tests/test-errno.c

   1 /* Test of <errno.h> substitute.
   2    Copyright (C) 2008-2024 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
  18
  19 #include <config.h>
  20
  21 #include <errno.h>
  22
  23 /* Verify that the POSIX mandated errno values exist and can be used as
  24    initializers outside of a function.
  25    The variable names happen to match the Linux/x86 error numbers.  */
  26 int e1 = EPERM;
  27 int e2 = ENOENT;
  28 int e3 = ESRCH;
  29 int e4 = EINTR;
  30 int e5 = EIO;
  31 int e6 = ENXIO;
  32 int e7 = E2BIG;
  33 int e8 = ENOEXEC;
  34 int e9 = EBADF;
  35 int e10 = ECHILD;
  36 int e11 = EAGAIN;
  37 int e11a = EWOULDBLOCK;
  38 int e12 = ENOMEM;
  39 int e13 = EACCES;
  40 int e14 = EFAULT;
  41 int e16 = EBUSY;
  42 int e17 = EEXIST;
  43 int e18 = EXDEV;
  44 int e19 = ENODEV;
  45 int e20 = ENOTDIR;
  46 int e21 = EISDIR;
  47 int e22 = EINVAL;
  48 int e23 = ENFILE;
  49 int e24 = EMFILE;
  50 int e25 = ENOTTY;
  51 int e26 = ETXTBSY;
  52 int e27 = EFBIG;
  53 int e28 = ENOSPC;
  54 int e29 = ESPIPE;
  55 int e30 = EROFS;
  56 int e31 = EMLINK;
  57 int e32 = EPIPE;
  58 int e33 = EDOM;
  59 int e34 = ERANGE;
  60 int e35 = EDEADLK;
  61 int e36 = ENAMETOOLONG;
  62 int e37 = ENOLCK;
  63 int e38 = ENOSYS;
  64 int e39 = ENOTEMPTY;
  65 int e40 = ELOOP;
  66 int e42 = ENOMSG;
  67 int e43 = EIDRM;
  68 int e67 = ENOLINK;
  69 int e71 = EPROTO;
  70 int e72 = EMULTIHOP;
  71 int e74 = EBADMSG;
  72 int e75 = EOVERFLOW;
  73 int e84 = EILSEQ;
  74 int e88 = ENOTSOCK;
  75 int e89 = EDESTADDRREQ;
  76 int e90 = EMSGSIZE;
  77 int e91 = EPROTOTYPE;
  78 int e92 = ENOPROTOOPT;
  79 int e93 = EPROTONOSUPPORT;
  80 int e95 = EOPNOTSUPP;
  81 int e95a = ENOTSUP;
  82 int e97 = EAFNOSUPPORT;
  83 int e98 = EADDRINUSE;
  84 int e99 = EADDRNOTAVAIL;
  85 int e100 = ENETDOWN;
  86 int e101 = ENETUNREACH;
  87 int e102 = ENETRESET;
  88 int e103 = ECONNABORTED;
  89 int e104 = ECONNRESET;
  90 int e105 = ENOBUFS;
  91 int e106 = EISCONN;
  92 int e107 = ENOTCONN;
  93 int e110 = ETIMEDOUT;
  94 int e111 = ECONNREFUSED;
  95 int e113 = EHOSTUNREACH;
  96 int e114 = EALREADY;
  97 int e115 = EINPROGRESS;
  98 int e116 = ESTALE;
  99 int e122 = EDQUOT;
 100 int e125 = ECANCELED;
 101 int e130 = EOWNERDEAD;
 102 int e131 = ENOTRECOVERABLE;
 103
 104 /* Don't verify that these errno values are all different, except for possibly
 105    EWOULDBLOCK == EAGAIN.  Even Linux/x86 does not pass this check: it has
 106    ENOTSUP == EOPNOTSUPP.  */
 107
 108 int
 109 main ()
 110 {
 111   /* Verify that errno can be assigned.  */
 112   errno = EOVERFLOW;
 113
 114   /* snprintf() callers want to distinguish EINVAL and EOVERFLOW.  */
 115   if (errno == EINVAL)
 116     return 1;
 117
 118   return 0;
 119 }