[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Mini syslogd implementation for busybox
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| 4 | *
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| 5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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| 6 | *
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| 7 | * Copyright (C) 2000 by Karl M. Hegbloom <karlheg@debian.org>
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| 8 | *
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| 9 | * "circular buffer" Copyright (C) 2001 by Gennady Feldman <gfeldman@gena01.com>
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| 10 | *
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| 11 | * Maintainer: Gennady Feldman <gfeldman@gena01.com> as of Mar 12, 2001
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| 12 | *
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| 13 | * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
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| 14 | */
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| 15 |
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| 16 | #include "busybox.h"
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| 17 | #include <stdio.h>
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| 18 | #include <stdlib.h>
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| 19 | #include <ctype.h>
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| 20 | #include <errno.h>
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| 21 | #include <fcntl.h>
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| 22 | #include <getopt.h>
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| 23 | #include <netdb.h>
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| 24 | #include <paths.h>
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| 25 | #include <signal.h>
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| 26 | #include <stdarg.h>
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| 27 | #include <stdbool.h>
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| 28 | #include <time.h>
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| 29 | #include <string.h>
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| 30 | #include <unistd.h>
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| 31 | #include <sys/socket.h>
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| 32 | #include <sys/types.h>
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| 33 | #include <sys/un.h>
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| 34 | #include <sys/param.h>
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| 35 |
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| 36 | /* SYSLOG_NAMES defined to pull some extra junk from syslog.h */
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| 37 | #define SYSLOG_NAMES
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| 38 | #include <sys/syslog.h>
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| 39 | #include <sys/uio.h>
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| 40 |
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| 41 | /* Path for the file where all log messages are written */
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| 42 | #define __LOG_FILE "/var/log/messages"
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| 43 |
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| 44 | /* Path to the unix socket */
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| 45 | static char lfile[MAXPATHLEN];
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| 46 |
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| 47 | static const char *logFilePath = __LOG_FILE;
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| 48 |
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| 49 | #ifdef CONFIG_FEATURE_ROTATE_LOGFILE
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| 50 | /* max size of message file before being rotated */
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| 51 | static int logFileSize = 200 * 1024;
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| 52 |
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| 53 | /* number of rotated message files */
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| 54 | static int logFileRotate = 1;
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| 55 | #endif
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| 56 |
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| 57 | /* interval between marks in seconds */
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| 58 | static int MarkInterval = 20 * 60;
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| 59 |
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| 60 | /* localhost's name */
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| 61 | static char LocalHostName[64];
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| 62 |
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| 63 | #ifdef CONFIG_FEATURE_REMOTE_LOG
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| 64 | #include <netinet/in.h>
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| 65 | /* udp socket for logging to remote host */
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| 66 | static int remotefd = -1;
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| 67 | static struct sockaddr_in remoteaddr;
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| 68 |
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| 69 | /* where do we log? */
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| 70 | static char *RemoteHost;
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| 71 |
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| 72 | /* what port to log to? */
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| 73 | static int RemotePort = 514;
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| 74 |
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| 75 | /* To remote log or not to remote log, that is the question. */
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| 76 | static int doRemoteLog = FALSE;
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| 77 | static int local_logging = FALSE;
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| 78 | #endif
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| 79 |
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| 80 | /* Make loging output smaller. */
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| 81 | static bool small = false;
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| 82 |
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| 83 |
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| 84 | #define MAXLINE 1024 /* maximum line length */
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| 85 |
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| 86 |
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| 87 | /* circular buffer variables/structures */
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| 88 | #ifdef CONFIG_FEATURE_IPC_SYSLOG
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| 89 |
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| 90 | #if CONFIG_FEATURE_IPC_SYSLOG_BUFFER_SIZE < 4
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| 91 | #error Sorry, you must set the syslogd buffer size to at least 4KB.
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| 92 | #error Please check CONFIG_FEATURE_IPC_SYSLOG_BUFFER_SIZE
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| 93 | #endif
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| 94 |
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| 95 | #include <sys/ipc.h>
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| 96 | #include <sys/sem.h>
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| 97 | #include <sys/shm.h>
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| 98 |
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| 99 | /* our shared key */
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| 100 | static const long KEY_ID = 0x414e4547; /*"GENA" */
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| 101 |
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| 102 | // Semaphore operation structures
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| 103 | static struct shbuf_ds {
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| 104 | int size; // size of data written
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| 105 | int head; // start of message list
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| 106 | int tail; // end of message list
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| 107 | char data[1]; // data/messages
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| 108 | } *buf = NULL; // shared memory pointer
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| 109 |
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| 110 | static struct sembuf SMwup[1] = { {1, -1, IPC_NOWAIT} }; // set SMwup
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| 111 | static struct sembuf SMwdn[3] = { {0, 0}, {1, 0}, {1, +1} }; // set SMwdn
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| 112 |
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| 113 | static int shmid = -1; // ipc shared memory id
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| 114 | static int s_semid = -1; // ipc semaphore id
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| 115 | static int shm_size = ((CONFIG_FEATURE_IPC_SYSLOG_BUFFER_SIZE)*1024); // default shm size
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| 116 | static int circular_logging = FALSE;
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| 117 |
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| 118 | /*
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| 119 | * sem_up - up()'s a semaphore.
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| 120 | */
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| 121 | static inline void sem_up(int semid)
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| 122 | {
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| 123 | if (semop(semid, SMwup, 1) == -1) {
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| 124 | bb_perror_msg_and_die("semop[SMwup]");
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| 125 | }
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| 126 | }
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| 127 |
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| 128 | /*
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| 129 | * sem_down - down()'s a semaphore
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| 130 | */
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| 131 | static inline void sem_down(int semid)
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| 132 | {
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| 133 | if (semop(semid, SMwdn, 3) == -1) {
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| 134 | bb_perror_msg_and_die("semop[SMwdn]");
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| 135 | }
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| 136 | }
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| 137 |
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| 138 |
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| 139 | static void ipcsyslog_cleanup(void)
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| 140 | {
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| 141 | printf("Exiting Syslogd!\n");
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| 142 | if (shmid != -1) {
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| 143 | shmdt(buf);
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| 144 | }
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| 145 |
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| 146 | if (shmid != -1) {
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| 147 | shmctl(shmid, IPC_RMID, NULL);
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| 148 | }
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| 149 | if (s_semid != -1) {
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| 150 | semctl(s_semid, 0, IPC_RMID, 0);
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| 151 | }
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| 152 | }
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| 153 |
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| 154 | static void ipcsyslog_init(void)
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| 155 | {
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| 156 | if (buf == NULL) {
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| 157 | if ((shmid = shmget(KEY_ID, shm_size, IPC_CREAT | 1023)) == -1) {
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| 158 | bb_perror_msg_and_die("shmget");
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| 159 | }
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| 160 |
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| 161 | if ((buf = shmat(shmid, NULL, 0)) == NULL) {
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| 162 | bb_perror_msg_and_die("shmat");
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| 163 | }
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| 164 |
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| 165 | buf->size = shm_size - sizeof(*buf);
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| 166 | buf->head = buf->tail = 0;
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| 167 |
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| 168 | // we'll trust the OS to set initial semval to 0 (let's hope)
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| 169 | if ((s_semid = semget(KEY_ID, 2, IPC_CREAT | IPC_EXCL | 1023)) == -1) {
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| 170 | if (errno == EEXIST) {
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| 171 | if ((s_semid = semget(KEY_ID, 2, 0)) == -1) {
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| 172 | bb_perror_msg_and_die("semget");
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| 173 | }
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| 174 | } else {
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| 175 | bb_perror_msg_and_die("semget");
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| 176 | }
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| 177 | }
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| 178 | } else {
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| 179 | printf("Buffer already allocated just grab the semaphore?");
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| 180 | }
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| 181 | }
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| 182 |
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| 183 | /* write message to buffer */
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| 184 | static void circ_message(const char *msg)
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| 185 | {
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| 186 | int l = strlen(msg) + 1; /* count the whole message w/ '\0' included */
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| 187 |
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| 188 | sem_down(s_semid);
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| 189 |
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| 190 | /*
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| 191 | * Circular Buffer Algorithm:
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| 192 | * --------------------------
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| 193 | *
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| 194 | * Start-off w/ empty buffer of specific size SHM_SIZ
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| 195 | * Start filling it up w/ messages. I use '\0' as separator to break up messages.
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| 196 | * This is also very handy since we can do printf on message.
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| 197 | *
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| 198 | * Once the buffer is full we need to get rid of the first message in buffer and
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| 199 | * insert the new message. (Note: if the message being added is >1 message then
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| 200 | * we will need to "remove" >1 old message from the buffer). The way this is done
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| 201 | * is the following:
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| 202 | * When we reach the end of the buffer we set a mark and start from the beginning.
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| 203 | * Now what about the beginning and end of the buffer? Well we have the "head"
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| 204 | * index/pointer which is the starting point for the messages and we have "tail"
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| 205 | * index/pointer which is the ending point for the messages. When we "display" the
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| 206 | * messages we start from the beginning and continue until we reach "tail". If we
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| 207 | * reach end of buffer, then we just start from the beginning (offset 0). "head" and
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| 208 | * "tail" are actually offsets from the beginning of the buffer.
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| 209 | *
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| 210 | * Note: This algorithm uses Linux IPC mechanism w/ shared memory and semaphores to provide
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| 211 | * a threadsafe way of handling shared memory operations.
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| 212 | */
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| 213 | if ((buf->tail + l) < buf->size) {
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| 214 | /* before we append the message we need to check the HEAD so that we won't
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| 215 | overwrite any of the message that we still need and adjust HEAD to point
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| 216 | to the next message! */
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| 217 | if (buf->tail < buf->head) {
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| 218 | if ((buf->tail + l) >= buf->head) {
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| 219 | /* we need to move the HEAD to point to the next message
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| 220 | * Theoretically we have enough room to add the whole message to the
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| 221 | * buffer, because of the first outer IF statement, so we don't have
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| 222 | * to worry about overflows here!
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| 223 | */
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| 224 | int k = buf->tail + l - buf->head; /* we need to know how many bytes
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| 225 | we are overwriting to make
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| 226 | enough room */
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| 227 | char *c =
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| 228 | memchr(buf->data + buf->head + k, '\0',
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| 229 | buf->size - (buf->head + k));
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| 230 | if (c != NULL) { /* do a sanity check just in case! */
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| 231 | buf->head = c - buf->data + 1; /* we need to convert pointer to
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| 232 | offset + skip the '\0' since
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| 233 | we need to point to the beginning
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| 234 | of the next message */
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| 235 | /* Note: HEAD is only used to "retrieve" messages, it's not used
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| 236 | when writing messages into our buffer */
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| 237 | } else { /* show an error message to know we messed up? */
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| 238 | printf("Weird! Can't find the terminator token?\n");
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| 239 | buf->head = 0;
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| 240 | }
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| 241 | }
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| 242 | }
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| 243 |
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| 244 | /* in other cases no overflows have been done yet, so we don't care! */
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| 245 | /* we should be ok to append the message now */
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| 246 | strncpy(buf->data + buf->tail, msg, l); /* append our message */
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| 247 | buf->tail += l; /* count full message w/ '\0' terminating char */
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| 248 | } else {
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| 249 | /* we need to break up the message and "circle" it around */
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| 250 | char *c;
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| 251 | int k = buf->tail + l - buf->size; /* count # of bytes we don't fit */
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| 252 |
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| 253 | /* We need to move HEAD! This is always the case since we are going
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| 254 | * to "circle" the message.
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| 255 | */
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| 256 | c = memchr(buf->data + k, '\0', buf->size - k);
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| 257 |
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| 258 | if (c != NULL) { /* if we don't have '\0'??? weird!!! */
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| 259 | /* move head pointer */
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| 260 | buf->head = c - buf->data + 1;
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| 261 |
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| 262 | /* now write the first part of the message */
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| 263 | strncpy(buf->data + buf->tail, msg, l - k - 1);
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| 264 |
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| 265 | /* ALWAYS terminate end of buffer w/ '\0' */
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| 266 | buf->data[buf->size - 1] = '\0';
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| 267 |
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| 268 | /* now write out the rest of the string to the beginning of the buffer */
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| 269 | strcpy(buf->data, &msg[l - k - 1]);
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| 270 |
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| 271 | /* we need to place the TAIL at the end of the message */
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| 272 | buf->tail = k + 1;
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| 273 | } else {
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| 274 | printf
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| 275 | ("Weird! Can't find the terminator token from the beginning?\n");
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| 276 | buf->head = buf->tail = 0; /* reset buffer, since it's probably corrupted */
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| 277 | }
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| 278 |
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| 279 | }
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| 280 | sem_up(s_semid);
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| 281 | }
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| 282 | #endif /* CONFIG_FEATURE_IPC_SYSLOG */
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| 283 |
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| 284 | /* Note: There is also a function called "message()" in init.c */
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| 285 | /* Print a message to the log file. */
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| 286 | static void message(char *fmt, ...) __attribute__ ((format(printf, 1, 2)));
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| 287 | static void message(char *fmt, ...)
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| 288 | {
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| 289 | int fd;
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| 290 | struct flock fl;
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| 291 | va_list arguments;
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| 292 |
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| 293 | fl.l_whence = SEEK_SET;
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| 294 | fl.l_start = 0;
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| 295 | fl.l_len = 1;
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| 296 |
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| 297 | #ifdef CONFIG_FEATURE_IPC_SYSLOG
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| 298 | if ((circular_logging == TRUE) && (buf != NULL)) {
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| 299 | char b[1024];
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| 300 |
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| 301 | va_start(arguments, fmt);
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| 302 | vsnprintf(b, sizeof(b) - 1, fmt, arguments);
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| 303 | va_end(arguments);
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| 304 | circ_message(b);
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| 305 |
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| 306 | } else
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| 307 | #endif
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| 308 | if ((fd = device_open(logFilePath,
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| 309 | O_WRONLY | O_CREAT | O_NOCTTY | O_APPEND |
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| 310 | O_NONBLOCK)) >= 0) {
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| 311 | fl.l_type = F_WRLCK;
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| 312 | fcntl(fd, F_SETLKW, &fl);
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| 313 | #ifdef CONFIG_FEATURE_ROTATE_LOGFILE
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| 314 | if ( logFileSize > 0 ) {
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| 315 | struct stat statf;
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| 316 | int r = fstat(fd, &statf);
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| 317 | if( !r && (statf.st_mode & S_IFREG)
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| 318 | && (lseek(fd,0,SEEK_END) > logFileSize) ) {
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| 319 | if(logFileRotate > 0) {
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| 320 | int i;
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| 321 | char oldFile[(strlen(logFilePath)+4)], newFile[(strlen(logFilePath)+4)];
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| 322 | for(i=logFileRotate-1;i>0;i--) {
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| 323 | sprintf(oldFile, "%s.%d", logFilePath, i-1);
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| 324 | sprintf(newFile, "%s.%d", logFilePath, i);
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| 325 | rename(oldFile, newFile);
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| 326 | }
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| 327 | sprintf(newFile, "%s.%d", logFilePath, 0);
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| 328 | fl.l_type = F_UNLCK;
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| 329 | fcntl (fd, F_SETLKW, &fl);
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| 330 | close(fd);
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| 331 | rename(logFilePath, newFile);
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| 332 | fd = device_open (logFilePath,
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| 333 | O_WRONLY | O_CREAT | O_NOCTTY | O_APPEND |
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| 334 | O_NONBLOCK);
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| 335 | fl.l_type = F_WRLCK;
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| 336 | fcntl (fd, F_SETLKW, &fl);
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| 337 | } else {
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| 338 | ftruncate( fd, 0 );
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| 339 | }
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| 340 | }
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| 341 | }
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| 342 | #endif
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| 343 | va_start(arguments, fmt);
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| 344 | vdprintf(fd, fmt, arguments);
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| 345 | va_end(arguments);
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| 346 | fl.l_type = F_UNLCK;
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| 347 | fcntl(fd, F_SETLKW, &fl);
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| 348 | close(fd);
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| 349 | } else {
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| 350 | /* Always send console messages to /dev/console so people will see them. */
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| 351 | if ((fd = device_open(_PATH_CONSOLE,
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| 352 | O_WRONLY | O_NOCTTY | O_NONBLOCK)) >= 0) {
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| 353 | va_start(arguments, fmt);
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| 354 | vdprintf(fd, fmt, arguments);
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| 355 | va_end(arguments);
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| 356 | close(fd);
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| 357 | } else {
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| 358 | fprintf(stderr, "Bummer, can't print: ");
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| 359 | va_start(arguments, fmt);
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| 360 | vfprintf(stderr, fmt, arguments);
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| 361 | fflush(stderr);
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| 362 | va_end(arguments);
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| 363 | }
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| 364 | }
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| 365 | }
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| 366 |
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| 367 | #ifdef CONFIG_FEATURE_REMOTE_LOG
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| 368 | static void init_RemoteLog(void)
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| 369 | {
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| 370 | memset(&remoteaddr, 0, sizeof(remoteaddr));
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| 371 | remotefd = bb_xsocket(AF_INET, SOCK_DGRAM, 0);
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| 372 | remoteaddr.sin_family = AF_INET;
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| 373 | remoteaddr.sin_addr = *(struct in_addr *) *(xgethostbyname(RemoteHost))->h_addr_list;
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| 374 | remoteaddr.sin_port = htons(RemotePort);
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| 375 | }
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| 376 | #endif
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| 377 |
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| 378 | static void logMessage(int pri, char *msg)
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| 379 | {
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| 380 | time_t now;
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| 381 | char *timestamp;
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| 382 | static char res[20];
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| 383 | #ifdef CONFIG_FEATURE_REMOTE_LOG
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| 384 | static char line[MAXLINE + 1];
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| 385 | #endif
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| 386 | CODE *c_pri, *c_fac;
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| 387 |
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| 388 | if (pri != 0) {
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| 389 | for (c_fac = facilitynames;
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| 390 | c_fac->c_name && !(c_fac->c_val == LOG_FAC(pri) << 3); c_fac++);
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| 391 | for (c_pri = prioritynames;
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| 392 | c_pri->c_name && !(c_pri->c_val == LOG_PRI(pri)); c_pri++);
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| 393 | if (c_fac->c_name == NULL || c_pri->c_name == NULL) {
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| 394 | snprintf(res, sizeof(res), "<%d>", pri);
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| 395 | } else {
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| 396 | snprintf(res, sizeof(res), "%s.%s", c_fac->c_name, c_pri->c_name);
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| 397 | }
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| 398 | }
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| 399 |
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| 400 | if (strlen(msg) < 16 || msg[3] != ' ' || msg[6] != ' ' ||
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| 401 | msg[9] != ':' || msg[12] != ':' || msg[15] != ' ') {
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| 402 | time(&now);
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| 403 | timestamp = ctime(&now) + 4;
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| 404 | timestamp[15] = '\0';
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| 405 | } else {
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| 406 | timestamp = msg;
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| 407 | timestamp[15] = '\0';
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| 408 | msg += 16;
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| 409 | }
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| 410 |
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| 411 | /* todo: supress duplicates */
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| 412 |
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| 413 | #ifdef CONFIG_FEATURE_REMOTE_LOG
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| 414 | if (doRemoteLog == TRUE) {
|
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| 415 | /* trying connect the socket */
|
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| 416 | if (-1 == remotefd) {
|
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| 417 | init_RemoteLog();
|
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| 418 | }
|
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| 419 |
|
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| 420 | /* if we have a valid socket, send the message */
|
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| 421 | if (-1 != remotefd) {
|
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| 422 | now = 1;
|
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| 423 | snprintf(line, sizeof(line), "<%d>%s", pri, msg);
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| 424 |
|
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| 425 | retry:
|
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| 426 | /* send message to remote logger */
|
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| 427 | if(( -1 == sendto(remotefd, line, strlen(line), 0,
|
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| 428 | (struct sockaddr *) &remoteaddr,
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| 429 | sizeof(remoteaddr))) && (errno == EINTR)) {
|
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| 430 | /* sleep now seconds and retry (with now * 2) */
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| 431 | sleep(now);
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| 432 | now *= 2;
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| 433 | goto retry;
|
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| 434 | }
|
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| 435 | }
|
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| 436 | }
|
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| 437 |
|
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| 438 | if (local_logging == TRUE)
|
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| 439 | #endif
|
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| 440 | {
|
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| 441 | /* now spew out the message to wherever it is supposed to go */
|
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| 442 | if (small)
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| 443 | message("%s %s\n", timestamp, msg);
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| 444 | else
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| 445 | message("%s %s %s %s\n", timestamp, LocalHostName, res, msg);
|
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| 446 | }
|
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| 447 | }
|
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| 448 |
|
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| 449 | static void quit_signal(int sig)
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| 450 | {
|
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| 451 | logMessage(LOG_SYSLOG | LOG_INFO, "System log daemon exiting.");
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| 452 | unlink(lfile);
|
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| 453 | #ifdef CONFIG_FEATURE_IPC_SYSLOG
|
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| 454 | ipcsyslog_cleanup();
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| 455 | #endif
|
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| 456 |
|
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| 457 | exit(TRUE);
|
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| 458 | }
|
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| 459 |
|
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| 460 | static void domark(int sig)
|
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| 461 | {
|
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| 462 | if (MarkInterval > 0) {
|
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| 463 | logMessage(LOG_SYSLOG | LOG_INFO, "-- MARK --");
|
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| 464 | alarm(MarkInterval);
|
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| 465 | }
|
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| 466 | }
|
---|
| 467 |
|
---|
| 468 | /* This must be a #define, since when CONFIG_DEBUG and BUFFERS_GO_IN_BSS are
|
---|
| 469 | * enabled, we otherwise get a "storage size isn't constant error. */
|
---|
| 470 | static int serveConnection(char *tmpbuf, int n_read)
|
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| 471 | {
|
---|
| 472 | char *p = tmpbuf;
|
---|
| 473 |
|
---|
| 474 | while (p < tmpbuf + n_read) {
|
---|
| 475 |
|
---|
| 476 | int pri = (LOG_USER | LOG_NOTICE);
|
---|
| 477 | int num_lt = 0;
|
---|
| 478 | char line[MAXLINE + 1];
|
---|
| 479 | unsigned char c;
|
---|
| 480 | char *q = line;
|
---|
| 481 |
|
---|
| 482 | while ((c = *p) && q < &line[sizeof(line) - 1]) {
|
---|
| 483 | if (c == '<' && num_lt == 0) {
|
---|
| 484 | /* Parse the magic priority number. */
|
---|
| 485 | num_lt++;
|
---|
| 486 | pri = 0;
|
---|
| 487 | while (isdigit(*(++p))) {
|
---|
| 488 | pri = 10 * pri + (*p - '0');
|
---|
| 489 | }
|
---|
| 490 | if (pri & ~(LOG_FACMASK | LOG_PRIMASK)) {
|
---|
| 491 | pri = (LOG_USER | LOG_NOTICE);
|
---|
| 492 | }
|
---|
| 493 | } else if (c == '\n') {
|
---|
| 494 | *q++ = ' ';
|
---|
| 495 | } else if (iscntrl(c) && (c < 0177)) {
|
---|
| 496 | *q++ = '^';
|
---|
| 497 | *q++ = c ^ 0100;
|
---|
| 498 | } else {
|
---|
| 499 | *q++ = c;
|
---|
| 500 | }
|
---|
| 501 | p++;
|
---|
| 502 | }
|
---|
| 503 | *q = '\0';
|
---|
| 504 | p++;
|
---|
| 505 | /* Now log it */
|
---|
| 506 | logMessage(pri, line);
|
---|
| 507 | }
|
---|
| 508 | return n_read;
|
---|
| 509 | }
|
---|
| 510 |
|
---|
| 511 | static void doSyslogd(void) ATTRIBUTE_NORETURN;
|
---|
| 512 | static void doSyslogd(void)
|
---|
| 513 | {
|
---|
| 514 | struct sockaddr_un sunx;
|
---|
| 515 | socklen_t addrLength;
|
---|
| 516 |
|
---|
| 517 | int sock_fd;
|
---|
| 518 | fd_set fds;
|
---|
| 519 |
|
---|
| 520 | /* Set up signal handlers. */
|
---|
| 521 | signal(SIGINT, quit_signal);
|
---|
| 522 | signal(SIGTERM, quit_signal);
|
---|
| 523 | signal(SIGQUIT, quit_signal);
|
---|
| 524 | signal(SIGHUP, SIG_IGN);
|
---|
| 525 | signal(SIGCHLD, SIG_IGN);
|
---|
| 526 | #ifdef SIGCLD
|
---|
| 527 | signal(SIGCLD, SIG_IGN);
|
---|
| 528 | #endif
|
---|
| 529 | signal(SIGALRM, domark);
|
---|
| 530 | alarm(MarkInterval);
|
---|
| 531 |
|
---|
| 532 | /* Create the syslog file so realpath() can work. */
|
---|
| 533 | if (realpath(_PATH_LOG, lfile) != NULL) {
|
---|
| 534 | unlink(lfile);
|
---|
| 535 | }
|
---|
| 536 |
|
---|
| 537 | memset(&sunx, 0, sizeof(sunx));
|
---|
| 538 | sunx.sun_family = AF_UNIX;
|
---|
| 539 | strncpy(sunx.sun_path, lfile, sizeof(sunx.sun_path));
|
---|
| 540 | sock_fd = bb_xsocket(AF_UNIX, SOCK_DGRAM, 0);
|
---|
| 541 | addrLength = sizeof(sunx.sun_family) + strlen(sunx.sun_path);
|
---|
| 542 | if (bind(sock_fd, (struct sockaddr *) &sunx, addrLength) < 0) {
|
---|
| 543 | bb_perror_msg_and_die("Could not connect to socket " _PATH_LOG);
|
---|
| 544 | }
|
---|
| 545 |
|
---|
| 546 | if (chmod(lfile, 0666) < 0) {
|
---|
| 547 | bb_perror_msg_and_die("Could not set permission on " _PATH_LOG);
|
---|
| 548 | }
|
---|
| 549 | #ifdef CONFIG_FEATURE_IPC_SYSLOG
|
---|
| 550 | if (circular_logging == TRUE) {
|
---|
| 551 | ipcsyslog_init();
|
---|
| 552 | }
|
---|
| 553 | #endif
|
---|
| 554 |
|
---|
| 555 | #ifdef CONFIG_FEATURE_REMOTE_LOG
|
---|
| 556 | if (doRemoteLog == TRUE) {
|
---|
| 557 | init_RemoteLog();
|
---|
| 558 | }
|
---|
| 559 | #endif
|
---|
| 560 |
|
---|
| 561 | logMessage(LOG_SYSLOG | LOG_INFO, "syslogd started: " "BusyBox v" BB_VER );
|
---|
| 562 |
|
---|
| 563 | for (;;) {
|
---|
| 564 |
|
---|
| 565 | FD_ZERO(&fds);
|
---|
| 566 | FD_SET(sock_fd, &fds);
|
---|
| 567 |
|
---|
| 568 | if (select(sock_fd + 1, &fds, NULL, NULL, NULL) < 0) {
|
---|
| 569 | if (errno == EINTR) {
|
---|
| 570 | /* alarm may have happened. */
|
---|
| 571 | continue;
|
---|
| 572 | }
|
---|
| 573 | bb_perror_msg_and_die("select error");
|
---|
| 574 | }
|
---|
| 575 |
|
---|
| 576 | if (FD_ISSET(sock_fd, &fds)) {
|
---|
| 577 | int i;
|
---|
| 578 | #if MAXLINE > BUFSIZ
|
---|
| 579 | # define TMP_BUF_SZ BUFSIZ
|
---|
| 580 | #else
|
---|
| 581 | # define TMP_BUF_SZ MAXLINE
|
---|
| 582 | #endif
|
---|
| 583 | #define tmpbuf bb_common_bufsiz1
|
---|
| 584 |
|
---|
| 585 | if ((i = recv(sock_fd, tmpbuf, TMP_BUF_SZ, 0)) > 0) {
|
---|
| 586 | tmpbuf[i] = '\0';
|
---|
| 587 | serveConnection(tmpbuf, i);
|
---|
| 588 | } else {
|
---|
| 589 | bb_perror_msg_and_die("UNIX socket error");
|
---|
| 590 | }
|
---|
| 591 | } /* FD_ISSET() */
|
---|
| 592 | } /* for main loop */
|
---|
| 593 | }
|
---|
| 594 |
|
---|
| 595 | int syslogd_main(int argc, char **argv)
|
---|
| 596 | {
|
---|
| 597 | int opt;
|
---|
| 598 |
|
---|
| 599 | int doFork = TRUE;
|
---|
| 600 |
|
---|
| 601 | char *p;
|
---|
| 602 |
|
---|
| 603 | /* do normal option parsing */
|
---|
| 604 | while ((opt = getopt(argc, argv, "m:nO:s:Sb:R:LC::")) > 0) {
|
---|
| 605 | switch (opt) {
|
---|
| 606 | case 'm':
|
---|
| 607 | MarkInterval = atoi(optarg) * 60;
|
---|
| 608 | break;
|
---|
| 609 | case 'n':
|
---|
| 610 | doFork = FALSE;
|
---|
| 611 | break;
|
---|
| 612 | case 'O':
|
---|
| 613 | logFilePath = optarg;
|
---|
| 614 | break;
|
---|
| 615 | #ifdef CONFIG_FEATURE_ROTATE_LOGFILE
|
---|
| 616 | case 's':
|
---|
| 617 | logFileSize = atoi(optarg) * 1024;
|
---|
| 618 | break;
|
---|
| 619 | case 'b':
|
---|
| 620 | logFileRotate = atoi(optarg);
|
---|
| 621 | if( logFileRotate > 99 ) logFileRotate = 99;
|
---|
| 622 | break;
|
---|
| 623 | #endif
|
---|
| 624 | #ifdef CONFIG_FEATURE_REMOTE_LOG
|
---|
| 625 | case 'R':
|
---|
| 626 | RemoteHost = bb_xstrdup(optarg);
|
---|
| 627 | if ((p = strchr(RemoteHost, ':'))) {
|
---|
| 628 | RemotePort = atoi(p + 1);
|
---|
| 629 | *p = '\0';
|
---|
| 630 | }
|
---|
| 631 | doRemoteLog = TRUE;
|
---|
| 632 | break;
|
---|
| 633 | case 'L':
|
---|
| 634 | local_logging = TRUE;
|
---|
| 635 | break;
|
---|
| 636 | #endif
|
---|
| 637 | #ifdef CONFIG_FEATURE_IPC_SYSLOG
|
---|
| 638 | case 'C':
|
---|
| 639 | if (optarg) {
|
---|
| 640 | int buf_size = atoi(optarg);
|
---|
| 641 | if (buf_size >= 4) {
|
---|
| 642 | shm_size = buf_size * 1024;
|
---|
| 643 | }
|
---|
| 644 | }
|
---|
| 645 | circular_logging = TRUE;
|
---|
| 646 | break;
|
---|
| 647 | #endif
|
---|
| 648 | case 'S':
|
---|
| 649 | small = true;
|
---|
| 650 | break;
|
---|
| 651 | default:
|
---|
| 652 | bb_show_usage();
|
---|
| 653 | }
|
---|
| 654 | }
|
---|
| 655 |
|
---|
| 656 | #ifdef CONFIG_FEATURE_REMOTE_LOG
|
---|
| 657 | /* If they have not specified remote logging, then log locally */
|
---|
| 658 | if (doRemoteLog == FALSE)
|
---|
| 659 | local_logging = TRUE;
|
---|
| 660 | #endif
|
---|
| 661 |
|
---|
| 662 |
|
---|
| 663 | /* Store away localhost's name before the fork */
|
---|
| 664 | gethostname(LocalHostName, sizeof(LocalHostName));
|
---|
| 665 | if ((p = strchr(LocalHostName, '.'))) {
|
---|
| 666 | *p = '\0';
|
---|
| 667 | }
|
---|
| 668 |
|
---|
| 669 | umask(0);
|
---|
| 670 |
|
---|
| 671 | if (doFork == TRUE) {
|
---|
| 672 | #ifdef BB_NOMMU
|
---|
| 673 | vfork_daemon_rexec(0, 1, argc, argv, "-n");
|
---|
| 674 | #else
|
---|
| 675 | bb_xdaemon(0, 1);
|
---|
| 676 | #endif
|
---|
| 677 | }
|
---|
| 678 | doSyslogd();
|
---|
| 679 |
|
---|
| 680 | return EXIT_SUCCESS;
|
---|
| 681 | }
|
---|