diff options
Diffstat (limited to 'include/ac/errno.h')
| -rw-r--r-- | include/ac/errno.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/include/ac/errno.h b/include/ac/errno.h new file mode 100644 index 0000000..e712b2e --- /dev/null +++ b/include/ac/errno.h @@ -0,0 +1,55 @@ +/* Generic errno.h */ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 1998-2021 The OpenLDAP Foundation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * <http://www.OpenLDAP.org/license.html>. + */ + +#ifndef _AC_ERRNO_H +#define _AC_ERRNO_H + +#if defined( HAVE_ERRNO_H ) +# include <errno.h> +#elif defined( HAVE_SYS_ERRNO_H ) +# include <sys/errno.h> +#endif + +#ifndef HAVE_SYS_ERRLIST + /* no sys_errlist */ +# define sys_nerr 0 +# define sys_errlist ((char **)0) +#elif defined( DECL_SYS_ERRLIST ) + /* have sys_errlist but need declaration */ + LDAP_LIBC_V(int) sys_nerr; + LDAP_LIBC_V(char) *sys_errlist[]; +#endif + +#undef _AC_ERRNO_UNKNOWN +#define _AC_ERRNO_UNKNOWN "unknown error" + +#ifdef HAVE_SYS_ERRLIST + /* this is thread safe */ +# define STRERROR(e) ( (e) > -1 && (e) < sys_nerr \ + ? sys_errlist[(e)] : _AC_ERRNO_UNKNOWN ) + +#elif defined( HAVE_STRERROR ) + /* this may not be thread safe */ + /* and, yes, some implementations of strerror may return NULL */ +# define STRERROR(e) ( strerror(e) \ + ? strerror(e) : _AC_ERRNO_UNKNOWN ) + +#else + /* this is thread safe */ +# define STRERROR(e) ( _AC_ERRNO_UNKNOWN ) +#endif + +#endif /* _AC_ERRNO_H */ |