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/* $OpenBSD: systrace-translate.c,v 1.9 2002/07/30 06:07:06 itojun Exp $ */
/*
* Copyright 2002 Niels Provos <provos@citi.umich.edu>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Niels Provos.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/tree.h>
#include <inttypes.h>
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
#include <pwd.h>
#include <err.h>
#include "../../sys/compat/linux/linux_types.h"
#include "../../sys/compat/linux/linux_fcntl.h"
#include "intercept.h"
#include "systrace.h"
#define FL(w,c) do { \
if (flags & (w)) \
*p++ = (c); \
} while (0)
static int print_oflags(char *, size_t, struct intercept_translate *);
static int linux_print_oflags(char *, size_t, struct intercept_translate *);
static int print_modeflags(char *, size_t, struct intercept_translate *);
static int print_number(char *, size_t, struct intercept_translate *);
static int print_uname(char *, size_t, struct intercept_translate *);
static int print_uname(char *, size_t, struct intercept_translate *);
static int get_argv(struct intercept_translate *, int, pid_t, void *);
static int print_argv(char *, size_t, struct intercept_translate *);
static int
print_oflags(char *buf, size_t buflen, struct intercept_translate *tl)
{
char str[32], *p;
int flags = (intptr_t)tl->trans_addr;
int isread = 0;
p = str;
switch (flags & O_ACCMODE) {
case O_RDONLY:
strcpy(p, "ro");
isread = 1;
break;
case O_WRONLY:
strcpy(p, "wo");
break;
case O_RDWR:
strcpy(p, "rw");
break;
default:
strcpy(p, "--");
break;
}
/* XXX - Open handling of alias */
if (isread)
systrace_switch_alias("native", "open", "native", "fsread");
else
systrace_switch_alias("native", "open", "native", "fswrite");
p += 2;
FL(O_NONBLOCK, 'n');
FL(O_APPEND, 'a');
FL(O_CREAT, 'c');
FL(O_TRUNC, 't');
*p = '\0';
strlcpy(buf, str, buflen);
return (0);
}
static int
linux_print_oflags(char *buf, size_t buflen, struct intercept_translate *tl)
{
char str[32], *p;
int flags = (intptr_t)tl->trans_addr;
int isread = 0;
p = str;
switch (flags & LINUX_O_ACCMODE) {
case LINUX_O_RDONLY:
strcpy(p, "ro");
isread = 1;
break;
case LINUX_O_WRONLY:
strcpy(p, "wo");
break;
case LINUX_O_RDWR:
strcpy(p, "rw");
break;
default:
strcpy(p, "--");
break;
}
/* XXX - Open handling of alias */
if (isread)
systrace_switch_alias("linux", "open", "linux", "fsread");
else
systrace_switch_alias("linux", "open", "linux", "fswrite");
p += 2;
FL(LINUX_O_APPEND, 'a');
FL(LINUX_O_CREAT, 'c');
FL(LINUX_O_TRUNC, 't');
*p = '\0';
strlcpy(buf, str, buflen);
return (0);
}
static int
print_modeflags(char *buf, size_t buflen, struct intercept_translate *tl)
{
int mode = (intptr_t)tl->trans_addr;
mode &= 00007777;
snprintf(buf, buflen, "%o", mode);
return (0);
}
static int
print_number(char *buf, size_t buflen, struct intercept_translate *tl)
{
int number = (intptr_t)tl->trans_addr;
snprintf(buf, buflen, "%d", number);
return (0);
}
static int
print_uname(char *buf, size_t buflen, struct intercept_translate *tl)
{
struct passwd *pw;
uid_t uid = (intptr_t)tl->trans_addr;
pw = getpwuid(uid);
snprintf(buf, buflen, "%s", pw != NULL ? pw->pw_name : "<unknown>");
return (0);
}
static int
get_argv(struct intercept_translate *trans, int fd, pid_t pid, void *addr)
{
char *arg;
char buf[_POSIX2_LINE_MAX], *p;
int i, off = 0, len;
extern struct intercept_system intercept;
buf[0] = '\0';
while (1) {
if (intercept.io(fd, pid, INTERCEPT_READ, (char *)addr + off,
(void *)&arg, sizeof(char *)) == -1) {
warn("%s: ioctl", __func__);
return (NULL);
}
if (arg == NULL)
break;
p = intercept_get_string(fd, pid, arg);
if (p == NULL)
return (-1);
if (i > 0)
strlcat(buf, " ", sizeof(buf));
strlcat(buf, p, sizeof(buf));
off += sizeof(char *);
}
len = strlen(buf) + 1;
trans->trans_data = malloc(len);
if (trans->trans_data == NULL)
return (-1);
/* XXX - No argument replacement */
trans->trans_size = 0;
memcpy(trans->trans_data, buf, len);
return (0);
}
static int
print_argv(char *buf, size_t buflen, struct intercept_translate *tl)
{
snprintf(buf, buflen, "%s", (char *)tl->trans_data);
return (0);
}
struct intercept_translate trargv = {
"argv",
get_argv, print_argv,
};
struct intercept_translate oflags = {
"oflags",
NULL, print_oflags,
};
struct intercept_translate linux_oflags = {
"oflags",
NULL, linux_print_oflags,
};
struct intercept_translate modeflags = {
"mode",
NULL, print_modeflags,
};
struct intercept_translate uidt = {
"uid",
NULL, print_number,
};
struct intercept_translate uname = {
"uname",
NULL, print_uname,
};
struct intercept_translate gidt = {
"gid",
NULL, print_number,
};
struct intercept_translate fdt = {
"fd",
NULL, print_number,
};
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