mirror of
https://github.com/sheumann/hush.git
synced 2024-08-20 19:29:02 +00:00
Signed-off-by: Janne Kiviluoto <janne.kiviluoto@bluegiga.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
731 lines
19 KiB
C
731 lines
19 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini syslogd implementation for busybox
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*
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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*
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* Copyright (C) 2000 by Karl M. Hegbloom <karlheg@debian.org>
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*
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* "circular buffer" Copyright (C) 2001 by Gennady Feldman <gfeldman@gena01.com>
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*
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* Maintainer: Gennady Feldman <gfeldman@gena01.com> as of Mar 12, 2001
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*
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* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
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*/
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/*
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* Done in syslogd_and_logger.c:
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#include "libbb.h"
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#define SYSLOG_NAMES
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#define SYSLOG_NAMES_CONST
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#include <syslog.h>
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*/
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#include <sys/un.h>
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#include <sys/uio.h>
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#if ENABLE_FEATURE_REMOTE_LOG
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#include <netinet/in.h>
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#endif
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#if ENABLE_FEATURE_IPC_SYSLOG
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#include <sys/ipc.h>
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#include <sys/sem.h>
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#include <sys/shm.h>
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#endif
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#define DEBUG 0
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/* MARK code is not very useful, is bloat, and broken:
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* can deadlock if alarmed to make MARK while writing to IPC buffer
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* (semaphores are down but do_mark routine tries to down them again) */
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#undef SYSLOGD_MARK
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/* Write locking does not seem to be useful either */
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#undef SYSLOGD_WRLOCK
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enum {
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MAX_READ = CONFIG_FEATURE_SYSLOGD_READ_BUFFER_SIZE,
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DNS_WAIT_SEC = 2 * 60,
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};
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/* Semaphore operation structures */
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struct shbuf_ds {
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int32_t size; /* size of data - 1 */
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int32_t tail; /* end of message list */
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char data[1]; /* data/messages */
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};
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#if ENABLE_FEATURE_REMOTE_LOG
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typedef struct {
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int remoteFD;
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unsigned last_dns_resolve;
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len_and_sockaddr *remoteAddr;
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const char *remoteHostname;
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} remoteHost_t;
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#endif
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/* Allows us to have smaller initializer. Ugly. */
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#define GLOBALS \
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const char *logFilePath; \
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int logFD; \
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/* interval between marks in seconds */ \
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/*int markInterval;*/ \
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/* level of messages to be logged */ \
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int logLevel; \
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IF_FEATURE_ROTATE_LOGFILE( \
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/* max size of file before rotation */ \
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unsigned logFileSize; \
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/* number of rotated message files */ \
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unsigned logFileRotate; \
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unsigned curFileSize; \
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smallint isRegular; \
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) \
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IF_FEATURE_IPC_SYSLOG( \
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int shmid; /* ipc shared memory id */ \
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int s_semid; /* ipc semaphore id */ \
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int shm_size; \
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struct sembuf SMwup[1]; \
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struct sembuf SMwdn[3]; \
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)
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struct init_globals {
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GLOBALS
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};
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struct globals {
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GLOBALS
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#if ENABLE_FEATURE_REMOTE_LOG
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llist_t *remoteHosts;
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#endif
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#if ENABLE_FEATURE_IPC_SYSLOG
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struct shbuf_ds *shbuf;
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#endif
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time_t last_log_time;
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/* localhost's name. We print only first 64 chars */
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char *hostname;
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/* We recv into recvbuf... */
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char recvbuf[MAX_READ * (1 + ENABLE_FEATURE_SYSLOGD_DUP)];
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/* ...then copy to parsebuf, escaping control chars */
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/* (can grow x2 max) */
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char parsebuf[MAX_READ*2];
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/* ...then sprintf into printbuf, adding timestamp (15 chars),
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* host (64), fac.prio (20) to the message */
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/* (growth by: 15 + 64 + 20 + delims = ~110) */
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char printbuf[MAX_READ*2 + 128];
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};
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static const struct init_globals init_data = {
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.logFilePath = "/var/log/messages",
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.logFD = -1,
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#ifdef SYSLOGD_MARK
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.markInterval = 20 * 60,
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#endif
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.logLevel = 8,
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#if ENABLE_FEATURE_ROTATE_LOGFILE
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.logFileSize = 200 * 1024,
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.logFileRotate = 1,
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#endif
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#if ENABLE_FEATURE_IPC_SYSLOG
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.shmid = -1,
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.s_semid = -1,
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.shm_size = ((CONFIG_FEATURE_IPC_SYSLOG_BUFFER_SIZE)*1024), // default shm size
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.SMwup = { {1, -1, IPC_NOWAIT} },
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.SMwdn = { {0, 0}, {1, 0}, {1, +1} },
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#endif
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};
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#define G (*ptr_to_globals)
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#define INIT_G() do { \
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SET_PTR_TO_GLOBALS(memcpy(xzalloc(sizeof(G)), &init_data, sizeof(init_data))); \
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} while (0)
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/* Options */
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enum {
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OPTBIT_mark = 0, // -m
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OPTBIT_nofork, // -n
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OPTBIT_outfile, // -O
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OPTBIT_loglevel, // -l
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OPTBIT_small, // -S
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IF_FEATURE_ROTATE_LOGFILE(OPTBIT_filesize ,) // -s
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IF_FEATURE_ROTATE_LOGFILE(OPTBIT_rotatecnt ,) // -b
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IF_FEATURE_REMOTE_LOG( OPTBIT_remotelog ,) // -R
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IF_FEATURE_REMOTE_LOG( OPTBIT_locallog ,) // -L
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IF_FEATURE_IPC_SYSLOG( OPTBIT_circularlog,) // -C
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IF_FEATURE_SYSLOGD_DUP( OPTBIT_dup ,) // -D
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OPT_mark = 1 << OPTBIT_mark ,
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OPT_nofork = 1 << OPTBIT_nofork ,
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OPT_outfile = 1 << OPTBIT_outfile ,
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OPT_loglevel = 1 << OPTBIT_loglevel,
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OPT_small = 1 << OPTBIT_small ,
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OPT_filesize = IF_FEATURE_ROTATE_LOGFILE((1 << OPTBIT_filesize )) + 0,
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OPT_rotatecnt = IF_FEATURE_ROTATE_LOGFILE((1 << OPTBIT_rotatecnt )) + 0,
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OPT_remotelog = IF_FEATURE_REMOTE_LOG( (1 << OPTBIT_remotelog )) + 0,
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OPT_locallog = IF_FEATURE_REMOTE_LOG( (1 << OPTBIT_locallog )) + 0,
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OPT_circularlog = IF_FEATURE_IPC_SYSLOG( (1 << OPTBIT_circularlog)) + 0,
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OPT_dup = IF_FEATURE_SYSLOGD_DUP( (1 << OPTBIT_dup )) + 0,
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};
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#define OPTION_STR "m:nO:l:S" \
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IF_FEATURE_ROTATE_LOGFILE("s:" ) \
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IF_FEATURE_ROTATE_LOGFILE("b:" ) \
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IF_FEATURE_REMOTE_LOG( "R:" ) \
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IF_FEATURE_REMOTE_LOG( "L" ) \
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IF_FEATURE_IPC_SYSLOG( "C::") \
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IF_FEATURE_SYSLOGD_DUP( "D" )
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#define OPTION_DECL *opt_m, *opt_l \
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IF_FEATURE_ROTATE_LOGFILE(,*opt_s) \
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IF_FEATURE_ROTATE_LOGFILE(,*opt_b) \
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IF_FEATURE_IPC_SYSLOG( ,*opt_C = NULL)
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#define OPTION_PARAM &opt_m, &G.logFilePath, &opt_l \
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IF_FEATURE_ROTATE_LOGFILE(,&opt_s) \
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IF_FEATURE_ROTATE_LOGFILE(,&opt_b) \
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IF_FEATURE_REMOTE_LOG( ,&remoteAddrList) \
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IF_FEATURE_IPC_SYSLOG( ,&opt_C)
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/* circular buffer variables/structures */
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#if ENABLE_FEATURE_IPC_SYSLOG
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#if CONFIG_FEATURE_IPC_SYSLOG_BUFFER_SIZE < 4
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#error Sorry, you must set the syslogd buffer size to at least 4KB.
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#error Please check CONFIG_FEATURE_IPC_SYSLOG_BUFFER_SIZE
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#endif
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/* our shared key (syslogd.c and logread.c must be in sync) */
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enum { KEY_ID = 0x414e4547 }; /* "GENA" */
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static void ipcsyslog_cleanup(void)
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{
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if (G.shmid != -1) {
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shmdt(G.shbuf);
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}
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if (G.shmid != -1) {
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shmctl(G.shmid, IPC_RMID, NULL);
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}
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if (G.s_semid != -1) {
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semctl(G.s_semid, 0, IPC_RMID, 0);
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}
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}
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static void ipcsyslog_init(void)
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{
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if (DEBUG)
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printf("shmget(%x, %d,...)\n", (int)KEY_ID, G.shm_size);
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G.shmid = shmget(KEY_ID, G.shm_size, IPC_CREAT | 0644);
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if (G.shmid == -1) {
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bb_perror_msg_and_die("shmget");
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}
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G.shbuf = shmat(G.shmid, NULL, 0);
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if (G.shbuf == (void*) -1L) { /* shmat has bizarre error return */
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bb_perror_msg_and_die("shmat");
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}
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memset(G.shbuf, 0, G.shm_size);
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G.shbuf->size = G.shm_size - offsetof(struct shbuf_ds, data) - 1;
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/*G.shbuf->tail = 0;*/
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// we'll trust the OS to set initial semval to 0 (let's hope)
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G.s_semid = semget(KEY_ID, 2, IPC_CREAT | IPC_EXCL | 1023);
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if (G.s_semid == -1) {
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if (errno == EEXIST) {
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G.s_semid = semget(KEY_ID, 2, 0);
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if (G.s_semid != -1)
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return;
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}
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bb_perror_msg_and_die("semget");
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}
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}
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/* Write message to shared mem buffer */
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static void log_to_shmem(const char *msg, int len)
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{
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int old_tail, new_tail;
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if (semop(G.s_semid, G.SMwdn, 3) == -1) {
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bb_perror_msg_and_die("SMwdn");
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}
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/* Circular Buffer Algorithm:
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* --------------------------
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* tail == position where to store next syslog message.
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* tail's max value is (shbuf->size - 1)
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* Last byte of buffer is never used and remains NUL.
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*/
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len++; /* length with NUL included */
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again:
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old_tail = G.shbuf->tail;
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new_tail = old_tail + len;
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if (new_tail < G.shbuf->size) {
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/* store message, set new tail */
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memcpy(G.shbuf->data + old_tail, msg, len);
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G.shbuf->tail = new_tail;
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} else {
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/* k == available buffer space ahead of old tail */
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int k = G.shbuf->size - old_tail;
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/* copy what fits to the end of buffer, and repeat */
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memcpy(G.shbuf->data + old_tail, msg, k);
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msg += k;
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len -= k;
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G.shbuf->tail = 0;
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goto again;
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}
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if (semop(G.s_semid, G.SMwup, 1) == -1) {
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bb_perror_msg_and_die("SMwup");
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}
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if (DEBUG)
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printf("tail:%d\n", G.shbuf->tail);
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}
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#else
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void ipcsyslog_cleanup(void);
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void ipcsyslog_init(void);
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void log_to_shmem(const char *msg);
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#endif /* FEATURE_IPC_SYSLOG */
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/* Print a message to the log file. */
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static void log_locally(time_t now, char *msg)
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{
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#ifdef SYSLOGD_WRLOCK
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struct flock fl;
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#endif
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int len = strlen(msg);
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#if ENABLE_FEATURE_IPC_SYSLOG
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if ((option_mask32 & OPT_circularlog) && G.shbuf) {
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log_to_shmem(msg, len);
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return;
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}
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#endif
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if (G.logFD >= 0) {
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/* Reopen log file every second. This allows admin
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* to delete the file and not worry about restarting us.
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* This costs almost nothing since it happens
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* _at most_ once a second.
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*/
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if (!now)
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now = time(NULL);
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if (G.last_log_time != now) {
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G.last_log_time = now;
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close(G.logFD);
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goto reopen;
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}
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} else {
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reopen:
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G.logFD = open(G.logFilePath, O_WRONLY | O_CREAT
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| O_NOCTTY | O_APPEND | O_NONBLOCK,
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0666);
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if (G.logFD < 0) {
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/* cannot open logfile? - print to /dev/console then */
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int fd = device_open(DEV_CONSOLE, O_WRONLY | O_NOCTTY | O_NONBLOCK);
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if (fd < 0)
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fd = 2; /* then stderr, dammit */
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full_write(fd, msg, len);
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if (fd != 2)
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close(fd);
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return;
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}
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#if ENABLE_FEATURE_ROTATE_LOGFILE
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{
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struct stat statf;
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G.isRegular = (fstat(G.logFD, &statf) == 0 && S_ISREG(statf.st_mode));
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/* bug (mostly harmless): can wrap around if file > 4gb */
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G.curFileSize = statf.st_size;
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}
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#endif
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}
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#ifdef SYSLOGD_WRLOCK
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fl.l_whence = SEEK_SET;
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fl.l_start = 0;
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fl.l_len = 1;
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fl.l_type = F_WRLCK;
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fcntl(G.logFD, F_SETLKW, &fl);
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#endif
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#if ENABLE_FEATURE_ROTATE_LOGFILE
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if (G.logFileSize && G.isRegular && G.curFileSize > G.logFileSize) {
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if (G.logFileRotate) { /* always 0..99 */
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int i = strlen(G.logFilePath) + 3 + 1;
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char oldFile[i];
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char newFile[i];
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i = G.logFileRotate - 1;
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/* rename: f.8 -> f.9; f.7 -> f.8; ... */
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while (1) {
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sprintf(newFile, "%s.%d", G.logFilePath, i);
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if (i == 0) break;
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sprintf(oldFile, "%s.%d", G.logFilePath, --i);
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/* ignore errors - file might be missing */
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rename(oldFile, newFile);
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}
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/* newFile == "f.0" now */
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rename(G.logFilePath, newFile);
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#ifdef SYSLOGD_WRLOCK
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fl.l_type = F_UNLCK;
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fcntl(G.logFD, F_SETLKW, &fl);
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#endif
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close(G.logFD);
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goto reopen;
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}
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ftruncate(G.logFD, 0);
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}
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G.curFileSize +=
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#endif
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full_write(G.logFD, msg, len);
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#ifdef SYSLOGD_WRLOCK
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fl.l_type = F_UNLCK;
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fcntl(G.logFD, F_SETLKW, &fl);
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#endif
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}
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static void parse_fac_prio_20(int pri, char *res20)
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{
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const CODE *c_pri, *c_fac;
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if (pri != 0) {
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c_fac = facilitynames;
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while (c_fac->c_name) {
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if (c_fac->c_val != (LOG_FAC(pri) << 3)) {
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c_fac++;
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continue;
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}
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/* facility is found, look for prio */
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c_pri = prioritynames;
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while (c_pri->c_name) {
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if (c_pri->c_val != LOG_PRI(pri)) {
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c_pri++;
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continue;
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}
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snprintf(res20, 20, "%s.%s",
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c_fac->c_name, c_pri->c_name);
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return;
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}
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/* prio not found, bail out */
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break;
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}
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snprintf(res20, 20, "<%d>", pri);
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}
|
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}
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|
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/* len parameter is used only for "is there a timestamp?" check.
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* NB: some callers cheat and supply len==0 when they know
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* that there is no timestamp, short-circuiting the test. */
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static void timestamp_and_log(int pri, char *msg, int len)
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{
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char *timestamp;
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time_t now;
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|
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/* Jan 18 00:11:22 msg... */
|
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/* 01234567890123456 */
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if (len < 16 || msg[3] != ' ' || msg[6] != ' '
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|| msg[9] != ':' || msg[12] != ':' || msg[15] != ' '
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) {
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time(&now);
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timestamp = ctime(&now) + 4; /* skip day of week */
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} else {
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now = 0;
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timestamp = msg;
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msg += 16;
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}
|
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timestamp[15] = '\0';
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|
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if (option_mask32 & OPT_small)
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sprintf(G.printbuf, "%s %s\n", timestamp, msg);
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else {
|
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char res[20];
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parse_fac_prio_20(pri, res);
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sprintf(G.printbuf, "%s %.64s %s %s\n", timestamp, G.hostname, res, msg);
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}
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|
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/* Log message locally (to file or shared mem) */
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log_locally(now, G.printbuf);
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}
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|
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static void timestamp_and_log_internal(const char *msg)
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{
|
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/* -L, or no -R */
|
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if (ENABLE_FEATURE_REMOTE_LOG && !(option_mask32 & OPT_locallog))
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return;
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timestamp_and_log(LOG_SYSLOG | LOG_INFO, (char*)msg, 0);
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}
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|
|
/* tmpbuf[len] is a NUL byte (set by caller), but there can be other,
|
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* embedded NULs. Split messages on each of these NULs, parse prio,
|
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* escape control chars and log each locally. */
|
|
static void split_escape_and_log(char *tmpbuf, int len)
|
|
{
|
|
char *p = tmpbuf;
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|
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tmpbuf += len;
|
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while (p < tmpbuf) {
|
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char c;
|
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char *q = G.parsebuf;
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int pri = (LOG_USER | LOG_NOTICE);
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|
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if (*p == '<') {
|
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/* Parse the magic priority number */
|
|
pri = bb_strtou(p + 1, &p, 10);
|
|
if (*p == '>')
|
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p++;
|
|
if (pri & ~(LOG_FACMASK | LOG_PRIMASK))
|
|
pri = (LOG_USER | LOG_NOTICE);
|
|
}
|
|
|
|
while ((c = *p++)) {
|
|
if (c == '\n')
|
|
c = ' ';
|
|
if (!(c & ~0x1f) && c != '\t') {
|
|
*q++ = '^';
|
|
c += '@'; /* ^@, ^A, ^B... */
|
|
}
|
|
*q++ = c;
|
|
}
|
|
*q = '\0';
|
|
|
|
/* Now log it */
|
|
if (LOG_PRI(pri) < G.logLevel)
|
|
timestamp_and_log(pri, G.parsebuf, q - G.parsebuf);
|
|
}
|
|
}
|
|
|
|
#ifdef SYSLOGD_MARK
|
|
static void do_mark(int sig)
|
|
{
|
|
if (G.markInterval) {
|
|
timestamp_and_log_internal("-- MARK --");
|
|
alarm(G.markInterval);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* Don't inline: prevent struct sockaddr_un to take up space on stack
|
|
* permanently */
|
|
static NOINLINE int create_socket(void)
|
|
{
|
|
struct sockaddr_un sunx;
|
|
int sock_fd;
|
|
char *dev_log_name;
|
|
|
|
memset(&sunx, 0, sizeof(sunx));
|
|
sunx.sun_family = AF_UNIX;
|
|
|
|
/* Unlink old /dev/log or object it points to. */
|
|
/* (if it exists, bind will fail) */
|
|
strcpy(sunx.sun_path, "/dev/log");
|
|
dev_log_name = xmalloc_follow_symlinks("/dev/log");
|
|
if (dev_log_name) {
|
|
safe_strncpy(sunx.sun_path, dev_log_name, sizeof(sunx.sun_path));
|
|
free(dev_log_name);
|
|
}
|
|
unlink(sunx.sun_path);
|
|
|
|
sock_fd = xsocket(AF_UNIX, SOCK_DGRAM, 0);
|
|
xbind(sock_fd, (struct sockaddr *) &sunx, sizeof(sunx));
|
|
chmod("/dev/log", 0666);
|
|
|
|
return sock_fd;
|
|
}
|
|
|
|
#if ENABLE_FEATURE_REMOTE_LOG
|
|
static int try_to_resolve_remote(remoteHost_t *rh)
|
|
{
|
|
if (!rh->remoteAddr) {
|
|
unsigned now = monotonic_sec();
|
|
|
|
/* Don't resolve name too often - DNS timeouts can be big */
|
|
if ((now - rh->last_dns_resolve) < DNS_WAIT_SEC)
|
|
return -1;
|
|
rh->last_dns_resolve = now;
|
|
rh->remoteAddr = host2sockaddr(rh->remoteHostname, 514);
|
|
if (!rh->remoteAddr)
|
|
return -1;
|
|
}
|
|
return socket(rh->remoteAddr->u.sa.sa_family, SOCK_DGRAM, 0);
|
|
}
|
|
#endif
|
|
|
|
static void do_syslogd(void) NORETURN;
|
|
static void do_syslogd(void)
|
|
{
|
|
int sock_fd;
|
|
#if ENABLE_FEATURE_REMOTE_LOG
|
|
llist_t *item;
|
|
#endif
|
|
#if ENABLE_FEATURE_SYSLOGD_DUP
|
|
int last_sz = -1;
|
|
char *last_buf;
|
|
char *recvbuf = G.recvbuf;
|
|
#else
|
|
#define recvbuf (G.recvbuf)
|
|
#endif
|
|
|
|
/* Set up signal handlers (so that they interrupt read()) */
|
|
signal_no_SA_RESTART_empty_mask(SIGTERM, record_signo);
|
|
signal_no_SA_RESTART_empty_mask(SIGINT, record_signo);
|
|
//signal_no_SA_RESTART_empty_mask(SIGQUIT, record_signo);
|
|
signal(SIGHUP, SIG_IGN);
|
|
#ifdef SYSLOGD_MARK
|
|
signal(SIGALRM, do_mark);
|
|
alarm(G.markInterval);
|
|
#endif
|
|
sock_fd = create_socket();
|
|
|
|
if (ENABLE_FEATURE_IPC_SYSLOG && (option_mask32 & OPT_circularlog)) {
|
|
ipcsyslog_init();
|
|
}
|
|
|
|
timestamp_and_log_internal("syslogd started: BusyBox v" BB_VER);
|
|
|
|
while (!bb_got_signal) {
|
|
ssize_t sz;
|
|
|
|
#if ENABLE_FEATURE_SYSLOGD_DUP
|
|
last_buf = recvbuf;
|
|
if (recvbuf == G.recvbuf)
|
|
recvbuf = G.recvbuf + MAX_READ;
|
|
else
|
|
recvbuf = G.recvbuf;
|
|
#endif
|
|
read_again:
|
|
sz = read(sock_fd, recvbuf, MAX_READ - 1);
|
|
if (sz < 0) {
|
|
if (!bb_got_signal)
|
|
bb_perror_msg("read from /dev/log");
|
|
break;
|
|
}
|
|
|
|
/* Drop trailing '\n' and NULs (typically there is one NUL) */
|
|
while (1) {
|
|
if (sz == 0)
|
|
goto read_again;
|
|
/* man 3 syslog says: "A trailing newline is added when needed".
|
|
* However, neither glibc nor uclibc do this:
|
|
* syslog(prio, "test") sends "test\0" to /dev/log,
|
|
* syslog(prio, "test\n") sends "test\n\0".
|
|
* IOW: newline is passed verbatim!
|
|
* I take it to mean that it's syslogd's job
|
|
* to make those look identical in the log files. */
|
|
if (recvbuf[sz-1] != '\0' && recvbuf[sz-1] != '\n')
|
|
break;
|
|
sz--;
|
|
}
|
|
#if ENABLE_FEATURE_SYSLOGD_DUP
|
|
if ((option_mask32 & OPT_dup) && (sz == last_sz))
|
|
if (memcmp(last_buf, recvbuf, sz) == 0)
|
|
continue;
|
|
last_sz = sz;
|
|
#endif
|
|
#if ENABLE_FEATURE_REMOTE_LOG
|
|
/* Stock syslogd sends it '\n'-terminated
|
|
* over network, mimic that */
|
|
recvbuf[sz] = '\n';
|
|
|
|
/* We are not modifying log messages in any way before send */
|
|
/* Remote site cannot trust _us_ anyway and need to do validation again */
|
|
for (item = G.remoteHosts; item != NULL; item = item->link) {
|
|
remoteHost_t *rh = (remoteHost_t *)item->data;
|
|
|
|
if (rh->remoteFD == -1) {
|
|
rh->remoteFD = try_to_resolve_remote(rh);
|
|
if (rh->remoteFD == -1)
|
|
continue;
|
|
}
|
|
/* Send message to remote logger, ignore possible error */
|
|
/* TODO: on some errors, close and set G.remoteFD to -1
|
|
* so that DNS resolution and connect is retried? */
|
|
sendto(rh->remoteFD, recvbuf, sz+1, MSG_DONTWAIT,
|
|
&(rh->remoteAddr->u.sa), rh->remoteAddr->len);
|
|
}
|
|
#endif
|
|
if (!ENABLE_FEATURE_REMOTE_LOG || (option_mask32 & OPT_locallog)) {
|
|
recvbuf[sz] = '\0'; /* ensure it *is* NUL terminated */
|
|
split_escape_and_log(recvbuf, sz);
|
|
}
|
|
} /* while (!bb_got_signal) */
|
|
|
|
timestamp_and_log_internal("syslogd exiting");
|
|
puts("syslogd exiting");
|
|
if (ENABLE_FEATURE_IPC_SYSLOG)
|
|
ipcsyslog_cleanup();
|
|
kill_myself_with_sig(bb_got_signal);
|
|
#undef recvbuf
|
|
}
|
|
|
|
int syslogd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int syslogd_main(int argc UNUSED_PARAM, char **argv)
|
|
{
|
|
int opts;
|
|
char OPTION_DECL;
|
|
#if ENABLE_FEATURE_REMOTE_LOG
|
|
llist_t *remoteAddrList = NULL;
|
|
#endif
|
|
|
|
INIT_G();
|
|
|
|
/* No non-option params, -R can occur multiple times */
|
|
opt_complementary = "=0" IF_FEATURE_REMOTE_LOG(":R::");
|
|
opts = getopt32(argv, OPTION_STR, OPTION_PARAM);
|
|
#if ENABLE_FEATURE_REMOTE_LOG
|
|
while (remoteAddrList) {
|
|
remoteHost_t *rh = xzalloc(sizeof(*rh));
|
|
rh->remoteHostname = llist_pop(&remoteAddrList);
|
|
rh->remoteFD = -1;
|
|
rh->last_dns_resolve = monotonic_sec() - DNS_WAIT_SEC - 1;
|
|
llist_add_to(&G.remoteHosts, rh);
|
|
}
|
|
#endif
|
|
|
|
#ifdef SYSLOGD_MARK
|
|
if (opts & OPT_mark) // -m
|
|
G.markInterval = xatou_range(opt_m, 0, INT_MAX/60) * 60;
|
|
#endif
|
|
//if (opts & OPT_nofork) // -n
|
|
//if (opts & OPT_outfile) // -O
|
|
if (opts & OPT_loglevel) // -l
|
|
G.logLevel = xatou_range(opt_l, 1, 8);
|
|
//if (opts & OPT_small) // -S
|
|
#if ENABLE_FEATURE_ROTATE_LOGFILE
|
|
if (opts & OPT_filesize) // -s
|
|
G.logFileSize = xatou_range(opt_s, 0, INT_MAX/1024) * 1024;
|
|
if (opts & OPT_rotatecnt) // -b
|
|
G.logFileRotate = xatou_range(opt_b, 0, 99);
|
|
#endif
|
|
#if ENABLE_FEATURE_IPC_SYSLOG
|
|
if (opt_C) // -Cn
|
|
G.shm_size = xatoul_range(opt_C, 4, INT_MAX/1024) * 1024;
|
|
#endif
|
|
|
|
/* If they have not specified remote logging, then log locally */
|
|
if (ENABLE_FEATURE_REMOTE_LOG && !(opts & OPT_remotelog)) // -R
|
|
option_mask32 |= OPT_locallog;
|
|
|
|
/* Store away localhost's name before the fork */
|
|
G.hostname = safe_gethostname();
|
|
*strchrnul(G.hostname, '.') = '\0';
|
|
|
|
if (!(opts & OPT_nofork)) {
|
|
bb_daemonize_or_rexec(DAEMON_CHDIR_ROOT, argv);
|
|
}
|
|
//umask(0); - why??
|
|
write_pidfile("/var/run/syslogd.pid");
|
|
do_syslogd();
|
|
/* return EXIT_SUCCESS; */
|
|
}
|
|
|
|
/* Clean up. Needed because we are included from syslogd_and_logger.c */
|
|
#undef DEBUG
|
|
#undef SYSLOGD_MARK
|
|
#undef SYSLOGD_WRLOCK
|
|
#undef G
|
|
#undef GLOBALS
|
|
#undef INIT_G
|
|
#undef OPTION_STR
|
|
#undef OPTION_DECL
|
|
#undef OPTION_PARAM
|