From a8da17acefe5fb16f9f55bb50d36484befb73f22 Mon Sep 17 00:00:00 2001 From: Eric Andersen Date: Sat, 14 Jun 2003 02:57:53 +0000 Subject: [PATCH] Add missing pieces from vodz' last_patch88 --- networking/udhcp/common.c | 150 +++++++++++++++++++++++++++++++++ networking/udhcp/common.h | 52 ++++++++++++ networking/udhcp/leases_file.c | 1 + 3 files changed, 203 insertions(+) create mode 100644 networking/udhcp/common.c create mode 100644 networking/udhcp/common.h create mode 100644 networking/udhcp/leases_file.c 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 Soptember 2001 + * Rewrited by Vladimir Oleynik (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 +#include +#include +#include +#include +#include +#include + +#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 Soptember 2001 + * Rewrited by Vladimir Oleynik (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 +#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";