busybox/runit/svlogd.c

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/*
Copyright (c) 2001-2006, Gerrit Pape
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. The name of the author may not be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ''AS IS'' AND ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* Busyboxed by Denys Vlasenko <vda.linux@googlemail.com> */
/*
Config files
On startup, and after receiving a HUP signal, svlogd checks for each
log directory log if the configuration file log/config exists,
and if so, reads the file line by line and adjusts configuration
for log as follows:
If the line is empty, or starts with a #, it is ignored. A line
of the form
ssize
sets the maximum file size of current when svlogd should rotate
the current log file to size bytes. Default is 1000000.
If size is zero, svlogd doesnt rotate log files
You should set size to at least (2 * len).
nnum
sets the number of old log files svlogd should maintain to num.
If svlogd sees more that num old log files in log after log file
rotation, it deletes the oldest one. Default is 10.
If num is zero, svlogd doesnt remove old log files.
Nmin
sets the minimum number of old log files svlogd should maintain
to min. min must be less than num. If min is set, and svlogd
cannot write to current because the filesystem is full,
and it sees more than min old log files, it deletes the oldest one.
ttimeout
sets the maximum age of the current log file when svlogd should
rotate the current log file to timeout seconds. If current
is timeout seconds old, and is not empty, svlogd forces log file rotation.
!processor
tells svlogd to feed each recent log file through processor
(see above) on log file rotation. By default log files are not processed.
ua.b.c.d[:port]
tells svlogd to transmit the first len characters of selected
log messages to the IP address a.b.c.d, port number port.
If port isnt set, the default port for syslog is used (514).
len can be set through the -l option, see below. If svlogd
has trouble sending udp packets, it writes error messages
to the log directory. Attention: logging through udp is unreliable,
and should be used in private networks only.
Ua.b.c.d[:port]
is the same as the u line above, but the log messages are no longer
written to the log directory, but transmitted through udp only.
Error messages from svlogd concerning sending udp packages still go
to the log directory.
pprefix
tells svlogd to prefix each line to be written to the log directory,
to standard error, or through UDP, with prefix.
If a line starts with a -, +, e, or E, svlogd matches the first len characters
of each log message against pattern and acts accordingly:
-pattern
the log message is deselected.
+pattern
the log message is selected.
epattern
the log message is selected to be printed to standard error.
Epattern
the log message is deselected to be printed to standard error.
Initially each line is selected to be written to log/current. Deselected
log messages are discarded from log. Initially each line is deselected
to be written to standard err. Log messages selected for standard error
are written to standard error.
Pattern Matching
svlogd matches a log message against the string pattern as follows:
pattern is applied to the log message one character by one, starting
with the first. A character not a star (*) and not a plus (+) matches itself.
A plus matches the next character in pattern in the log message one
or more times. A star before the end of pattern matches any string
in the log message that does not include the next character in pattern.
A star at the end of pattern matches any string.
Timestamps optionally added by svlogd are not considered part
of the log message.
An svlogd pattern is not a regular expression. For example consider
a log message like this
2005-12-18_09:13:50.97618 tcpsvd: info: pid 1977 from 10.4.1.14
The following pattern doesnt match
-*pid*
because the first star matches up to the first p in tcpsvd,
and then the match fails because i is not s. To match this
log message, you can use a pattern like this instead
-*: *: pid *
*/
//config:config SVLOGD
//config: bool "svlogd (15 kb)"
//config: default y
//config: help
//config: svlogd continuously reads log data from its standard input, optionally
//config: filters log messages, and writes the data to one or more automatically
//config: rotated logs.
//applet:IF_SVLOGD(APPLET(svlogd, BB_DIR_USR_SBIN, BB_SUID_DROP))
//kbuild:lib-$(CONFIG_SVLOGD) += svlogd.o
//usage:#define svlogd_trivial_usage
//usage: "[-tttv] [-r C] [-R CHARS] [-l MATCHLEN] [-b BUFLEN] DIR..."
//usage:#define svlogd_full_usage "\n\n"
//usage: "Read log data from stdin and write to rotated log files in DIRs"
//usage: "\n"
//usage: "\n""-r C Replace non-printable characters with C"
//usage: "\n""-R CHARS Also replace CHARS with C (default _)"
//usage: "\n""-t Timestamp with @tai64n"
//usage: "\n""-tt Timestamp with yyyy-mm-dd_hh:mm:ss.sssss"
//usage: "\n""-ttt Timestamp with yyyy-mm-ddThh:mm:ss.sssss"
//usage: "\n""-v Verbose"
//usage: "\n"
//usage: "\n""DIR/config file modifies behavior:"
//usage: "\n""sSIZE - when to rotate logs (default 1000000, 0 disables)"
//usage: "\n""nNUM - number of files to retain"
///////: "\n""NNUM - min number files to retain" - confusing
///////: "\n""tSEC - rotate file if it get SEC seconds old" - confusing
//usage: "\n""!PROG - process rotated log with PROG"
///////: "\n""uIPADDR - send log over UDP" - unsupported
///////: "\n""UIPADDR - send log over UDP and DONT log" - unsupported
///////: "\n""pPFX - prefix each line with PFX" - unsupported
//usage: "\n""+,-PATTERN - (de)select line for logging"
//usage: "\n""E,ePATTERN - (de)select line for stderr"
#include <sys/file.h>
#include "libbb.h"
#include "common_bufsiz.h"
#include "runit_lib.h"
#define LESS(a,b) ((int)((unsigned)(b) - (unsigned)(a)) > 0)
#define FMT_PTIME 30
struct logdir {
////char *btmp;
/* pattern list to match, in "aa\0bb\0\cc\0\0" form */
char *inst;
char *processor;
char *name;
unsigned size;
unsigned sizemax;
unsigned nmax;
unsigned nmin;
unsigned rotate_period;
int ppid;
int fddir;
int fdcur;
FILE* filecur; ////
int fdlock;
unsigned next_rotate;
char fnsave[FMT_PTIME];
char match;
char matcherr;
};
struct globals {
struct logdir *dir;
unsigned verbose;
int linemax;
////int buflen;
int linelen;
int fdwdir;
char **fndir;
int wstat;
unsigned nearest_rotate;
void* (*memRchr)(const void *, int, size_t);
char *shell;
smallint exitasap;
smallint rotateasap;
smallint reopenasap;
smallint linecomplete;
smallint tmaxflag;
char repl;
const char *replace;
int fl_flag_0;
unsigned dirn;
sigset_t blocked_sigset;
};
#define G (*ptr_to_globals)
#define dir (G.dir )
#define verbose (G.verbose )
#define linemax (G.linemax )
#define buflen (G.buflen )
#define linelen (G.linelen )
#define fndir (G.fndir )
#define fdwdir (G.fdwdir )
#define wstat (G.wstat )
#define memRchr (G.memRchr )
#define nearest_rotate (G.nearest_rotate)
#define exitasap (G.exitasap )
#define rotateasap (G.rotateasap )
#define reopenasap (G.reopenasap )
#define linecomplete (G.linecomplete )
#define tmaxflag (G.tmaxflag )
#define repl (G.repl )
#define replace (G.replace )
#define blocked_sigset (G.blocked_sigset)
#define fl_flag_0 (G.fl_flag_0 )
#define dirn (G.dirn )
#define line bb_common_bufsiz1
#define INIT_G() do { \
setup_common_bufsiz(); \
SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
linemax = 1000; \
/*buflen = 1024;*/ \
linecomplete = 1; \
replace = ""; \
} while (0)
#define FATAL "fatal: "
#define WARNING "warning: "
#define PAUSE "pausing: "
#define INFO "info: "
static void fatalx(const char *m0)
{
bb_error_msg_and_die(FATAL"%s", m0);
}
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static void warn(const char *m0)
{
bb_perror_msg(WARNING"%s", m0);
}
static void warn2(const char *m0, const char *m1)
{
bb_perror_msg(WARNING"%s: %s", m0, m1);
}
static void warnx(const char *m0, const char *m1)
{
bb_error_msg(WARNING"%s: %s", m0, m1);
}
static void pause_nomem(void)
{
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bb_error_msg(PAUSE"out of memory");
sleep(3);
}
static void pause1cannot(const char *m0)
{
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bb_perror_msg(PAUSE"can't %s", m0);
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sleep(3);
}
static void pause2cannot(const char *m0, const char *m1)
{
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bb_perror_msg(PAUSE"can't %s %s", m0, m1);
sleep(3);
}
static char* wstrdup(const char *str)
{
char *s;
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while (!(s = strdup(str)))
pause_nomem();
return s;
}
static unsigned pmatch(const char *p, const char *s, unsigned len)
{
for (;;) {
char c = *p++;
if (!c) return !len;
switch (c) {
case '*':
c = *p;
if (!c) return 1;
for (;;) {
if (!len) return 0;
if (*s == c) break;
++s;
--len;
}
continue;
case '+':
c = *p++;
if (c != *s) return 0;
for (;;) {
if (!len) return 1;
if (*s != c) break;
++s;
--len;
}
continue;
/*
case '?':
if (*p == '?') {
if (*s != '?') return 0;
++p;
}
++s; --len;
continue;
*/
default:
if (!len) return 0;
if (*s != c) return 0;
++s;
--len;
continue;
}
}
return 0;
}
/*** ex fmt_ptime.[ch] ***/
/* NUL terminated */
static void fmt_time_human_30nul(char *s, char dt_delim)
{
struct tm tm;
struct tm *ptm;
struct timeval tv;
gettimeofday(&tv, NULL);
ptm = gmtime_r(&tv.tv_sec, &tm);
/* ^^^ using gmtime_r() instead of gmtime() to not use static data */
sprintf(s, "%04u-%02u-%02u%c%02u:%02u:%02u.%06u000",
(unsigned)(1900 + ptm->tm_year),
(unsigned)(ptm->tm_mon + 1),
(unsigned)(ptm->tm_mday),
dt_delim,
(unsigned)(ptm->tm_hour),
(unsigned)(ptm->tm_min),
(unsigned)(ptm->tm_sec),
(unsigned)(tv.tv_usec)
);
/* 4+1 + 2+1 + 2+1 + 2+1 + 2+1 + 2+1 + 9 = */
/* 5 + 3 + 3 + 3 + 3 + 3 + 9 = */
/* 20 (up to '.' inclusive) + 9 (not including '\0') */
}
/* NOT terminated! */
static void fmt_time_bernstein_25(char *s)
{
uint32_t pack[3];
struct timeval tv;
unsigned sec_hi;
gettimeofday(&tv, NULL);
sec_hi = (0x400000000000000aULL + tv.tv_sec) >> 32;
tv.tv_sec = (time_t)(0x400000000000000aULL) + tv.tv_sec;
tv.tv_usec *= 1000;
/* Network order is big-endian: most significant byte first.
* This is exactly what we want here */
pack[0] = htonl(sec_hi);
pack[1] = htonl(tv.tv_sec);
pack[2] = htonl(tv.tv_usec);
*s++ = '@';
bin2hex(s, (char*)pack, 12);
}
static void processorstart(struct logdir *ld)
{
char sv_ch;
int pid;
if (!ld->processor) return;
if (ld->ppid) {
warnx("processor already running", ld->name);
return;
}
/* vfork'ed child trashes this byte, save... */
sv_ch = ld->fnsave[26];
if (!G.shell)
G.shell = xstrdup(get_shell_name());
while ((pid = vfork()) == -1)
pause2cannot("vfork for processor", ld->name);
if (!pid) {
int fd;
/* child */
/* Non-ignored signals revert to SIG_DFL on exec anyway */
/*bb_signals(0
+ (1 << SIGTERM)
+ (1 << SIGALRM)
+ (1 << SIGHUP)
, SIG_DFL);*/
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sig_unblock(SIGTERM);
sig_unblock(SIGALRM);
sig_unblock(SIGHUP);
if (verbose)
bb_error_msg(INFO"processing: %s/%s", ld->name, ld->fnsave);
fd = xopen(ld->fnsave, O_RDONLY|O_NDELAY);
xmove_fd(fd, 0);
ld->fnsave[26] = 't'; /* <- that's why we need sv_ch! */
fd = xopen(ld->fnsave, O_WRONLY|O_NDELAY|O_TRUNC|O_CREAT);
xmove_fd(fd, 1);
fd = open("state", O_RDONLY|O_NDELAY);
if (fd == -1) {
if (errno != ENOENT)
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bb_perror_msg_and_die(FATAL"can't %s processor %s", "open state for", ld->name);
close(xopen("state", O_WRONLY|O_NDELAY|O_TRUNC|O_CREAT));
fd = xopen("state", O_RDONLY|O_NDELAY);
}
xmove_fd(fd, 4);
fd = xopen("newstate", O_WRONLY|O_NDELAY|O_TRUNC|O_CREAT);
xmove_fd(fd, 5);
execl(G.shell, G.shell, "-c", ld->processor, (char*) NULL);
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bb_perror_msg_and_die(FATAL"can't %s processor %s", "run", ld->name);
}
ld->fnsave[26] = sv_ch; /* ...restore */
ld->ppid = pid;
}
static unsigned processorstop(struct logdir *ld)
{
char f[28];
if (ld->ppid) {
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sig_unblock(SIGHUP);
while (safe_waitpid(ld->ppid, &wstat, 0) == -1)
pause2cannot("wait for processor", ld->name);
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sig_block(SIGHUP);
ld->ppid = 0;
}
if (ld->fddir == -1)
return 1;
while (fchdir(ld->fddir) == -1)
pause2cannot("change directory, want processor", ld->name);
if (WEXITSTATUS(wstat) != 0) {
warnx("processor failed, restart", ld->name);
ld->fnsave[26] = 't';
unlink(ld->fnsave);
ld->fnsave[26] = 'u';
processorstart(ld);
while (fchdir(fdwdir) == -1)
pause1cannot("change to initial working directory");
return ld->processor ? 0 : 1;
}
ld->fnsave[26] = 't';
memcpy(f, ld->fnsave, 26);
f[26] = 's';
f[27] = '\0';
while (rename(ld->fnsave, f) == -1)
pause2cannot("rename processed", ld->name);
while (chmod(f, 0744) == -1)
pause2cannot("set mode of processed", ld->name);
ld->fnsave[26] = 'u';
if (unlink(ld->fnsave) == -1)
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bb_error_msg(WARNING"can't unlink: %s/%s", ld->name, ld->fnsave);
while (rename("newstate", "state") == -1)
pause2cannot("rename state", ld->name);
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if (verbose)
bb_error_msg(INFO"processed: %s/%s", ld->name, f);
while (fchdir(fdwdir) == -1)
pause1cannot("change to initial working directory");
return 1;
}
static void rmoldest(struct logdir *ld)
{
DIR *d;
struct dirent *f;
char oldest[FMT_PTIME];
int n = 0;
oldest[0] = 'A'; oldest[1] = oldest[27] = 0;
while (!(d = opendir(".")))
pause2cannot("open directory, want rotate", ld->name);
errno = 0;
while ((f = readdir(d))) {
if ((f->d_name[0] == '@') && (strlen(f->d_name) == 27)) {
if (f->d_name[26] == 't') {
if (unlink(f->d_name) == -1)
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warn2("can't unlink processor leftover", f->d_name);
} else {
++n;
if (strcmp(f->d_name, oldest) < 0)
memcpy(oldest, f->d_name, 27);
}
errno = 0;
}
}
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if (errno)
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warn2("can't read directory", ld->name);
closedir(d);
if (ld->nmax && (n > ld->nmax)) {
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if (verbose)
bb_error_msg(INFO"delete: %s/%s", ld->name, oldest);
if ((*oldest == '@') && (unlink(oldest) == -1))
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warn2("can't unlink oldest logfile", ld->name);
}
}
static unsigned rotate(struct logdir *ld)
{
struct stat st;
unsigned now;
if (ld->fddir == -1) {
ld->rotate_period = 0;
return 0;
}
if (ld->ppid)
while (!processorstop(ld))
continue;
while (fchdir(ld->fddir) == -1)
pause2cannot("change directory, want rotate", ld->name);
/* create new filename */
ld->fnsave[25] = '.';
ld->fnsave[26] = 's';
if (ld->processor)
ld->fnsave[26] = 'u';
ld->fnsave[27] = '\0';
do {
fmt_time_bernstein_25(ld->fnsave);
errno = 0;
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stat(ld->fnsave, &st);
} while (errno != ENOENT);
now = monotonic_sec();
if (ld->rotate_period && LESS(ld->next_rotate, now)) {
ld->next_rotate = now + ld->rotate_period;
if (LESS(ld->next_rotate, nearest_rotate))
nearest_rotate = ld->next_rotate;
}
if (ld->size > 0) {
while (fflush(ld->filecur) || fsync(ld->fdcur) == -1)
pause2cannot("fsync current logfile", ld->name);
while (fchmod(ld->fdcur, 0744) == -1)
pause2cannot("set mode of current", ld->name);
////close(ld->fdcur);
fclose(ld->filecur);
if (verbose) {
bb_error_msg(INFO"rename: %s/current %s %u", ld->name,
ld->fnsave, ld->size);
}
while (rename("current", ld->fnsave) == -1)
pause2cannot("rename current", ld->name);
while ((ld->fdcur = open("current", O_WRONLY|O_NDELAY|O_APPEND|O_CREAT, 0600)) == -1)
pause2cannot("create new current", ld->name);
while ((ld->filecur = fdopen(ld->fdcur, "a")) == NULL) ////
pause2cannot("create new current", ld->name); /* very unlikely */
setvbuf(ld->filecur, NULL, _IOFBF, linelen); ////
close_on_exec_on(ld->fdcur);
ld->size = 0;
while (fchmod(ld->fdcur, 0644) == -1)
pause2cannot("set mode of current", ld->name);
rmoldest(ld);
processorstart(ld);
}
while (fchdir(fdwdir) == -1)
pause1cannot("change to initial working directory");
return 1;
}
static int buffer_pwrite(int n, char *s, unsigned len)
{
int i;
struct logdir *ld = &dir[n];
if (ld->sizemax) {
if (ld->size >= ld->sizemax)
rotate(ld);
if (len > (ld->sizemax - ld->size))
len = ld->sizemax - ld->size;
}
while (1) {
////i = full_write(ld->fdcur, s, len);
////if (i != -1) break;
i = fwrite(s, 1, len, ld->filecur);
if (i == len) break;
if ((errno == ENOSPC) && (ld->nmin < ld->nmax)) {
DIR *d;
struct dirent *f;
char oldest[FMT_PTIME];
int j = 0;
while (fchdir(ld->fddir) == -1)
pause2cannot("change directory, want remove old logfile",
ld->name);
oldest[0] = 'A';
oldest[1] = oldest[27] = '\0';
while (!(d = opendir(".")))
pause2cannot("open directory, want remove old logfile",
ld->name);
errno = 0;
while ((f = readdir(d)))
if ((f->d_name[0] == '@') && (strlen(f->d_name) == 27)) {
++j;
if (strcmp(f->d_name, oldest) < 0)
memcpy(oldest, f->d_name, 27);
}
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if (errno) warn2("can't read directory, want remove old logfile",
ld->name);
closedir(d);
errno = ENOSPC;
if (j > ld->nmin) {
if (*oldest == '@') {
bb_error_msg(WARNING"out of disk space, delete: %s/%s",
ld->name, oldest);
errno = 0;
if (unlink(oldest) == -1) {
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warn2("can't unlink oldest logfile", ld->name);
errno = ENOSPC;
}
while (fchdir(fdwdir) == -1)
pause1cannot("change to initial working directory");
}
}
}
if (errno)
pause2cannot("write to current", ld->name);
}
ld->size += i;
if (ld->sizemax)
if (s[i-1] == '\n')
if (ld->size >= (ld->sizemax - linemax))
rotate(ld);
return i;
}
static void logdir_close(struct logdir *ld)
{
if (ld->fddir == -1)
return;
if (verbose)
bb_error_msg(INFO"close: %s", ld->name);
close(ld->fddir);
ld->fddir = -1;
if (ld->fdcur == -1)
return; /* impossible */
while (fflush(ld->filecur) || fsync(ld->fdcur) == -1)
pause2cannot("fsync current logfile", ld->name);
while (fchmod(ld->fdcur, 0744) == -1)
pause2cannot("set mode of current", ld->name);
////close(ld->fdcur);
fclose(ld->filecur);
ld->fdcur = -1;
if (ld->fdlock == -1)
return; /* impossible */
close(ld->fdlock);
ld->fdlock = -1;
free(ld->processor);
ld->processor = NULL;
}
static NOINLINE unsigned logdir_open(struct logdir *ld, const char *fn)
{
char buf[128];
unsigned now;
char *new, *s, *np;
int i;
struct stat st;
now = monotonic_sec();
ld->fddir = open(fn, O_RDONLY|O_NDELAY);
if (ld->fddir == -1) {
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warn2("can't open log directory", (char*)fn);
return 0;
}
close_on_exec_on(ld->fddir);
if (fchdir(ld->fddir) == -1) {
logdir_close(ld);
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warn2("can't change directory", (char*)fn);
return 0;
}
ld->fdlock = open("lock", O_WRONLY|O_NDELAY|O_APPEND|O_CREAT, 0600);
if ((ld->fdlock == -1)
|| (flock(ld->fdlock, LOCK_EX | LOCK_NB) == -1)
) {
logdir_close(ld);
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warn2("can't lock directory", (char*)fn);
while (fchdir(fdwdir) == -1)
pause1cannot("change to initial working directory");
return 0;
}
close_on_exec_on(ld->fdlock);
ld->size = 0;
ld->sizemax = 1000000;
ld->nmax = ld->nmin = 10;
ld->rotate_period = 0;
ld->name = (char*)fn;
ld->ppid = 0;
ld->match = '+';
free(ld->inst); ld->inst = NULL;
free(ld->processor); ld->processor = NULL;
/* read config */
i = open_read_close("config", buf, sizeof(buf) - 1);
if (i < 0 && errno != ENOENT)
bb_perror_msg(WARNING"%s/config", ld->name);
if (i > 0) {
buf[i] = '\0';
if (verbose)
bb_error_msg(INFO"read: %s/config", ld->name);
s = buf;
while (s) {
np = strchr(s, '\n');
if (np)
*np++ = '\0';
switch (s[0]) {
case '+':
case '-':
case 'e':
case 'E':
/* Filtering requires one-line buffering,
* resetting the "find newline" function
* accordingly */
memRchr = memchr;
/* Add '\n'-terminated line to ld->inst */
while (1) {
int l = asprintf(&new, "%s%s\n", ld->inst ? ld->inst : "", s);
if (l >= 0 && new)
break;
pause_nomem();
}
free(ld->inst);
ld->inst = new;
break;
case 's': {
ld->sizemax = xatou_sfx(&s[1], km_suffixes);
break;
}
case 'n':
ld->nmax = xatoi_positive(&s[1]);
break;
case 'N':
ld->nmin = xatoi_positive(&s[1]);
break;
case 't': {
static const struct suffix_mult mh_suffixes[] = {
{ "m", 60 },
{ "h", 60*60 },
/*{ "d", 24*60*60 },*/
{ "", 0 }
};
ld->rotate_period = xatou_sfx(&s[1], mh_suffixes);
if (ld->rotate_period) {
ld->next_rotate = now + ld->rotate_period;
if (!tmaxflag || LESS(ld->next_rotate, nearest_rotate))
nearest_rotate = ld->next_rotate;
tmaxflag = 1;
}
break;
}
case '!':
if (s[1]) {
free(ld->processor);
ld->processor = wstrdup(&s[1]);
}
break;
}
s = np;
}
/* Convert "aa\nbb\ncc\n\0" to "aa\0bb\0cc\0\0" */
s = ld->inst;
while (s) {
np = strchr(s, '\n');
if (np)
*np++ = '\0';
s = np;
}
}
/* open current */
i = stat("current", &st);
if (i != -1) {
if (st.st_size && !(st.st_mode & S_IXUSR)) {
ld->fnsave[25] = '.';
ld->fnsave[26] = 'u';
ld->fnsave[27] = '\0';
do {
fmt_time_bernstein_25(ld->fnsave);
errno = 0;
2007-01-28 03:51:52 +05:30
stat(ld->fnsave, &st);
} while (errno != ENOENT);
while (rename("current", ld->fnsave) == -1)
pause2cannot("rename current", ld->name);
rmoldest(ld);
i = -1;
} else {
/* st.st_size can be not just bigger, but WIDER!
* This code is safe: if st.st_size > 4GB, we select
* ld->sizemax (because it's "unsigned") */
ld->size = (st.st_size > ld->sizemax) ? ld->sizemax : st.st_size;
}
} else {
if (errno != ENOENT) {
logdir_close(ld);
2008-07-21 19:16:54 +05:30
warn2("can't stat current", ld->name);
while (fchdir(fdwdir) == -1)
pause1cannot("change to initial working directory");
return 0;
}
}
while ((ld->fdcur = open("current", O_WRONLY|O_NDELAY|O_APPEND|O_CREAT, 0600)) == -1)
pause2cannot("open current", ld->name);
while ((ld->filecur = fdopen(ld->fdcur, "a")) == NULL)
pause2cannot("open current", ld->name); ////
setvbuf(ld->filecur, NULL, _IOFBF, linelen); ////
close_on_exec_on(ld->fdcur);
while (fchmod(ld->fdcur, 0644) == -1)
pause2cannot("set mode of current", ld->name);
if (verbose) {
if (i == 0) bb_error_msg(INFO"append: %s/current", ld->name);
else bb_error_msg(INFO"new: %s/current", ld->name);
}
while (fchdir(fdwdir) == -1)
pause1cannot("change to initial working directory");
return 1;
}
static void logdirs_reopen(void)
{
int l;
int ok = 0;
tmaxflag = 0;
for (l = 0; l < dirn; ++l) {
logdir_close(&dir[l]);
if (logdir_open(&dir[l], fndir[l]))
ok = 1;
}
if (!ok)
fatalx("no functional log directories");
}
/* Will look good in libbb one day */
static ssize_t ndelay_read(int fd, void *buf, size_t count)
{
if (!(fl_flag_0 & O_NONBLOCK))
fcntl(fd, F_SETFL, fl_flag_0 | O_NONBLOCK);
count = safe_read(fd, buf, count);
if (!(fl_flag_0 & O_NONBLOCK))
fcntl(fd, F_SETFL, fl_flag_0);
return count;
}
/* Used for reading stdin */
static int buffer_pread(/*int fd, */char *s, unsigned len)
{
unsigned now;
struct pollfd input;
int i;
input.fd = STDIN_FILENO;
input.events = POLLIN;
do {
if (rotateasap) {
for (i = 0; i < dirn; ++i)
rotate(dir + i);
rotateasap = 0;
}
if (exitasap) {
if (linecomplete)
return 0;
len = 1;
}
if (reopenasap) {
logdirs_reopen();
reopenasap = 0;
}
now = monotonic_sec();
nearest_rotate = now + (45 * 60 + 45);
for (i = 0; i < dirn; ++i) {
if (dir[i].rotate_period) {
if (LESS(dir[i].next_rotate, now))
rotate(dir + i);
if (LESS(dir[i].next_rotate, nearest_rotate))
nearest_rotate = dir[i].next_rotate;
}
}
sigprocmask(SIG_UNBLOCK, &blocked_sigset, NULL);
i = nearest_rotate - now;
if (i > 1000000)
i = 1000000;
if (i <= 0)
i = 1;
poll(&input, 1, i * 1000);
sigprocmask(SIG_BLOCK, &blocked_sigset, NULL);
i = ndelay_read(STDIN_FILENO, s, len);
if (i >= 0)
break;
if (errno == EINTR)
continue;
if (errno != EAGAIN) {
2008-07-21 19:16:54 +05:30
warn("can't read standard input");
break;
}
/* else: EAGAIN - normal, repeat silently */
} while (!exitasap);
if (i > 0) {
int cnt;
linecomplete = (s[i-1] == '\n');
if (!repl)
return i;
cnt = i;
while (--cnt >= 0) {
char ch = *s;
if (ch != '\n') {
if (ch < 32 || ch > 126)
*s = repl;
else {
int j;
for (j = 0; replace[j]; ++j) {
if (ch == replace[j]) {
*s = repl;
break;
}
}
}
}
s++;
}
}
return i;
}
2008-07-05 14:48:54 +05:30
static void sig_term_handler(int sig_no UNUSED_PARAM)
{
if (verbose)
bb_error_msg(INFO"sig%s received", "term");
exitasap = 1;
}
2008-07-05 14:48:54 +05:30
static void sig_child_handler(int sig_no UNUSED_PARAM)
{
pid_t pid;
int l;
if (verbose)
bb_error_msg(INFO"sig%s received", "child");
while ((pid = wait_any_nohang(&wstat)) > 0) {
for (l = 0; l < dirn; ++l) {
if (dir[l].ppid == pid) {
dir[l].ppid = 0;
processorstop(&dir[l]);
break;
}
}
}
}
2008-07-05 14:48:54 +05:30
static void sig_alarm_handler(int sig_no UNUSED_PARAM)
{
if (verbose)
bb_error_msg(INFO"sig%s received", "alarm");
rotateasap = 1;
}
2008-07-05 14:48:54 +05:30
static void sig_hangup_handler(int sig_no UNUSED_PARAM)
{
if (verbose)
bb_error_msg(INFO"sig%s received", "hangup");
reopenasap = 1;
}
static void logmatch(struct logdir *ld)
{
char *s;
ld->match = '+';
ld->matcherr = 'E';
s = ld->inst;
while (s && s[0]) {
switch (s[0]) {
case '+':
case '-':
if (pmatch(s+1, line, linelen))
ld->match = s[0];
break;
case 'e':
case 'E':
if (pmatch(s+1, line, linelen))
ld->matcherr = s[0];
break;
}
s += strlen(s) + 1;
}
}
int svlogd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int svlogd_main(int argc, char **argv)
{
char *r, *l, *b;
ssize_t stdin_cnt = 0;
int i;
unsigned opt;
unsigned timestamp = 0;
INIT_G();
getopt32: remove opt_complementary function old new delta vgetopt32 1318 1392 +74 runsvdir_main 703 713 +10 bb_make_directory 423 425 +2 collect_cpu 546 545 -1 opt_chars 3 - -3 opt_complementary 4 - -4 tftpd_main 567 562 -5 ntp_init 476 471 -5 zcip_main 1266 1256 -10 xxd_main 428 418 -10 whois_main 140 130 -10 who_main 463 453 -10 which_main 212 202 -10 wget_main 2535 2525 -10 watchdog_main 291 281 -10 watch_main 222 212 -10 vlock_main 399 389 -10 uuencode_main 332 322 -10 uudecode_main 316 306 -10 unlink_main 45 35 -10 udhcpd_main 1482 1472 -10 udhcpc_main 2762 2752 -10 tune2fs_main 290 280 -10 tunctl_main 366 356 -10 truncate_main 218 208 -10 tr_main 518 508 -10 time_main 1134 1124 -10 tftp_main 286 276 -10 telnetd_main 1873 1863 -10 tcpudpsvd_main 1785 1775 -10 taskset_main 521 511 -10 tar_main 1009 999 -10 tail_main 1644 1634 -10 syslogd_main 1967 1957 -10 switch_root_main 368 358 -10 svlogd_main 1454 1444 -10 sv 1296 1286 -10 stat_main 104 94 -10 start_stop_daemon_main 1028 1018 -10 split_main 542 532 -10 sort_main 796 786 -10 slattach_main 624 614 -10 shuf_main 504 494 -10 setsid_main 96 86 -10 setserial_main 1132 1122 -10 setfont_main 388 378 -10 setconsole_main 78 68 -10 sendmail_main 1209 1199 -10 sed_main 677 667 -10 script_main 1077 1067 -10 run_parts_main 325 315 -10 rtcwake_main 454 444 -10 rm_main 175 165 -10 reformime_main 119 109 -10 readlink_main 123 113 -10 rdate_main 246 236 -10 pwdx_main 189 179 -10 pstree_main 317 307 -10 pscan_main 663 653 -10 popmaildir_main 818 808 -10 pmap_main 80 70 -10 nc_main 1042 1032 -10 mv_main 558 548 -10 mountpoint_main 477 467 -10 mount_main 1264 1254 -10 modprobe_main 768 758 -10 modinfo_main 333 323 -10 mktemp_main 200 190 -10 mkswap_main 324 314 -10 mkfs_vfat_main 1489 1479 -10 microcom_main 715 705 -10 md5_sha1_sum_main 521 511 -10 man_main 867 857 -10 makedevs_main 1052 1042 -10 ls_main 563 553 -10 losetup_main 432 422 -10 loadfont_main 89 79 -10 ln_main 524 514 -10 link_main 75 65 -10 ipcalc_main 544 534 -10 iostat_main 2397 2387 -10 install_main 768 758 -10 id_main 480 470 -10 i2cset_main 1239 1229 -10 i2cget_main 380 370 -10 i2cdump_main 1482 1472 -10 i2cdetect_main 682 672 -10 hwclock_main 406 396 -10 httpd_main 741 731 -10 grep_main 837 827 -10 getty_main 1559 1549 -10 fuser_main 297 287 -10 ftpgetput_main 345 335 -10 ftpd_main 2232 2222 -10 fstrim_main 251 241 -10 fsfreeze_main 77 67 -10 fsck_minix_main 2921 2911 -10 flock_main 314 304 -10 flashcp_main 740 730 -10 flash_eraseall_main 833 823 -10 fdformat_main 532 522 -10 expand_main 680 670 -10 eject_main 335 325 -10 dumpleases_main 630 620 -10 du_main 314 304 -10 dos2unix_main 441 431 -10 diff_main 1350 1340 -10 df_main 1064 1054 -10 date_main 1095 1085 -10 cut_main 961 951 -10 cryptpw_main 228 218 -10 crontab_main 575 565 -10 crond_main 1149 1139 -10 cp_main 370 360 -10 common_traceroute_main 3834 3824 -10 common_ping_main 1767 1757 -10 comm_main 239 229 -10 cmp_main 655 645 -10 chrt_main 379 369 -10 chpst_main 704 694 -10 chpasswd_main 308 298 -10 chown_main 171 161 -10 chmod_main 158 148 -10 cat_main 428 418 -10 bzip2_main 120 110 -10 blkdiscard_main 264 254 -10 base64_main 221 211 -10 arping_main 1665 1655 -10 ar_main 556 546 -10 adjtimex_main 406 396 -10 adduser_main 882 872 -10 addgroup_main 411 401 -10 acpid_main 1198 1188 -10 optstring 11 - -11 opt_string 18 - -18 OPT_STR 25 - -25 ubi_tools_main 1288 1258 -30 ls_options 31 - -31 ------------------------------------------------------------------------------ (add/remove: 0/6 grow/shrink: 3/129 up/down: 86/-1383) Total: -1297 bytes text data bss dec hex filename 915428 485 6876 922789 e14a5 busybox_old 914629 485 6872 921986 e1182 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-09 01:25:02 +05:30
opt = getopt32(argv, "^"
"r:R:l:b:tv" "\0" "tt:vv",
&r, &replace, &l, &b, &timestamp, &verbose
);
if (opt & 1) { // -r
repl = r[0];
if (!repl || r[1])
bb_show_usage();
}
if (opt & 2) if (!repl) repl = '_'; // -R
if (opt & 4) { // -l
linemax = xatou_range(l, 0, COMMON_BUFSIZE-26);
if (linemax == 0)
linemax = COMMON_BUFSIZE-26;
if (linemax < 256)
linemax = 256;
}
////if (opt & 8) { // -b
//// buflen = xatoi_positive(b);
//// if (buflen == 0) buflen = 1024;
////}
//if (opt & 0x10) timestamp++; // -t
//if (opt & 0x20) verbose++; // -v
//if (timestamp > 2) timestamp = 2;
argv += optind;
argc -= optind;
dirn = argc;
if (dirn <= 0)
bb_show_usage();
////if (buflen <= linemax) bb_show_usage();
fdwdir = xopen(".", O_RDONLY|O_NDELAY);
close_on_exec_on(fdwdir);
dir = xzalloc(dirn * sizeof(dir[0]));
for (i = 0; i < dirn; ++i) {
dir[i].fddir = -1;
dir[i].fdcur = -1;
////dir[i].btmp = xmalloc(buflen);
/*dir[i].ppid = 0;*/
}
/* line = xmalloc(linemax + (timestamp ? 26 : 0)); */
fndir = argv;
/* We cannot set NONBLOCK on fd #0 permanently - this setting
* _isn't_ per-process! It is shared among all other processes
* with the same stdin */
fl_flag_0 = fcntl(0, F_GETFL);
sigemptyset(&blocked_sigset);
sigaddset(&blocked_sigset, SIGTERM);
sigaddset(&blocked_sigset, SIGCHLD);
sigaddset(&blocked_sigset, SIGALRM);
sigaddset(&blocked_sigset, SIGHUP);
sigprocmask(SIG_BLOCK, &blocked_sigset, NULL);
bb_signals_recursive_norestart(1 << SIGTERM, sig_term_handler);
bb_signals_recursive_norestart(1 << SIGCHLD, sig_child_handler);
bb_signals_recursive_norestart(1 << SIGALRM, sig_alarm_handler);
bb_signals_recursive_norestart(1 << SIGHUP, sig_hangup_handler);
2007-01-28 04:45:50 +05:30
/* Without timestamps, we don't have to print each line
* separately, so we can look for _last_ newline, not first,
* thus batching writes. If filtering is enabled in config,
* logdirs_reopen resets it to memchr.
*/
memRchr = (timestamp ? memchr : memrchr);
logdirs_reopen();
2007-01-28 04:45:50 +05:30
setvbuf(stderr, NULL, _IOFBF, linelen);
2007-01-28 20:21:32 +05:30
/* Each iteration processes one or more lines */
while (1) {
char stamp[FMT_PTIME];
char *lineptr;
char *printptr;
char *np;
int printlen;
char ch;
lineptr = line;
if (timestamp)
lineptr += 26;
/* lineptr[0..linemax-1] - buffer for stdin */
/* (possibly has some unprocessed data from prev loop) */
/* Refill the buffer if needed */
2007-01-28 04:45:50 +05:30
np = memRchr(lineptr, '\n', stdin_cnt);
if (!np && !exitasap) {
i = linemax - stdin_cnt; /* avail. bytes at tail */
if (i >= 128) {
i = buffer_pread(/*0, */lineptr + stdin_cnt, i);
2007-01-28 04:45:50 +05:30
if (i <= 0) /* EOF or error on stdin */
exitasap = 1;
else {
np = memRchr(lineptr + stdin_cnt, '\n', i);
stdin_cnt += i;
}
}
}
if (stdin_cnt <= 0 && exitasap)
break;
/* Search for '\n' (in fact, np already holds the result) */
linelen = stdin_cnt;
if (np) {
print_to_nl:
/* NB: starting from here lineptr may point
* farther out into line[] */
linelen = np - lineptr + 1;
}
/* linelen == no of chars incl. '\n' (or == stdin_cnt) */
ch = lineptr[linelen-1];
/* Biggest performance hit was coming from the fact
* that we did not buffer writes. We were reading many lines
* in one read() above, but wrote one line per write().
* We are using stdio to fix that */
/* write out lineptr[0..linelen-1] to each log destination
* (or lineptr[-26..linelen-1] if timestamping) */
printlen = linelen;
printptr = lineptr;
if (timestamp) {
if (timestamp == 1)
fmt_time_bernstein_25(stamp);
else /* 2+: */
fmt_time_human_30nul(stamp, timestamp == 2 ? '_' : 'T');
printlen += 26;
printptr -= 26;
memcpy(printptr, stamp, 25);
printptr[25] = ' ';
}
for (i = 0; i < dirn; ++i) {
struct logdir *ld = &dir[i];
if (ld->fddir == -1)
continue;
if (ld->inst)
logmatch(ld);
if (ld->matcherr == 'e') {
/* runit-1.8.0 compat: if timestamping, do it on stderr too */
////full_write(STDERR_FILENO, printptr, printlen);
fwrite(printptr, 1, printlen, stderr);
}
if (ld->match != '+')
continue;
buffer_pwrite(i, printptr, printlen);
}
/* If we didn't see '\n' (long input line), */
/* read/write repeatedly until we see it */
while (ch != '\n') {
/* lineptr is emptied now, safe to use as buffer */
stdin_cnt = exitasap ? -1 : buffer_pread(/*0, */lineptr, linemax);
if (stdin_cnt <= 0) { /* EOF or error on stdin */
exitasap = 1;
lineptr[0] = ch = '\n';
linelen = 1;
stdin_cnt = 1;
} else {
linelen = stdin_cnt;
2007-01-28 04:45:50 +05:30
np = memRchr(lineptr, '\n', stdin_cnt);
if (np)
linelen = np - lineptr + 1;
ch = lineptr[linelen-1];
}
/* linelen == no of chars incl. '\n' (or == stdin_cnt) */
for (i = 0; i < dirn; ++i) {
if (dir[i].fddir == -1)
continue;
if (dir[i].matcherr == 'e') {
////full_write(STDERR_FILENO, lineptr, linelen);
fwrite(lineptr, 1, linelen, stderr);
}
if (dir[i].match != '+')
continue;
buffer_pwrite(i, lineptr, linelen);
}
}
stdin_cnt -= linelen;
if (stdin_cnt > 0) {
lineptr += linelen;
/* If we see another '\n', we don't need to read
* next piece of input: can print what we have */
2007-01-28 04:45:50 +05:30
np = memRchr(lineptr, '\n', stdin_cnt);
if (np)
goto print_to_nl;
/* Move unprocessed data to the front of line */
memmove((timestamp ? line+26 : line), lineptr, stdin_cnt);
}
fflush_all();////
}
for (i = 0; i < dirn; ++i) {
if (dir[i].ppid)
while (!processorstop(&dir[i]))
continue;
logdir_close(&dir[i]);
}
2007-01-28 04:45:50 +05:30
return 0;
}