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quissh_nif.c
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quissh_nif.c
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#include <unistd.h>
#include "erl_nif.h"
static ERL_NIF_TERM exec_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{
unsigned path_length, args_count, arg_length;
ERL_NIF_TERM head, tail;
int i = 0;
enif_get_list_length(env, argv[0], &path_length);
enif_get_list_length(env, argv[1], &args_count);
char* exec_argv[args_count + 2];
char path[path_length + 1];
if (!enif_get_string(env, argv[0], path, path_length + 1, ERL_NIF_LATIN1) || !enif_is_list(env, argv[1])) {
return enif_make_badarg(env);
}
tail = argv[1];
while(enif_get_list_cell(env, tail, &head, &tail) != 0) {
enif_get_list_length(env, head, &arg_length);
char* arg = (char*) malloc(sizeof(char) * (arg_length + 1));
if (!enif_get_string(env, head, arg, arg_length + 1, ERL_NIF_LATIN1)) {
return enif_make_badarg(env);
}
exec_argv[i + 1] = arg;
i++;
}
exec_argv[0] = path;
exec_argv[args_count + 1] = NULL;
execv(path, exec_argv);
return enif_make_atom(env, "ok");
}
static ErlNifFunc nif_funcs[] = {
{"exec", 2, exec_nif}
};
ERL_NIF_INIT(quissh_nif, nif_funcs, NULL, NULL, NULL, NULL);