File: [local] / src / usr.bin / file / magic-common.c (download)
Revision 1.1, Fri Apr 24 16:24:11 2015 UTC (9 years, 1 month ago) by nicm
Branch: MAIN
CVS Tags: OPENBSD_5_8_BASE, OPENBSD_5_8
New implementation of the file(1) utility. This is a simplified,
modernised version with a nearly complete magic(5) parser but omits some
of the complex builtin tests (notably ELF) and has a reduced set of
options.
ok deraadt
|
/* $OpenBSD: magic-common.c,v 1.1 2015/04/24 16:24:11 nicm Exp $ */
/*
* Copyright (c) 2015 Nicholas Marriott <nicm@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "magic.h"
char *
magic_strtoull(const char *s, uint64_t *u)
{
char *endptr;
if (*s == '-')
return (NULL);
errno = 0;
*u = strtoull(s, &endptr, 0);
if (*s == '\0')
return (NULL);
if (errno == ERANGE && *u == ULLONG_MAX)
return (NULL);
if (*endptr == 'L')
endptr++;
return (endptr);
}
char *
magic_strtoll(const char *s, int64_t *i)
{
char *endptr;
errno = 0;
*i = strtoll(s, &endptr, 0);
if (*s == '\0')
return (NULL);
if (errno == ERANGE && *i == LLONG_MAX)
return (NULL);
if (*endptr == 'L')
endptr++;
return (endptr);
}
void
magic_warn(struct magic_line *ml, const char *fmt, ...)
{
va_list ap;
char *msg;
if (!ml->root->warnings)
return;
va_start(ap, fmt);
if (vasprintf(&msg, fmt, ap) == -1) {
va_end(ap);
return;
}
va_end(ap);
fprintf(stderr, "%s:%u: %s\n", ml->root->path, ml->line, msg);
free(msg);
}