*
* Maintainer: Gennady Feldman <gfeldman@gena01.com> as of Mar 12, 2001
*
- * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
+//config:config SYSLOGD
+//config: bool "syslogd (13 kb)"
+//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_PRECISE_TIMESTAMPS
+//config: bool "Include milliseconds in timestamps"
+//config: default n
+//config: depends on SYSLOGD
+//config: help
+//config: Includes milliseconds (HH:MM:SS.mmm) in timestamp when
+//config: timestamps are added.
+//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+.
-#include "libbb.h"
-#include <paths.h>
-#include <sys/un.h>
+//applet:IF_SYSLOGD(APPLET(syslogd, BB_DIR_SBIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_SYSLOGD) += syslogd_and_logger.o
+
+//usage:#define syslogd_trivial_usage
+//usage: "[OPTIONS]"
+//usage:#define syslogd_full_usage "\n\n"
+//usage: "System logging utility\n"
+//usage: IF_NOT_FEATURE_SYSLOGD_CFG(
+//usage: "(this version of syslogd ignores /etc/syslog.conf)\n"
+//usage: )
+//usage: "\n -n Run in foreground"
+//usage: IF_FEATURE_REMOTE_LOG(
+//usage: "\n -R HOST[:PORT] Log to HOST:PORT (default PORT:514)"
+//usage: "\n -L Log locally and via network (default is network only if -R)"
+//usage: )
+//usage: IF_FEATURE_IPC_SYSLOG(
+/* NB: -Csize shouldn't have space (because size is optional) */
+//usage: "\n -C[size_kb] Log to shared mem buffer (use logread to read it)"
+//usage: )
+//usage: IF_FEATURE_KMSG_SYSLOG(
+//usage: "\n -K Log to kernel printk buffer (use dmesg to read it)"
+//usage: )
+//usage: "\n -O FILE Log to FILE (default: /var/log/messages, stdout if -)"
+//usage: IF_FEATURE_ROTATE_LOGFILE(
+//usage: "\n -s SIZE Max size (KB) before rotation (default 200KB, 0=off)"
+//usage: "\n -b N N rotated logs to keep (default 1, max 99, 0=purge)"
+//usage: )
+//usage: "\n -l N Log only messages more urgent than prio N (1-8)"
+//usage: "\n -S Smaller output"
+//usage: "\n -t Strip client-generated timestamps"
+//usage: IF_FEATURE_SYSLOGD_DUP(
+//usage: "\n -D Drop duplicates"
+//usage: )
+//usage: IF_FEATURE_SYSLOGD_CFG(
+//usage: "\n -f FILE Use FILE as config (default:/etc/syslog.conf)"
+//usage: )
+/* //usage: "\n -m MIN Minutes between MARK lines (default 20, 0=off)" */
+//usage:
+//usage:#define syslogd_example_usage
+//usage: "$ syslogd -R masterlog:514\n"
+//usage: "$ syslogd -R 192.168.1.1:601\n"
-/* SYSLOG_NAMES defined to pull prioritynames[] and facilitynames[]
- * from syslog.h. Grrrr - glibc puts those in _rwdata_! :( */
+/*
+ * Done in syslogd_and_logger.c:
+#include "libbb.h"
#define SYSLOG_NAMES
-#define SYSLOG_NAMES_CONST /* uclibc is saner :) */
-#include <sys/syslog.h>
+#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
* (semaphores are down but do_mark routine tries to down them again) */
#undef SYSLOGD_MARK
-enum { MAX_READ = 256 };
+/* 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 {
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 \
- const char *logFilePath; \
- int logFD; \
+ logFile_t logFile; \
/* interval between marks in seconds */ \
/*int markInterval;*/ \
/* level of messages to be logged */ \
int logLevel; \
-USE_FEATURE_ROTATE_LOGFILE( \
+IF_FEATURE_ROTATE_LOGFILE( \
/* max size of file before rotation */ \
unsigned logFileSize; \
/* number of rotated message files */ \
unsigned logFileRotate; \
- unsigned curFileSize; \
- smallint isRegular; \
-) \
-USE_FEATURE_REMOTE_LOG( \
- /* udp socket for remote logging */ \
- int remoteFD; \
- len_and_sockaddr* remoteAddr; \
) \
-USE_FEATURE_IPC_SYSLOG( \
+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 {
struct globals {
GLOBALS
+
+#if ENABLE_FEATURE_REMOTE_LOG
+ llist_t *remoteHosts;
+#endif
#if ENABLE_FEATURE_IPC_SYSLOG
struct shbuf_ds *shbuf;
#endif
- time_t last_log_time;
- /* localhost's name */
- char localHostName[64];
+ /* localhost's name. We print only first 64 chars */
+ char *hostname;
/* We recv into recvbuf... */
- char recvbuf[MAX_READ];
+ 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),
+ /* ...then sprintf into printbuf, adding timestamp (15 or 19 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 = {
- .logFilePath = "/var/log/messages",
- .logFD = -1,
+ .logFile = {
+ .path = "/var/log/messages",
+ .fd = -1,
+ },
#ifdef SYSLOGD_MARK
.markInterval = 20 * 60,
#endif
.logFileSize = 200 * 1024,
.logFileRotate = 1,
#endif
-#if ENABLE_FEATURE_REMOTE_LOG
- .remoteFD = -1,
-#endif
#if ENABLE_FEATURE_IPC_SYSLOG
.shmid = -1,
.s_semid = -1,
- .shm_size = ((CONFIG_FEATURE_IPC_SYSLOG_BUFFER_SIZE)*1024), // default shm size
+ .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 */
OPTBIT_outfile, // -O
OPTBIT_loglevel, // -l
OPTBIT_small, // -S
- USE_FEATURE_ROTATE_LOGFILE(OPTBIT_filesize ,) // -s
- USE_FEATURE_ROTATE_LOGFILE(OPTBIT_rotatecnt ,) // -b
- USE_FEATURE_REMOTE_LOG( OPTBIT_remote ,) // -R
- USE_FEATURE_REMOTE_LOG( OPTBIT_localtoo ,) // -L
- USE_FEATURE_IPC_SYSLOG( OPTBIT_circularlog,) // -C
+ OPTBIT_timestamp, // -t
+ 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 = USE_FEATURE_ROTATE_LOGFILE((1 << OPTBIT_filesize )) + 0,
- OPT_rotatecnt = USE_FEATURE_ROTATE_LOGFILE((1 << OPTBIT_rotatecnt )) + 0,
- OPT_remotelog = USE_FEATURE_REMOTE_LOG( (1 << OPTBIT_remote )) + 0,
- OPT_locallog = USE_FEATURE_REMOTE_LOG( (1 << OPTBIT_localtoo )) + 0,
- OPT_circularlog = USE_FEATURE_IPC_SYSLOG( (1 << OPTBIT_circularlog)) + 0,
+ OPT_timestamp = 1 << OPTBIT_timestamp,
+ 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" \
- USE_FEATURE_ROTATE_LOGFILE("s:" ) \
- USE_FEATURE_ROTATE_LOGFILE("b:" ) \
- USE_FEATURE_REMOTE_LOG( "R:" ) \
- USE_FEATURE_REMOTE_LOG( "L" ) \
- USE_FEATURE_IPC_SYSLOG( "C::")
+#define OPTION_STR "m:nO:l:St" \
+ 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 \
- USE_FEATURE_ROTATE_LOGFILE(,*opt_s) \
- USE_FEATURE_ROTATE_LOGFILE(,*opt_b) \
- USE_FEATURE_REMOTE_LOG( ,*opt_R) \
- USE_FEATURE_IPC_SYSLOG( ,*opt_C = NULL)
-#define OPTION_PARAM &opt_m, &G.logFilePath, &opt_l \
- USE_FEATURE_ROTATE_LOGFILE(,&opt_s) \
- USE_FEATURE_ROTATE_LOGFILE(,&opt_b) \
- USE_FEATURE_REMOTE_LOG( ,&opt_R) \
- USE_FEATURE_IPC_SYSLOG( ,&opt_C)
+ 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, bb_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, bb_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
#error Please check CONFIG_FEATURE_IPC_SYSLOG_BUFFER_SIZE
#endif
-/* our shared key */
-#define KEY_ID ((long)0x414e4547) /* "GENA" */
+/* our shared key (syslogd.c and logread.c must be in sync) */
+enum { KEY_ID = 0x414e4547 }; /* "GENA" */
static void ipcsyslog_cleanup(void)
{
static void ipcsyslog_init(void)
{
if (DEBUG)
- printf("shmget(%lx, %d,...)\n", KEY_ID, G.shm_size);
+ 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");
+ bb_simple_perror_msg_and_die("shmget");
}
G.shbuf = shmat(G.shmid, NULL, 0);
- if (!G.shbuf) {
- bb_perror_msg_and_die("shmat");
+ if (G.shbuf == (void*) -1L) { /* shmat has bizarre error return */
+ bb_simple_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)
+ /* 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) {
if (G.s_semid != -1)
return;
}
- bb_perror_msg_and_die("semget");
+ bb_simple_perror_msg_and_die("semget");
}
}
/* Write message to shared mem buffer */
-static void log_to_shmem(const char *msg, int len)
+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");
+ bb_simple_perror_msg_and_die("SMwdn");
}
/* Circular Buffer Algorithm:
* tail's max value is (shbuf->size - 1)
* Last byte of buffer is never used and remains NUL.
*/
- len++; /* length with NUL included */
+ len = strlen(msg) + 1; /* length with NUL included */
again:
old_tail = G.shbuf->tail;
new_tail = old_tail + len;
goto again;
}
if (semop(G.s_semid, G.SMwup, 1) == -1) {
- bb_perror_msg_and_die("SMwup");
+ bb_simple_perror_msg_and_die("SMwup");
}
if (DEBUG)
printf("tail:%d\n", G.shbuf->tail);
}
#else
-void ipcsyslog_cleanup(void);
-void ipcsyslog_init(void);
+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(char *msg)
+static void log_locally(time_t now, char *msg, logFile_t *log_file)
{
+#ifdef SYSLOGD_WRLOCK
struct flock fl;
+#endif
int len = strlen(msg);
-#if ENABLE_FEATURE_IPC_SYSLOG
- if ((option_mask32 & OPT_circularlog) && G.shbuf) {
- log_to_shmem(msg, len);
- return;
- }
-#endif
- if (G.logFD >= 0) {
- time_t cur;
- time(&cur);
- if (G.last_log_time != cur) {
- G.last_log_time = cur; /* reopen log file every second */
- close(G.logFD);
+ /* 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 {
+ }
+ 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:
- G.logFD = device_open(G.logFilePath, O_WRONLY | O_CREAT
- | O_NOCTTY | O_APPEND | O_NONBLOCK);
- if (G.logFD < 0) {
- /* cannot open logfile? - print to /dev/console then */
- int fd = device_open(_PATH_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;
- }
+ 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;
- G.isRegular = (fstat(G.logFD, &statf) == 0 && S_ISREG(statf.st_mode));
- /* bug (mostly harmless): can wrap around if file > 4gb */
- G.curFileSize = statf.st_size;
- }
+ {
+ 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(G.logFD, F_SETLKW, &fl);
+ fcntl(log_file->fd, F_SETLKW, &fl);
+#endif
#if ENABLE_FEATURE_ROTATE_LOGFILE
- if (G.logFileSize && G.isRegular && G.curFileSize > G.logFileSize) {
+ if (G.logFileSize && log_file->isRegular && log_file->size > G.logFileSize) {
if (G.logFileRotate) { /* always 0..99 */
- int i = strlen(G.logFilePath) + 3 + 1;
+ 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", G.logFilePath, i);
+ sprintf(newFile, "%s.%d", log_file->path, i);
if (i == 0) break;
- sprintf(oldFile, "%s.%d", G.logFilePath, --i);
+ sprintf(oldFile, "%s.%d", log_file->path, --i);
+ /* ignore errors - file might be missing */
rename(oldFile, newFile);
}
/* newFile == "f.0" now */
- rename(G.logFilePath, newFile);
- fl.l_type = F_UNLCK;
- fcntl(G.logFD, F_SETLKW, &fl);
- close(G.logFD);
- goto reopen;
+ rename(log_file->path, newFile);
}
- ftruncate(G.logFD, 0);
+
+ /* 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;
}
- G.curFileSize +=
+/* 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
- full_write(G.logFD, msg, len);
+
+#ifdef SYSLOGD_WRLOCK
fl.l_type = F_UNLCK;
- fcntl(G.logFD, F_SETLKW, &fl);
+ fcntl(log_file->fd, F_SETLKW, &fl);
+#endif
}
static void parse_fac_prio_20(int pri, char *res20)
{
const CODE *c_pri, *c_fac;
- if (pri != 0) {
- c_fac = facilitynames;
- while (c_fac->c_name) {
- if (c_fac->c_val != (LOG_FAC(pri) << 3)) {
- c_fac++; continue;
- }
- /* facility is found, look for prio */
- c_pri = prioritynames;
- while (c_pri->c_name) {
- if (c_pri->c_val != LOG_PRI(pri)) {
- c_pri++; continue;
- }
- snprintf(res20, 20, "%s.%s",
- c_fac->c_name, c_pri->c_name);
- return;
- }
- /* prio not found, bail out */
- break;
+ c_fac = find_by_val(LOG_FAC(pri) << 3, bb_facilitynames);
+ if (c_fac) {
+ c_pri = find_by_val(LOG_PRI(pri), bb_prioritynames);
+ if (c_pri) {
+ snprintf(res20, 20, "%s.%s", c_fac->c_name, c_pri->c_name);
+ return;
}
- snprintf(res20, 20, "<%d>", pri);
}
+ snprintf(res20, 20, "<%d>", pri);
}
/* len parameter is used only for "is there a timestamp?" check.
- * NB: some callers cheat and supply 0 when they know
- * that there is no timestamp, short-cutting the test. */
+ * 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;
+ char *timestamp = NULL;
+ time_t now;
- if (len < 16 || msg[3] != ' ' || msg[6] != ' '
- || msg[9] != ':' || msg[12] != ':' || msg[15] != ' '
+ /* Jan 18 00:11:22 msg... */
+ /* 01234567890123456 */
+ if (len >= 16 && msg[3] == ' ' && msg[6] == ' '
+ && msg[9] == ':' && msg[12] == ':' && msg[15] == ' '
) {
- time_t now;
- time(&now);
- timestamp = ctime(&now) + 4;
- } else {
- timestamp = msg;
+ if (!(option_mask32 & OPT_timestamp)) {
+ /* use message timestamp */
+ timestamp = msg;
+ now = 0;
+ }
msg += 16;
}
+
+#if ENABLE_FEATURE_SYSLOGD_PRECISE_TIMESTAMPS
+ if (!timestamp) {
+ struct timeval tv;
+ gettimeofday(&tv, NULL);
+ now = tv.tv_sec;
+ timestamp = ctime(&now) + 4; /* skip day of week */
+ /* overwrite year by milliseconds, zero terminate */
+ sprintf(timestamp + 15, ".%03u", (unsigned)tv.tv_usec / 1000u);
+ } else {
+ timestamp[15] = '\0';
+ }
+#else
+ if (!timestamp) {
+ time(&now);
+ timestamp = ctime(&now) + 4; /* skip day of week */
+ }
timestamp[15] = '\0';
+#endif
+
+ 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_REMOTE_LOG || (option_mask32 & OPT_locallog)) {
- if (LOG_PRI(pri) < G.logLevel) {
- 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 %s %s %s\n", timestamp, G.localHostName, res, msg);
+#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;
}
- log_locally(G.printbuf);
}
+ 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;
if (*p == '<') {
/* Parse the magic priority number */
pri = bb_strtou(p + 1, &p, 10);
- if (*p == '>') p++;
- if (pri & ~(LOG_FACMASK | LOG_PRIMASK)) {
+ if (*p == '>')
+ p++;
+ if (pri & ~(LOG_FACMASK | LOG_PRIMASK))
pri = (LOG_USER | LOG_NOTICE);
- }
}
while ((c = *p++)) {
*q++ = c;
}
*q = '\0';
+
/* Now log it */
timestamp_and_log(pri, G.parsebuf, q - G.parsebuf);
}
}
-static void quit_signal(int sig)
-{
- timestamp_and_log(LOG_SYSLOG | LOG_INFO, (char*)"syslogd exiting", 0);
- puts("syslogd exiting");
- if (ENABLE_FEATURE_IPC_SYSLOG)
- ipcsyslog_cleanup();
- exit(1);
-}
-
#ifdef SYSLOGD_MARK
static void do_mark(int sig)
{
if (G.markInterval) {
- timestamp_and_log(LOG_SYSLOG | LOG_INFO, (char*)"-- MARK --", 0);
+ timestamp_and_log_internal("-- MARK --");
alarm(G.markInterval);
}
}
#endif
-static void do_syslogd(void) ATTRIBUTE_NORETURN;
-static void do_syslogd(void)
+/* 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;
- fd_set fds;
char *dev_log_name;
- /* Set up signal handlers */
- signal(SIGINT, quit_signal);
- signal(SIGTERM, quit_signal);
- signal(SIGQUIT, quit_signal);
- signal(SIGHUP, SIG_IGN);
- signal(SIGCHLD, SIG_IGN);
-#ifdef SIGCLD
- signal(SIGCLD, SIG_IGN);
-#endif
-#ifdef SYSLOGD_MARK
- signal(SIGALRM, do_mark);
- alarm(G.markInterval);
-#endif
- remove_pidfile("/var/run/syslogd.pid");
-
memset(&sunx, 0, sizeof(sunx));
sunx.sun_family = AF_UNIX;
- strcpy(sunx.sun_path, "/dev/log");
/* Unlink old /dev/log or object it points to. */
/* (if it exists, bind will fail) */
- logmode = LOGMODE_NONE;
- dev_log_name = xmalloc_readlink_or_warn("/dev/log");
- logmode = LOGMODE_STDIO;
+ strcpy(sunx.sun_path, _PATH_LOG);
+ dev_log_name = xmalloc_follow_symlinks(_PATH_LOG);
if (dev_log_name) {
- int fd = xopen(".", O_NONBLOCK);
- xchdir("/dev");
- /* we do not check whether this is a link also */
- unlink(dev_log_name);
- fchdir(fd);
- close(fd);
safe_strncpy(sunx.sun_path, dev_log_name, sizeof(sunx.sun_path));
free(dev_log_name);
- } else {
- unlink("/dev/log");
}
+ unlink(sunx.sun_path);
sock_fd = xsocket(AF_UNIX, SOCK_DGRAM, 0);
xbind(sock_fd, (struct sockaddr *) &sunx, sizeof(sunx));
+ chmod(_PATH_LOG, 0666);
- if (chmod("/dev/log", 0666) < 0) {
- bb_perror_msg_and_die("cannot set permission on /dev/log");
+ 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;
}
- if (ENABLE_FEATURE_IPC_SYSLOG && (option_mask32 & OPT_circularlog)) {
+ 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();
- }
- timestamp_and_log(LOG_SYSLOG | LOG_INFO,
- (char*)"syslogd started: BusyBox v" BB_VER, 0);
+ if (option_mask32 & OPT_kmsg)
+ kmsg_init();
- for (;;) {
- FD_ZERO(&fds);
- FD_SET(sock_fd, &fds);
+ timestamp_and_log_internal("syslogd started: BusyBox v" BB_VER);
- if (select(sock_fd + 1, &fds, NULL, NULL, NULL) < 0) {
- if (errno == EINTR) {
- /* alarm may have happened */
- continue;
- }
- bb_perror_msg_and_die("select");
+ 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;
}
- if (FD_ISSET(sock_fd, &fds)) {
- int i;
- i = recv(sock_fd, G.recvbuf, MAX_READ - 1, 0);
- if (i <= 0)
- bb_perror_msg_and_die("UNIX socket error");
- /* TODO: maybe suppress duplicates? */
+ /* 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
- /* We are not modifying log messages in any way before send */
- /* Remote site cannot trust _us_ anyway and need to do validation again */
- if (G.remoteAddr) {
- if (-1 == G.remoteFD) {
- G.remoteFD = socket(G.remoteAddr->sa.sa_family, SOCK_DGRAM, 0);
- }
- if (-1 != G.remoteFD) {
- /* send message to remote logger, ignore possible error */
- sendto(G.remoteFD, G.recvbuf, i, MSG_DONTWAIT,
- &G.remoteAddr->sa, G.remoteAddr->len);
+ /* 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
- G.recvbuf[i] = '\0';
- split_escape_and_log(G.recvbuf, i);
- } /* FD_ISSET() */
- } /* for */
+ 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_std_path_and_ext("syslogd");
+ 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);
-int syslogd_main(int argc, char **argv)
+int syslogd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int syslogd_main(int argc UNUSED_PARAM, char **argv)
{
+ int opts;
char OPTION_DECL;
- char *p;
+#if ENABLE_FEATURE_REMOTE_LOG
+ llist_t *remoteAddrList = NULL;
+#endif
- PTR_TO_GLOBALS = memcpy(xzalloc(sizeof(G)), &init_data, sizeof(init_data));
+ INIT_G();
+
+ /* No non-option params */
+ opts = getopt32(argv, "^"OPTION_STR"\0""=0", 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
- /* do normal option parsing */
- opt_complementary = "=0"; /* no non-option params */
- getopt32(argc, argv, OPTION_STR, OPTION_PARAM);
#ifdef SYSLOGD_MARK
- if (option_mask32 & OPT_mark) // -m
+ if (opts & OPT_mark) // -m
G.markInterval = xatou_range(opt_m, 0, INT_MAX/60) * 60;
#endif
- //if (option_mask32 & OPT_nofork) // -n
- //if (option_mask32 & OPT_outfile) // -O
- if (option_mask32 & OPT_loglevel) // -l
+ //if (opts & OPT_nofork) // -n
+ //if (opts & OPT_outfile) // -O
+ if (opts & OPT_loglevel) // -l
G.logLevel = xatou_range(opt_l, 1, 8);
- //if (option_mask32 & OPT_small) // -S
+ //if (opts & OPT_small) // -S
#if ENABLE_FEATURE_ROTATE_LOGFILE
- if (option_mask32 & OPT_filesize) // -s
+ if (opts & OPT_filesize) // -s
G.logFileSize = xatou_range(opt_s, 0, INT_MAX/1024) * 1024;
- if (option_mask32 & OPT_rotatecnt) // -b
+ if (opts & OPT_rotatecnt) // -b
G.logFileRotate = xatou_range(opt_b, 0, 99);
#endif
-#if ENABLE_FEATURE_REMOTE_LOG
- if (option_mask32 & OPT_remotelog) { // -R
- G.remoteAddr = xhost2sockaddr(opt_R, 514);
- }
- //if (option_mask32 & OPT_locallog) // -L
-#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 && !(option_mask32 & OPT_remotelog))
+ 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 */
- gethostname(G.localHostName, sizeof(G.localHostName));
- p = strchr(G.localHostName, '.');
- if (p) {
- *p = '\0';
- }
+ G.hostname = safe_gethostname();
+ *strchrnul(G.hostname, '.') = '\0';
- if (!(option_mask32 & OPT_nofork)) {
+ if (!(opts & OPT_nofork)) {
bb_daemonize_or_rexec(DAEMON_CHDIR_ROOT, argv);
}
- umask(0);
- write_pidfile("/var/run/syslogd.pid");
+
+ //umask(0); - why??
+ write_pidfile_std_path_and_ext("syslogd");
+
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
projects / oweals / busybox.git / blobdiff