service/instance.c

   1 /*
   2  * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
   3  * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU Lesser General Public License version 2.1
   7  * as published by the Free Software Foundation
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #define _GNU_SOURCE
  16 #include <sys/resource.h>
  17 #include <sys/types.h>
  18 #include <sys/socket.h>
  19 #include <sys/stat.h>
  20 #include <grp.h>
  21 #include <net/if.h>
  22 #include <unistd.h>
  23 #include <stdint.h>
  24 #include <stdio.h>
  25 #include <fcntl.h>
  26 #include <pwd.h>
  27 #include <libgen.h>
  28 #include <unistd.h>
  29 #define SYSLOG_NAMES
  30 #include <syslog.h>
  31
  32 #include <libubox/md5.h>
  33
  34 #include "../procd.h"
  35
  36 #include "service.h"
  37 #include "instance.h"
  38
  39 #define UJAIL_BIN_PATH "/sbin/ujail"
  40
  41 enum {
  42         INSTANCE_ATTR_COMMAND,
  43         INSTANCE_ATTR_ENV,
  44         INSTANCE_ATTR_DATA,
  45         INSTANCE_ATTR_NETDEV,
  46         INSTANCE_ATTR_FILE,
  47         INSTANCE_ATTR_TRIGGER,
  48         INSTANCE_ATTR_RESPAWN,
  49         INSTANCE_ATTR_NICE,
  50         INSTANCE_ATTR_LIMITS,
  51         INSTANCE_ATTR_WATCH,
  52         INSTANCE_ATTR_ERROR,
  53         INSTANCE_ATTR_USER,
  54         INSTANCE_ATTR_GROUP,
  55         INSTANCE_ATTR_STDOUT,
  56         INSTANCE_ATTR_STDERR,
  57         INSTANCE_ATTR_NO_NEW_PRIVS,
  58         INSTANCE_ATTR_JAIL,
  59         INSTANCE_ATTR_TRACE,
  60         INSTANCE_ATTR_SECCOMP,
  61         INSTANCE_ATTR_PIDFILE,
  62         INSTANCE_ATTR_RELOADSIG,
  63         INSTANCE_ATTR_TERMTIMEOUT,
  64         INSTANCE_ATTR_FACILITY,
  65         INSTANCE_ATTR_EXTROOT,
  66         __INSTANCE_ATTR_MAX
  67 };
  68
  69 static const struct blobmsg_policy instance_attr[__INSTANCE_ATTR_MAX] = {
  70         [INSTANCE_ATTR_COMMAND] = { "command", BLOBMSG_TYPE_ARRAY },
  71         [INSTANCE_ATTR_ENV] = { "env", BLOBMSG_TYPE_TABLE },
  72         [INSTANCE_ATTR_DATA] = { "data", BLOBMSG_TYPE_TABLE },
  73         [INSTANCE_ATTR_NETDEV] = { "netdev", BLOBMSG_TYPE_ARRAY },
  74         [INSTANCE_ATTR_FILE] = { "file", BLOBMSG_TYPE_ARRAY },
  75         [INSTANCE_ATTR_TRIGGER] = { "triggers", BLOBMSG_TYPE_ARRAY },
  76         [INSTANCE_ATTR_RESPAWN] = { "respawn", BLOBMSG_TYPE_ARRAY },
  77         [INSTANCE_ATTR_NICE] = { "nice", BLOBMSG_TYPE_INT32 },
  78         [INSTANCE_ATTR_LIMITS] = { "limits", BLOBMSG_TYPE_TABLE },
  79         [INSTANCE_ATTR_WATCH] = { "watch", BLOBMSG_TYPE_ARRAY },
  80         [INSTANCE_ATTR_ERROR] = { "error", BLOBMSG_TYPE_ARRAY },
  81         [INSTANCE_ATTR_USER] = { "user", BLOBMSG_TYPE_STRING },
  82         [INSTANCE_ATTR_GROUP] = { "group", BLOBMSG_TYPE_STRING },
  83         [INSTANCE_ATTR_STDOUT] = { "stdout", BLOBMSG_TYPE_BOOL },
  84         [INSTANCE_ATTR_STDERR] = { "stderr", BLOBMSG_TYPE_BOOL },
  85         [INSTANCE_ATTR_NO_NEW_PRIVS] = { "no_new_privs", BLOBMSG_TYPE_BOOL },
  86         [INSTANCE_ATTR_JAIL] = { "jail", BLOBMSG_TYPE_TABLE },
  87         [INSTANCE_ATTR_TRACE] = { "trace", BLOBMSG_TYPE_BOOL },
  88         [INSTANCE_ATTR_SECCOMP] = { "seccomp", BLOBMSG_TYPE_STRING },
  89         [INSTANCE_ATTR_PIDFILE] = { "pidfile", BLOBMSG_TYPE_STRING },
  90         [INSTANCE_ATTR_RELOADSIG] = { "reload_signal", BLOBMSG_TYPE_INT32 },
  91         [INSTANCE_ATTR_TERMTIMEOUT] = { "term_timeout", BLOBMSG_TYPE_INT32 },
  92         [INSTANCE_ATTR_FACILITY] = { "facility", BLOBMSG_TYPE_STRING },
  93         [INSTANCE_ATTR_EXTROOT] = { "extroot", BLOBMSG_TYPE_STRING },
  94 };
  95
  96 enum {
  97         JAIL_ATTR_NAME,
  98         JAIL_ATTR_HOSTNAME,
  99         JAIL_ATTR_PROCFS,
 100         JAIL_ATTR_SYSFS,
 101         JAIL_ATTR_UBUS,
 102         JAIL_ATTR_LOG,
 103         JAIL_ATTR_RONLY,
 104         JAIL_ATTR_MOUNT,
 105         JAIL_ATTR_NETNS,
 106         JAIL_ATTR_USERNS,
 107         JAIL_ATTR_CGROUPSNS,
 108         JAIL_ATTR_REQUIREJAIL,
 109         __JAIL_ATTR_MAX,
 110 };
 111
 112 static const struct blobmsg_policy jail_attr[__JAIL_ATTR_MAX] = {
 113         [JAIL_ATTR_NAME] = { "name", BLOBMSG_TYPE_STRING },
 114         [JAIL_ATTR_HOSTNAME] = { "hostname", BLOBMSG_TYPE_STRING },
 115         [JAIL_ATTR_PROCFS] = { "procfs", BLOBMSG_TYPE_BOOL },
 116         [JAIL_ATTR_SYSFS] = { "sysfs", BLOBMSG_TYPE_BOOL },
 117         [JAIL_ATTR_UBUS] = { "ubus", BLOBMSG_TYPE_BOOL },
 118         [JAIL_ATTR_LOG] = { "log", BLOBMSG_TYPE_BOOL },
 119         [JAIL_ATTR_RONLY] = { "ronly", BLOBMSG_TYPE_BOOL },
 120         [JAIL_ATTR_MOUNT] = { "mount", BLOBMSG_TYPE_TABLE },
 121         [JAIL_ATTR_NETNS] = { "netns", BLOBMSG_TYPE_BOOL },
 122         [JAIL_ATTR_USERNS] = { "userns", BLOBMSG_TYPE_BOOL },
 123         [JAIL_ATTR_CGROUPSNS] = { "cgroupsns", BLOBMSG_TYPE_BOOL },
 124         [JAIL_ATTR_REQUIREJAIL] = { "requirejail", BLOBMSG_TYPE_BOOL },
 125 };
 126
 127 struct instance_netdev {
 128         struct blobmsg_list_node node;
 129         int ifindex;
 130 };
 131
 132 struct instance_file {
 133         struct blobmsg_list_node node;
 134         uint32_t md5[4];
 135 };
 136
 137 struct rlimit_name {
 138         const char *name;
 139         int resource;
 140 };
 141
 142 static const struct rlimit_name rlimit_names[] = {
 143         { "as", RLIMIT_AS },
 144         { "core", RLIMIT_CORE },
 145         { "cpu", RLIMIT_CPU },
 146         { "data", RLIMIT_DATA },
 147         { "fsize", RLIMIT_FSIZE },
 148         { "memlock", RLIMIT_MEMLOCK },
 149         { "nofile", RLIMIT_NOFILE },
 150         { "nproc", RLIMIT_NPROC },
 151         { "rss", RLIMIT_RSS },
 152         { "stack", RLIMIT_STACK },
 153 #ifdef linux
 154         { "nice", RLIMIT_NICE },
 155         { "rtprio", RLIMIT_RTPRIO },
 156         { "msgqueue", RLIMIT_MSGQUEUE },
 157         { "sigpending", RLIMIT_SIGPENDING },
 158 #endif
 159         { NULL, 0 }
 160 };
 161
 162 static void closefd(int fd)
 163 {
 164         if (fd > STDERR_FILENO)
 165                 close(fd);
 166 }
 167
 168 /* convert a string into numeric syslog facility or return -1 if no match found */
 169 static int
 170 syslog_facility_str_to_int(const char *facility)
 171 {
 172         CODE *p = facilitynames;
 173
 174         while (p->c_name && strcasecmp(p->c_name, facility))
 175                 p++;
 176
 177         return p->c_val;
 178 }
 179
 180 static void
 181 instance_limits(const char *limit, const char *value)
 182 {
 183         int i;
 184         struct rlimit rlim;
 185         unsigned long cur, max;
 186
 187         for (i = 0; rlimit_names[i].name != NULL; i++) {
 188                 if (strcmp(rlimit_names[i].name, limit))
 189                         continue;
 190                 if (!strcmp(value, "unlimited")) {
 191                         rlim.rlim_cur = RLIM_INFINITY;
 192                         rlim.rlim_max = RLIM_INFINITY;
 193                 } else {
 194                         if (getrlimit(rlimit_names[i].resource, &rlim))
 195                                 return;
 196
 197                         cur = rlim.rlim_cur;
 198                         max = rlim.rlim_max;
 199
 200                         if (sscanf(value, "%lu %lu", &cur, &max) < 1)
 201                                 return;
 202
 203                         rlim.rlim_cur = cur;
 204                         rlim.rlim_max = max;
 205                 }
 206
 207                 setrlimit(rlimit_names[i].resource, &rlim);
 208                 return;
 209         }
 210 }
 211
 212 static inline int
 213 jail_run(struct service_instance *in, char **argv)
 214 {
 215         struct blobmsg_list_node *var;
 216         struct jail *jail = &in->jail;
 217         int argc = 0;
 218
 219         argv[argc++] = UJAIL_BIN_PATH;
 220
 221         if (jail->name) {
 222                 argv[argc++] = "-n";
 223                 argv[argc++] = jail->name;
 224         }
 225
 226         if (jail->hostname) {
 227                 argv[argc++] = "-h";
 228                 argv[argc++] = jail->hostname;
 229         }
 230
 231         if (in->seccomp) {
 232                 argv[argc++] = "-S";
 233                 argv[argc++] = in->seccomp;
 234         }
 235
 236         if (in->user) {
 237                 argv[argc++] = "-U";
 238                 argv[argc++] = in->user;
 239         }
 240
 241         if (in->group) {
 242                 argv[argc++] = "-G";
 243                 argv[argc++] = in->group;
 244         }
 245
 246         if (in->no_new_privs)
 247                 argv[argc++] = "-c";
 248
 249         if (jail->procfs)
 250                 argv[argc++] = "-p";
 251
 252         if (jail->sysfs)
 253                 argv[argc++] = "-s";
 254
 255         if (jail->ubus)
 256                 argv[argc++] = "-u";
 257
 258         if (jail->log)
 259                 argv[argc++] = "-l";
 260
 261         if (jail->ronly)
 262                 argv[argc++] = "-o";
 263
 264         if (jail->netns)
 265                 argv[argc++] = "-N";
 266
 267         if (jail->userns)
 268                 argv[argc++] = "-f";
 269
 270         if (jail->cgroupsns)
 271                 argv[argc++] = "-F";
 272
 273         if (in->extroot) {
 274                 argv[argc++] = "-R";
 275                 argv[argc++] = in->extroot;
 276         }
 277
 278         blobmsg_list_for_each(&jail->mount, var) {
 279                 const char *type = blobmsg_data(var->data);
 280
 281                 if (*type == '1')
 282                         argv[argc++] = "-w";
 283                 else
 284                         argv[argc++] = "-r";
 285                 argv[argc++] = (char *) blobmsg_name(var->data);
 286         }
 287
 288         argv[argc++] = "--";
 289
 290         return argc;
 291 }
 292
 293 static int
 294 instance_removepid(struct service_instance *in) {
 295         if (!in->pidfile)
 296                 return 0;
 297         if (unlink(in->pidfile)) {
 298                 ERROR("Failed to remove pidfile: %s: %m\n", in->pidfile);
 299                 return 1;
 300         }
 301         return 0;
 302 }
 303
 304 static int
 305 instance_writepid(struct service_instance *in)
 306 {
 307         FILE *_pidfile;
 308
 309         if (!in->pidfile) {
 310                 return 0;
 311         }
 312         _pidfile = fopen(in->pidfile, "w");
 313         if (_pidfile == NULL) {
 314                 ERROR("failed to open pidfile for writing: %s: %m", in->pidfile);
 315                 return 1;
 316         }
 317         if (fprintf(_pidfile, "%d\n", in->proc.pid) < 0) {
 318                 ERROR("failed to write pidfile: %s: %m", in->pidfile);
 319                 fclose(_pidfile);
 320                 return 2;
 321         }
 322         if (fclose(_pidfile)) {
 323                 ERROR("failed to close pidfile: %s: %m", in->pidfile);
 324                 return 3;
 325         }
 326
 327         return 0;
 328 }
 329
 330 static void
 331 instance_run(struct service_instance *in, int _stdout, int _stderr)
 332 {
 333         struct blobmsg_list_node *var;
 334         struct blob_attr *cur;
 335         char **argv;
 336         int argc = 1; /* NULL terminated */
 337         int rem, _stdin;
 338         bool seccomp = !in->trace && !in->has_jail && in->seccomp;
 339         bool setlbf = _stdout >= 0;
 340
 341         if (in->nice)
 342                 setpriority(PRIO_PROCESS, 0, in->nice);
 343
 344         blobmsg_for_each_attr(cur, in->command, rem)
 345                 argc++;
 346
 347         blobmsg_list_for_each(&in->env, var)
 348                 setenv(blobmsg_name(var->data), blobmsg_data(var->data), 1);
 349
 350         if (seccomp)
 351                 setenv("SECCOMP_FILE", in->seccomp, 1);
 352
 353         if (setlbf)
 354                 setenv("LD_PRELOAD", "/lib/libsetlbf.so", 1);
 355
 356         blobmsg_list_for_each(&in->limits, var)
 357                 instance_limits(blobmsg_name(var->data), blobmsg_data(var->data));
 358
 359         if (in->trace || seccomp)
 360                 argc += 1;
 361
 362         argv = alloca(sizeof(char *) * (argc + in->jail.argc));
 363         argc = 0;
 364
 365 #ifdef SECCOMP_SUPPORT
 366         if (in->trace)
 367                 argv[argc++] = "/sbin/utrace";
 368         else if (seccomp)
 369                 argv[argc++] = "/sbin/seccomp-trace";
 370 #else
 371         if (in->trace || seccomp)
 372                 ULOG_WARN("Seccomp support for %s::%s not available\n", in->srv->name, in->name);
 373 #endif
 374
 375         if (in->has_jail) {
 376                 argc = jail_run(in, argv);
 377                 if (argc != in->jail.argc)
 378                         ULOG_WARN("expected %i jail params, used %i for %s::%s\n",
 379                                 in->jail.argc, argc, in->srv->name, in->name);
 380         }
 381
 382         blobmsg_for_each_attr(cur, in->command, rem)
 383                 argv[argc++] = blobmsg_data(cur);
 384
 385         argv[argc] = NULL;
 386
 387         _stdin = open("/dev/null", O_RDONLY);
 388
 389         if (_stdout == -1)
 390                 _stdout = open("/dev/null", O_WRONLY);
 391
 392         if (_stderr == -1)
 393                 _stderr = open("/dev/null", O_WRONLY);
 394
 395         if (_stdin > -1) {
 396                 dup2(_stdin, STDIN_FILENO);
 397                 closefd(_stdin);
 398         }
 399         if (_stdout > -1) {
 400                 dup2(_stdout, STDOUT_FILENO);
 401                 closefd(_stdout);
 402         }
 403         if (_stderr > -1) {
 404                 dup2(_stderr, STDERR_FILENO);
 405                 closefd(_stderr);
 406         }
 407
 408         if (!in->has_jail && in->user && in->pw_gid && initgroups(in->user, in->pw_gid)) {
 409                 ERROR("failed to initgroups() for user %s: %m\n", in->user);
 410                 exit(127);
 411         }
 412         if (!in->has_jail && in->gr_gid && setgid(in->gr_gid)) {
 413                 ERROR("failed to set group id %d: %m\n", in->gr_gid);
 414                 exit(127);
 415         }
 416         if (!in->has_jail && in->uid && setuid(in->uid)) {
 417                 ERROR("failed to set user id %d: %m\n", in->uid);
 418                 exit(127);
 419         }
 420
 421         execvp(argv[0], argv);
 422         exit(127);
 423 }
 424
 425 static void
 426 instance_free_stdio(struct service_instance *in)
 427 {
 428         if (in->_stdout.fd.fd > -1) {
 429                 ustream_free(&in->_stdout.stream);
 430                 close(in->_stdout.fd.fd);
 431                 in->_stdout.fd.fd = -1;
 432         }
 433
 434         if (in->_stderr.fd.fd > -1) {
 435                 ustream_free(&in->_stderr.stream);
 436                 close(in->_stderr.fd.fd);
 437                 in->_stderr.fd.fd = -1;
 438         }
 439 }
 440
 441 void
 442 instance_start(struct service_instance *in)
 443 {
 444         int pid;
 445         int opipe[2] = { -1, -1 };
 446         int epipe[2] = { -1, -1 };
 447
 448         if (!avl_is_empty(&in->errors.avl)) {
 449                 LOG("Not starting instance %s::%s, an error was indicated\n", in->srv->name, in->name);
 450                 return;
 451         }
 452
 453         if (!in->command) {
 454                 LOG("Not starting instance %s::%s, command not set\n", in->srv->name, in->name);
 455                 return;
 456         }
 457
 458         if (in->proc.pending) {
 459                 if (in->halt)
 460                         in->restart = true;
 461                 return;
 462         }
 463
 464         instance_free_stdio(in);
 465         if (in->_stdout.fd.fd > -2) {
 466                 if (pipe(opipe)) {
 467                         ULOG_WARN("pipe() failed: %m\n");
 468                         opipe[0] = opipe[1] = -1;
 469                 }
 470         }
 471
 472         if (in->_stderr.fd.fd > -2) {
 473                 if (pipe(epipe)) {
 474                         ULOG_WARN("pipe() failed: %m\n");
 475                         epipe[0] = epipe[1] = -1;
 476                 }
 477         }
 478
 479         in->restart = false;
 480         in->halt = false;
 481
 482         if (!in->valid)
 483                 return;
 484
 485         pid = fork();
 486         if (pid < 0)
 487                 return;
 488
 489         if (!pid) {
 490                 uloop_done();
 491                 closefd(opipe[0]);
 492                 closefd(epipe[0]);
 493                 instance_run(in, opipe[1], epipe[1]);
 494                 return;
 495         }
 496
 497         DEBUG(2, "Started instance %s::%s[%d]\n", in->srv->name, in->name, pid);
 498         in->proc.pid = pid;
 499         instance_writepid(in);
 500         clock_gettime(CLOCK_MONOTONIC, &in->start);
 501         uloop_process_add(&in->proc);
 502
 503         if (opipe[0] > -1) {
 504                 ustream_fd_init(&in->_stdout, opipe[0]);
 505                 closefd(opipe[1]);
 506                 fcntl(opipe[0], F_SETFD, FD_CLOEXEC);
 507         }
 508
 509         if (epipe[0] > -1) {
 510                 ustream_fd_init(&in->_stderr, epipe[0]);
 511                 closefd(epipe[1]);
 512                 fcntl(epipe[0], F_SETFD, FD_CLOEXEC);
 513         }
 514
 515         service_event("instance.start", in->srv->name, in->name);
 516 }
 517
 518 static void
 519 instance_stdio(struct ustream *s, int prio, struct service_instance *in)
 520 {
 521         char *newline, *str, *arg0, ident[32];
 522         int len;
 523
 524         arg0 = basename(blobmsg_data(blobmsg_data(in->command)));
 525         snprintf(ident, sizeof(ident), "%s[%d]", arg0, in->proc.pid);
 526         ulog_open(ULOG_SYSLOG, in->syslog_facility, ident);
 527
 528         do {
 529                 str = ustream_get_read_buf(s, &len);
 530                 if (!str)
 531                         break;
 532
 533                 newline = memchr(str, '\n', len);
 534                 if (!newline && (s->r.buffer_len != len))
 535                         break;
 536
 537                 if (newline) {
 538                         *newline = 0;
 539                         len = newline + 1 - str;
 540                 }
 541                 ulog(prio, "%s\n", str);
 542
 543                 ustream_consume(s, len);
 544         } while (1);
 545
 546         ulog_open(ULOG_SYSLOG, LOG_DAEMON, "procd");
 547 }
 548
 549 static void
 550 instance_stdout(struct ustream *s, int bytes)
 551 {
 552         instance_stdio(s, LOG_INFO,
 553                        container_of(s, struct service_instance, _stdout.stream));
 554 }
 555
 556 static void
 557 instance_stderr(struct ustream *s, int bytes)
 558 {
 559         instance_stdio(s, LOG_ERR,
 560                        container_of(s, struct service_instance, _stderr.stream));
 561 }
 562
 563 static void
 564 instance_timeout(struct uloop_timeout *t)
 565 {
 566         struct service_instance *in;
 567
 568         in = container_of(t, struct service_instance, timeout);
 569
 570         if (in->halt) {
 571                 LOG("Instance %s::%s pid %d not stopped on SIGTERM, sending SIGKILL instead\n",
 572                                 in->srv->name, in->name, in->proc.pid);
 573                 kill(in->proc.pid, SIGKILL);
 574         } else if (in->restart || in->respawn)
 575                 instance_start(in);
 576 }
 577
 578 static void
 579 instance_delete(struct service_instance *in)
 580 {
 581         struct service *s = in->srv;
 582
 583         avl_delete(&s->instances.avl, &in->node.avl);
 584         instance_free(in);
 585         service_stopped(s);
 586 }
 587
 588 static int
 589 instance_exit_code(int ret)
 590 {
 591         if (WIFEXITED(ret)) {
 592                 return WEXITSTATUS(ret);
 593         }
 594
 595         if (WIFSIGNALED(ret)) {
 596                 return SIGNALLED_OFFSET + WTERMSIG(ret);
 597         }
 598
 599         if (WIFSTOPPED(ret)) {
 600                 return WSTOPSIG(ret);
 601         }
 602
 603         return 1;
 604 }
 605
 606 static void
 607 instance_exit(struct uloop_process *p, int ret)
 608 {
 609         struct service_instance *in;
 610         struct timespec tp;
 611         long runtime;
 612
 613         in = container_of(p, struct service_instance, proc);
 614
 615         clock_gettime(CLOCK_MONOTONIC, &tp);
 616         runtime = tp.tv_sec - in->start.tv_sec;
 617
 618         DEBUG(2, "Instance %s::%s exit with error code %d after %ld seconds\n", in->srv->name, in->name, ret, runtime);
 619
 620         in->exit_code = instance_exit_code(ret);
 621         uloop_timeout_cancel(&in->timeout);
 622         service_event("instance.stop", in->srv->name, in->name);
 623
 624         if (in->halt) {
 625                 instance_removepid(in);
 626                 if (in->restart)
 627                         instance_start(in);
 628                 else
 629                         instance_delete(in);
 630         } else if (in->restart) {
 631                 instance_start(in);
 632         } else if (in->respawn) {
 633                 if (runtime < in->respawn_threshold)
 634                         in->respawn_count++;
 635                 else
 636                         in->respawn_count = 0;
 637                 if (in->respawn_count > in->respawn_retry && in->respawn_retry > 0 ) {
 638                         LOG("Instance %s::%s s in a crash loop %d crashes, %ld seconds since last crash\n",
 639                                                                 in->srv->name, in->name, in->respawn_count, runtime);
 640                         in->restart = in->respawn = 0;
 641                         in->halt = 1;
 642                         service_event("instance.fail", in->srv->name, in->name);
 643                 } else {
 644                         service_event("instance.respawn", in->srv->name, in->name);
 645                         uloop_timeout_set(&in->timeout, in->respawn_timeout * 1000);
 646                 }
 647         }
 648 }
 649
 650 void
 651 instance_stop(struct service_instance *in, bool halt)
 652 {
 653         if (!in->proc.pending) {
 654                 if (halt)
 655                         instance_delete(in);
 656                 return;
 657         }
 658         in->halt = halt;
 659         in->restart = in->respawn = false;
 660         kill(in->proc.pid, SIGTERM);
 661         uloop_timeout_set(&in->timeout, in->term_timeout * 1000);
 662 }
 663
 664 static void
 665 instance_restart(struct service_instance *in)
 666 {
 667         if (!in->proc.pending)
 668                 return;
 669
 670         if (in->reload_signal) {
 671                 kill(in->proc.pid, in->reload_signal);
 672                 return;
 673         }
 674
 675         in->halt = true;
 676         in->restart = true;
 677         kill(in->proc.pid, SIGTERM);
 678         uloop_timeout_set(&in->timeout, in->term_timeout * 1000);
 679 }
 680
 681 static bool string_changed(const char *a, const char *b)
 682 {
 683         return !((!a && !b) || (a && b && !strcmp(a, b)));
 684 }
 685
 686 static bool
 687 instance_config_changed(struct service_instance *in, struct service_instance *in_new)
 688 {
 689         if (!in->valid)
 690                 return true;
 691
 692         if (!blob_attr_equal(in->command, in_new->command))
 693                 return true;
 694
 695         if (!blobmsg_list_equal(&in->env, &in_new->env))
 696                 return true;
 697
 698         if (!blobmsg_list_equal(&in->netdev, &in_new->netdev))
 699                 return true;
 700
 701         if (!blobmsg_list_equal(&in->file, &in_new->file))
 702                 return true;
 703
 704         if (in->nice != in_new->nice)
 705                 return true;
 706
 707         if (in->syslog_facility != in_new->syslog_facility)
 708                 return true;
 709
 710         if (string_changed(in->user, in_new->user))
 711                 return true;
 712
 713         if (string_changed(in->group, in_new->group))
 714                 return true;
 715
 716         if (in->uid != in_new->uid)
 717                 return true;
 718
 719         if (in->pw_gid != in_new->pw_gid)
 720                 return true;
 721
 722         if (string_changed(in->pidfile, in_new->pidfile))
 723                 return true;
 724
 725         if (in->respawn_retry != in_new->respawn_retry)
 726                 return true;
 727         if (in->respawn_threshold != in_new->respawn_threshold)
 728                 return true;
 729         if (in->respawn_timeout != in_new->respawn_timeout)
 730                 return true;
 731
 732         if ((!in->seccomp && in_new->seccomp) ||
 733             (in->seccomp && !in_new->seccomp) ||
 734             (in->seccomp && in_new->seccomp && strcmp(in->seccomp, in_new->seccomp)))
 735                 return true;
 736
 737         if (!blobmsg_list_equal(&in->limits, &in_new->limits))
 738                 return true;
 739
 740         if (!blobmsg_list_equal(&in->jail.mount, &in_new->jail.mount))
 741                 return true;
 742
 743         if (!blobmsg_list_equal(&in->errors, &in_new->errors))
 744                 return true;
 745
 746         return false;
 747 }
 748
 749 static bool
 750 instance_netdev_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2)
 751 {
 752         struct instance_netdev *n1 = container_of(l1, struct instance_netdev, node);
 753         struct instance_netdev *n2 = container_of(l2, struct instance_netdev, node);
 754
 755         return n1->ifindex == n2->ifindex;
 756 }
 757
 758 static void
 759 instance_netdev_update(struct blobmsg_list_node *l)
 760 {
 761         struct instance_netdev *n = container_of(l, struct instance_netdev, node);
 762
 763         n->ifindex = if_nametoindex(n->node.avl.key);
 764 }
 765
 766 static bool
 767 instance_file_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2)
 768 {
 769         struct instance_file *f1 = container_of(l1, struct instance_file, node);
 770         struct instance_file *f2 = container_of(l2, struct instance_file, node);
 771
 772         return !memcmp(f1->md5, f2->md5, sizeof(f1->md5));
 773 }
 774
 775 static void
 776 instance_file_update(struct blobmsg_list_node *l)
 777 {
 778         struct instance_file *f = container_of(l, struct instance_file, node);
 779         md5_ctx_t md5;
 780         char buf[256];
 781         int len, fd;
 782
 783         memset(f->md5, 0, sizeof(f->md5));
 784
 785         fd = open(l->avl.key, O_RDONLY);
 786         if (fd < 0)
 787                 return;
 788
 789         md5_begin(&md5);
 790         do {
 791                 len = read(fd, buf, sizeof(buf));
 792                 if (len < 0) {
 793                         if (errno == EINTR)
 794                                 continue;
 795
 796                         break;
 797                 }
 798                 if (!len)
 799                         break;
 800
 801                 md5_hash(buf, len, &md5);
 802         } while(1);
 803
 804         md5_end(f->md5, &md5);
 805         close(fd);
 806 }
 807
 808 static void
 809 instance_fill_any(struct blobmsg_list *l, struct blob_attr *cur)
 810 {
 811         if (!cur)
 812                 return;
 813
 814         blobmsg_list_fill(l, blobmsg_data(cur), blobmsg_data_len(cur), false);
 815 }
 816
 817 static bool
 818 instance_fill_array(struct blobmsg_list *l, struct blob_attr *cur, blobmsg_update_cb cb, bool array)
 819 {
 820         struct blobmsg_list_node *node;
 821
 822         if (!cur)
 823                 return true;
 824
 825         if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
 826                 return false;
 827
 828         blobmsg_list_fill(l, blobmsg_data(cur), blobmsg_data_len(cur), array);
 829         if (cb) {
 830                 blobmsg_list_for_each(l, node)
 831                         cb(node);
 832         }
 833         return true;
 834 }
 835
 836 static int
 837 instance_jail_parse(struct service_instance *in, struct blob_attr *attr)
 838 {
 839         struct blob_attr *tb[__JAIL_ATTR_MAX];
 840         struct jail *jail = &in->jail;
 841
 842         blobmsg_parse(jail_attr, __JAIL_ATTR_MAX, tb,
 843                 blobmsg_data(attr), blobmsg_data_len(attr));
 844
 845         jail->argc = 2;
 846
 847         if (tb[JAIL_ATTR_REQUIREJAIL]) {
 848                 in->require_jail = true;
 849                 jail->argc++;
 850         }
 851         if (tb[JAIL_ATTR_NAME]) {
 852                 jail->name = strdup(blobmsg_get_string(tb[JAIL_ATTR_NAME]));
 853                 jail->argc += 2;
 854         }
 855         if (tb[JAIL_ATTR_HOSTNAME]) {
 856                 jail->hostname = strdup(blobmsg_get_string(tb[JAIL_ATTR_HOSTNAME]));
 857                 jail->argc += 2;
 858         }
 859         if (tb[JAIL_ATTR_PROCFS]) {
 860                 jail->procfs = blobmsg_get_bool(tb[JAIL_ATTR_PROCFS]);
 861                 jail->argc++;
 862         }
 863         if (tb[JAIL_ATTR_SYSFS]) {
 864                 jail->sysfs = blobmsg_get_bool(tb[JAIL_ATTR_SYSFS]);
 865                 jail->argc++;
 866         }
 867         if (tb[JAIL_ATTR_UBUS]) {
 868                 jail->ubus = blobmsg_get_bool(tb[JAIL_ATTR_UBUS]);
 869                 jail->argc++;
 870         }
 871         if (tb[JAIL_ATTR_LOG]) {
 872                 jail->log = blobmsg_get_bool(tb[JAIL_ATTR_LOG]);
 873                 jail->argc++;
 874         }
 875         if (tb[JAIL_ATTR_RONLY]) {
 876                 jail->ronly = blobmsg_get_bool(tb[JAIL_ATTR_RONLY]);
 877                 jail->argc++;
 878         }
 879         if (tb[JAIL_ATTR_NETNS]) {
 880                 jail->netns = blobmsg_get_bool(tb[JAIL_ATTR_NETNS]);
 881                 jail->argc++;
 882         }
 883         if (tb[JAIL_ATTR_USERNS]) {
 884                 jail->userns = blobmsg_get_bool(tb[JAIL_ATTR_USERNS]);
 885                 jail->argc++;
 886         }
 887         if (tb[JAIL_ATTR_CGROUPSNS]) {
 888                 jail->cgroupsns = blobmsg_get_bool(tb[JAIL_ATTR_CGROUPSNS]);
 889                 jail->argc++;
 890         }
 891
 892         if (tb[JAIL_ATTR_MOUNT]) {
 893                 struct blob_attr *cur;
 894                 int rem;
 895
 896                 blobmsg_for_each_attr(cur, tb[JAIL_ATTR_MOUNT], rem)
 897                         jail->argc += 2;
 898                 instance_fill_array(&jail->mount, tb[JAIL_ATTR_MOUNT], NULL, false);
 899         }
 900         if (in->seccomp)
 901                 jail->argc += 2;
 902
 903         if (in->user)
 904                 jail->argc += 2;
 905
 906         if (in->group)
 907                 jail->argc += 2;
 908
 909         if (in->extroot) {
 910                 jail->argc += 2;
 911         }
 912
 913         if (in->no_new_privs)
 914                 jail->argc++;
 915
 916         return true;
 917 }
 918
 919 static bool
 920 instance_config_parse_command(struct service_instance *in, struct blob_attr **tb)
 921 {
 922         struct blob_attr *cur, *cur2;
 923         bool ret = false;
 924         int rem;
 925
 926         cur = tb[INSTANCE_ATTR_COMMAND];
 927         if (!cur) {
 928                 in->command = NULL;
 929                 return true;
 930         }
 931
 932         if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
 933                 return false;
 934
 935         blobmsg_for_each_attr(cur2, cur, rem) {
 936                 ret = true;
 937                 break;
 938         }
 939
 940         in->command = cur;
 941         return ret;
 942 }
 943
 944 static bool
 945 instance_config_parse(struct service_instance *in)
 946 {
 947         struct blob_attr *tb[__INSTANCE_ATTR_MAX];
 948         struct blob_attr *cur, *cur2;
 949         struct stat s;
 950         int rem, r;
 951
 952         blobmsg_parse(instance_attr, __INSTANCE_ATTR_MAX, tb,
 953                 blobmsg_data(in->config), blobmsg_data_len(in->config));
 954
 955         if (!instance_config_parse_command(in, tb))
 956                 return false;
 957
 958         if (tb[INSTANCE_ATTR_TERMTIMEOUT])
 959                 in->term_timeout = blobmsg_get_u32(tb[INSTANCE_ATTR_TERMTIMEOUT]);
 960         if (tb[INSTANCE_ATTR_RESPAWN]) {
 961                 int i = 0;
 962                 uint32_t vals[3] = { 3600, 5, 5};
 963
 964                 blobmsg_for_each_attr(cur2, tb[INSTANCE_ATTR_RESPAWN], rem) {
 965                         if ((i >= 3) && (blobmsg_type(cur2) == BLOBMSG_TYPE_STRING))
 966                                 continue;
 967                         vals[i] = atoi(blobmsg_get_string(cur2));
 968                         i++;
 969                 }
 970                 in->respawn = true;
 971                 in->respawn_count = 0;
 972                 in->respawn_threshold = vals[0];
 973                 in->respawn_timeout = vals[1];
 974                 in->respawn_retry = vals[2];
 975         }
 976         if (tb[INSTANCE_ATTR_TRIGGER]) {
 977                 in->trigger = tb[INSTANCE_ATTR_TRIGGER];
 978                 trigger_add(in->trigger, in);
 979         }
 980
 981         if (tb[INSTANCE_ATTR_WATCH]) {
 982                 blobmsg_for_each_attr(cur2, tb[INSTANCE_ATTR_WATCH], rem) {
 983                         if (blobmsg_type(cur2) != BLOBMSG_TYPE_STRING)
 984                                 continue;
 985                         DEBUG(3, "watch for %s\n", blobmsg_get_string(cur2));
 986                         watch_add(blobmsg_get_string(cur2), in);
 987                 }
 988         }
 989
 990         if ((cur = tb[INSTANCE_ATTR_NICE])) {
 991                 in->nice = (int8_t) blobmsg_get_u32(cur);
 992                 if (in->nice < -20 || in->nice > 20)
 993                         return false;
 994         }
 995
 996         if (tb[INSTANCE_ATTR_USER]) {
 997                 const char *user = blobmsg_get_string(tb[INSTANCE_ATTR_USER]);
 998                 struct passwd *p = getpwnam(user);
 999                 if (p) {
1000                         in->user = strdup(user);
1001                         in->uid = p->pw_uid;
1002                         in->gr_gid = in->pw_gid = p->pw_gid;
1003                 }
1004         }
1005
1006         if (tb[INSTANCE_ATTR_GROUP]) {
1007                 const char *group = blobmsg_get_string(tb[INSTANCE_ATTR_GROUP]);
1008                 struct group *p = getgrnam(group);
1009                 if (p) {
1010                         in->group = strdup(group);
1011                         in->gr_gid = p->gr_gid;
1012                 }
1013         }
1014
1015         if (tb[INSTANCE_ATTR_TRACE])
1016                 in->trace = blobmsg_get_bool(tb[INSTANCE_ATTR_TRACE]);
1017
1018         if (tb[INSTANCE_ATTR_NO_NEW_PRIVS])
1019                 in->no_new_privs = blobmsg_get_bool(tb[INSTANCE_ATTR_NO_NEW_PRIVS]);
1020
1021         if (!in->trace && tb[INSTANCE_ATTR_SECCOMP])
1022                 in->seccomp = strdup(blobmsg_get_string(tb[INSTANCE_ATTR_SECCOMP]));
1023
1024         if (tb[INSTANCE_ATTR_EXTROOT])
1025                 in->extroot = strdup(blobmsg_get_string(tb[INSTANCE_ATTR_EXTROOT]));
1026
1027         if (tb[INSTANCE_ATTR_PIDFILE]) {
1028                 char *pidfile = blobmsg_get_string(tb[INSTANCE_ATTR_PIDFILE]);
1029                 if (pidfile)
1030                         in->pidfile = strdup(pidfile);
1031         }
1032
1033         if (tb[INSTANCE_ATTR_RELOADSIG])
1034                 in->reload_signal = blobmsg_get_u32(tb[INSTANCE_ATTR_RELOADSIG]);
1035
1036         if (!in->trace && tb[INSTANCE_ATTR_JAIL])
1037                 in->has_jail = instance_jail_parse(in, tb[INSTANCE_ATTR_JAIL]);
1038
1039         if (in->has_jail) {
1040                 r = stat(UJAIL_BIN_PATH, &s);
1041                 if (r < 0) {
1042                         if (in->require_jail) {
1043                                 ERROR("Cannot jail service %s::%s. %s: %m (%d)\n",
1044                                                 in->srv->name, in->name, UJAIL_BIN_PATH, r);
1045                                 return false;
1046                         }
1047                         DEBUG(2, "unable to find %s: %m (%d)\n", UJAIL_BIN_PATH, r);
1048                         in->has_jail = false;
1049                 }
1050         }
1051
1052         if (tb[INSTANCE_ATTR_STDOUT] && blobmsg_get_bool(tb[INSTANCE_ATTR_STDOUT]))
1053                 in->_stdout.fd.fd = -1;
1054
1055         if (tb[INSTANCE_ATTR_STDERR] && blobmsg_get_bool(tb[INSTANCE_ATTR_STDERR]))
1056                 in->_stderr.fd.fd = -1;
1057
1058         instance_fill_any(&in->data, tb[INSTANCE_ATTR_DATA]);
1059
1060         if (!instance_fill_array(&in->env, tb[INSTANCE_ATTR_ENV], NULL, false))
1061                 return false;
1062
1063         if (!instance_fill_array(&in->netdev, tb[INSTANCE_ATTR_NETDEV], instance_netdev_update, true))
1064                 return false;
1065
1066         if (!instance_fill_array(&in->file, tb[INSTANCE_ATTR_FILE], instance_file_update, true))
1067                 return false;
1068
1069         if (!instance_fill_array(&in->limits, tb[INSTANCE_ATTR_LIMITS], NULL, false))
1070                 return false;
1071
1072         if (!instance_fill_array(&in->errors, tb[INSTANCE_ATTR_ERROR], NULL, true))
1073                 return false;
1074
1075         if (tb[INSTANCE_ATTR_FACILITY]) {
1076                 int facility = syslog_facility_str_to_int(blobmsg_get_string(tb[INSTANCE_ATTR_FACILITY]));
1077                 if (facility != -1) {
1078                         in->syslog_facility = facility;
1079                         DEBUG(3, "setting facility '%s'\n", blobmsg_get_string(tb[INSTANCE_ATTR_FACILITY]));
1080                 } else
1081                         DEBUG(3, "unknown syslog facility '%s' given, using default (LOG_DAEMON)\n", blobmsg_get_string(tb[INSTANCE_ATTR_FACILITY]));
1082         }
1083
1084         return true;
1085 }
1086
1087 static void
1088 instance_config_cleanup(struct service_instance *in)
1089 {
1090         blobmsg_list_free(&in->env);
1091         blobmsg_list_free(&in->data);
1092         blobmsg_list_free(&in->netdev);
1093         blobmsg_list_free(&in->file);
1094         blobmsg_list_free(&in->limits);
1095         blobmsg_list_free(&in->errors);
1096         blobmsg_list_free(&in->jail.mount);
1097 }
1098
1099 static void
1100 instance_config_move_strdup(char **dst, char *src)
1101 {
1102         if (*dst) {
1103                 free(*dst);
1104                 *dst = NULL;
1105         }
1106
1107         if (!src)
1108                 return;
1109
1110         *dst = strdup(src);
1111 }
1112
1113 static void
1114 instance_config_move(struct service_instance *in, struct service_instance *in_src)
1115 {
1116         instance_config_cleanup(in);
1117         blobmsg_list_move(&in->env, &in_src->env);
1118         blobmsg_list_move(&in->data, &in_src->data);
1119         blobmsg_list_move(&in->netdev, &in_src->netdev);
1120         blobmsg_list_move(&in->file, &in_src->file);
1121         blobmsg_list_move(&in->limits, &in_src->limits);
1122         blobmsg_list_move(&in->errors, &in_src->errors);
1123         blobmsg_list_move(&in->jail.mount, &in_src->jail.mount);
1124         in->trigger = in_src->trigger;
1125         in->command = in_src->command;
1126         in->respawn = in_src->respawn;
1127         in->respawn_retry = in_src->respawn_retry;
1128         in->respawn_threshold = in_src->respawn_threshold;
1129         in->respawn_timeout = in_src->respawn_timeout;
1130         in->name = in_src->name;
1131         in->trace = in_src->trace;
1132         in->node.avl.key = in_src->node.avl.key;
1133         in->syslog_facility = in_src->syslog_facility;
1134
1135         instance_config_move_strdup(&in->pidfile, in_src->pidfile);
1136         instance_config_move_strdup(&in->seccomp, in_src->seccomp);
1137         instance_config_move_strdup(&in->jail.name, in_src->jail.name);
1138         instance_config_move_strdup(&in->jail.hostname, in_src->jail.hostname);
1139
1140         free(in->config);
1141         in->config = in_src->config;
1142         in_src->config = NULL;
1143 }
1144
1145 void
1146 instance_update(struct service_instance *in, struct service_instance *in_new)
1147 {
1148         bool changed = instance_config_changed(in, in_new);
1149         bool running = in->proc.pending;
1150         bool stopping = in->halt;
1151
1152         if (!running || stopping) {
1153                 instance_config_move(in, in_new);
1154                 instance_start(in);
1155         } else {
1156                 if (changed)
1157                         instance_restart(in);
1158                 instance_config_move(in, in_new);
1159                 /* restart happens in the child callback handler */
1160         }
1161 }
1162
1163 void
1164 instance_free(struct service_instance *in)
1165 {
1166         instance_free_stdio(in);
1167         uloop_process_delete(&in->proc);
1168         uloop_timeout_cancel(&in->timeout);
1169         trigger_del(in);
1170         watch_del(in);
1171         instance_config_cleanup(in);
1172         free(in->config);
1173         free(in->user);
1174         free(in->group);
1175         free(in->extroot);
1176         free(in->jail.name);
1177         free(in->jail.hostname);
1178         free(in->seccomp);
1179         free(in->pidfile);
1180         free(in);
1181 }
1182
1183 void
1184 instance_init(struct service_instance *in, struct service *s, struct blob_attr *config)
1185 {
1186         config = blob_memdup(config);
1187         in->srv = s;
1188         in->name = blobmsg_name(config);
1189         in->config = config;
1190         in->timeout.cb = instance_timeout;
1191         in->proc.cb = instance_exit;
1192         in->term_timeout = 5;
1193         in->syslog_facility = LOG_DAEMON;
1194         in->exit_code = 0;
1195         in->require_jail = false;
1196
1197         in->_stdout.fd.fd = -2;
1198         in->_stdout.stream.string_data = true;
1199         in->_stdout.stream.notify_read = instance_stdout;
1200
1201         in->_stderr.fd.fd = -2;
1202         in->_stderr.stream.string_data = true;
1203         in->_stderr.stream.notify_read = instance_stderr;
1204
1205         blobmsg_list_init(&in->netdev, struct instance_netdev, node, instance_netdev_cmp);
1206         blobmsg_list_init(&in->file, struct instance_file, node, instance_file_cmp);
1207         blobmsg_list_simple_init(&in->env);
1208         blobmsg_list_simple_init(&in->data);
1209         blobmsg_list_simple_init(&in->limits);
1210         blobmsg_list_simple_init(&in->errors);
1211         blobmsg_list_simple_init(&in->jail.mount);
1212         in->valid = instance_config_parse(in);
1213 }
1214
1215 void instance_dump(struct blob_buf *b, struct service_instance *in, int verbose)
1216 {
1217         void *i;
1218
1219         if (!in->valid)
1220                 return;
1221
1222         i = blobmsg_open_table(b, in->name);
1223         blobmsg_add_u8(b, "running", in->proc.pending);
1224         if (in->proc.pending)
1225                 blobmsg_add_u32(b, "pid", in->proc.pid);
1226         if (in->command)
1227                 blobmsg_add_blob(b, in->command);
1228         blobmsg_add_u32(b, "term_timeout", in->term_timeout);
1229         if (!in->proc.pending)
1230                 blobmsg_add_u32(b, "exit_code", in->exit_code);
1231
1232         if (!avl_is_empty(&in->errors.avl)) {
1233                 struct blobmsg_list_node *var;
1234                 void *e = blobmsg_open_array(b, "errors");
1235                 blobmsg_list_for_each(&in->errors, var)
1236                         blobmsg_add_string(b, NULL, blobmsg_data(var->data));
1237                 blobmsg_close_table(b, e);
1238         }
1239
1240         if (!avl_is_empty(&in->env.avl)) {
1241                 struct blobmsg_list_node *var;
1242                 void *e = blobmsg_open_table(b, "env");
1243                 blobmsg_list_for_each(&in->env, var)
1244                         blobmsg_add_string(b, blobmsg_name(var->data), blobmsg_data(var->data));
1245                 blobmsg_close_table(b, e);
1246         }
1247
1248         if (!avl_is_empty(&in->data.avl)) {
1249                 struct blobmsg_list_node *var;
1250                 void *e = blobmsg_open_table(b, "data");
1251                 blobmsg_list_for_each(&in->data, var)
1252                         blobmsg_add_blob(b, var->data);
1253                 blobmsg_close_table(b, e);
1254         }
1255
1256         if (!avl_is_empty(&in->limits.avl)) {
1257                 struct blobmsg_list_node *var;
1258                 void *e = blobmsg_open_table(b, "limits");
1259                 blobmsg_list_for_each(&in->limits, var)
1260                         blobmsg_add_string(b, blobmsg_name(var->data), blobmsg_data(var->data));
1261                 blobmsg_close_table(b, e);
1262         }
1263
1264         if (in->reload_signal)
1265                 blobmsg_add_u32(b, "reload_signal", in->reload_signal);
1266
1267         if (in->respawn) {
1268                 void *r = blobmsg_open_table(b, "respawn");
1269                 blobmsg_add_u32(b, "threshold", in->respawn_threshold);
1270                 blobmsg_add_u32(b, "timeout", in->respawn_timeout);
1271                 blobmsg_add_u32(b, "retry", in->respawn_retry);
1272                 blobmsg_close_table(b, r);
1273         }
1274
1275         if (in->trace)
1276                 blobmsg_add_u8(b, "trace", true);
1277
1278         if (in->no_new_privs)
1279                 blobmsg_add_u8(b, "no_new_privs", true);
1280
1281         if (in->seccomp)
1282                 blobmsg_add_string(b, "seccomp", in->seccomp);
1283
1284         if (in->pidfile)
1285                 blobmsg_add_string(b, "pidfile", in->pidfile);
1286
1287         if (in->user)
1288                 blobmsg_add_string(b, "user", in->user);
1289
1290         if (in->group)
1291                 blobmsg_add_string(b, "group", in->group);
1292
1293         if (in->has_jail) {
1294                 void *r = blobmsg_open_table(b, "jail");
1295                 if (in->jail.name)
1296                         blobmsg_add_string(b, "name", in->jail.name);
1297                 if (in->jail.hostname)
1298                         blobmsg_add_string(b, "hostname", in->jail.hostname);
1299                 if (in->extroot)
1300                         blobmsg_add_string(b, "extroot", in->extroot);
1301                 blobmsg_add_u8(b, "procfs", in->jail.procfs);
1302                 blobmsg_add_u8(b, "sysfs", in->jail.sysfs);
1303                 blobmsg_add_u8(b, "ubus", in->jail.ubus);
1304                 blobmsg_add_u8(b, "log", in->jail.log);
1305                 blobmsg_add_u8(b, "ronly", in->jail.ronly);
1306                 blobmsg_add_u8(b, "netns", in->jail.netns);
1307                 blobmsg_add_u8(b, "userns", in->jail.userns);
1308                 blobmsg_add_u8(b, "cgroupsns", in->jail.cgroupsns);
1309                 blobmsg_close_table(b, r);
1310                 if (!avl_is_empty(&in->jail.mount.avl)) {
1311                         struct blobmsg_list_node *var;
1312                         void *e = blobmsg_open_table(b, "mount");
1313                         blobmsg_list_for_each(&in->jail.mount, var)
1314                                 blobmsg_add_string(b, blobmsg_name(var->data), blobmsg_data(var->data));
1315                         blobmsg_close_table(b, e);
1316                 }
1317         }
1318
1319         if (verbose && in->trigger)
1320                 blobmsg_add_blob(b, in->trigger);
1321
1322         blobmsg_close_table(b, i);
1323 }