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#include <sys/wait.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <erl_nif.h>
static int load(ErlNifEnv* env, void** priv_data, ERL_NIF_TERM load_info)
{
return 0;
}
static ERL_NIF_TERM set_alarm(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{
int t;
if (!enif_get_int(env, argv[0], &t)) {
return enif_make_badarg(env);
}
alarm(t);
return enif_make_atom(env, "ok");
}
static ERL_NIF_TERM fork_0(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{
pid_t pid;
pid = fork();
if (pid == 0) {
/* child */
exit(42);
}
return enif_make_tuple(env, 2,
enif_make_atom(env, "ok"),
enif_make_int(env, (int)pid));
}
static ERL_NIF_TERM get_exit_code(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{
int x;
pid_t pid;
if (!enif_get_int(env, argv[0], &x)) {
return enif_make_badarg(env);
}
pid = (pid_t) x;
waitpid(pid, &x, 0);
return enif_make_tuple(env, 2,
enif_make_atom(env, "ok"),
enif_make_int(env, WEXITSTATUS(x)));
}
static ErlNifFunc nif_funcs[] =
{
{"set_alarm", 1, set_alarm},
{"fork", 0, fork_0},
{"get_exit_code", 1, get_exit_code}
};
ERL_NIF_INIT(os_signal_SUITE,nif_funcs,load,NULL,NULL,NULL)
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