X-Git-Url: https://git.archive.openwrt.org/?p=project%2Fnetifd.git;a=blobdiff_plain;f=main.c;h=3f16cd5d3bb56c364074972a1a491f4f19c8f4d2;hp=dc69abc15c08a6a2bb7b61fc4d70afe46b69fcf6;hb=268149290fcd8a52f377b21226990d3bf0e9c226;hpb=3fa53680c85a6e029a3e7b4d673bffee4795fa52 diff --git a/main.c b/main.c index dc69abc..3f16cd5 100644 --- a/main.c +++ b/main.c @@ -2,46 +2,371 @@ #include #include #include +#include +#include +#include +#include #include "netifd.h" #include "ubus.h" #include "config.h" +#include "system.h" +#include "interface.h" + +unsigned int debug_mask = 0; +const char *main_path = DEFAULT_MAIN_PATH; +const char *resolv_conf = DEFAULT_RESOLV_CONF; +static char **global_argv; + +static struct list_head process_list = LIST_HEAD_INIT(process_list); +static struct list_head fds = LIST_HEAD_INIT(fds); + +#define DEFAULT_LOG_LEVEL L_NOTICE + +static int log_level = DEFAULT_LOG_LEVEL; +static const int log_class[] = { + [L_CRIT] = LOG_CRIT, + [L_WARNING] = LOG_WARNING, + [L_NOTICE] = LOG_NOTICE, + [L_INFO] = LOG_INFO, + [L_DEBUG] = LOG_DEBUG +}; + +#ifdef DUMMY_MODE +#define use_syslog false +#else +static bool use_syslog = true; +#endif + + +static void +netifd_delete_process(struct netifd_process *proc) +{ + if (proc->uloop.pending) + uloop_process_delete(&proc->uloop); + list_del(&proc->list); + netifd_fd_delete(&proc->log_fd); +} + +void +netifd_log_message(int priority, const char *format, ...) +{ + va_list vl; + + if (priority > log_level) + return; + + va_start(vl, format); + if (use_syslog) + vsyslog(log_class[priority], format, vl); + else + vfprintf(stderr, format, vl); + va_end(vl); +} + +static void +netifd_process_log_cb(struct uloop_fd *fd, unsigned int events) +{ + struct netifd_process *proc; + const char *log_prefix; + char *buf, *cur; + int maxlen, len, read_len; + + proc = container_of(fd, struct netifd_process, log_uloop); + + if (!proc->log_buf) + proc->log_buf = malloc(LOG_BUF_SIZE + 1); + + buf = proc->log_buf + proc->log_buf_ofs; + maxlen = LOG_BUF_SIZE - proc->log_buf_ofs; + + log_prefix = proc->log_prefix; + if (!log_prefix) + log_prefix = "process"; + +retry: + read_len = len = read(fd->fd, buf, maxlen); + if (len < 0) { + if (errno == EAGAIN) + goto retry; + + goto out; + } else if (len == 0) + goto out; + + proc->log_buf_ofs += len; + + cur = buf; + buf = proc->log_buf; + while (len > 0 && (cur = memchr(cur, '\n', len))) { + *cur = 0; + + if (!proc->log_overflow) + netifd_log_message(L_NOTICE, "%s (%d): %s\n", + log_prefix, proc->uloop.pid, buf); + else + proc->log_overflow = false; + + cur++; + len -= cur - buf; + buf = cur; + } + + if (buf > proc->log_buf && len > 0) + memmove(buf, proc->log_buf, len); + + if (len == LOG_BUF_SIZE) { + if (!proc->log_overflow) { + proc->log_buf[LOG_BUF_SIZE] = 0; + netifd_log_message(L_NOTICE, "%s (%d): %s [...]\n", + log_prefix, proc->uloop.pid, proc->log_buf); + proc->log_overflow = true; + } + len = 0; + } + proc->log_buf_ofs = len; + + if (read_len == maxlen) + goto retry; + +out: + if (fd->eof) + uloop_fd_delete(fd); +} + +static void +netifd_process_cb(struct uloop_process *proc, int ret) +{ + struct netifd_process *np; + np = container_of(proc, struct netifd_process, uloop); + netifd_process_log_cb(&np->log_uloop, 0); + netifd_delete_process(np); + return np->cb(np, ret); +} + +int +netifd_start_process(const char **argv, char **env, struct netifd_process *proc) +{ + struct netifd_fd *fd; + int pfds[2]; + int pid; + + netifd_kill_process(proc); + + if (pipe(pfds) < 0) + return -1; + + if ((pid = fork()) < 0) + goto error; + + if (!pid) { + if (env) { + while (*env) { + putenv(*env); + env++; + } + } + if (proc->dir_fd >= 0) + fchdir(proc->dir_fd); + + /* close all non-essential fds */ + list_for_each_entry(fd, &fds, list) { + if (fd->proc == proc) + continue; + close(fd->fd); + } + + dup2(pfds[1], 0); + dup2(pfds[1], 1); + dup2(pfds[1], 2); + + close(pfds[0]); + close(pfds[1]); + + execvp(argv[0], (char **) argv); + exit(127); + } + + if (pid < 0) + goto error; + + close(pfds[1]); + proc->uloop.cb = netifd_process_cb; + proc->uloop.pid = pid; + uloop_process_add(&proc->uloop); + list_add_tail(&proc->list, &process_list); + + proc->log_uloop.fd = proc->log_fd.fd = pfds[0]; + proc->log_uloop.cb = netifd_process_log_cb; + netifd_fd_add(&proc->log_fd); + uloop_fd_add(&proc->log_uloop, ULOOP_EDGE_TRIGGER | ULOOP_READ); + + return 0; + +error: + close(pfds[0]); + close(pfds[1]); + return -1; +} + +void +netifd_kill_process(struct netifd_process *proc) +{ + if (!proc->uloop.pending) + return; + + kill(proc->uloop.pid, SIGTERM); + netifd_delete_process(proc); +} + +void +netifd_fd_add(struct netifd_fd *fd) +{ + list_add_tail(&fd->list, &fds); +} + +void +netifd_fd_delete(struct netifd_fd *fd) +{ + list_del(&fd->list); +} + +static void netifd_do_restart(struct uloop_timeout *timeout) +{ + execvp(global_argv[0], global_argv); +} + +static void netifd_do_reload(struct uloop_timeout *timeout) +{ + config_init_all(); +} + +static struct uloop_timeout main_timer; + +void netifd_reload(void) +{ + main_timer.cb = netifd_do_reload; + uloop_timeout_set(&main_timer, 100); +} + +void netifd_restart(void) +{ + main_timer.cb = netifd_do_restart; + interface_set_down(NULL); + uloop_timeout_set(&main_timer, 1000); +} static int usage(const char *progname) { fprintf(stderr, "Usage: %s [options]\n" "Options:\n" + " -d : Mask for debug messages\n" " -s : Path to the ubus socket\n" - "\n", progname); + " -p : Path to netifd addons (default: %s)\n" + " -h : Path to the hotplug script\n" + " -r : Path to resolv.conf\n" + " -l : Log output level (default: %d)\n" + " -S: Use stderr instead of syslog for log messages\n" + " (default: "DEFAULT_HOTPLUG_PATH")\n" + "\n", progname, main_path, DEFAULT_LOG_LEVEL); return 1; } +static void +netifd_handle_signal(int signo) +{ + uloop_end(); +} + +static void +netifd_setup_signals(void) +{ + struct sigaction s; + + memset(&s, 0, sizeof(s)); + s.sa_handler = netifd_handle_signal; + s.sa_flags = 0; + sigaction(SIGINT, &s, NULL); + sigaction(SIGTERM, &s, NULL); + sigaction(SIGUSR1, &s, NULL); + sigaction(SIGUSR2, &s, NULL); + + s.sa_handler = SIG_IGN; + sigaction(SIGPIPE, &s, NULL); +} + +static void +netifd_kill_processes(void) +{ + struct netifd_process *proc, *tmp; + + list_for_each_entry_safe(proc, tmp, &process_list, list) + netifd_kill_process(proc); +} + int main(int argc, char **argv) { const char *socket = NULL; int ch; - while ((ch = getopt(argc, argv, "s:")) != -1) { + global_argv = argv; + + while ((ch = getopt(argc, argv, "d:s:p:h:r:l:S")) != -1) { switch(ch) { + case 'd': + debug_mask = strtoul(optarg, NULL, 0); + break; case 's': socket = optarg; break; + case 'p': + main_path = optarg; + break; + case 'h': + hotplug_cmd_path = optarg; + break; + case 'r': + resolv_conf = optarg; + break; + case 'l': + log_level = atoi(optarg); + if (log_level >= ARRAY_SIZE(log_class)) + log_level = ARRAY_SIZE(log_class) - 1; + break; +#ifndef DUMMY_MODE + case 'S': + use_syslog = false; + break; +#endif default: return usage(argv[0]); } } - if (netifd_ubus_init(NULL) < 0) { + if (use_syslog) + openlog("netifd", 0, LOG_DAEMON); + + netifd_setup_signals(); + if (netifd_ubus_init(socket) < 0) { fprintf(stderr, "Failed to connect to ubus\n"); return 1; } - config_init_interfaces(NULL); + if (system_init()) { + fprintf(stderr, "Failed to initialize system control\n"); + return 1; + } + + config_init_all(); uloop_run(); + netifd_kill_processes(); netifd_ubus_done(); + if (use_syslog) + closelog(); + return 0; }