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/*
* Copyright (C) Max Romanov
* Copyright (C) NGINX, Inc.
*/
#include <nxt_main.h>
#include <nxt_router.h>
#include <nxt_unit.h>
static nxt_int_t nxt_external_start(nxt_task_t *task, nxt_process_data_t *data);
nxt_app_module_t nxt_external_module = {
0,
NULL,
nxt_string("external"),
"*",
NULL,
0,
NULL,
nxt_external_start,
};
extern char **environ;
nxt_inline nxt_int_t
nxt_external_fd_no_cloexec(nxt_task_t *task, nxt_socket_t fd)
{
int res, flags;
if (fd == -1) {
return NXT_OK;
}
flags = fcntl(fd, F_GETFD);
if (nxt_slow_path(flags == -1)) {
nxt_alert(task, "fcntl(%d, F_GETFD) failed %E", fd, nxt_errno);
return NXT_ERROR;
}
flags &= ~FD_CLOEXEC;
res = fcntl(fd, F_SETFD, flags);
if (nxt_slow_path(res == -1)) {
nxt_alert(task, "fcntl(%d, F_SETFD) failed %E", fd, nxt_errno);
return NXT_ERROR;
}
return NXT_OK;
}
static nxt_int_t
nxt_external_start(nxt_task_t *task, nxt_process_data_t *data)
{
char **argv;
u_char buf[256];
u_char *p, *end;
uint32_t index;
size_t size;
nxt_str_t str;
nxt_int_t rc;
nxt_uint_t i, argc;
nxt_port_t *my_port, *proto_port, *router_port;
nxt_runtime_t *rt;
nxt_conf_value_t *value;
nxt_common_app_conf_t *conf;
nxt_external_app_conf_t *c;
rt = task->thread->runtime;
conf = data->app;
proto_port = rt->port_by_type[NXT_PROCESS_PROTOTYPE];
router_port = rt->port_by_type[NXT_PROCESS_ROUTER];
my_port = nxt_runtime_port_find(rt, nxt_pid, 0);
if (nxt_slow_path(proto_port == NULL || my_port == NULL
|| router_port == NULL))
{
return NXT_ERROR;
}
rc = nxt_external_fd_no_cloexec(task, proto_port->pair[1]);
if (nxt_slow_path(rc != NXT_OK)) {
return NXT_ERROR;
}
rc = nxt_external_fd_no_cloexec(task, router_port->pair[1]);
if (nxt_slow_path(rc != NXT_OK)) {
return NXT_ERROR;
}
rc = nxt_external_fd_no_cloexec(task, my_port->pair[0]);
if (nxt_slow_path(rc != NXT_OK)) {
return NXT_ERROR;
}
rc = nxt_external_fd_no_cloexec(task, my_port->pair[1]);
if (nxt_slow_path(rc != NXT_OK)) {
return NXT_ERROR;
}
end = buf + sizeof(buf);
p = nxt_sprintf(buf, end,
"%s;%uD;"
"%PI,%ud,%d;"
"%PI,%ud,%d;"
"%PI,%ud,%d,%d;"
"%d,%z,%uD,%Z",
NXT_VERSION, my_port->process->stream,
proto_port->pid, proto_port->id, proto_port->pair[1],
router_port->pid, router_port->id, router_port->pair[1],
my_port->pid, my_port->id, my_port->pair[0],
my_port->pair[1],
2, conf->shm_limit, conf->request_limit);
if (nxt_slow_path(p == end)) {
nxt_alert(task, "internal error: buffer too small for NXT_UNIT_INIT");
return NXT_ERROR;
}
nxt_debug(task, "update "NXT_UNIT_INIT_ENV"=%s", buf);
rc = setenv(NXT_UNIT_INIT_ENV, (char *) buf, 1);
if (nxt_slow_path(rc == -1)) {
nxt_alert(task, "setenv("NXT_UNIT_INIT_ENV", %s) failed %E", buf,
nxt_errno);
return NXT_ERROR;
}
c = &conf->u.external;
argc = 2;
size = 0;
if (c->arguments != NULL) {
for (index = 0; /* void */ ; index++) {
value = nxt_conf_get_array_element(c->arguments, index);
if (value == NULL) {
break;
}
nxt_conf_get_string(value, &str);
size += str.length + 1;
argc++;
}
}
argv = nxt_malloc(argc * sizeof(argv[0]) + size);
if (nxt_slow_path(argv == NULL)) {
nxt_alert(task, "failed to allocate arguments");
return NXT_ERROR;
}
argv[0] = c->executable;
i = 1;
if (c->arguments != NULL) {
p = (u_char *) &argv[argc];
for (index = 0; /* void */ ; index++) {
value = nxt_conf_get_array_element(c->arguments, index);
if (value == NULL) {
break;
}
argv[i++] = (char *) p;
nxt_conf_get_string(value, &str);
p = nxt_cpymem(p, str.start, str.length);
*p++ = '\0';
}
}
argv[i] = NULL;
(void) execve(c->executable, argv, environ);
nxt_alert(task, "execve(%s) failed %E", c->executable, nxt_errno);
nxt_free(argv);
return NXT_ERROR;
}
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