mirror of
https://github.com/topjohnwu/ndk-busybox.git
synced 2024-12-05 18:36:37 +00:00
6ba1a80c26
Patch by Larry Doolittle <ldoolitt@recycle.lbl.gov>.
154 lines
3.7 KiB
C
154 lines
3.7 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* Mini klogd implementation for busybox
|
|
*
|
|
* Copyright (C) 2001 by Gennady Feldman <gfeldman@cachier.com>.
|
|
* Changes: Made this a standalone busybox module which uses standalone
|
|
* syslog() client interface.
|
|
*
|
|
* Copyright (C) 1999,2000,2001 by Lineo, inc.
|
|
* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
|
|
*
|
|
* Copyright (C) 2000 by Karl M. Hegbloom <karlheg@debian.org>
|
|
*
|
|
* "circular buffer" Copyright (C) 2000 by Gennady Feldman <gfeldman@mail.com>
|
|
*
|
|
* Maintainer: Gennady Feldman <gena01@cachier.com> as of Mar 12, 2001
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <signal.h> /* for our signal() handlers */
|
|
#include <string.h> /* strncpy() */
|
|
#include <errno.h> /* errno and friends */
|
|
#include <unistd.h>
|
|
#include <ctype.h>
|
|
#include <sys/syslog.h>
|
|
|
|
#if __GNU_LIBRARY__ < 5
|
|
# ifdef __alpha__
|
|
# define klogctl syslog
|
|
# endif
|
|
#else
|
|
# include <sys/klog.h>
|
|
#endif
|
|
|
|
#include "busybox.h"
|
|
|
|
static void klogd_signal(int sig)
|
|
{
|
|
klogctl(7, NULL, 0);
|
|
klogctl(0, 0, 0);
|
|
//logMessage(0, "Kernel log daemon exiting.");
|
|
syslog_msg(LOG_DAEMON, 0, "Kernel log daemon exiting.");
|
|
exit(TRUE);
|
|
}
|
|
|
|
static void doKlogd (void) __attribute__ ((noreturn));
|
|
static void doKlogd (void)
|
|
{
|
|
int priority = LOG_INFO;
|
|
char log_buffer[4096];
|
|
int i, n, lastc;
|
|
char *start;
|
|
|
|
/* Set up sig handlers */
|
|
signal(SIGINT, klogd_signal);
|
|
signal(SIGKILL, klogd_signal);
|
|
signal(SIGTERM, klogd_signal);
|
|
signal(SIGHUP, SIG_IGN);
|
|
|
|
/* "Open the log. Currently a NOP." */
|
|
klogctl(1, NULL, 0);
|
|
|
|
syslog_msg(LOG_DAEMON, 0, "klogd started: " BB_BANNER);
|
|
|
|
while (1) {
|
|
/* Use kernel syscalls */
|
|
memset(log_buffer, '\0', sizeof(log_buffer));
|
|
n = klogctl(2, log_buffer, sizeof(log_buffer));
|
|
if (n < 0) {
|
|
char message[80];
|
|
|
|
if (errno == EINTR)
|
|
continue;
|
|
snprintf(message, 79, "klogd: Error return from sys_sycall: %d - %s.\n",
|
|
errno, strerror(errno));
|
|
syslog_msg(LOG_DAEMON, LOG_SYSLOG | LOG_ERR, message);
|
|
exit(1);
|
|
}
|
|
|
|
/* klogctl buffer parsing modelled after code in dmesg.c */
|
|
start=&log_buffer[0];
|
|
lastc='\0';
|
|
for (i=0; i<n; i++) {
|
|
if (lastc == '\0' && log_buffer[i] == '<') {
|
|
priority = 0;
|
|
i++;
|
|
while (isdigit(log_buffer[i])) {
|
|
priority = priority*10+(log_buffer[i]-'0');
|
|
i++;
|
|
}
|
|
if (log_buffer[i] == '>') i++;
|
|
start = &log_buffer[i];
|
|
}
|
|
if (log_buffer[i] == '\n') {
|
|
log_buffer[i] = '\0'; /* zero terminate this message */
|
|
syslog_msg(LOG_DAEMON, LOG_KERN | priority, start);
|
|
start = &log_buffer[i+1];
|
|
priority = LOG_INFO;
|
|
}
|
|
lastc = log_buffer[i];
|
|
}
|
|
}
|
|
}
|
|
|
|
extern int klogd_main(int argc, char **argv)
|
|
{
|
|
/* no options, no getopt */
|
|
int opt;
|
|
int doFork = TRUE;
|
|
|
|
/* do normal option parsing */
|
|
while ((opt = getopt(argc, argv, "n")) > 0) {
|
|
switch (opt) {
|
|
case 'n':
|
|
doFork = FALSE;
|
|
break;
|
|
default:
|
|
show_usage();
|
|
}
|
|
}
|
|
|
|
if (doFork == TRUE) {
|
|
if (daemon(0, 1) < 0)
|
|
perror_msg_and_die("daemon");
|
|
}
|
|
doKlogd();
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
Local Variables
|
|
c-file-style: "linux"
|
|
c-basic-offset: 4
|
|
tab-width: 4
|
|
End:
|
|
*/
|