Add missing pieces from vodz' last_patch88

3 files changed, 203 insertions, 0 deletions

diff --git a/networking/udhcp/common.c b/networking/udhcp/common.c
new file mode 100644
index 000000000..c01cd5765
--- /dev/null
+++ b/networking/udhcp/common.c
@@ -0,0 +1,150 @@
+/* common.c
+ *
+ * Functions to assist in the writing and removing of pidfiles.
+ *
+ * Russ Dill <Russ.Dill@asu.edu> Soptember 2001
+ * Rewrited by Vladimir Oleynik <dzo@simtreas.ru> (C) 2003
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <sys/socket.h>
+
+#include "common.h"
+
+
+static int daemonized;
+
+#ifdef CONFIG_FEATURE_UDHCP_SYSLOG
+
+void udhcp_logging(int level, const char *fmt, ...)
+{
+        int e = errno;
+        va_list p;
+        va_list p2;
+
+        va_start(p, fmt);
+        __va_copy(p2, p);
+        if(!daemonized) {
+                vprintf(fmt, p);
+                putchar('\n');
+                errno = e;
+        }
+        vsyslog(level, fmt, p2);
+        va_end(p);
+}
+
+void start_log(const char *client_server)
+{
+        openlog(bb_applet_name, LOG_PID | LOG_CONS, LOG_LOCAL0);
+        udhcp_logging(LOG_INFO, "%s (v%s) started", client_server, VERSION);
+}
+
+#else
+
+static char *syslog_level_msg[] = {
+        [LOG_EMERG]   = "EMERGENCY!",
+        [LOG_ALERT]   = "ALERT!",
+        [LOG_CRIT]    = "critical!",
+        [LOG_WARNING] = "warning",
+        [LOG_ERR]     = "error",
+        [LOG_INFO]    = "info",
+        [LOG_DEBUG]   = "debug"
+};
+
+void udhcp_logging(int level, const char *fmt, ...)
+{
+        int e = errno;
+        va_list p;
+
+        va_start(p, fmt);
+        if(!daemonized) {
+                printf("%s, ", syslog_level_msg[level]);
+                errno = e;
+                vprintf(fmt, p);
+                putchar('\n');
+        }
+        va_end(p);
+}
+
+void start_log(const char *client_server)
+{
+        udhcp_logging(LOG_INFO, "%s (v%s) started", client_server, VERSION);
+}
+#endif
+
+static const char *saved_pidfile;
+
+static void exit_fun(void)
+{
+        if (saved_pidfile) unlink(saved_pidfile);
+}
+
+void background(const char *pidfile)
+{
+        int pid_fd = -1;
+
+        if (pidfile) {
+                pid_fd = open(pidfile, O_CREAT | O_WRONLY, 0644);
+                if (pid_fd < 0) {
+                        LOG(LOG_ERR, "Unable to open pidfile %s: %m", pidfile);
+                } else {
+                        lockf(pid_fd, F_LOCK, 0);
+                        if(!saved_pidfile)
+                                atexit(exit_fun);       /* set atexit one only */
+                        saved_pidfile = pidfile;        /* but may be rewrite */
+                }
+        }
+        while (pid_fd >= 0 && pid_fd < 3) pid_fd = dup(pid_fd); /* don't let daemon close it */
+        if (daemon(0, 0) == -1) {
+                perror("fork");
+                exit(1);
+        }
+        daemonized++;
+        if (pid_fd >= 0) {
+                FILE *out;
+
+                if ((out = fdopen(pid_fd, "w")) != NULL) {
+                        fprintf(out, "%d\n", getpid());
+                        fclose(out);
+                }
+                lockf(pid_fd, F_UNLCK, 0);
+                close(pid_fd);
+        }
+}
+
+/* Signal handler */
+int udhcp_signal_pipe[2];
+static void signal_handler(int sig)
+{
+        if (send(udhcp_signal_pipe[1], &sig, sizeof(sig), MSG_DONTWAIT) < 0) {
+                LOG(LOG_ERR, "Could not send signal: %m");
+        }
+}
+
+void udhcp_set_signal_pipe(int sig_add)
+{
+        socketpair(AF_UNIX, SOCK_STREAM, 0, udhcp_signal_pipe);
+        signal(SIGUSR1, signal_handler);
+        signal(SIGTERM, signal_handler);
+        if(sig_add)
+                signal(sig_add, signal_handler);
+}
diff --git a/networking/udhcp/common.h b/networking/udhcp/common.h
new file mode 100644
index 000000000..768f551b0
--- /dev/null
+++ b/networking/udhcp/common.h
@@ -0,0 +1,52 @@
+/* common.h
+ *
+ * Russ Dill <Russ.Dill@asu.edu> Soptember 2001
+ * Rewrited by Vladimir Oleynik <dzo@simtreas.ru> (C) 2003
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "version.h"
+#include "busybox.h"
+
+#ifndef CONFIG_FEATURE_UDHCP_SYSLOG
+enum syslog_levels {
+        LOG_EMERG = 0,
+        LOG_ALERT,
+        LOG_CRIT,
+        LOG_WARNING,
+        LOG_ERR,
+        LOG_INFO,
+        LOG_DEBUG
+};
+#else
+#include <syslog.h>
+#endif
+
+void start_log(const char *client_server);
+void background(const char *pidfile);
+void udhcp_logging(int level, const char *fmt, ...);
+
+extern int udhcp_signal_pipe[2];
+void udhcp_set_signal_pipe(int sig_add);
+
+
+#define LOG(level, str, args...) udhcp_logging(level, str, ## args)
+
+#ifdef CONFIG_FEATURE_UDHCP_DEBUG
+# define DEBUG(level, str, args...) udhcp_logging(level, str, ## args)
+#else
+# define DEBUG(level, str, args...) do {;} while(0)
+#endif
diff --git a/networking/udhcp/leases_file.c b/networking/udhcp/leases_file.c
new file mode 100644
index 000000000..96e2f2d1b
--- /dev/null
+++ b/networking/udhcp/leases_file.c
@@ -0,0 +1 @@
+const char leases_file[] = "/var/lib/misc/udhcpd.leases";