X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=sysklogd%2Fklogd.c;h=6a675b8b3fdb5faa5c18e7896de2a26344420652;hb=d553faf5a53cf9d72e16fc789451a92a797f1b70;hp=f537a4bb8184e23aa4b9343848dc0507031f9eeb;hpb=85e5e72bc1acd9d58c11bde6e14c8270cd9f169f;p=oweals%2Fbusybox.git diff --git a/sysklogd/klogd.c b/sysklogd/klogd.c index f537a4bb8..6a675b8b3 100644 --- a/sysklogd/klogd.c +++ b/sysklogd/klogd.c @@ -4,9 +4,9 @@ * * Copyright (C) 2001 by Gennady Feldman . * Changes: Made this a standalone busybox module which uses standalone - * syslog() client interface. + * syslog() client interface. * - * Copyright (C) 1999-2003 by Erik Andersen + * Copyright (C) 1999-2004 by Erik Andersen * * Copyright (C) 2000 by Karl M. Hegbloom * @@ -14,155 +14,108 @@ * * Maintainer: Gennady Feldman 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 - * + * Licensed under the GPL v2 or later, see the file LICENSE in this tarball. */ -#include -#include -#include /* for our signal() handlers */ -#include /* strncpy() */ -#include /* errno and friends */ -#include -#include -#include +#include "libbb.h" +#include #include -#include "busybox.h" - -static void klogd_signal(int sig) +static void klogd_signal(int sig ATTRIBUTE_UNUSED) { klogctl(7, NULL, 0); - klogctl(0, 0, 0); - /* logMessage(0, "Kernel log daemon exiting."); */ - syslog_msg(LOG_SYSLOG, LOG_NOTICE, "Kernel log daemon exiting."); - exit(TRUE); + klogctl(0, NULL, 0); + syslog(LOG_NOTICE, "klogd: exiting"); + exit(EXIT_SUCCESS); } -static void doKlogd(const char console_log_level) __attribute__ ((noreturn)); -static void doKlogd(const char console_log_level) +#define log_buffer bb_common_bufsiz1 +enum { + KLOGD_LOGBUF_SIZE = sizeof(log_buffer), + OPT_LEVEL = (1 << 0), + OPT_FOREGROUND = (1 << 1), +}; + +int klogd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int klogd_main(int argc, char **argv) { - int priority = LOG_INFO; - char log_buffer[4096]; - int i, n, lastc; + int i = i; /* silence gcc */ char *start; + /* do normal option parsing */ + getopt32(argv, "c:n", &start); + + if (option_mask32 & OPT_LEVEL) { + /* Valid levels are between 1 and 8 */ + i = xatoul_range(start, 1, 8); + } + + if (!(option_mask32 & OPT_FOREGROUND)) { + bb_daemonize_or_rexec(DAEMON_CHDIR_ROOT, argv); + } + + openlog("kernel", 0, LOG_KERN); + /* Set up sig handlers */ - signal(SIGINT, klogd_signal); - signal(SIGKILL, klogd_signal); - signal(SIGTERM, klogd_signal); + bb_signals(0 + + (1 << SIGINT) + + (1 << SIGTERM) + , klogd_signal); signal(SIGHUP, SIG_IGN); /* "Open the log. Currently a NOP." */ klogctl(1, NULL, 0); - /* Set level of kernel console messaging.. */ - if (console_log_level) - klogctl(8, NULL, console_log_level); + /* Set level of kernel console messaging. */ + if (option_mask32 & OPT_LEVEL) + klogctl(8, NULL, i); - syslog_msg(LOG_SYSLOG, LOG_NOTICE, "klogd started: " BB_BANNER); + syslog(LOG_NOTICE, "klogd started: %s", bb_banner); + /* Note: this code does not detect incomplete messages + * (messages not ending with '\n' or just when kernel + * generates too many messages for us to keep up) + * and will split them in two separate lines */ 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]; + int n; + int priority; + n = klogctl(2, log_buffer, KLOGD_LOGBUF_SIZE - 1); + if (n < 0) { if (errno == EINTR) continue; - snprintf(message, 79, - "klogd: Error return from sys_sycall: %d - %s.\n", errno, - strerror(errno)); - syslog_msg(LOG_SYSLOG, LOG_ERR, message); - exit(1); + syslog(LOG_ERR, "klogd: error from klogctl(2): %d - %m", + errno); + break; } - - /* 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; + log_buffer[n] = '\n'; + i = 0; + while (i < n) { + priority = LOG_INFO; + start = &log_buffer[i]; + if (log_buffer[i] == '<') { i++; - while (isdigit(log_buffer[i])) { - priority = priority * 10 + (log_buffer[i] - '0'); + // kernel never ganerates multi-digit prios + //priority = 0; + //while (log_buffer[i] >= '0' && log_buffer[i] <= '9') { + // priority = priority * 10 + (log_buffer[i] - '0'); + // i++; + //} + if (isdigit(log_buffer[i])) { + priority = (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_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; - unsigned char console_log_level = 7; - - /* do normal option parsing */ - while ((opt = getopt(argc, argv, "c:n")) > 0) { - switch (opt) { - case 'c': - if ((optarg == NULL) || (optarg[1] != '\0')) { - bb_show_usage(); - } - /* Valid levels are between 1 and 8 */ - console_log_level = *optarg - '1'; - if (console_log_level > 7) { - bb_show_usage(); - } - console_log_level++; - - break; - case 'n': - doFork = FALSE; - break; - default: - bb_show_usage(); + while (log_buffer[i] != '\n') + i++; + log_buffer[i] = '\0'; + syslog(priority, "%s", start); + i++; } } - if (doFork) { -#if !defined(__UCLIBC__) || defined(__UCLIBC_HAS_MMU__) - if (daemon(0, 1) < 0) - bb_perror_msg_and_die("daemon"); -#else - bb_error_msg_and_die("daemon not supported"); -#endif - } - doKlogd(console_log_level); - - return EXIT_SUCCESS; + return EXIT_FAILURE; } - -/* -Local Variables -c-file-style: "linux" -c-basic-offset: 4 -tab-width: 4 -End: -*/