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- /*
- * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
- * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License version 2.1
- * as published by the Free Software Foundation
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
- #define _GNU_SOURCE
- #include <sys/resource.h>
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <sys/stat.h>
- #include <net/if.h>
- #include <unistd.h>
- #include <stdint.h>
- #include <stdio.h>
- #include <fcntl.h>
- #include <pwd.h>
- #include <libgen.h>
- #include <unistd.h>
- #include <libubox/md5.h>
- #include "../procd.h"
- #include "service.h"
- #include "instance.h"
- enum {
- INSTANCE_ATTR_COMMAND,
- INSTANCE_ATTR_ENV,
- INSTANCE_ATTR_DATA,
- INSTANCE_ATTR_NETDEV,
- INSTANCE_ATTR_FILE,
- INSTANCE_ATTR_TRIGGER,
- INSTANCE_ATTR_RESPAWN,
- INSTANCE_ATTR_NICE,
- INSTANCE_ATTR_LIMITS,
- INSTANCE_ATTR_WATCH,
- INSTANCE_ATTR_ERROR,
- INSTANCE_ATTR_USER,
- INSTANCE_ATTR_STDOUT,
- INSTANCE_ATTR_STDERR,
- INSTANCE_ATTR_NO_NEW_PRIVS,
- INSTANCE_ATTR_JAIL,
- INSTANCE_ATTR_TRACE,
- INSTANCE_ATTR_SECCOMP,
- INSTANCE_ATTR_PIDFILE,
- INSTANCE_ATTR_RELOADSIG,
- INSTANCE_ATTR_TERMTIMEOUT,
- __INSTANCE_ATTR_MAX
- };
- static const struct blobmsg_policy instance_attr[__INSTANCE_ATTR_MAX] = {
- [INSTANCE_ATTR_COMMAND] = { "command", BLOBMSG_TYPE_ARRAY },
- [INSTANCE_ATTR_ENV] = { "env", BLOBMSG_TYPE_TABLE },
- [INSTANCE_ATTR_DATA] = { "data", BLOBMSG_TYPE_TABLE },
- [INSTANCE_ATTR_NETDEV] = { "netdev", BLOBMSG_TYPE_ARRAY },
- [INSTANCE_ATTR_FILE] = { "file", BLOBMSG_TYPE_ARRAY },
- [INSTANCE_ATTR_TRIGGER] = { "triggers", BLOBMSG_TYPE_ARRAY },
- [INSTANCE_ATTR_RESPAWN] = { "respawn", BLOBMSG_TYPE_ARRAY },
- [INSTANCE_ATTR_NICE] = { "nice", BLOBMSG_TYPE_INT32 },
- [INSTANCE_ATTR_LIMITS] = { "limits", BLOBMSG_TYPE_TABLE },
- [INSTANCE_ATTR_WATCH] = { "watch", BLOBMSG_TYPE_ARRAY },
- [INSTANCE_ATTR_ERROR] = { "error", BLOBMSG_TYPE_ARRAY },
- [INSTANCE_ATTR_USER] = { "user", BLOBMSG_TYPE_STRING },
- [INSTANCE_ATTR_STDOUT] = { "stdout", BLOBMSG_TYPE_BOOL },
- [INSTANCE_ATTR_STDERR] = { "stderr", BLOBMSG_TYPE_BOOL },
- [INSTANCE_ATTR_NO_NEW_PRIVS] = { "no_new_privs", BLOBMSG_TYPE_BOOL },
- [INSTANCE_ATTR_JAIL] = { "jail", BLOBMSG_TYPE_TABLE },
- [INSTANCE_ATTR_TRACE] = { "trace", BLOBMSG_TYPE_BOOL },
- [INSTANCE_ATTR_SECCOMP] = { "seccomp", BLOBMSG_TYPE_STRING },
- [INSTANCE_ATTR_PIDFILE] = { "pidfile", BLOBMSG_TYPE_STRING },
- [INSTANCE_ATTR_RELOADSIG] = { "reload_signal", BLOBMSG_TYPE_INT32 },
- [INSTANCE_ATTR_TERMTIMEOUT] = { "term_timeout", BLOBMSG_TYPE_INT32 },
- };
- enum {
- JAIL_ATTR_NAME,
- JAIL_ATTR_HOSTNAME,
- JAIL_ATTR_PROCFS,
- JAIL_ATTR_SYSFS,
- JAIL_ATTR_UBUS,
- JAIL_ATTR_LOG,
- JAIL_ATTR_RONLY,
- JAIL_ATTR_MOUNT,
- __JAIL_ATTR_MAX,
- };
- static const struct blobmsg_policy jail_attr[__JAIL_ATTR_MAX] = {
- [JAIL_ATTR_NAME] = { "name", BLOBMSG_TYPE_STRING },
- [JAIL_ATTR_HOSTNAME] = { "hostname", BLOBMSG_TYPE_STRING },
- [JAIL_ATTR_PROCFS] = { "procfs", BLOBMSG_TYPE_BOOL },
- [JAIL_ATTR_SYSFS] = { "sysfs", BLOBMSG_TYPE_BOOL },
- [JAIL_ATTR_UBUS] = { "ubus", BLOBMSG_TYPE_BOOL },
- [JAIL_ATTR_LOG] = { "log", BLOBMSG_TYPE_BOOL },
- [JAIL_ATTR_RONLY] = { "ronly", BLOBMSG_TYPE_BOOL },
- [JAIL_ATTR_MOUNT] = { "mount", BLOBMSG_TYPE_TABLE },
- };
- struct instance_netdev {
- struct blobmsg_list_node node;
- int ifindex;
- };
- struct instance_file {
- struct blobmsg_list_node node;
- uint32_t md5[4];
- };
- struct rlimit_name {
- const char *name;
- int resource;
- };
- static const struct rlimit_name rlimit_names[] = {
- { "as", RLIMIT_AS },
- { "core", RLIMIT_CORE },
- { "cpu", RLIMIT_CPU },
- { "data", RLIMIT_DATA },
- { "fsize", RLIMIT_FSIZE },
- { "memlock", RLIMIT_MEMLOCK },
- { "nofile", RLIMIT_NOFILE },
- { "nproc", RLIMIT_NPROC },
- { "rss", RLIMIT_RSS },
- { "stack", RLIMIT_STACK },
- #ifdef linux
- { "nice", RLIMIT_NICE },
- { "rtprio", RLIMIT_RTPRIO },
- { "msgqueue", RLIMIT_MSGQUEUE },
- { "sigpending", RLIMIT_SIGPENDING },
- #endif
- { NULL, 0 }
- };
- static char trace[] = "/sbin/utrace";
- static void closefd(int fd)
- {
- if (fd > STDERR_FILENO)
- close(fd);
- }
- static void
- instance_limits(const char *limit, const char *value)
- {
- int i;
- struct rlimit rlim;
- unsigned long cur, max;
- for (i = 0; rlimit_names[i].name != NULL; i++) {
- if (strcmp(rlimit_names[i].name, limit))
- continue;
- if (!strcmp(value, "unlimited")) {
- rlim.rlim_cur = RLIM_INFINITY;
- rlim.rlim_max = RLIM_INFINITY;
- } else {
- if (getrlimit(rlimit_names[i].resource, &rlim))
- return;
- cur = rlim.rlim_cur;
- max = rlim.rlim_max;
- if (sscanf(value, "%lu %lu", &cur, &max) < 1)
- return;
- rlim.rlim_cur = cur;
- rlim.rlim_max = max;
- }
- setrlimit(rlimit_names[i].resource, &rlim);
- return;
- }
- }
- static inline int
- jail_run(struct service_instance *in, char **argv)
- {
- struct blobmsg_list_node *var;
- struct jail *jail = &in->jail;
- int argc = 0;
- argv[argc++] = "/sbin/ujail";
- if (jail->name) {
- argv[argc++] = "-n";
- argv[argc++] = jail->name;
- }
- if (jail->hostname) {
- argv[argc++] = "-h";
- argv[argc++] = jail->hostname;
- }
- if (in->seccomp) {
- argv[argc++] = "-S";
- argv[argc++] = in->seccomp;
- }
- if (in->no_new_privs)
- argv[argc++] = "-c";
- if (jail->procfs)
- argv[argc++] = "-p";
- if (jail->sysfs)
- argv[argc++] = "-s";
- if (jail->ubus)
- argv[argc++] = "-u";
- if (jail->log)
- argv[argc++] = "-l";
- if (jail->ronly)
- argv[argc++] = "-o";
- blobmsg_list_for_each(&jail->mount, var) {
- const char *type = blobmsg_data(var->data);
- if (*type == '1')
- argv[argc++] = "-w";
- else
- argv[argc++] = "-r";
- argv[argc++] = (char *) blobmsg_name(var->data);
- }
- argv[argc++] = "--";
- return argc;
- }
- static int
- instance_removepid(struct service_instance *in) {
- if (!in->pidfile)
- return 0;
- if (unlink(in->pidfile)) {
- ERROR("Failed to removed pidfile: %s: %d - %s\n",
- in->pidfile, errno, strerror(errno));
- return 1;
- }
- return 0;
- }
- static int
- instance_writepid(struct service_instance *in)
- {
- FILE *_pidfile;
- if (!in->pidfile) {
- return 0;
- }
- _pidfile = fopen(in->pidfile, "w");
- if (_pidfile == NULL) {
- ERROR("failed to open pidfile for writing: %s: %d (%s)",
- in->pidfile, errno, strerror(errno));
- return 1;
- }
- if (fprintf(_pidfile, "%d\n", in->proc.pid) < 0) {
- ERROR("failed to write pidfile: %s: %d (%s)",
- in->pidfile, errno, strerror(errno));
- fclose(_pidfile);
- return 2;
- }
- if (fclose(_pidfile)) {
- ERROR("failed to close pidfile: %s: %d (%s)",
- in->pidfile, errno, strerror(errno));
- return 3;
- }
- return 0;
- }
- static void
- instance_run(struct service_instance *in, int _stdout, int _stderr)
- {
- struct blobmsg_list_node *var;
- struct blob_attr *cur;
- char **argv;
- char *ld_preload;
- int argc = 1; /* NULL terminated */
- int rem, _stdin;
- bool seccomp = !in->trace && !in->has_jail && in->seccomp;
- bool setlbf = _stdout >= 0;
- if (in->nice)
- setpriority(PRIO_PROCESS, 0, in->nice);
- blobmsg_for_each_attr(cur, in->command, rem)
- argc++;
- blobmsg_list_for_each(&in->env, var)
- setenv(blobmsg_name(var->data), blobmsg_data(var->data), 1);
- if (seccomp)
- setenv("SECCOMP_FILE", in->seccomp, 1);
- if ((seccomp || setlbf) && asprintf(&ld_preload, "LD_PRELOAD=%s%s%s",
- seccomp ? "/lib/libpreload-seccomp.so" : "",
- seccomp && setlbf ? ":" : "",
- setlbf ? "/lib/libsetlbf.so" : "") > 0)
- putenv(ld_preload);
- blobmsg_list_for_each(&in->limits, var)
- instance_limits(blobmsg_name(var->data), blobmsg_data(var->data));
- if (in->trace)
- argc += 1;
- argv = alloca(sizeof(char *) * (argc + in->jail.argc));
- argc = 0;
- if (in->trace)
- argv[argc++] = trace;
- if (in->has_jail)
- argc = jail_run(in, argv);
- blobmsg_for_each_attr(cur, in->command, rem)
- argv[argc++] = blobmsg_data(cur);
- argv[argc] = NULL;
- _stdin = open("/dev/null", O_RDONLY);
- if (_stdout == -1)
- _stdout = open("/dev/null", O_WRONLY);
- if (_stderr == -1)
- _stderr = open("/dev/null", O_WRONLY);
- if (_stdin > -1) {
- dup2(_stdin, STDIN_FILENO);
- closefd(_stdin);
- }
- if (_stdout > -1) {
- dup2(_stdout, STDOUT_FILENO);
- closefd(_stdout);
- }
- if (_stderr > -1) {
- dup2(_stderr, STDERR_FILENO);
- closefd(_stderr);
- }
- if (in->gid && setgid(in->gid)) {
- ERROR("failed to set group id %d: %d (%s)\n", in->gid, errno, strerror(errno));
- exit(127);
- }
- if (in->uid && setuid(in->uid)) {
- ERROR("failed to set user id %d: %d (%s)\n", in->uid, errno, strerror(errno));
- exit(127);
- }
- execvp(argv[0], argv);
- exit(127);
- }
- static void
- instance_free_stdio(struct service_instance *in)
- {
- if (in->_stdout.fd.fd > -1) {
- ustream_free(&in->_stdout.stream);
- close(in->_stdout.fd.fd);
- in->_stdout.fd.fd = -1;
- }
- if (in->_stderr.fd.fd > -1) {
- ustream_free(&in->_stderr.stream);
- close(in->_stderr.fd.fd);
- in->_stderr.fd.fd = -1;
- }
- }
- void
- instance_start(struct service_instance *in)
- {
- int pid;
- int opipe[2] = { -1, -1 };
- int epipe[2] = { -1, -1 };
- if (!avl_is_empty(&in->errors.avl)) {
- LOG("Not starting instance %s::%s, an error was indicated\n", in->srv->name, in->name);
- return;
- }
- if (!in->command) {
- LOG("Not starting instance %s::%s, command not set\n", in->srv->name, in->name);
- return;
- }
- if (in->proc.pending) {
- if (in->halt)
- in->restart = true;
- return;
- }
- instance_free_stdio(in);
- if (in->_stdout.fd.fd > -2) {
- if (pipe(opipe)) {
- ULOG_WARN("pipe() failed: %d (%s)\n", errno, strerror(errno));
- opipe[0] = opipe[1] = -1;
- }
- }
- if (in->_stderr.fd.fd > -2) {
- if (pipe(epipe)) {
- ULOG_WARN("pipe() failed: %d (%s)\n", errno, strerror(errno));
- epipe[0] = epipe[1] = -1;
- }
- }
- in->restart = false;
- in->halt = false;
- if (!in->valid)
- return;
- pid = fork();
- if (pid < 0)
- return;
- if (!pid) {
- uloop_done();
- closefd(opipe[0]);
- closefd(epipe[0]);
- instance_run(in, opipe[1], epipe[1]);
- return;
- }
- DEBUG(2, "Started instance %s::%s[%d]\n", in->srv->name, in->name, pid);
- in->proc.pid = pid;
- instance_writepid(in);
- clock_gettime(CLOCK_MONOTONIC, &in->start);
- uloop_process_add(&in->proc);
- if (opipe[0] > -1) {
- ustream_fd_init(&in->_stdout, opipe[0]);
- closefd(opipe[1]);
- }
- if (epipe[0] > -1) {
- ustream_fd_init(&in->_stderr, epipe[0]);
- closefd(epipe[1]);
- }
- service_event("instance.start", in->srv->name, in->name);
- }
- static void
- instance_stdio(struct ustream *s, int prio, struct service_instance *in)
- {
- char *newline, *str, *arg0, ident[32];
- int len;
- arg0 = basename(blobmsg_data(blobmsg_data(in->command)));
- snprintf(ident, sizeof(ident), "%s[%d]", arg0, in->proc.pid);
- ulog_open(ULOG_SYSLOG, LOG_DAEMON, ident);
- do {
- str = ustream_get_read_buf(s, NULL);
- if (!str)
- break;
- newline = strchr(str, '\n');
- if (!newline)
- break;
- *newline = 0;
- ulog(prio, "%s\n", str);
- len = newline + 1 - str;
- ustream_consume(s, len);
- } while (1);
- ulog_open(ULOG_SYSLOG, LOG_DAEMON, "procd");
- }
- static void
- instance_stdout(struct ustream *s, int bytes)
- {
- instance_stdio(s, LOG_INFO,
- container_of(s, struct service_instance, _stdout.stream));
- }
- static void
- instance_stderr(struct ustream *s, int bytes)
- {
- instance_stdio(s, LOG_ERR,
- container_of(s, struct service_instance, _stderr.stream));
- }
- static void
- instance_timeout(struct uloop_timeout *t)
- {
- struct service_instance *in;
- in = container_of(t, struct service_instance, timeout);
- if (in->halt) {
- LOG("Instance %s::%s pid %d not stopped on SIGTERM, sending SIGKILL instead\n",
- in->srv->name, in->name, in->proc.pid);
- kill(in->proc.pid, SIGKILL);
- } else if (in->restart || in->respawn)
- instance_start(in);
- }
- static void
- instance_exit(struct uloop_process *p, int ret)
- {
- struct service_instance *in;
- struct timespec tp;
- long runtime;
- in = container_of(p, struct service_instance, proc);
- clock_gettime(CLOCK_MONOTONIC, &tp);
- runtime = tp.tv_sec - in->start.tv_sec;
- DEBUG(2, "Instance %s::%s exit with error code %d after %ld seconds\n", in->srv->name, in->name, ret, runtime);
- if (upgrade_running)
- return;
- uloop_timeout_cancel(&in->timeout);
- service_event("instance.stop", in->srv->name, in->name);
- if (in->halt) {
- instance_removepid(in);
- if (in->restart)
- instance_start(in);
- else {
- struct service *s = in->srv;
- avl_delete(&s->instances.avl, &in->node.avl);
- instance_free(in);
- service_stopped(s);
- }
- } else if (in->restart) {
- instance_start(in);
- } else if (in->respawn) {
- if (runtime < in->respawn_threshold)
- in->respawn_count++;
- else
- in->respawn_count = 0;
- if (in->respawn_count > in->respawn_retry && in->respawn_retry > 0 ) {
- LOG("Instance %s::%s s in a crash loop %d crashes, %ld seconds since last crash\n",
- in->srv->name, in->name, in->respawn_count, runtime);
- in->restart = in->respawn = 0;
- in->halt = 1;
- service_event("instance.fail", in->srv->name, in->name);
- } else {
- service_event("instance.respawn", in->srv->name, in->name);
- uloop_timeout_set(&in->timeout, in->respawn_timeout * 1000);
- }
- }
- }
- void
- instance_stop(struct service_instance *in)
- {
- if (!in->proc.pending)
- return;
- in->halt = true;
- in->restart = in->respawn = false;
- kill(in->proc.pid, SIGTERM);
- uloop_timeout_set(&in->timeout, in->term_timeout * 1000);
- }
- static void
- instance_restart(struct service_instance *in)
- {
- if (!in->proc.pending)
- return;
- if (in->reload_signal) {
- kill(in->proc.pid, in->reload_signal);
- return;
- }
- in->halt = true;
- in->restart = true;
- kill(in->proc.pid, SIGTERM);
- uloop_timeout_set(&in->timeout, in->term_timeout * 1000);
- }
- static bool
- instance_config_changed(struct service_instance *in, struct service_instance *in_new)
- {
- if (!in->valid)
- return true;
- if (!blob_attr_equal(in->command, in_new->command))
- return true;
- if (!blobmsg_list_equal(&in->env, &in_new->env))
- return true;
- if (!blobmsg_list_equal(&in->netdev, &in_new->netdev))
- return true;
- if (!blobmsg_list_equal(&in->file, &in_new->file))
- return true;
- if (in->nice != in_new->nice)
- return true;
- if (in->uid != in_new->uid)
- return true;
- if (in->gid != in_new->gid)
- return true;
- if (in->pidfile && in_new->pidfile)
- if (strcmp(in->pidfile, in_new->pidfile))
- return true;
- if (in->pidfile && !in_new->pidfile)
- return true;
- if (!in->pidfile && in_new->pidfile)
- return true;
- if (!blobmsg_list_equal(&in->limits, &in_new->limits))
- return true;
- if (!blobmsg_list_equal(&in->jail.mount, &in_new->jail.mount))
- return true;
- if (!blobmsg_list_equal(&in->errors, &in_new->errors))
- return true;
- return false;
- }
- static bool
- instance_netdev_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2)
- {
- struct instance_netdev *n1 = container_of(l1, struct instance_netdev, node);
- struct instance_netdev *n2 = container_of(l2, struct instance_netdev, node);
- return n1->ifindex == n2->ifindex;
- }
- static void
- instance_netdev_update(struct blobmsg_list_node *l)
- {
- struct instance_netdev *n = container_of(l, struct instance_netdev, node);
- n->ifindex = if_nametoindex(n->node.avl.key);
- }
- static bool
- instance_file_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2)
- {
- struct instance_file *f1 = container_of(l1, struct instance_file, node);
- struct instance_file *f2 = container_of(l2, struct instance_file, node);
- return !memcmp(f1->md5, f2->md5, sizeof(f1->md5));
- }
- static void
- instance_file_update(struct blobmsg_list_node *l)
- {
- struct instance_file *f = container_of(l, struct instance_file, node);
- md5_ctx_t md5;
- char buf[256];
- int len, fd;
- memset(f->md5, 0, sizeof(f->md5));
- fd = open(l->avl.key, O_RDONLY);
- if (fd < 0)
- return;
- md5_begin(&md5);
- do {
- len = read(fd, buf, sizeof(buf));
- if (len < 0) {
- if (errno == EINTR)
- continue;
- break;
- }
- if (!len)
- break;
- md5_hash(buf, len, &md5);
- } while(1);
- md5_end(f->md5, &md5);
- close(fd);
- }
- static void
- instance_fill_any(struct blobmsg_list *l, struct blob_attr *cur)
- {
- if (!cur)
- return;
- blobmsg_list_fill(l, blobmsg_data(cur), blobmsg_data_len(cur), false);
- }
- static bool
- instance_fill_array(struct blobmsg_list *l, struct blob_attr *cur, blobmsg_update_cb cb, bool array)
- {
- struct blobmsg_list_node *node;
- if (!cur)
- return true;
- if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
- return false;
- blobmsg_list_fill(l, blobmsg_data(cur), blobmsg_data_len(cur), array);
- if (cb) {
- blobmsg_list_for_each(l, node)
- cb(node);
- }
- return true;
- }
- static int
- instance_jail_parse(struct service_instance *in, struct blob_attr *attr)
- {
- struct blob_attr *tb[__JAIL_ATTR_MAX];
- struct jail *jail = &in->jail;
- struct stat s;
- if (stat("/sbin/ujail", &s))
- return 0;
- blobmsg_parse(jail_attr, __JAIL_ATTR_MAX, tb,
- blobmsg_data(attr), blobmsg_data_len(attr));
- jail->argc = 2;
- if (tb[JAIL_ATTR_NAME]) {
- jail->name = blobmsg_get_string(tb[JAIL_ATTR_NAME]);
- jail->argc += 2;
- }
- if (tb[JAIL_ATTR_HOSTNAME]) {
- jail->hostname = blobmsg_get_string(tb[JAIL_ATTR_HOSTNAME]);
- jail->argc += 2;
- }
- if (tb[JAIL_ATTR_PROCFS]) {
- jail->procfs = blobmsg_get_bool(tb[JAIL_ATTR_PROCFS]);
- jail->argc++;
- }
- if (tb[JAIL_ATTR_SYSFS]) {
- jail->sysfs = blobmsg_get_bool(tb[JAIL_ATTR_SYSFS]);
- jail->argc++;
- }
- if (tb[JAIL_ATTR_UBUS]) {
- jail->ubus = blobmsg_get_bool(tb[JAIL_ATTR_UBUS]);
- jail->argc++;
- }
- if (tb[JAIL_ATTR_LOG]) {
- jail->log = blobmsg_get_bool(tb[JAIL_ATTR_LOG]);
- jail->argc++;
- }
- if (tb[JAIL_ATTR_RONLY]) {
- jail->ronly = blobmsg_get_bool(tb[JAIL_ATTR_RONLY]);
- jail->argc++;
- }
- if (tb[JAIL_ATTR_MOUNT]) {
- struct blob_attr *cur;
- int rem;
- blobmsg_for_each_attr(cur, tb[JAIL_ATTR_MOUNT], rem)
- jail->argc += 2;
- instance_fill_array(&jail->mount, tb[JAIL_ATTR_MOUNT], NULL, false);
- }
- if (in->seccomp)
- jail->argc += 2;
- return 1;
- }
- static bool
- instance_config_parse_command(struct service_instance *in, struct blob_attr **tb)
- {
- struct blob_attr *cur, *cur2;
- bool ret = false;
- int rem;
- cur = tb[INSTANCE_ATTR_COMMAND];
- if (!cur) {
- in->command = NULL;
- return true;
- }
- if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
- return false;
- blobmsg_for_each_attr(cur2, cur, rem) {
- ret = true;
- break;
- }
- in->command = cur;
- return ret;
- }
- static bool
- instance_config_parse(struct service_instance *in)
- {
- struct blob_attr *tb[__INSTANCE_ATTR_MAX];
- struct blob_attr *cur, *cur2;
- int rem;
- blobmsg_parse(instance_attr, __INSTANCE_ATTR_MAX, tb,
- blobmsg_data(in->config), blobmsg_data_len(in->config));
- if (!instance_config_parse_command(in, tb))
- return false;
- if (tb[INSTANCE_ATTR_TERMTIMEOUT])
- in->term_timeout = blobmsg_get_u32(tb[INSTANCE_ATTR_TERMTIMEOUT]);
- if (tb[INSTANCE_ATTR_RESPAWN]) {
- int i = 0;
- uint32_t vals[3] = { 3600, 5, 5};
- blobmsg_for_each_attr(cur2, tb[INSTANCE_ATTR_RESPAWN], rem) {
- if ((i >= 3) && (blobmsg_type(cur2) == BLOBMSG_TYPE_STRING))
- continue;
- vals[i] = atoi(blobmsg_get_string(cur2));
- i++;
- }
- in->respawn = true;
- in->respawn_count = 0;
- in->respawn_threshold = vals[0];
- in->respawn_timeout = vals[1];
- in->respawn_retry = vals[2];
- }
- if (tb[INSTANCE_ATTR_TRIGGER]) {
- in->trigger = tb[INSTANCE_ATTR_TRIGGER];
- trigger_add(in->trigger, in);
- }
- if (tb[INSTANCE_ATTR_WATCH]) {
- blobmsg_for_each_attr(cur2, tb[INSTANCE_ATTR_WATCH], rem) {
- if (blobmsg_type(cur2) != BLOBMSG_TYPE_STRING)
- continue;
- DEBUG(3, "watch for %s\n", blobmsg_get_string(cur2));
- watch_add(blobmsg_get_string(cur2), in);
- }
- }
- if ((cur = tb[INSTANCE_ATTR_NICE])) {
- in->nice = (int8_t) blobmsg_get_u32(cur);
- if (in->nice < -20 || in->nice > 20)
- return false;
- }
- if (tb[INSTANCE_ATTR_USER]) {
- struct passwd *p = getpwnam(blobmsg_get_string(tb[INSTANCE_ATTR_USER]));
- if (p) {
- in->uid = p->pw_uid;
- in->gid = p->pw_gid;
- }
- }
- if (tb[INSTANCE_ATTR_TRACE])
- in->trace = blobmsg_get_bool(tb[INSTANCE_ATTR_TRACE]);
- if (tb[INSTANCE_ATTR_NO_NEW_PRIVS])
- in->no_new_privs = blobmsg_get_bool(tb[INSTANCE_ATTR_NO_NEW_PRIVS]);
- if (!in->trace && tb[INSTANCE_ATTR_SECCOMP]) {
- char *seccomp = blobmsg_get_string(tb[INSTANCE_ATTR_SECCOMP]);
- struct stat s;
- if (stat(seccomp, &s))
- ERROR("%s: not starting seccomp as %s is missing\n", in->name, seccomp);
- else
- in->seccomp = seccomp;
- }
- if (tb[INSTANCE_ATTR_PIDFILE]) {
- char *pidfile = blobmsg_get_string(tb[INSTANCE_ATTR_PIDFILE]);
- if (pidfile)
- in->pidfile = pidfile;
- }
- if (tb[INSTANCE_ATTR_RELOADSIG])
- in->reload_signal = blobmsg_get_u32(tb[INSTANCE_ATTR_RELOADSIG]);
- if (!in->trace && tb[INSTANCE_ATTR_JAIL])
- in->has_jail = instance_jail_parse(in, tb[INSTANCE_ATTR_JAIL]);
- if (tb[INSTANCE_ATTR_STDOUT] && blobmsg_get_bool(tb[INSTANCE_ATTR_STDOUT]))
- in->_stdout.fd.fd = -1;
- if (tb[INSTANCE_ATTR_STDERR] && blobmsg_get_bool(tb[INSTANCE_ATTR_STDERR]))
- in->_stderr.fd.fd = -1;
- instance_fill_any(&in->data, tb[INSTANCE_ATTR_DATA]);
- if (!instance_fill_array(&in->env, tb[INSTANCE_ATTR_ENV], NULL, false))
- return false;
- if (!instance_fill_array(&in->netdev, tb[INSTANCE_ATTR_NETDEV], instance_netdev_update, true))
- return false;
- if (!instance_fill_array(&in->file, tb[INSTANCE_ATTR_FILE], instance_file_update, true))
- return false;
- if (!instance_fill_array(&in->limits, tb[INSTANCE_ATTR_LIMITS], NULL, false))
- return false;
- if (!instance_fill_array(&in->errors, tb[INSTANCE_ATTR_ERROR], NULL, true))
- return false;
- return true;
- }
- static void
- instance_config_cleanup(struct service_instance *in)
- {
- blobmsg_list_free(&in->env);
- blobmsg_list_free(&in->data);
- blobmsg_list_free(&in->netdev);
- blobmsg_list_free(&in->file);
- blobmsg_list_free(&in->limits);
- blobmsg_list_free(&in->errors);
- blobmsg_list_free(&in->jail.mount);
- }
- static void
- instance_config_move(struct service_instance *in, struct service_instance *in_src)
- {
- instance_config_cleanup(in);
- blobmsg_list_move(&in->env, &in_src->env);
- blobmsg_list_move(&in->data, &in_src->data);
- blobmsg_list_move(&in->netdev, &in_src->netdev);
- blobmsg_list_move(&in->file, &in_src->file);
- blobmsg_list_move(&in->limits, &in_src->limits);
- blobmsg_list_move(&in->errors, &in_src->errors);
- blobmsg_list_move(&in->jail.mount, &in_src->jail.mount);
- in->trigger = in_src->trigger;
- in->command = in_src->command;
- in->pidfile = in_src->pidfile;
- in->name = in_src->name;
- in->node.avl.key = in_src->node.avl.key;
- free(in->config);
- in->config = in_src->config;
- in_src->config = NULL;
- }
- void
- instance_update(struct service_instance *in, struct service_instance *in_new)
- {
- bool changed = instance_config_changed(in, in_new);
- bool running = in->proc.pending;
- bool stopping = in->halt;
- if (!running || stopping) {
- instance_config_move(in, in_new);
- instance_start(in);
- } else {
- if (changed)
- instance_restart(in);
- instance_config_move(in, in_new);
- /* restart happens in the child callback handler */
- }
- }
- void
- instance_free(struct service_instance *in)
- {
- instance_free_stdio(in);
- uloop_process_delete(&in->proc);
- uloop_timeout_cancel(&in->timeout);
- trigger_del(in);
- watch_del(in);
- instance_config_cleanup(in);
- free(in->config);
- free(in);
- }
- void
- instance_init(struct service_instance *in, struct service *s, struct blob_attr *config)
- {
- config = blob_memdup(config);
- in->srv = s;
- in->name = blobmsg_name(config);
- in->config = config;
- in->timeout.cb = instance_timeout;
- in->proc.cb = instance_exit;
- in->term_timeout = 5;
- in->_stdout.fd.fd = -2;
- in->_stdout.stream.string_data = true;
- in->_stdout.stream.notify_read = instance_stdout;
- in->_stderr.fd.fd = -2;
- in->_stderr.stream.string_data = true;
- in->_stderr.stream.notify_read = instance_stderr;
- blobmsg_list_init(&in->netdev, struct instance_netdev, node, instance_netdev_cmp);
- blobmsg_list_init(&in->file, struct instance_file, node, instance_file_cmp);
- blobmsg_list_simple_init(&in->env);
- blobmsg_list_simple_init(&in->data);
- blobmsg_list_simple_init(&in->limits);
- blobmsg_list_simple_init(&in->errors);
- blobmsg_list_simple_init(&in->jail.mount);
- in->valid = instance_config_parse(in);
- }
- void instance_dump(struct blob_buf *b, struct service_instance *in, int verbose)
- {
- void *i;
- if (!in->valid)
- return;
- i = blobmsg_open_table(b, in->name);
- blobmsg_add_u8(b, "running", in->proc.pending);
- if (in->proc.pending)
- blobmsg_add_u32(b, "pid", in->proc.pid);
- if (in->command)
- blobmsg_add_blob(b, in->command);
- blobmsg_add_u32(b, "term_timeout", in->term_timeout);
- if (!avl_is_empty(&in->errors.avl)) {
- struct blobmsg_list_node *var;
- void *e = blobmsg_open_array(b, "errors");
- blobmsg_list_for_each(&in->errors, var)
- blobmsg_add_string(b, NULL, blobmsg_data(var->data));
- blobmsg_close_table(b, e);
- }
- if (!avl_is_empty(&in->env.avl)) {
- struct blobmsg_list_node *var;
- void *e = blobmsg_open_table(b, "env");
- blobmsg_list_for_each(&in->env, var)
- blobmsg_add_string(b, blobmsg_name(var->data), blobmsg_data(var->data));
- blobmsg_close_table(b, e);
- }
- if (!avl_is_empty(&in->data.avl)) {
- struct blobmsg_list_node *var;
- void *e = blobmsg_open_table(b, "data");
- blobmsg_list_for_each(&in->data, var)
- blobmsg_add_blob(b, var->data);
- blobmsg_close_table(b, e);
- }
- if (!avl_is_empty(&in->limits.avl)) {
- struct blobmsg_list_node *var;
- void *e = blobmsg_open_table(b, "limits");
- blobmsg_list_for_each(&in->limits, var)
- blobmsg_add_string(b, blobmsg_name(var->data), blobmsg_data(var->data));
- blobmsg_close_table(b, e);
- }
- if (in->reload_signal)
- blobmsg_add_u32(b, "reload_signal", in->reload_signal);
- if (in->respawn) {
- void *r = blobmsg_open_table(b, "respawn");
- blobmsg_add_u32(b, "threshold", in->respawn_threshold);
- blobmsg_add_u32(b, "timeout", in->respawn_timeout);
- blobmsg_add_u32(b, "retry", in->respawn_retry);
- blobmsg_close_table(b, r);
- }
- if (in->trace)
- blobmsg_add_u8(b, "trace", true);
- if (in->no_new_privs)
- blobmsg_add_u8(b, "no_new_privs", true);
- if (in->seccomp)
- blobmsg_add_string(b, "seccomp", in->seccomp);
- if (in->pidfile)
- blobmsg_add_string(b, "pidfile", in->pidfile);
- if (in->has_jail) {
- void *r = blobmsg_open_table(b, "jail");
- if (in->jail.name)
- blobmsg_add_string(b, "name", in->jail.name);
- if (in->jail.hostname)
- blobmsg_add_string(b, "hostname", in->jail.hostname);
- blobmsg_add_u8(b, "procfs", in->jail.procfs);
- blobmsg_add_u8(b, "sysfs", in->jail.sysfs);
- blobmsg_add_u8(b, "ubus", in->jail.ubus);
- blobmsg_add_u8(b, "log", in->jail.log);
- blobmsg_add_u8(b, "ronly", in->jail.ronly);
- blobmsg_close_table(b, r);
- if (!avl_is_empty(&in->jail.mount.avl)) {
- struct blobmsg_list_node *var;
- void *e = blobmsg_open_table(b, "mount");
- blobmsg_list_for_each(&in->jail.mount, var)
- blobmsg_add_string(b, blobmsg_name(var->data), blobmsg_data(var->data));
- blobmsg_close_table(b, e);
- }
- }
- if (verbose && in->trigger)
- blobmsg_add_blob(b, in->trigger);
- blobmsg_close_table(b, i);
- }
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