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-rw-r--r--serialclient.c255
1 files changed, 255 insertions, 0 deletions
diff --git a/serialclient.c b/serialclient.c
new file mode 100644
index 0000000..1e5adb8
--- /dev/null
+++ b/serialclient.c
@@ -0,0 +1,255 @@
+/*
+ * rhctl
+ *
+ * Copyright (C) 2009 Christian Pointner <equinox@spreadspace.org>
+ *
+ * This file is part of rhctl.
+ *
+ * rhctl is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * any later version.
+ *
+ * rhctl 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with rhctl. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "datatypes.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+#include "log.h"
+#include "sig_handler.h"
+#include "options.h"
+
+#include "daemon.h"
+#include "utils.h"
+
+int process_data(int src_fd, int dest_fd)
+{
+ char* buffer[100];
+ int ret = read(src_fd, buffer, 100);
+ if(!ret)
+ return 2;
+ if(ret == -1 && errno == EAGAIN)
+ return 0;
+ if(ret < 0)
+ return ret;
+
+ int len = ret;
+ int offset = 0;
+ for(;;) {
+ ret = write(dest_fd, &buffer[offset], len - offset);
+ if(ret < 0) {
+ if(errno != EINTR)
+ return ret;
+
+ ret = 0;
+ }
+
+ offset += ret;
+ if(offset+1 >= len)
+ break;
+ }
+ return ret;
+}
+
+int main_loop(int serial_fd, int cmd_fd, options_t* opt)
+{
+ log_printf(NOTICE, "entering main loop");
+
+ fd_set readfds, tmpfds;
+ FD_ZERO(&readfds);
+ FD_SET(serial_fd, &readfds);
+ FD_SET(cmd_fd, &readfds);
+ int max_fd = serial_fd > cmd_fd ? serial_fd : cmd_fd;
+
+ int sig_fd = signal_init();
+ if(sig_fd < 0)
+ return -1;
+ FD_SET(sig_fd, &readfds);
+ max_fd = (max_fd < sig_fd) ? sig_fd : max_fd;
+
+ int return_value = 0;
+
+ return_value = send_string(cmd_fd, opt->type);
+
+ while(!return_value) {
+ memcpy(&tmpfds, &readfds, sizeof(tmpfds));
+
+ int ret = select(max_fd+1, &tmpfds, NULL, NULL, NULL);
+ if(ret == -1 && errno != EINTR) {
+ log_printf(ERROR, "select returned with error: %s", strerror(errno));
+ return_value = -1;
+ break;
+ }
+ if(ret == -1 || !ret)
+ continue;
+
+ if(FD_ISSET(sig_fd, &tmpfds)) {
+ if(signal_handle()) {
+ return_value = 1;
+ break;
+ }
+ }
+
+ if(FD_ISSET(serial_fd, &tmpfds)) {
+ return_value = process_data(serial_fd, cmd_fd);
+ if(return_value)
+ break;
+ }
+
+ if(FD_ISSET(cmd_fd, &tmpfds)) {
+ return_value = process_data(cmd_fd, serial_fd);
+ }
+ }
+
+ signal_stop();
+ return return_value;
+}
+
+int main(int argc, char* argv[])
+{
+ log_init();
+
+ options_t opt;
+ int ret = options_parse(&opt, argc, argv);
+ if(ret) {
+ if(ret > 0) {
+ fprintf(stderr, "syntax error near: %s\n\n", argv[ret]);
+ }
+ if(ret == -2) {
+ fprintf(stderr, "memory error on options_parse, exiting\n");
+ }
+
+ if(ret != -2)
+ options_print_usage();
+
+ options_clear(&opt);
+ log_close();
+ exit(ret);
+ }
+ string_list_element_t* tmp = opt.log_targets_.first_;
+ if(!tmp) {
+ log_add_target("syslog:3,serialclient,daemon");
+ }
+ else {
+ while(tmp) {
+ ret = log_add_target(tmp->string_);
+ if(ret) {
+ switch(ret) {
+ case -2: fprintf(stderr, "memory error on log_add_target, exitting\n"); break;
+ case -3: fprintf(stderr, "unknown log target: '%s', exitting\n", tmp->string_); break;
+ case -4: fprintf(stderr, "this log target is only allowed once: '%s', exitting\n", tmp->string_); break;
+ default: fprintf(stderr, "syntax error near: '%s', exitting\n", tmp->string_); break;
+ }
+
+ options_clear(&opt);
+ log_close();
+ exit(ret);
+ }
+ tmp = tmp->next_;
+ }
+ }
+ log_printf(NOTICE, "just started...");
+ if(options_parse_post(&opt)) {
+ options_clear(&opt);
+ log_close();
+ exit(-1);
+ }
+
+ priv_info_t priv;
+ if(opt.username_)
+ if(priv_init(&priv, opt.username_, opt.groupname_)) {
+ options_clear(&opt);
+ log_close();
+ exit(-1);
+ }
+
+ FILE* pid_file = NULL;
+ if(opt.pid_file_) {
+ pid_file = fopen(opt.pid_file_, "w");
+ if(!pid_file) {
+ log_printf(WARNING, "unable to open pid file: %s", strerror(errno));
+ }
+ }
+
+ if(opt.chroot_dir_)
+ if(do_chroot(opt.chroot_dir_)) {
+ options_clear(&opt);
+ log_close();
+ exit(-1);
+ }
+ if(opt.username_)
+ if(priv_drop(&priv)) {
+ options_clear(&opt);
+ log_close();
+ exit(-1);
+ }
+
+ if(opt.daemonize_) {
+ pid_t oldpid = getpid();
+ daemonize();
+ log_printf(INFO, "running in background now (old pid: %d)", oldpid);
+ }
+
+ if(pid_file) {
+ pid_t pid = getpid();
+ fprintf(pid_file, "%d", pid);
+ fclose(pid_file);
+ }
+
+ int cmd_fd = init_command_socket(opt.command_sock_);
+ if(cmd_fd < 0) {
+ options_clear(&opt);
+ log_close();
+ exit(-1);
+ }
+
+ int serial_fd = 0;
+ for(;;) {
+ serial_fd = open(opt.serial_dev_, O_RDWR | O_NOCTTY);
+ if(serial_fd < 0)
+ ret = 2;
+ else {
+ ret = setup_tty(serial_fd, B38400);
+ if(ret)
+ ret = 2;
+ else
+ ret = main_loop(serial_fd, cmd_listen_fd, &opt);
+ }
+
+ if(ret == 2) {
+ log_printf(ERROR, "%s error, trying to reopen in 5 seconds..", opt.serial_dev_);
+ if(serial_fd > 0)
+ close(serial_fd);
+ sleep(5);
+ }
+ else
+ break;
+ }
+
+ close(cmd_listen_fd);
+ if(serial_fd > 0)
+ close(serial_fd);
+
+ if(!ret)
+ log_printf(NOTICE, "normal shutdown");
+ else if(ret < 0)
+ log_printf(NOTICE, "shutdown after error");
+ else
+ log_printf(NOTICE, "shutdown after signal");
+
+ options_clear(&opt);
+ log_close();
+
+ return ret;
+}