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/* -*- c-file-style: "java"; indent-tabs-mode: nil; tab-width: 4; fill-column: 78 -*-
*
* distcc -- A simple distributed compiler system
*
* Copyright (C) 2002, 2003 by Martin Pool <mbp@samba.org>
* Copyright 2007 Google Inc.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include "distcc.h"
#include "trace.h"
#include "exitcode.h"
#include "util.h"
/**
* Setup client error/trace output.
*
* Trace goes to the file specified by DISTCC_LOG, if any. Otherwise, it goes
* to stderr, except that UNCACHED_ERR_FD can redirect it elsewhere, for use
* under ccache.
*
* The exact setting of log level is a little strange, but for a good
* reason: if you ask for verbose, you get everything. Otherwise, if
* you set a file, you get INFO and above. Otherwise, you only get
* WARNING messages. In practice this seems to be a nice balance.
**/
void dcc_set_trace_from_env(void)
{
const char *logfile, *logfd_name;
int fd;
int failed_to_open_logfile = 0;
int save_errno = 0;
int level = RS_LOG_WARNING; /* by default, warnings only */
/* let the decision on what to log rest on the loggers */
/* the email-an-error functionality in emaillog.c depends on this */
rs_trace_set_level(RS_LOG_DEBUG);
if ((logfile = getenv("DISTCC_LOG")) && logfile[0]) {
fd = open(logfile, O_WRONLY|O_APPEND|O_CREAT, 0666);
if (fd != -1) {
/* asked for a file, and we can open that file:
include info messages */
level = RS_LOG_INFO;
} else {
/* asked for a file, can't use it; use stderr instead */
fd = STDERR_FILENO;
save_errno = errno;
failed_to_open_logfile = 1;
}
} else {
/* not asked for file */
if ((logfd_name = getenv("UNCACHED_ERR_FD")) == NULL ||
(fd = atoi(logfd_name)) == 0) {
fd = STDERR_FILENO;
}
}
if (dcc_getenv_bool("DISTCC_VERBOSE", 0)) {
level = RS_LOG_DEBUG;
}
rs_add_logger(rs_logger_file, level, NULL, fd);
if (failed_to_open_logfile) {
rs_log_error("failed to open logfile %s: %s",
logfile, strerror(save_errno));
}
}
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