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#include <stdio.h>
#include <unistd.h>
#include <stdint.h>
#include <sys/types.h>
/* This is an example target for defork.c - fuzz using
```
mkdir in; echo a > ./in/a
AFL_PRELOAD=./defork64.so ../../afl-fuzz -i in -o out -- ./forking_target @@
```
*/
int main(int argc, char **argv) {
if (argc < 2) {
printf("Example tool to test defork.\nUsage ./forking_target <input>\n");
return -1;
}
pid_t pid = fork();
if (pid == 0) {
printf("We're in the child.\n");
FILE *f = fopen(argv[1], "r");
char buf[4096];
fread(buf, 1, 4096, f);
fclose(f);
uint32_t offset = buf[100] + (buf[101] << 8);
char test_val = buf[offset];
return test_val < 100;
} else if (pid < 0) {
perror("fork");
return -1;
} else {
printf("We are in the parent - defork didn't work! :( (pid=%d)\n",
(int)pid);
}
return 0;
}
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