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Server : Apache System : Linux profile 3.10.0-1160.88.1.el7.x86_64 #1 SMP Tue Mar 7 15:41:52 UTC 2023 x86_64 User : apache ( 48) PHP Version : 8.0.28 Disable Function : NONE Directory : /Data/.backup/script/fcron-3.2.0/ |
/*
* FCRON - periodic command scheduler
*
* Copyright 2000-2014 Thibault Godouet <fcron@free.fr>
*
* 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
*
* The GNU General Public License can also be found in the file
* `LICENSE' that comes with the fcron source distribution.
*/
/* This code was originally inspired by Anacron's sources of
Itai Tzur <itzur@actcom.co.il> */
#include "fcron.h"
#include "log.h"
#include <sys/types.h>
#include <sys/socket.h>
#ifdef DEBUG
char debug_opt = 1; /* set to 1 if we are in debug mode */
#else
char debug_opt = 0; /* set to 1 if we are in debug mode */
#endif
int dosyslog = 1;
char *logfile_path = NULL;
char *make_msg(const char *append, char *fmt, va_list args);
void log_syslog_str(int priority, char *msg);
void log_file_str(int priority, char *msg);
void log_console_str(int priority, char *msg);
void log_fd_str(int fd, char *msg);
static void print_line_prefix(FILE * logfile, int priority);
static void xlog(int priority, int fd, char *fmt, va_list args);
static void xlog_e(int priority, int fd, char *fmt, va_list args);
#ifdef HAVE_LIBPAM
static void log_pame(int priority, pam_handle_t * pamh, int pamerrno,
char *fmt, va_list args);
#endif
static char truncated[] = " (truncated)";
static int log_open = 0;
static FILE *logfile = NULL;
/* Initialise logging to either syslog or a file specified in fcron.conf,
* or take no action if logging is suppressed.
* This function will be called automatically if you attempt to log something,
* however you may have to call it explicitely as it needs to run before the
* program becomes a daemon so as it can print an error on the console
* if it can't open the logs correctly. */
void
xopenlog(void)
{
if (log_open)
return;
/* we MUST set log_open to 1 before doing anything else. That way,
* if we call a function that logs something, which calls xopenlog,
* then we won't end up in a nasty loop */
log_open = 1;
// are we logging to a file or using syslog or not logging at all?
if (dosyslog) {
openlog(prog_name, LOG_PID, SYSLOG_FACILITY);
}
if (logfile_path != NULL) {
logfile = fopen(logfile_path, "a");
if (logfile == NULL) {
int saved_errno = errno;
if (dosyslog) {
/* we have already called openlog() which cannot fail */
syslog(COMPLAIN_LEVEL, "Could not fopen log file '%s': %s",
logfile_path, strerror(saved_errno));
}
print_line_prefix(stderr, COMPLAIN_LEVEL);
fprintf(stderr, "Could not fopen log file '%s': %s\n", logfile_path,
strerror(saved_errno));
}
}
}
void
xcloselog()
{
if (!log_open)
return;
// check whether we need to close syslog, or a file.
if (logfile != NULL) {
/* we must NOT use xfclose_check() in log.c to avoid infinite loops */
if (xfclose(&logfile) != 0) {
int saved_errno = errno;
syslog(COMPLAIN_LEVEL, "Error while closing log file '%s': %s",
logfile_path, strerror(saved_errno));
if (foreground == 1) {
print_line_prefix(stderr, COMPLAIN_LEVEL);
fprintf(stderr, "Error while closing log file '%s': %s\n",
logfile_path, strerror(saved_errno));
}
}
}
if (dosyslog) {
closelog();
}
log_open = 0;
}
/* Construct the message string from its parts, and append a string to it */
char *
make_msg(const char *append, char *fmt, va_list args)
{
int len;
char *msg = NULL;
if ((msg = calloc(1, MAX_MSG + 1)) == NULL)
return NULL;
/* There's some confusion in the documentation about what vsnprintf
* returns when the buffer overflows. Hmmm... */
len = vsnprintf(msg, MAX_MSG + 1, fmt, args);
if (append != NULL) {
size_t size_to_cat = ((MAX_MSG - len) > 0) ? (MAX_MSG - len) : 0;
strncat(msg, ": ", size_to_cat);
strncat(msg, append, size_to_cat);
len += 2 + strlen(append);
}
if (len >= MAX_MSG)
strcpy(msg + (MAX_MSG - 1) - sizeof(truncated), truncated);
return msg;
}
/* log a simple string to syslog if needed */
void
log_syslog_str(int priority, char *msg)
{
if (dosyslog) {
xopenlog();
syslog(priority, "%s", msg);
}
}
/* log a simple string to a log file if needed */
void
log_file_str(int priority, char *msg)
{
xopenlog();
/* we may have failed to open the logfile - check if
* it does exist *after* xopenlog() */
if (logfile != NULL) {
print_line_prefix(logfile, priority);
fprintf(logfile, "%s\n", msg);
fflush(logfile);
}
}
/* log a simple string to console if needed */
void
log_console_str(int priority, char *msg)
{
if (foreground == 1) {
print_line_prefix(stderr, priority);
fprintf(stderr, "%s\n", msg);
}
}
/* log a simple string to fd if needed */
void
log_fd_str(int fd, char *msg)
{
if (fd >= 0) {
send(fd, msg, strlen(msg), 0);
send(fd, "\n", strlen("\n"), 0);
}
}
/* Log a message, described by "fmt" and "args", with the specified
* "priority". */
/* write it also to fd if positive, and to stderr if foreground==1 */
static void
xlog(int priority, int fd, char *fmt, va_list args)
{
char *msg;
if ((msg = make_msg(NULL, fmt, args)) == NULL)
return;
log_syslog_str(priority, msg);
log_file_str(priority, msg);
log_console_str(priority, msg);
log_fd_str(fd, msg);
Free_safe(msg);
}
/* Same as xlog(), but also appends an error description corresponding
* to "errno". */
static void
xlog_e(int priority, int fd, char *fmt, va_list args)
{
int saved_errno;
char *msg;
saved_errno = errno;
if ((msg = make_msg(strerror(saved_errno), fmt, args)) == NULL)
return;
log_syslog_str(priority, msg);
log_file_str(priority, msg);
log_console_str(priority, msg);
log_fd_str(fd, msg);
Free_safe(msg);
}
/* write a message to the file specified by logfile. */
static void
print_line_prefix(FILE * logfile, int priority)
{
time_t t = time(NULL);
struct tm *ft;
char date[30];
char *type;
// print the current time as a string.
ft = localtime(&t);
date[0] = '\0';
strftime(date, sizeof(date), "%Y-%m-%d %H:%M:%S", ft);
// is it an info/warning/error/debug message?
switch (priority) {
case EXPLAIN_LEVEL:
type = " INFO";
break;
case WARNING_LEVEL:
type = " WARN";
break;
case COMPLAIN_LEVEL:
type = "ERROR";
break;
case DEBUG_LEVEL:
type = "DEBUG";
break;
default:
type = "UNKNOWN_SEVERITY";
}
// print the log message.
fprintf(logfile, "%s %s ", date, type);
}
#ifdef HAVE_LIBPAM
/* Same as log_syslog(), but also appends an error description corresponding
* to the pam_error. */
static void
log_pame(int priority, pam_handle_t * pamh, int pamerrno, char *fmt,
va_list args)
{
char *msg;
if ((msg = make_msg(pam_strerror(pamh, pamerrno), fmt, args)) == NULL)
return;
log_syslog_str(priority, msg);
log_console_str(priority, msg);
xcloselog();
Free_safe(msg);
}
#endif
/* Log an "explain" level message */
void
explain(char *fmt, ...)
{
va_list args;
va_start(args, fmt);
xlog(EXPLAIN_LEVEL, -1, fmt, args);
va_end(args);
}
/* as explain(), but also write message to fd if positive */
void
explain_fd(int fd, char *fmt, ...)
{
va_list args;
va_start(args, fmt);
xlog(EXPLAIN_LEVEL, fd, fmt, args);
va_end(args);
}
/* Log an "explain" level message, with an error description */
void
explain_e(char *fmt, ...)
{
va_list args;
va_start(args, fmt);
xlog_e(EXPLAIN_LEVEL, -1, fmt, args);
va_end(args);
}
/* Log a "warning" level message */
void
warn(char *fmt, ...)
{
va_list args;
va_start(args, fmt);
xlog(WARNING_LEVEL, -1, fmt, args);
va_end(args);
}
/* as warn(), but also write message to fd if positive */
void
warn_fd(int fd, char *fmt, ...)
{
va_list args;
va_start(args, fmt);
xlog(WARNING_LEVEL, fd, fmt, args);
va_end(args);
}
/* Log a "warning" level message, with an error description */
void
warn_e(char *fmt, ...)
{
va_list args;
va_start(args, fmt);
xlog_e(WARNING_LEVEL, -1, fmt, args);
va_end(args);
}
/* Log a "complain" level message */
void
error(char *fmt, ...)
{
va_list args;
va_start(args, fmt);
xlog(COMPLAIN_LEVEL, -1, fmt, args);
va_end(args);
}
/* as error(), but also write message to fd if positive */
void
error_fd(int fd, char *fmt, ...)
{
va_list args;
va_start(args, fmt);
xlog(COMPLAIN_LEVEL, fd, fmt, args);
va_end(args);
}
/* Log a "complain" level message, with an error description */
void
error_e(char *fmt, ...)
{
va_list args;
va_start(args, fmt);
xlog_e(COMPLAIN_LEVEL, -1, fmt, args);
va_end(args);
}
#ifdef HAVE_LIBPAM
/* Log a "complain" level message, with a PAM error description */
void
error_pame(pam_handle_t * pamh, int pamerrno, char *fmt, ...)
{
va_list args;
xcloselog(); /* PAM is likely to have used openlog() */
va_start(args, fmt);
log_pame(COMPLAIN_LEVEL, pamh, pamerrno, fmt, args);
va_end(args);
}
#endif
/* Log a "complain" level message, and exit */
void
die(char *fmt, ...)
{
va_list args;
va_start(args, fmt);
xlog(COMPLAIN_LEVEL, -1, fmt, args);
va_end(args);
if (getpid() == daemon_pid) {
error("Aborted");
}
else {
error("fcron child aborted: this does not affect the main fcron daemon,"
" but this may prevent a job from being run or an email from being sent.");
}
exit(EXIT_ERR);
}
/* Log a "complain" level message, with an error description, and exit */
void
die_e(char *fmt, ...)
{
va_list args;
int err_no = 0;
err_no = errno;
va_start(args, fmt);
xlog_e(COMPLAIN_LEVEL, -1, fmt, args);
va_end(args);
if (getpid() == daemon_pid) {
error("Aborted");
}
else {
error("fcron child aborted: this does not affect the main fcron daemon,"
" but this may prevent a job from being run or an email from being sent.");
}
exit(err_no);
}
#ifdef HAVE_LIBPAM
/* Log a "complain" level message, with a PAM error description, and exit */
void
die_pame(pam_handle_t * pamh, int pamerrno, char *fmt, ...)
{
va_list args;
xcloselog(); /* PAM is likely to have used openlog() */
va_start(args, fmt);
log_pame(COMPLAIN_LEVEL, pamh, pamerrno, fmt, args);
va_end(args);
pam_end(pamh, pamerrno);
if (getpid() == daemon_pid)
error("Aborted");
exit(EXIT_ERR);
}
#endif
/* Log a "debug" level message */
void
Debug(char *fmt, ...)
{
va_list args;
va_start(args, fmt);
xlog(DEBUG_LEVEL, -1, fmt, args);
va_end(args);
}
/* write message to fd, and to syslog in "debug" level message if debug_opt */
void
send_msg_fd_debug(int fd, char *fmt, ...)
{
char *msg;
va_list args;
va_start(args, fmt);
if ((msg = make_msg(NULL, fmt, args)) == NULL)
return;
if (debug_opt)
log_syslog_str(DEBUG_LEVEL, msg);
log_fd_str(fd, msg);
Free_safe(msg);
va_end(args);
}
/* write message to fd */
void
send_msg_fd(int fd, char *fmt, ...)
{
char *msg;
va_list args;
va_start(args, fmt);
if ((msg = make_msg(NULL, fmt, args)) == NULL)
return;
log_fd_str(fd, msg);
Free_safe(msg);
va_end(args);
}