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/*
* libexplain - Explain errno values returned by libc functions
* Copyright (C) 2008-2011 Peter Miller
* Written by Peter Miller <pmiller@opensource.org.au>
*
* This program 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.
*
* This program 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, see <http://www.gnu.org/licenses/>.
*/
#include <libexplain/ac/stdio.h>
#include <libexplain/ac/stdlib.h>
#include <libexplain/ac/string.h>
#include <libexplain/ac/getopt.h>
#include <libexplain/errno_info.h>
#include <libexplain/errno_info/print.h>
#include <libexplain/exit.h>
#include <libexplain/freopen.h>
#include <libexplain/iocontrol.h>
#include <libexplain/string_buffer.h>
#include <libexplain/version_print.h>
#include <libexplain/wrap_and_print.h>
#include <explain/syscall.h>
static void
usage(void)
{
fprintf(stderr, "Usage: explain -e <errno> <function> [ <args> ... ]\n");
fprintf(stderr, " explain -m <message> <function> [ <args> ... ]\n");
fprintf(stderr, " explain -V\n");
exit(EXIT_FAILURE);
}
#ifdef HAVE_GETOPT_LONG
static const struct option options[] =
{
{ "errno", 1, 0, 'e' },
{ "explain-exit-status", 0, 0, 'E' },
{ "message", 1, 0, 'm' },
{ "print-errno-info", 0, 0, 'P' },
{ "statistics", 0, 0, 's' },
{ "version", 0, 0, 'V' },
{ "check-ioctl-conflicts", 0, 0, 'Z' },
{ 0, 0, 0, 0 }
};
#endif
static int exit_status;
static int
figure_out_error(const char *text)
{
long n;
char *ep;
const explain_errno_info_t *eip;
explain_string_buffer_t sb;
char message[200];
explain_string_buffer_init(&sb, message, sizeof(message));
/* is it a number? */
n = strtol(text, &ep, 0);
if (ep != text && !*ep)
return n;
/* is it a symbol? */
eip = explain_errno_info_by_name(text);
if (eip)
return eip->error_number;
/* is it an exact text? */
eip = explain_errno_info_by_text(text);
if (eip)
return eip->error_number;
/* is it a fuzzy symbol? */
eip = explain_errno_info_by_name_fuzzy(text);
if (eip)
{
explain_string_buffer_puts(&sb, "the error ");
explain_string_buffer_puts_quoted(&sb, text);
explain_string_buffer_puts
(
&sb,
" doesn't match any known symbol, closest is the "
);
explain_string_buffer_puts_quoted(&sb, eip->name);
explain_string_buffer_puts(&sb, " symbol");
explain_wrap_and_print(stderr, message);
exit_status = EXIT_FAILURE;
exit(EXIT_FAILURE);
/* NOTREACHED */
return eip->error_number;
}
/* is it a fuzzy text? */
eip = explain_errno_info_by_text_fuzzy(text);
if (eip)
{
explain_string_buffer_puts(&sb, "the error ");
explain_string_buffer_puts_quoted(&sb, text);
explain_string_buffer_puts
(
&sb,
" doesn't match any known symbol, closest is the "
);
explain_string_buffer_puts_quoted
(
&sb,
explain_internal_strerror(eip->error_number)
);
explain_string_buffer_puts(&sb, " message");
explain_wrap_and_print(stderr, message);
exit_status = EXIT_FAILURE;
exit(EXIT_FAILURE);
/* NOTREACHED */
return eip->error_number;
}
explain_string_buffer_puts(&sb, "the error ");
explain_string_buffer_puts_quoted(&sb, text);
explain_string_buffer_puts
(
&sb,
" doesn't look like a number, or an error symbol, or a "
"strerror() string, aborting"
);
explain_wrap_and_print(stderr, message);
exit(EXIT_FAILURE);
/* NOTREACHED */
return 0;
}
static void
print_statistics(void)
{
int syscall_total;
int ioctl_total;
int ioctl_active;
syscall_statistics(&syscall_total);
printf("Coverage includes %d system calls ", syscall_total);
explain_iocontrol_statistics(&ioctl_total, &ioctl_active);
printf("and %d ioctl requests.\n", ioctl_total);
if (ioctl_active < ioctl_total)
printf(".\\\" only %d ioctls relevant to this system\n", ioctl_active);
}
int
main(int argc, char **argv)
{
func_t func;
int err;
exit_status = EXIT_SUCCESS;
err = -1;
for (;;)
{
#ifdef HAVE_GETOPT_LONG
int c = getopt_long(argc, argv, "Ee:o:PpsVZ", options, 0);
#else
int c = getopt(argc, argv, "Ee:o:PpsVZ");
#endif
if (c == EOF)
break;
switch (c)
{
case 'E':
explain_exit_on_exit();
break;
case 'e':
err = figure_out_error(optarg);
break;
case 'o':
explain_freopen_or_die(optarg, "w", stdout);
break;
case 'p':
explain_errno_info_print(0);
return 0;
case 'P':
explain_errno_info_print(1);
return 0;
case 's':
print_statistics();
return 0;
case 'V':
explain_version_print();
return 0;
case 'Z':
explain_iocontrol_check_conflicts();
return 0;
default:
usage();
/* NOTREACHED */
}
}
if (err < 0)
{
fprintf(stderr, "please specify an error number (-e)\n");
exit(EXIT_FAILURE);
}
if (optind >= argc)
usage();
func = find_function(argv[optind]);
++optind;
func(err, argc - optind, argv + optind);
return exit_status;
}
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