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/*
* errno.c - Builtin functions to map errno values.
*/
/*
* Copyright (C) 2013 the Free Software Foundation, Inc.
*
* This file is part of GAWK, the GNU implementation of the
* AWK Programming Language.
*
* GAWK is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* GAWK is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <assert.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "gawkapi.h"
#include "gettext.h"
#define _(msgid) gettext(msgid)
#define N_(msgid) msgid
static const gawk_api_t *api; /* for convenience macros to work */
static awk_ext_id_t *ext_id;
static const char *ext_version = "errno extension: version 1.0";
static awk_bool_t (*init_func)(void) = NULL;
int plugin_is_GPL_compatible;
static const char *const errno2name[] = {
#define init_errno(A, B) [A] = B,
#include "errlist.h"
#undef init_errno
};
#define NUMERR sizeof(errno2name)/sizeof(errno2name[0])
/* do_strerror --- call strerror */
static awk_value_t *
do_strerror(int nargs, awk_value_t *result)
{
awk_value_t errnum;
if (do_lint && nargs > 1)
lintwarn(ext_id, _("strerror: called with too many arguments"));
if (get_argument(0, AWK_NUMBER, & errnum)) {
const char *str = gettext(strerror(errnum.num_value));
return make_const_string(str, strlen(str), result);
}
if (do_lint) {
if (nargs == 0)
lintwarn(ext_id, _("strerror: called with no arguments"));
else
lintwarn(ext_id, _("strerror: called with inappropriate argument(s)"));
}
return make_null_string(result);
}
/* do_errno2name --- convert an integer errno value to it's symbolic name */
static awk_value_t *
do_errno2name(int nargs, awk_value_t *result)
{
awk_value_t errnum;
if (do_lint && nargs > 1)
lintwarn(ext_id, _("errno2name: called with too many arguments"));
if (get_argument(0, AWK_NUMBER, & errnum)) {
int i = errnum.num_value;
if ((i == errnum.num_value) && (i >= 0) && ((size_t)i < NUMERR) && errno2name[i])
return make_const_string(errno2name[i], strlen(errno2name[i]), result);
warning(ext_id, _("errno2name: called with invalid argument"));
} else if (do_lint) {
if (nargs == 0)
lintwarn(ext_id, _("errno2name: called with no arguments"));
else
lintwarn(ext_id, _("errno2name: called with inappropriate argument(s)"));
}
return make_null_string(result);
}
/* do_name2errno --- convert a symbolic errno name to an integer */
static awk_value_t *
do_name2errno(int nargs, awk_value_t *result)
{
awk_value_t err;
if (do_lint && nargs > 1)
lintwarn(ext_id, _("name2errno: called with too many arguments"));
if (get_argument(0, AWK_STRING, & err)) {
size_t i;
for (i = 0; i < NUMERR; i++) {
if (errno2name[i] && ! strcasecmp(err.str_value.str, errno2name[i]))
return make_number(i, result);
}
warning(ext_id, _("name2errno: called with invalid argument"));
} else if (do_lint) {
if (nargs == 0)
lintwarn(ext_id, _("name2errno: called with no arguments"));
else
lintwarn(ext_id, _("name2errno: called with inappropriate argument(s)"));
}
return make_number(-1, result);
}
static awk_ext_func_t func_table[] = {
{ "strerror", do_strerror, 1 },
{ "errno2name", do_errno2name, 1 },
{ "name2errno", do_name2errno, 1 },
};
/* define the dl_load function using the boilerplate macro */
dl_load_func(func_table, errno, "")
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