) != 'A')
  70     {
  71       puts ("putc_unlocked failed");
  72       exit (1);
  73     }
  74
  75   f = fp;
  76   cp = blah + strlen (blah) - 1;
  77   if (putc_unlocked (*cp++, f++) != 'H'
  78       || f != fp + 1
  79       || cp != strchr (blah, '\0'))
  80     {
  81       puts ("fputc_unlocked failed");
  82       exit (1);
  83     }
  84
  85   if (ftello (fp) != (off_t) strlen (blah))
  86     {
  87       printf ("Failed to write %zd bytes to temporary file", strlen (blah));
  88       exit (1);
  89     }
  90
  91   rewind (fp);
  92
  93   f = fp;
  94   wp = buf;
  95   memset (buf, ' ', sizeof (buf));
  96   if (ftello (fp) != 0
  97       || fread_unlocked (buf, buf - buf, strlen (blah), f++) != 0
  98       || f != fp + 1
  99       || fread_unlocked (buf, 5.0, 0, --f) != 0
 100       || f != fp
 101       || fread_unlocked (wp++, 16, 0.25, fp) != 0
 102       || wp != buf + 1
 103       || fread_unlocked (--wp, 0.25, 16, fp) != 0
 104       || wp != buf
 105       || fread_unlocked (buf, 0, -0.0, fp) != 0
 106       || ftello (fp) != 0
 107       || memcmp (buf, "     ", sizeof (buf)) != 0)
 108     {
 109       puts ("One of fread_unlocked tests failed");
 110       exit (1);
 111     }
 112
 113   if (fread_unlocked (buf, 1, strlen (blah) - 2, fp) != strlen (blah) - 2)
 114     {
 115       puts ("Could not read string from file");
 116       exit (1);
 117     }
 118
 119   if (getc_unlocked (fp) != 'A')
 120     {
 121       puts ("getc_unlocked failed");
 122       exit (1);
 123     }
 124
 125   f = fp;
 126   if (fgetc_unlocked (f++) != 'H'
 127       || f != fp + 1
 128       || fgetc_unlocked (--f) != EOF
 129       || f != fp)
 130     {
 131       puts ("fgetc_unlocked failed");
 132       exit (1);
 133     }
 134
 135   if (ftello (fp) != (off_t) strlen (blah))
 136     {
 137       printf ("Failed to read %zd bytes from temporary file", strlen (blah));
 138       exit (1);
 139     }
 140
 141   funlockfile (fp);
 142   fclose (fp);
 143
 144   return 0;
 145 }
 146
 147 static void
 148 do_prepare (void)
 149 {
 150   fd = create_temp_file ("tst-unlockedio.", NULL);
 151   if (fd == -1)
 152     {
 153       printf ("cannot create temporary file: %m\n");
 154       exit (1);
 155     }
 156 }