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/* -*- c-file-style: "java"; indent-tabs-mode: nil; tab-width: 4; fill-column: 78 -*-
*
* Copyright 2007, 2009 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 <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "emaillog.h"
#include "distcc.h"
#include "util.h"
#include "trace.h"
#include "bulk.h"
#include "snprintf.h"
/* if never_send_email is true, we won't send email
even if should_send_email is true */
static int should_send_email = 0;
static int never_send_email = 0;
static char *email_fname;
static int email_fileno = -1;
static int email_errno;
static const char logmailer[] = "/bin/mail";
static const char email_subject[] = "distcc-pump email" ;
static const char cant_send_message_format[] =
"Please notify %s that distcc tried to send them email but failed";
static const char will_send_message_format[] = "Will send an email to %s";
static const char dcc_emaillog_whom_to_blame[] = DCC_EMAILLOG_WHOM_TO_BLAME;
void dcc_please_send_email(void) {
should_send_email = 1;
}
void dcc_setup_log_email(void) {
never_send_email = !dcc_getenv_bool("DISTCC_ENABLE_DISCREPANCY_EMAIL", 0);
if (never_send_email)
return;
/* email_fname lives until the program exits.
The file itself will eventually get unlinked by dcc_cleanup_tempfiles(),
but email_fileno survives until after we send email, so the file won't
get removed until the emailing (child) process is done.
*/
dcc_make_tmpnam("distcc_error_log", "txt", &email_fname);
email_fileno = open(email_fname, O_RDWR | O_TRUNC);
if (email_fileno >= 0) {
rs_add_logger(rs_logger_file, RS_LOG_DEBUG, NULL, email_fileno);
rs_trace_set_level(RS_LOG_DEBUG);
} else {
email_errno = errno;
}
}
int dcc_add_file_to_log_email(const char *description,
const char *fname) {
char begin[] = "\nBEGIN ";
char end[] = "\nEND ";
int in_fd = 0;
off_t fsize;
if (never_send_email) return 0;
if (dcc_open_read(fname, &in_fd, &fsize))
return 1;
write(email_fileno, begin, strlen(begin));
write(email_fileno, description, strlen(description));
write(email_fileno, "\n", 1);
dcc_pump_readwrite(email_fileno, in_fd, fsize);
write(email_fileno, end, strlen(end));
write(email_fileno, description, strlen(description));
write(email_fileno, "\n", 1);
close(in_fd);
return 0;
}
void dcc_maybe_send_email(void) {
int child_pid = 0;
const char *whom_to_blame;
if ((whom_to_blame = getenv("DISTCC_EMAILLOG_WHOM_TO_BLAME"))
== NULL) {
whom_to_blame = dcc_emaillog_whom_to_blame;
}
char *cant_send_message_to;
if (should_send_email == 0) return;
if (never_send_email) return;
rs_log_warning(will_send_message_format, whom_to_blame);
asprintf(&cant_send_message_to, cant_send_message_format, whom_to_blame);
if (email_fileno < 0) {
errno = email_errno;
perror(cant_send_message_to);
free(cant_send_message_to);
return;
}
child_pid = fork();
if (child_pid == 0) {
if (dup2(email_fileno, 0) == -1 ||
lseek(email_fileno, 0, SEEK_SET) == -1 ||
execl(logmailer,
logmailer, "-s", email_subject, whom_to_blame,
(char*)NULL) == -1) {
perror(cant_send_message_to);
/* The fork succeeded but we didn't get to exec, or the exec
failed. We need to exit immediately, otherwise the cleanup
code will get executed twice.
*/
_exit(1);
}
} else if (child_pid < 0) {
perror(cant_send_message_to);
}
free(cant_send_message_to);
}
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