sandboxed-api/sandboxed_api/examples/sum/sum.c

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// Copyright 2019 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <stdio.h>
#include <stdlib.h>
#include <sys/ptrace.h>
#include <unistd.h>
int sumsymbol = 5;
typedef struct sum_params_s {
int a;
int b;
int ret;
} sum_params;
extern int ftest(FILE *f) {
return f->_offset;
}
extern int sum(int a, int b) {
return a + b;
}
extern void sums(sum_params* params) {
params->ret = params->a + params->b;
}
extern long double addf(float a, double b, long double c) {
return a + b + c;
}
extern int sub(int a, int b) {
return a - b;
}
extern int mul(int a, int b) {
return a * b;
}
extern int divs(int a, int b) {
return a / b;
}
extern double muld(double a, float b) {
return a * b;
}
extern void crash(void) {
void(*die)() = (void(*)())(0x0000dead);
die();
}
extern void violate(void) {
// Issue a PTRACE_CONT that will always fail, since we are not in stopped
// state. The actual call should be caught by the sandbox policy.
ptrace(PTRACE_CONT, 0, NULL, NULL);
}
extern int sumarr(int* input, size_t nelem) {
int s = 0, i;
for (i = 0; i < nelem; i++) {
s += input[i];
}
return s;
}
extern void testptr(void *ptr) {
if (ptr) {
puts("Is Not a NULL-ptr");
} else {
puts("Is a NULL-ptr");
}
}
extern int read_int(int fd) {
char buf[10] = {0};
int ret = read(fd, buf, sizeof(buf) - 1);
if(ret > 0) {
ret = atoi(buf);
}
return ret;
}
extern void sleep_for_sec(int sec) {
sleep(sec);
}