usr/src/test/libc-tests/tests/strerror/strerror.c

   1 /*
   2  * This file and its contents are supplied under the terms of the
   3  * Common Development and Distribution License ("CDDL"), version 1.0.
   4  * You may only use this file in accordance with the terms of version
   5  * 1.0 of the CDDL.
   6  *
   7  * A full copy of the text of the CDDL should have accompanied this
   8  * source.  A copy of the CDDL is also available via the Internet at
   9  * http://www.illumos.org/license/CDDL.
  10  */
  11
  12 /*
  13  * Copyright 2015 Joyent, Inc.
  14  */
  15
  16 #include <string.h>
  17 #include <locale.h>
  18 #include <assert.h>
  19 #include <errno.h>
  20 #include <stdio.h>
  21
  22 /*
  23  * This is designed to test strerorr and strerror_l's ability to react properly
  24  * to being in various locales. This also serves as a regression test for
  25  * illumos#6133.
  26  *
  27  * For this test, we utilize the poorly named 'zz_AA.UTF_8' locale which
  28  * was created because it actually has a translation! It 'translates'
  29  * the string:
  30  *
  31  * "No such file or directory" -> "It's a trap!"
  32  *
  33  * It's otherwise a boring en_US.UTF-8 locale under the hood.
  34  *
  35  * We explicitly want to verify the following cases:
  36  *
  37  * + strerror() honors the global locale before uselocale
  38  * + strerror() honors the per-thread locale
  39  * + strerror_l() always reflects the chosen locale
  40  */
  41
  42 static int err = ENOENT;
  43 static const char *en = "No such file or directory";
  44 static const char *trans = "It's a trap!";
  45
  46 static void
  47 strerror_verify(const char *exp)
  48 {
  49         const char *r;
  50         errno = 0;
  51         r = strerror(err);
  52         assert(errno == 0);
  53         assert(strcmp(r, exp) == 0);
  54 }
  55
  56 static void
  57 strerror_l_verify(locale_t loc, const char *exp)
  58 {
  59         const char *r;
  60         errno = 0;
  61         r = strerror_l(err, loc);
  62         assert(errno == 0);
  63         assert(strcmp(r, exp) == 0);
  64 }
  65
  66 int
  67 main(void)
  68 {
  69         locale_t loc;
  70
  71         (void) setlocale(LC_ALL, "C");
  72         strerror_verify(en);
  73
  74         (void) setlocale(LC_ALL, "zz_AA.UTF-8");
  75         strerror_verify(trans);
  76
  77         (void) setlocale(LC_MESSAGES, "C");
  78         strerror_verify(en);
  79
  80         (void) setlocale(LC_ALL, "C");
  81         loc = newlocale(LC_MESSAGES_MASK, "zz_AA.UTF-8", NULL);
  82         assert(loc != NULL);
  83
  84         strerror_verify(en);
  85         strerror_l_verify(NULL, en);
  86         strerror_l_verify(loc, trans);
  87
  88         (void) uselocale(loc);
  89         strerror_verify(trans);
  90         strerror_l_verify(NULL, trans);
  91         strerror_l_verify(loc, trans);
  92
  93         (void) uselocale(LC_GLOBAL_LOCALE);
  94         strerror_verify(en);
  95         strerror_l_verify(NULL, en);
  96         strerror_l_verify(loc, trans);
  97
  98         freelocale(loc);
  99         return (0);
 100 }