1 2 /* 3 * Copyright (C) Max Romanov 4 * Copyright (C) NGINX, Inc. 5 */ 6 7 #include <nxt_main.h> 8 #include <nxt_router.h> 9 #include <nxt_unit.h> 10 11 12 static nxt_int_t nxt_external_start(nxt_task_t *task, nxt_process_data_t *data); 13 14 15 nxt_app_module_t nxt_external_module = { 16 0, 17 NULL, 18 nxt_string("external"), 19 "*", 20 NULL, 21 0, 22 NULL, 23 nxt_external_start, 24 }; 25 26 27 extern char **environ; 28 29 30 nxt_inline nxt_int_t 31 nxt_external_fd_no_cloexec(nxt_task_t *task, nxt_socket_t fd) 32 { 33 int res, flags; 34 35 if (fd == -1) { 36 return NXT_OK; 37 } 38 39 flags = fcntl(fd, F_GETFD); 40 41 if (nxt_slow_path(flags == -1)) { 42 nxt_alert(task, "fcntl(%d, F_GETFD) failed %E", fd, nxt_errno); 43 return NXT_ERROR; 44 } 45 46 flags &= ~FD_CLOEXEC; 47 48 res = fcntl(fd, F_SETFD, flags); 49 50 if (nxt_slow_path(res == -1)) { 51 nxt_alert(task, "fcntl(%d, F_SETFD) failed %E", fd, nxt_errno); 52 return NXT_ERROR; 53 } 54 55 return NXT_OK; 56 } 57 58 59 static nxt_int_t 60 nxt_external_start(nxt_task_t *task, nxt_process_data_t *data) 61 { 62 char **argv; 63 u_char buf[256]; 64 u_char *p, *end; 65 uint32_t index; 66 size_t size; 67 nxt_str_t str; 68 nxt_int_t rc; 69 nxt_uint_t i, argc; 70 nxt_port_t *my_port, *main_port, *router_port; 71 nxt_runtime_t *rt; 72 nxt_conf_value_t *value; 73 nxt_common_app_conf_t *conf; 74 nxt_external_app_conf_t *c; 75 76 rt = task->thread->runtime; 77 conf = data->app; 78 79 main_port = rt->port_by_type[NXT_PROCESS_MAIN]; 80 router_port = rt->port_by_type[NXT_PROCESS_ROUTER]; 81 my_port = nxt_runtime_port_find(rt, nxt_pid, 0); 82 83 if (nxt_slow_path(main_port == NULL || my_port == NULL 84 || router_port == NULL)) 85 { 86 return NXT_ERROR; 87 } 88 89 rc = nxt_external_fd_no_cloexec(task, main_port->pair[1]); 90 if (nxt_slow_path(rc != NXT_OK)) { 91 return NXT_ERROR; 92 } 93 94 rc = nxt_external_fd_no_cloexec(task, router_port->pair[1]); 95 if (nxt_slow_path(rc != NXT_OK)) { 96 return NXT_ERROR; 97 } 98 99 rc = nxt_external_fd_no_cloexec(task, my_port->pair[0]); 100 if (nxt_slow_path(rc != NXT_OK)) { 101 return NXT_ERROR; 102 } 103 104 rc = nxt_external_fd_no_cloexec(task, my_port->pair[1]); 105 if (nxt_slow_path(rc != NXT_OK)) { 106 return NXT_ERROR; 107 } 108 109 end = buf + sizeof(buf); 110 111 p = nxt_sprintf(buf, end, 112 "%s;%uD;" 113 "%PI,%ud,%d;" 114 "%PI,%ud,%d;" 115 "%PI,%ud,%d,%d;" 116 "%d,%z,%uD,%Z", 117 NXT_VERSION, my_port->process->stream, 118 main_port->pid, main_port->id, main_port->pair[1], 119 router_port->pid, router_port->id, router_port->pair[1], 120 my_port->pid, my_port->id, my_port->pair[0], 121 my_port->pair[1], 122 2, conf->shm_limit, conf->request_limit); 123 124 if (nxt_slow_path(p == end)) { 125 nxt_alert(task, "internal error: buffer too small for NXT_UNIT_INIT"); 126 127 return NXT_ERROR; 128 } 129 130 nxt_debug(task, "update "NXT_UNIT_INIT_ENV"=%s", buf); 131 132 rc = setenv(NXT_UNIT_INIT_ENV, (char *) buf, 1); 133 if (nxt_slow_path(rc == -1)) { 134 nxt_alert(task, "setenv("NXT_UNIT_INIT_ENV", %s) failed %E", buf, 135 nxt_errno); 136 137 return NXT_ERROR; 138 } 139 140 c = &conf->u.external; 141 142 argc = 2; 143 size = 0; 144 145 if (c->arguments != NULL) { 146 147 for (index = 0; /* void */ ; index++) { 148 value = nxt_conf_get_array_element(c->arguments, index); 149 if (value == NULL) { 150 break; 151 } 152 153 nxt_conf_get_string(value, &str); 154 155 size += str.length + 1; 156 argc++; 157 } 158 } 159 160 argv = nxt_malloc(argc * sizeof(argv[0]) + size); 161 if (nxt_slow_path(argv == NULL)) { 162 nxt_alert(task, "failed to allocate arguments"); 163 return NXT_ERROR; 164 } 165 166 argv[0] = c->executable; 167 i = 1; 168 169 if (c->arguments != NULL) { 170 p = (u_char *) &argv[argc]; 171 172 for (index = 0; /* void */ ; index++) { 173 value = nxt_conf_get_array_element(c->arguments, index); 174 if (value == NULL) { 175 break; 176 } 177 178 argv[i++] = (char *) p; 179 180 nxt_conf_get_string(value, &str); 181 182 p = nxt_cpymem(p, str.start, str.length); 183 *p++ = '\0'; 184 } 185 } 186 187 argv[i] = NULL; 188 189 (void) execve(c->executable, argv, environ); 190 191 nxt_alert(task, "execve(%s) failed %E", c->executable, nxt_errno); 192 193 nxt_free(argv); 194 195 return NXT_ERROR; 196 } 197