1175 lines
32 KiB
C
1175 lines
32 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* Mini syslogd implementation for busybox
|
|
*
|
|
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
|
|
*
|
|
* Copyright (C) 2000 by Karl M. Hegbloom <karlheg@debian.org>
|
|
*
|
|
* "circular buffer" Copyright (C) 2001 by Gennady Feldman <gfeldman@gena01.com>
|
|
*
|
|
* Maintainer: Gennady Feldman <gfeldman@gena01.com> as of Mar 12, 2001
|
|
*
|
|
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
|
|
*/
|
|
//config:config SYSLOGD
|
|
//config: bool "syslogd"
|
|
//config: default y
|
|
//config: help
|
|
//config: The syslogd utility is used to record logs of all the
|
|
//config: significant events that occur on a system. Every
|
|
//config: message that is logged records the date and time of the
|
|
//config: event, and will generally also record the name of the
|
|
//config: application that generated the message. When used in
|
|
//config: conjunction with klogd, messages from the Linux kernel
|
|
//config: can also be recorded. This is terribly useful,
|
|
//config: especially for finding what happened when something goes
|
|
//config: wrong. And something almost always will go wrong if
|
|
//config: you wait long enough....
|
|
//config:
|
|
//config:config FEATURE_ROTATE_LOGFILE
|
|
//config: bool "Rotate message files"
|
|
//config: default y
|
|
//config: depends on SYSLOGD
|
|
//config: help
|
|
//config: This enables syslogd to rotate the message files
|
|
//config: on his own. No need to use an external rotate script.
|
|
//config:
|
|
//config:config FEATURE_REMOTE_LOG
|
|
//config: bool "Remote Log support"
|
|
//config: default y
|
|
//config: depends on SYSLOGD
|
|
//config: help
|
|
//config: When you enable this feature, the syslogd utility can
|
|
//config: be used to send system log messages to another system
|
|
//config: connected via a network. This allows the remote
|
|
//config: machine to log all the system messages, which can be
|
|
//config: terribly useful for reducing the number of serial
|
|
//config: cables you use. It can also be a very good security
|
|
//config: measure to prevent system logs from being tampered with
|
|
//config: by an intruder.
|
|
//config:
|
|
//config:config FEATURE_SYSLOGD_DUP
|
|
//config: bool "Support -D (drop dups) option"
|
|
//config: default y
|
|
//config: depends on SYSLOGD
|
|
//config: help
|
|
//config: Option -D instructs syslogd to drop consecutive messages
|
|
//config: which are totally the same.
|
|
//config:
|
|
//config:config FEATURE_SYSLOGD_CFG
|
|
//config: bool "Support syslog.conf"
|
|
//config: default y
|
|
//config: depends on SYSLOGD
|
|
//config: help
|
|
//config: Supports restricted syslogd config. See docs/syslog.conf.txt
|
|
//config:
|
|
//config:config FEATURE_SYSLOGD_READ_BUFFER_SIZE
|
|
//config: int "Read buffer size in bytes"
|
|
//config: default 256
|
|
//config: range 256 20000
|
|
//config: depends on SYSLOGD
|
|
//config: help
|
|
//config: This option sets the size of the syslog read buffer.
|
|
//config: Actual memory usage increases around five times the
|
|
//config: change done here.
|
|
//config:
|
|
//config:config FEATURE_IPC_SYSLOG
|
|
//config: bool "Circular Buffer support"
|
|
//config: default y
|
|
//config: depends on SYSLOGD
|
|
//config: help
|
|
//config: When you enable this feature, the syslogd utility will
|
|
//config: use a circular buffer to record system log messages.
|
|
//config: When the buffer is filled it will continue to overwrite
|
|
//config: the oldest messages. This can be very useful for
|
|
//config: systems with little or no permanent storage, since
|
|
//config: otherwise system logs can eventually fill up your
|
|
//config: entire filesystem, which may cause your system to
|
|
//config: break badly.
|
|
//config:
|
|
//config:config FEATURE_IPC_SYSLOG_BUFFER_SIZE
|
|
//config: int "Circular buffer size in Kbytes (minimum 4KB)"
|
|
//config: default 16
|
|
//config: range 4 2147483647
|
|
//config: depends on FEATURE_IPC_SYSLOG
|
|
//config: help
|
|
//config: This option sets the size of the circular buffer
|
|
//config: used to record system log messages.
|
|
//config:
|
|
//config:config FEATURE_KMSG_SYSLOG
|
|
//config: bool "Linux kernel printk buffer support"
|
|
//config: default y
|
|
//config: depends on SYSLOGD
|
|
//config: select PLATFORM_LINUX
|
|
//config: help
|
|
//config: When you enable this feature, the syslogd utility will
|
|
//config: write system log message to the Linux kernel's printk buffer.
|
|
//config: This can be used as a smaller alternative to the syslogd IPC
|
|
//config: support, as klogd and logread aren't needed.
|
|
//config:
|
|
//config: NOTICE: Syslog facilities in log entries needs kernel 3.5+.
|
|
|
|
//applet:IF_SYSLOGD(APPLET(syslogd, BB_DIR_SBIN, BB_SUID_DROP))
|
|
|
|
//kbuild:lib-$(CONFIG_SYSLOGD) += syslogd_and_logger.o
|
|
|
|
//usage:#define syslogd_trivial_usage
|
|
//usage: "[OPTIONS]"
|
|
//usage:#define syslogd_full_usage "\n\n"
|
|
//usage: "System logging utility\n"
|
|
//usage: IF_NOT_FEATURE_SYSLOGD_CFG(
|
|
//usage: "(this version of syslogd ignores /etc/syslog.conf)\n"
|
|
//usage: )
|
|
//usage: "\n -n Run in foreground"
|
|
//usage: IF_FEATURE_REMOTE_LOG(
|
|
//usage: "\n -R HOST[:PORT] Log to HOST:PORT (default PORT:514)"
|
|
//usage: "\n -L Log locally and via network (default is network only if -R)"
|
|
//usage: )
|
|
//usage: IF_FEATURE_IPC_SYSLOG(
|
|
/* NB: -Csize shouldn't have space (because size is optional) */
|
|
//usage: "\n -C[size_kb] Log to shared mem buffer (use logread to read it)"
|
|
//usage: )
|
|
//usage: IF_FEATURE_KMSG_SYSLOG(
|
|
//usage: "\n -K Log to kernel printk buffer (use dmesg to read it)"
|
|
//usage: )
|
|
//usage: "\n -O FILE Log to FILE (default: /var/log/messages, stdout if -)"
|
|
//usage: IF_FEATURE_ROTATE_LOGFILE(
|
|
//usage: "\n -s SIZE Max size (KB) before rotation (default:200KB, 0=off)"
|
|
//usage: "\n -b N N rotated logs to keep (default:1, max=99, 0=purge)"
|
|
//usage: )
|
|
//usage: "\n -l N Log only messages more urgent than prio N (1-8)"
|
|
//usage: "\n -S Smaller output"
|
|
//usage: IF_FEATURE_SYSLOGD_DUP(
|
|
//usage: "\n -D Drop duplicates"
|
|
//usage: )
|
|
//usage: IF_FEATURE_SYSLOGD_CFG(
|
|
//usage: "\n -f FILE Use FILE as config (default:/etc/syslog.conf)"
|
|
//usage: )
|
|
/* //usage: "\n -m MIN Minutes between MARK lines (default:20, 0=off)" */
|
|
//usage:
|
|
//usage:#define syslogd_example_usage
|
|
//usage: "$ syslogd -R masterlog:514\n"
|
|
//usage: "$ syslogd -R 192.168.1.1:601\n"
|
|
|
|
/*
|
|
* Done in syslogd_and_logger.c:
|
|
#include "libbb.h"
|
|
#define SYSLOG_NAMES
|
|
#define SYSLOG_NAMES_CONST
|
|
#include <syslog.h>
|
|
*/
|
|
#ifndef _PATH_LOG
|
|
#define _PATH_LOG "/dev/log"
|
|
#endif
|
|
|
|
#include <sys/un.h>
|
|
#include <sys/uio.h>
|
|
|
|
#if ENABLE_FEATURE_REMOTE_LOG
|
|
#include <netinet/in.h>
|
|
#endif
|
|
|
|
#if ENABLE_FEATURE_IPC_SYSLOG
|
|
#include <sys/ipc.h>
|
|
#include <sys/sem.h>
|
|
#include <sys/shm.h>
|
|
#endif
|
|
|
|
|
|
#define DEBUG 0
|
|
|
|
/* MARK code is not very useful, is bloat, and broken:
|
|
* can deadlock if alarmed to make MARK while writing to IPC buffer
|
|
* (semaphores are down but do_mark routine tries to down them again) */
|
|
#undef SYSLOGD_MARK
|
|
|
|
/* Write locking does not seem to be useful either */
|
|
#undef SYSLOGD_WRLOCK
|
|
|
|
enum {
|
|
MAX_READ = CONFIG_FEATURE_SYSLOGD_READ_BUFFER_SIZE,
|
|
DNS_WAIT_SEC = 2 * 60,
|
|
};
|
|
|
|
/* Semaphore operation structures */
|
|
struct shbuf_ds {
|
|
int32_t size; /* size of data - 1 */
|
|
int32_t tail; /* end of message list */
|
|
char data[1]; /* data/messages */
|
|
};
|
|
|
|
#if ENABLE_FEATURE_REMOTE_LOG
|
|
typedef struct {
|
|
int remoteFD;
|
|
unsigned last_dns_resolve;
|
|
len_and_sockaddr *remoteAddr;
|
|
const char *remoteHostname;
|
|
} remoteHost_t;
|
|
#endif
|
|
|
|
typedef struct logFile_t {
|
|
const char *path;
|
|
int fd;
|
|
time_t last_log_time;
|
|
#if ENABLE_FEATURE_ROTATE_LOGFILE
|
|
unsigned size;
|
|
uint8_t isRegular;
|
|
#endif
|
|
} logFile_t;
|
|
|
|
#if ENABLE_FEATURE_SYSLOGD_CFG
|
|
typedef struct logRule_t {
|
|
uint8_t enabled_facility_priomap[LOG_NFACILITIES];
|
|
struct logFile_t *file;
|
|
struct logRule_t *next;
|
|
} logRule_t;
|
|
#endif
|
|
|
|
/* Allows us to have smaller initializer. Ugly. */
|
|
#define GLOBALS \
|
|
logFile_t logFile; \
|
|
/* interval between marks in seconds */ \
|
|
/*int markInterval;*/ \
|
|
/* level of messages to be logged */ \
|
|
int logLevel; \
|
|
IF_FEATURE_ROTATE_LOGFILE( \
|
|
/* max size of file before rotation */ \
|
|
unsigned logFileSize; \
|
|
/* number of rotated message files */ \
|
|
unsigned logFileRotate; \
|
|
) \
|
|
IF_FEATURE_IPC_SYSLOG( \
|
|
int shmid; /* ipc shared memory id */ \
|
|
int s_semid; /* ipc semaphore id */ \
|
|
int shm_size; \
|
|
struct sembuf SMwup[1]; \
|
|
struct sembuf SMwdn[3]; \
|
|
) \
|
|
IF_FEATURE_SYSLOGD_CFG( \
|
|
logRule_t *log_rules; \
|
|
) \
|
|
IF_FEATURE_KMSG_SYSLOG( \
|
|
int kmsgfd; \
|
|
int primask; \
|
|
)
|
|
|
|
struct init_globals {
|
|
GLOBALS
|
|
};
|
|
|
|
struct globals {
|
|
GLOBALS
|
|
|
|
#if ENABLE_FEATURE_REMOTE_LOG
|
|
llist_t *remoteHosts;
|
|
#endif
|
|
#if ENABLE_FEATURE_IPC_SYSLOG
|
|
struct shbuf_ds *shbuf;
|
|
#endif
|
|
/* localhost's name. We print only first 64 chars */
|
|
char *hostname;
|
|
|
|
/* We recv into recvbuf... */
|
|
char recvbuf[MAX_READ * (1 + ENABLE_FEATURE_SYSLOGD_DUP)];
|
|
/* ...then copy to parsebuf, escaping control chars */
|
|
/* (can grow x2 max) */
|
|
char parsebuf[MAX_READ*2];
|
|
/* ...then sprintf into printbuf, adding timestamp (15 chars),
|
|
* host (64), fac.prio (20) to the message */
|
|
/* (growth by: 15 + 64 + 20 + delims = ~110) */
|
|
char printbuf[MAX_READ*2 + 128];
|
|
};
|
|
|
|
static const struct init_globals init_data = {
|
|
.logFile = {
|
|
.path = "/var/log/messages",
|
|
.fd = -1,
|
|
},
|
|
#ifdef SYSLOGD_MARK
|
|
.markInterval = 20 * 60,
|
|
#endif
|
|
.logLevel = 8,
|
|
#if ENABLE_FEATURE_ROTATE_LOGFILE
|
|
.logFileSize = 200 * 1024,
|
|
.logFileRotate = 1,
|
|
#endif
|
|
#if ENABLE_FEATURE_IPC_SYSLOG
|
|
.shmid = -1,
|
|
.s_semid = -1,
|
|
.shm_size = ((CONFIG_FEATURE_IPC_SYSLOG_BUFFER_SIZE)*1024), /* default shm size */
|
|
.SMwup = { {1, -1, IPC_NOWAIT} },
|
|
.SMwdn = { {0, 0}, {1, 0}, {1, +1} },
|
|
#endif
|
|
};
|
|
|
|
#define G (*ptr_to_globals)
|
|
#define INIT_G() do { \
|
|
SET_PTR_TO_GLOBALS(memcpy(xzalloc(sizeof(G)), &init_data, sizeof(init_data))); \
|
|
} while (0)
|
|
|
|
|
|
/* Options */
|
|
enum {
|
|
OPTBIT_mark = 0, // -m
|
|
OPTBIT_nofork, // -n
|
|
OPTBIT_outfile, // -O
|
|
OPTBIT_loglevel, // -l
|
|
OPTBIT_small, // -S
|
|
IF_FEATURE_ROTATE_LOGFILE(OPTBIT_filesize ,) // -s
|
|
IF_FEATURE_ROTATE_LOGFILE(OPTBIT_rotatecnt ,) // -b
|
|
IF_FEATURE_REMOTE_LOG( OPTBIT_remotelog ,) // -R
|
|
IF_FEATURE_REMOTE_LOG( OPTBIT_locallog ,) // -L
|
|
IF_FEATURE_IPC_SYSLOG( OPTBIT_circularlog,) // -C
|
|
IF_FEATURE_SYSLOGD_DUP( OPTBIT_dup ,) // -D
|
|
IF_FEATURE_SYSLOGD_CFG( OPTBIT_cfg ,) // -f
|
|
IF_FEATURE_KMSG_SYSLOG( OPTBIT_kmsg ,) // -K
|
|
|
|
OPT_mark = 1 << OPTBIT_mark ,
|
|
OPT_nofork = 1 << OPTBIT_nofork ,
|
|
OPT_outfile = 1 << OPTBIT_outfile ,
|
|
OPT_loglevel = 1 << OPTBIT_loglevel,
|
|
OPT_small = 1 << OPTBIT_small ,
|
|
OPT_filesize = IF_FEATURE_ROTATE_LOGFILE((1 << OPTBIT_filesize )) + 0,
|
|
OPT_rotatecnt = IF_FEATURE_ROTATE_LOGFILE((1 << OPTBIT_rotatecnt )) + 0,
|
|
OPT_remotelog = IF_FEATURE_REMOTE_LOG( (1 << OPTBIT_remotelog )) + 0,
|
|
OPT_locallog = IF_FEATURE_REMOTE_LOG( (1 << OPTBIT_locallog )) + 0,
|
|
OPT_circularlog = IF_FEATURE_IPC_SYSLOG( (1 << OPTBIT_circularlog)) + 0,
|
|
OPT_dup = IF_FEATURE_SYSLOGD_DUP( (1 << OPTBIT_dup )) + 0,
|
|
OPT_cfg = IF_FEATURE_SYSLOGD_CFG( (1 << OPTBIT_cfg )) + 0,
|
|
OPT_kmsg = IF_FEATURE_KMSG_SYSLOG( (1 << OPTBIT_kmsg )) + 0,
|
|
};
|
|
#define OPTION_STR "m:nO:l:S" \
|
|
IF_FEATURE_ROTATE_LOGFILE("s:" ) \
|
|
IF_FEATURE_ROTATE_LOGFILE("b:" ) \
|
|
IF_FEATURE_REMOTE_LOG( "R:" ) \
|
|
IF_FEATURE_REMOTE_LOG( "L" ) \
|
|
IF_FEATURE_IPC_SYSLOG( "C::") \
|
|
IF_FEATURE_SYSLOGD_DUP( "D" ) \
|
|
IF_FEATURE_SYSLOGD_CFG( "f:" ) \
|
|
IF_FEATURE_KMSG_SYSLOG( "K" )
|
|
#define OPTION_DECL *opt_m, *opt_l \
|
|
IF_FEATURE_ROTATE_LOGFILE(,*opt_s) \
|
|
IF_FEATURE_ROTATE_LOGFILE(,*opt_b) \
|
|
IF_FEATURE_IPC_SYSLOG( ,*opt_C = NULL) \
|
|
IF_FEATURE_SYSLOGD_CFG( ,*opt_f = NULL)
|
|
#define OPTION_PARAM &opt_m, &(G.logFile.path), &opt_l \
|
|
IF_FEATURE_ROTATE_LOGFILE(,&opt_s) \
|
|
IF_FEATURE_ROTATE_LOGFILE(,&opt_b) \
|
|
IF_FEATURE_REMOTE_LOG( ,&remoteAddrList) \
|
|
IF_FEATURE_IPC_SYSLOG( ,&opt_C) \
|
|
IF_FEATURE_SYSLOGD_CFG( ,&opt_f)
|
|
|
|
|
|
#if ENABLE_FEATURE_SYSLOGD_CFG
|
|
static const CODE* find_by_name(char *name, const CODE* c_set)
|
|
{
|
|
for (; c_set->c_name; c_set++) {
|
|
if (strcmp(name, c_set->c_name) == 0)
|
|
return c_set;
|
|
}
|
|
return NULL;
|
|
}
|
|
#endif
|
|
static const CODE* find_by_val(int val, const CODE* c_set)
|
|
{
|
|
for (; c_set->c_name; c_set++) {
|
|
if (c_set->c_val == val)
|
|
return c_set;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
#if ENABLE_FEATURE_SYSLOGD_CFG
|
|
static void parse_syslogdcfg(const char *file)
|
|
{
|
|
char *t;
|
|
logRule_t **pp_rule;
|
|
/* tok[0] set of selectors */
|
|
/* tok[1] file name */
|
|
/* tok[2] has to be NULL */
|
|
char *tok[3];
|
|
parser_t *parser;
|
|
|
|
parser = config_open2(file ? file : "/etc/syslog.conf",
|
|
file ? xfopen_for_read : fopen_for_read);
|
|
if (!parser)
|
|
/* didn't find default /etc/syslog.conf */
|
|
/* proceed as if we built busybox without config support */
|
|
return;
|
|
|
|
/* use ptr to ptr to avoid checking whether head was initialized */
|
|
pp_rule = &G.log_rules;
|
|
/* iterate through lines of config, skipping comments */
|
|
while (config_read(parser, tok, 3, 2, "# \t", PARSE_NORMAL | PARSE_MIN_DIE)) {
|
|
char *cur_selector;
|
|
logRule_t *cur_rule;
|
|
|
|
/* unexpected trailing token? */
|
|
if (tok[2])
|
|
goto cfgerr;
|
|
|
|
cur_rule = *pp_rule = xzalloc(sizeof(*cur_rule));
|
|
|
|
cur_selector = tok[0];
|
|
/* iterate through selectors: "kern.info;kern.!err;..." */
|
|
do {
|
|
const CODE *code;
|
|
char *next_selector;
|
|
uint8_t negated_prio; /* "kern.!err" */
|
|
uint8_t single_prio; /* "kern.=err" */
|
|
uint32_t facmap; /* bitmap of enabled facilities */
|
|
uint8_t primap; /* bitmap of enabled priorities */
|
|
unsigned i;
|
|
|
|
next_selector = strchr(cur_selector, ';');
|
|
if (next_selector)
|
|
*next_selector++ = '\0';
|
|
|
|
t = strchr(cur_selector, '.');
|
|
if (!t)
|
|
goto cfgerr;
|
|
*t++ = '\0'; /* separate facility from priority */
|
|
|
|
negated_prio = 0;
|
|
single_prio = 0;
|
|
if (*t == '!') {
|
|
negated_prio = 1;
|
|
++t;
|
|
}
|
|
if (*t == '=') {
|
|
single_prio = 1;
|
|
++t;
|
|
}
|
|
|
|
/* parse priority */
|
|
if (*t == '*')
|
|
primap = 0xff; /* all 8 log levels enabled */
|
|
else {
|
|
uint8_t priority;
|
|
code = find_by_name(t, prioritynames);
|
|
if (!code)
|
|
goto cfgerr;
|
|
primap = 0;
|
|
priority = code->c_val;
|
|
if (priority == INTERNAL_NOPRI) {
|
|
/* ensure we take "enabled_facility_priomap[fac] &= 0" branch below */
|
|
negated_prio = 1;
|
|
} else {
|
|
priority = 1 << priority;
|
|
do {
|
|
primap |= priority;
|
|
if (single_prio)
|
|
break;
|
|
priority >>= 1;
|
|
} while (priority);
|
|
if (negated_prio)
|
|
primap = ~primap;
|
|
}
|
|
}
|
|
|
|
/* parse facility */
|
|
if (*cur_selector == '*')
|
|
facmap = (1<<LOG_NFACILITIES) - 1;
|
|
else {
|
|
char *next_facility;
|
|
facmap = 0;
|
|
t = cur_selector;
|
|
/* iterate through facilities: "kern,daemon.<priospec>" */
|
|
do {
|
|
next_facility = strchr(t, ',');
|
|
if (next_facility)
|
|
*next_facility++ = '\0';
|
|
code = find_by_name(t, facilitynames);
|
|
if (!code)
|
|
goto cfgerr;
|
|
/* "mark" is not a real facility, skip it */
|
|
if (code->c_val != INTERNAL_MARK)
|
|
facmap |= 1<<(LOG_FAC(code->c_val));
|
|
t = next_facility;
|
|
} while (t);
|
|
}
|
|
|
|
/* merge result with previous selectors */
|
|
for (i = 0; i < LOG_NFACILITIES; ++i) {
|
|
if (!(facmap & (1<<i)))
|
|
continue;
|
|
if (negated_prio)
|
|
cur_rule->enabled_facility_priomap[i] &= primap;
|
|
else
|
|
cur_rule->enabled_facility_priomap[i] |= primap;
|
|
}
|
|
|
|
cur_selector = next_selector;
|
|
} while (cur_selector);
|
|
|
|
/* check whether current file name was mentioned in previous rules or
|
|
* as global logfile (G.logFile).
|
|
*/
|
|
if (strcmp(G.logFile.path, tok[1]) == 0) {
|
|
cur_rule->file = &G.logFile;
|
|
goto found;
|
|
}
|
|
/* temporarily use cur_rule as iterator, but *pp_rule still points
|
|
* to currently processing rule entry.
|
|
* NOTE: *pp_rule points to the current (and last in the list) rule.
|
|
*/
|
|
for (cur_rule = G.log_rules; cur_rule != *pp_rule; cur_rule = cur_rule->next) {
|
|
if (strcmp(cur_rule->file->path, tok[1]) == 0) {
|
|
/* found - reuse the same file structure */
|
|
(*pp_rule)->file = cur_rule->file;
|
|
cur_rule = *pp_rule;
|
|
goto found;
|
|
}
|
|
}
|
|
cur_rule->file = xzalloc(sizeof(*cur_rule->file));
|
|
cur_rule->file->fd = -1;
|
|
cur_rule->file->path = xstrdup(tok[1]);
|
|
found:
|
|
pp_rule = &cur_rule->next;
|
|
}
|
|
config_close(parser);
|
|
return;
|
|
|
|
cfgerr:
|
|
bb_error_msg_and_die("error in '%s' at line %d",
|
|
file ? file : "/etc/syslog.conf",
|
|
parser->lineno);
|
|
}
|
|
#endif
|
|
|
|
/* circular buffer variables/structures */
|
|
#if ENABLE_FEATURE_IPC_SYSLOG
|
|
|
|
#if CONFIG_FEATURE_IPC_SYSLOG_BUFFER_SIZE < 4
|
|
#error Sorry, you must set the syslogd buffer size to at least 4KB.
|
|
#error Please check CONFIG_FEATURE_IPC_SYSLOG_BUFFER_SIZE
|
|
#endif
|
|
|
|
/* our shared key (syslogd.c and logread.c must be in sync) */
|
|
enum { KEY_ID = 0x414e4547 }; /* "GENA" */
|
|
|
|
static void ipcsyslog_cleanup(void)
|
|
{
|
|
if (G.shmid != -1) {
|
|
shmdt(G.shbuf);
|
|
}
|
|
if (G.shmid != -1) {
|
|
shmctl(G.shmid, IPC_RMID, NULL);
|
|
}
|
|
if (G.s_semid != -1) {
|
|
semctl(G.s_semid, 0, IPC_RMID, 0);
|
|
}
|
|
}
|
|
|
|
static void ipcsyslog_init(void)
|
|
{
|
|
if (DEBUG)
|
|
printf("shmget(%x, %d,...)\n", (int)KEY_ID, G.shm_size);
|
|
|
|
G.shmid = shmget(KEY_ID, G.shm_size, IPC_CREAT | 0644);
|
|
if (G.shmid == -1) {
|
|
bb_perror_msg_and_die("shmget");
|
|
}
|
|
|
|
G.shbuf = shmat(G.shmid, NULL, 0);
|
|
if (G.shbuf == (void*) -1L) { /* shmat has bizarre error return */
|
|
bb_perror_msg_and_die("shmat");
|
|
}
|
|
|
|
memset(G.shbuf, 0, G.shm_size);
|
|
G.shbuf->size = G.shm_size - offsetof(struct shbuf_ds, data) - 1;
|
|
/*G.shbuf->tail = 0;*/
|
|
|
|
/* we'll trust the OS to set initial semval to 0 (let's hope) */
|
|
G.s_semid = semget(KEY_ID, 2, IPC_CREAT | IPC_EXCL | 1023);
|
|
if (G.s_semid == -1) {
|
|
if (errno == EEXIST) {
|
|
G.s_semid = semget(KEY_ID, 2, 0);
|
|
if (G.s_semid != -1)
|
|
return;
|
|
}
|
|
bb_perror_msg_and_die("semget");
|
|
}
|
|
}
|
|
|
|
/* Write message to shared mem buffer */
|
|
static void log_to_shmem(const char *msg)
|
|
{
|
|
int old_tail, new_tail;
|
|
int len;
|
|
|
|
if (semop(G.s_semid, G.SMwdn, 3) == -1) {
|
|
bb_perror_msg_and_die("SMwdn");
|
|
}
|
|
|
|
/* Circular Buffer Algorithm:
|
|
* --------------------------
|
|
* tail == position where to store next syslog message.
|
|
* tail's max value is (shbuf->size - 1)
|
|
* Last byte of buffer is never used and remains NUL.
|
|
*/
|
|
len = strlen(msg) + 1; /* length with NUL included */
|
|
again:
|
|
old_tail = G.shbuf->tail;
|
|
new_tail = old_tail + len;
|
|
if (new_tail < G.shbuf->size) {
|
|
/* store message, set new tail */
|
|
memcpy(G.shbuf->data + old_tail, msg, len);
|
|
G.shbuf->tail = new_tail;
|
|
} else {
|
|
/* k == available buffer space ahead of old tail */
|
|
int k = G.shbuf->size - old_tail;
|
|
/* copy what fits to the end of buffer, and repeat */
|
|
memcpy(G.shbuf->data + old_tail, msg, k);
|
|
msg += k;
|
|
len -= k;
|
|
G.shbuf->tail = 0;
|
|
goto again;
|
|
}
|
|
if (semop(G.s_semid, G.SMwup, 1) == -1) {
|
|
bb_perror_msg_and_die("SMwup");
|
|
}
|
|
if (DEBUG)
|
|
printf("tail:%d\n", G.shbuf->tail);
|
|
}
|
|
#else
|
|
static void ipcsyslog_cleanup(void) {}
|
|
static void ipcsyslog_init(void) {}
|
|
void log_to_shmem(const char *msg);
|
|
#endif /* FEATURE_IPC_SYSLOG */
|
|
|
|
#if ENABLE_FEATURE_KMSG_SYSLOG
|
|
static void kmsg_init(void)
|
|
{
|
|
G.kmsgfd = xopen("/dev/kmsg", O_WRONLY);
|
|
|
|
/*
|
|
* kernel < 3.5 expects single char printk KERN_* priority prefix,
|
|
* from 3.5 onwards the full syslog facility/priority format is supported
|
|
*/
|
|
if (get_linux_version_code() < KERNEL_VERSION(3,5,0))
|
|
G.primask = LOG_PRIMASK;
|
|
else
|
|
G.primask = -1;
|
|
}
|
|
|
|
static void kmsg_cleanup(void)
|
|
{
|
|
if (ENABLE_FEATURE_CLEAN_UP)
|
|
close(G.kmsgfd);
|
|
}
|
|
|
|
/* Write message to /dev/kmsg */
|
|
static void log_to_kmsg(int pri, const char *msg)
|
|
{
|
|
/*
|
|
* kernel < 3.5 expects single char printk KERN_* priority prefix,
|
|
* from 3.5 onwards the full syslog facility/priority format is supported
|
|
*/
|
|
pri &= G.primask;
|
|
|
|
full_write(G.kmsgfd, G.printbuf, sprintf(G.printbuf, "<%d>%s\n", pri, msg));
|
|
}
|
|
#else
|
|
static void kmsg_init(void) {}
|
|
static void kmsg_cleanup(void) {}
|
|
static void log_to_kmsg(int pri UNUSED_PARAM, const char *msg UNUSED_PARAM) {}
|
|
#endif /* FEATURE_KMSG_SYSLOG */
|
|
|
|
/* Print a message to the log file. */
|
|
static void log_locally(time_t now, char *msg, logFile_t *log_file)
|
|
{
|
|
#ifdef SYSLOGD_WRLOCK
|
|
struct flock fl;
|
|
#endif
|
|
int len = strlen(msg);
|
|
|
|
/* fd can't be 0 (we connect fd 0 to /dev/log socket) */
|
|
/* fd is 1 if "-O -" is in use */
|
|
if (log_file->fd > 1) {
|
|
/* Reopen log files every second. This allows admin
|
|
* to delete the files and not worry about restarting us.
|
|
* This costs almost nothing since it happens
|
|
* _at most_ once a second for each file, and happens
|
|
* only when each file is actually written.
|
|
*/
|
|
if (!now)
|
|
now = time(NULL);
|
|
if (log_file->last_log_time != now) {
|
|
log_file->last_log_time = now;
|
|
close(log_file->fd);
|
|
goto reopen;
|
|
}
|
|
}
|
|
else if (log_file->fd == 1) {
|
|
/* We are logging to stdout: do nothing */
|
|
}
|
|
else {
|
|
if (LONE_DASH(log_file->path)) {
|
|
log_file->fd = 1;
|
|
/* log_file->isRegular = 0; - already is */
|
|
} else {
|
|
reopen:
|
|
log_file->fd = open(log_file->path, O_WRONLY | O_CREAT
|
|
| O_NOCTTY | O_APPEND | O_NONBLOCK,
|
|
0666);
|
|
if (log_file->fd < 0) {
|
|
/* cannot open logfile? - print to /dev/console then */
|
|
int fd = device_open(DEV_CONSOLE, O_WRONLY | O_NOCTTY | O_NONBLOCK);
|
|
if (fd < 0)
|
|
fd = 2; /* then stderr, dammit */
|
|
full_write(fd, msg, len);
|
|
if (fd != 2)
|
|
close(fd);
|
|
return;
|
|
}
|
|
#if ENABLE_FEATURE_ROTATE_LOGFILE
|
|
{
|
|
struct stat statf;
|
|
log_file->isRegular = (fstat(log_file->fd, &statf) == 0 && S_ISREG(statf.st_mode));
|
|
/* bug (mostly harmless): can wrap around if file > 4gb */
|
|
log_file->size = statf.st_size;
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
#ifdef SYSLOGD_WRLOCK
|
|
fl.l_whence = SEEK_SET;
|
|
fl.l_start = 0;
|
|
fl.l_len = 1;
|
|
fl.l_type = F_WRLCK;
|
|
fcntl(log_file->fd, F_SETLKW, &fl);
|
|
#endif
|
|
|
|
#if ENABLE_FEATURE_ROTATE_LOGFILE
|
|
if (G.logFileSize && log_file->isRegular && log_file->size > G.logFileSize) {
|
|
if (G.logFileRotate) { /* always 0..99 */
|
|
int i = strlen(log_file->path) + 3 + 1;
|
|
char oldFile[i];
|
|
char newFile[i];
|
|
i = G.logFileRotate - 1;
|
|
/* rename: f.8 -> f.9; f.7 -> f.8; ... */
|
|
while (1) {
|
|
sprintf(newFile, "%s.%d", log_file->path, i);
|
|
if (i == 0) break;
|
|
sprintf(oldFile, "%s.%d", log_file->path, --i);
|
|
/* ignore errors - file might be missing */
|
|
rename(oldFile, newFile);
|
|
}
|
|
/* newFile == "f.0" now */
|
|
rename(log_file->path, newFile);
|
|
}
|
|
|
|
/* We may or may not have just renamed the file away;
|
|
* if we didn't rename because we aren't keeping any backlog,
|
|
* then it's time to clobber the file. If we did rename it...,
|
|
* incredibly, if F and F.0 are hardlinks, POSIX _demands_
|
|
* that rename returns 0 but does not remove F!!!
|
|
* (hardlinked F/F.0 pair was observed after
|
|
* power failure during rename()).
|
|
* So ensure old file is gone in any case:
|
|
*/
|
|
unlink(log_file->path);
|
|
#ifdef SYSLOGD_WRLOCK
|
|
fl.l_type = F_UNLCK;
|
|
fcntl(log_file->fd, F_SETLKW, &fl);
|
|
#endif
|
|
close(log_file->fd);
|
|
goto reopen;
|
|
}
|
|
/* TODO: what to do on write errors ("disk full")? */
|
|
len = full_write(log_file->fd, msg, len);
|
|
if (len > 0)
|
|
log_file->size += len;
|
|
#else
|
|
full_write(log_file->fd, msg, len);
|
|
#endif
|
|
|
|
#ifdef SYSLOGD_WRLOCK
|
|
fl.l_type = F_UNLCK;
|
|
fcntl(log_file->fd, F_SETLKW, &fl);
|
|
#endif
|
|
}
|
|
|
|
static void parse_fac_prio_20(int pri, char *res20)
|
|
{
|
|
const CODE *c_pri, *c_fac;
|
|
|
|
c_fac = find_by_val(LOG_FAC(pri) << 3, facilitynames);
|
|
if (c_fac) {
|
|
c_pri = find_by_val(LOG_PRI(pri), prioritynames);
|
|
if (c_pri) {
|
|
snprintf(res20, 20, "%s.%s", c_fac->c_name, c_pri->c_name);
|
|
return;
|
|
}
|
|
}
|
|
snprintf(res20, 20, "<%d>", pri);
|
|
}
|
|
|
|
/* len parameter is used only for "is there a timestamp?" check.
|
|
* NB: some callers cheat and supply len==0 when they know
|
|
* that there is no timestamp, short-circuiting the test. */
|
|
static void timestamp_and_log(int pri, char *msg, int len)
|
|
{
|
|
char *timestamp;
|
|
time_t now;
|
|
|
|
/* Jan 18 00:11:22 msg... */
|
|
/* 01234567890123456 */
|
|
if (len < 16 || msg[3] != ' ' || msg[6] != ' '
|
|
|| msg[9] != ':' || msg[12] != ':' || msg[15] != ' '
|
|
) {
|
|
time(&now);
|
|
timestamp = ctime(&now) + 4; /* skip day of week */
|
|
} else {
|
|
now = 0;
|
|
timestamp = msg;
|
|
msg += 16;
|
|
}
|
|
timestamp[15] = '\0';
|
|
|
|
if (option_mask32 & OPT_kmsg) {
|
|
log_to_kmsg(pri, msg);
|
|
return;
|
|
}
|
|
|
|
if (option_mask32 & OPT_small)
|
|
sprintf(G.printbuf, "%s %s\n", timestamp, msg);
|
|
else {
|
|
char res[20];
|
|
parse_fac_prio_20(pri, res);
|
|
sprintf(G.printbuf, "%s %.64s %s %s\n", timestamp, G.hostname, res, msg);
|
|
}
|
|
|
|
/* Log message locally (to file or shared mem) */
|
|
#if ENABLE_FEATURE_SYSLOGD_CFG
|
|
{
|
|
bool match = 0;
|
|
logRule_t *rule;
|
|
uint8_t facility = LOG_FAC(pri);
|
|
uint8_t prio_bit = 1 << LOG_PRI(pri);
|
|
|
|
for (rule = G.log_rules; rule; rule = rule->next) {
|
|
if (rule->enabled_facility_priomap[facility] & prio_bit) {
|
|
log_locally(now, G.printbuf, rule->file);
|
|
match = 1;
|
|
}
|
|
}
|
|
if (match)
|
|
return;
|
|
}
|
|
#endif
|
|
if (LOG_PRI(pri) < G.logLevel) {
|
|
#if ENABLE_FEATURE_IPC_SYSLOG
|
|
if ((option_mask32 & OPT_circularlog) && G.shbuf) {
|
|
log_to_shmem(G.printbuf);
|
|
return;
|
|
}
|
|
#endif
|
|
log_locally(now, G.printbuf, &G.logFile);
|
|
}
|
|
}
|
|
|
|
static void timestamp_and_log_internal(const char *msg)
|
|
{
|
|
/* -L, or no -R */
|
|
if (ENABLE_FEATURE_REMOTE_LOG && !(option_mask32 & OPT_locallog))
|
|
return;
|
|
timestamp_and_log(LOG_SYSLOG | LOG_INFO, (char*)msg, 0);
|
|
}
|
|
|
|
/* tmpbuf[len] is a NUL byte (set by caller), but there can be other,
|
|
* embedded NULs. Split messages on each of these NULs, parse prio,
|
|
* escape control chars and log each locally. */
|
|
static void split_escape_and_log(char *tmpbuf, int len)
|
|
{
|
|
char *p = tmpbuf;
|
|
|
|
tmpbuf += len;
|
|
while (p < tmpbuf) {
|
|
char c;
|
|
char *q = G.parsebuf;
|
|
int pri = (LOG_USER | LOG_NOTICE);
|
|
|
|
if (*p == '<') {
|
|
/* Parse the magic priority number */
|
|
pri = bb_strtou(p + 1, &p, 10);
|
|
if (*p == '>')
|
|
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 */
|
|
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, _PATH_LOG);
|
|
dev_log_name = xmalloc_follow_symlinks(_PATH_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(_PATH_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 xsocket(rh->remoteAddr->u.sa.sa_family, SOCK_DGRAM, 0);
|
|
}
|
|
#endif
|
|
|
|
static void do_syslogd(void) NORETURN;
|
|
static void do_syslogd(void)
|
|
{
|
|
#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
|
|
xmove_fd(create_socket(), STDIN_FILENO);
|
|
|
|
if (option_mask32 & OPT_circularlog)
|
|
ipcsyslog_init();
|
|
|
|
if (option_mask32 & OPT_kmsg)
|
|
kmsg_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(STDIN_FILENO, recvbuf, MAX_READ - 1);
|
|
if (sz < 0) {
|
|
if (!bb_got_signal)
|
|
bb_perror_msg("read from %s", _PATH_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.
|
|
* On some errors, close and set remoteFD to -1
|
|
* so that DNS resolution is retried.
|
|
*/
|
|
if (sendto(rh->remoteFD, recvbuf, sz+1,
|
|
MSG_DONTWAIT | MSG_NOSIGNAL,
|
|
&(rh->remoteAddr->u.sa), rh->remoteAddr->len) == -1
|
|
) {
|
|
switch (errno) {
|
|
case ECONNRESET:
|
|
case ENOTCONN: /* paranoia */
|
|
case EPIPE:
|
|
close(rh->remoteFD);
|
|
rh->remoteFD = -1;
|
|
free(rh->remoteAddr);
|
|
rh->remoteAddr = NULL;
|
|
}
|
|
}
|
|
}
|
|
#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");
|
|
remove_pidfile(CONFIG_PID_FILE_PATH "/syslogd.pid");
|
|
ipcsyslog_cleanup();
|
|
if (option_mask32 & OPT_kmsg)
|
|
kmsg_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;
|
|
#if ENABLE_FEATURE_SYSLOGD_CFG
|
|
parse_syslogdcfg(opt_f);
|
|
#endif
|
|
|
|
/* 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(CONFIG_PID_FILE_PATH "/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
|