mirror of
https://github.com/samba-team/samba.git
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b62b7fcde8
(This used to be ctdb commit 1306b04cd01e996fd1aa1159a9521f2ff7b06165)
175 lines
3.9 KiB
C
175 lines
3.9 KiB
C
/*
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ctdb logging code
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Copyright (C) Andrew Tridgell 2008
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "lib/events/events.h"
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#include "../include/ctdb_private.h"
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#include "system/syslog.h"
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#include "system/time.h"
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#include "system/filesys.h"
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struct ctdb_log_state {
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char *logfile;
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int fd, pfd;
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char buf[1024];
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uint16_t buf_used;
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bool use_syslog;
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};
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/* we need this global to eep the DEBUG() syntax */
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static struct ctdb_log_state *log_state;
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/*
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syslog logging function
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*/
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static void ctdb_syslog_log(const char *format, va_list ap)
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{
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vsyslog(LOG_NOTICE, format, ap);
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}
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/*
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log file logging function
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*/
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static void ctdb_logfile_log(const char *format, va_list ap)
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{
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struct timeval t;
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char *s = NULL;
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struct tm *tm;
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char tbuf[100];
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vasprintf(&s, format, ap);
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t = timeval_current();
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tm = localtime(&t.tv_sec);
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strftime(tbuf,sizeof(tbuf)-1,"%Y/%m/%d %H:%M:%S", tm);
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dprintf(log_state->fd, "%s.%06u [%5u]: %s",
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tbuf, (unsigned)t.tv_usec, (unsigned)getpid(), s);
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free(s);
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}
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/*
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choose the logfile location
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*/
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int ctdb_set_logfile(struct ctdb_context *ctdb, const char *logfile, bool use_syslog)
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{
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ctdb->log = talloc_zero(ctdb, struct ctdb_log_state);
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log_state = ctdb->log;
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if (use_syslog) {
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do_debug_v = ctdb_syslog_log;
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ctdb->log->use_syslog = true;
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} else if (logfile == NULL || strcmp(logfile, "-") == 0) {
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do_debug_v = ctdb_logfile_log;
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ctdb->log->fd = 1;
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/* also catch stderr of subcommands to stdout */
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dup2(1, 2);
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} else {
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do_debug_v = ctdb_logfile_log;
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ctdb->log->logfile = talloc_strdup(ctdb, logfile);
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ctdb->log->fd = open(logfile, O_WRONLY|O_APPEND|O_CREAT, 0666);
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if (ctdb->log->fd == -1) {
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printf("Failed to open logfile %s\n", ctdb->logfile);
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abort();
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}
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}
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return 0;
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}
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/*
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called when log data comes in from a child process
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*/
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static void ctdb_log_handler(struct event_context *ev, struct fd_event *fde,
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uint16_t flags, void *private)
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{
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struct ctdb_context *ctdb = talloc_get_type(private, struct ctdb_context);
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ssize_t n;
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char *p;
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if (!(flags & EVENT_FD_READ)) {
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return;
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}
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n = read(ctdb->log->pfd, &ctdb->log->buf[ctdb->log->buf_used],
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sizeof(ctdb->log->buf) - ctdb->log->buf_used);
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if (n > 0) {
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ctdb->log->buf_used += n;
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}
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if (ctdb->log->buf_used == sizeof(ctdb->log->buf)) {
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do_debug("%*.*s\n", ctdb->log->buf_used, ctdb->log->buf_used, ctdb->log->buf);
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ctdb->log->buf_used = 0;
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return;
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}
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p = memchr(ctdb->log->buf, '\n', ctdb->log->buf_used);
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if (!p) {
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return;
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}
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n = (p - ctdb->log->buf)+1;
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do_debug("%*.*s", n, n, ctdb->log->buf);
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memmove(ctdb->log->buf, ctdb->log->buf+n, sizeof(ctdb->log->buf) - n);
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ctdb->log->buf_used -= n;
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}
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/*
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setup for logging of child process stdout
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*/
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int ctdb_set_child_logging(struct ctdb_context *ctdb)
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{
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int p[2];
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if (ctdb->log->fd == 1) {
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/* not needed for stdout logging */
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return 0;
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}
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/* setup a pipe to catch IO from subprocesses */
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if (pipe(p) != 0) {
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DEBUG(0,(__location__ " Failed to setup for child logging pipe\n"));
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return -1;
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}
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event_add_fd(ctdb->ev, ctdb, p[0], EVENT_FD_READ,
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ctdb_log_handler, ctdb);
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set_close_on_exec(p[0]);
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ctdb->log->pfd = p[0];
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close(1);
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close(2);
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if (p[1] != 1) {
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dup2(p[1], 1);
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close(p[1]);
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}
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/* also catch stderr of subcommands to the log */
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dup2(1, 2);
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return 0;
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}
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