396 lines
8.7 KiB
C++
396 lines
8.7 KiB
C++
/* syslog.cc
|
|
|
|
Copyright 1996, 1997, 1998 Cygnus Solutions.
|
|
|
|
This file is part of Cygwin.
|
|
|
|
This software is a copyrighted work licensed under the terms of the
|
|
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
|
|
details. */
|
|
|
|
#include "winsup.h"
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <syslog.h>
|
|
#include <stdarg.h>
|
|
#include <unistd.h>
|
|
|
|
/* FIXME: These should probably be in the registry. */
|
|
/* FIXME: The Win95 path should be whatever slash is */
|
|
|
|
#define WIN95_EVENT_LOG_PATH "C:\\CYGWIN_SYSLOG.TXT"
|
|
#define CYGWIN_LOG_NAME "Cygwin"
|
|
|
|
/*
|
|
* Utility function to help enable moving
|
|
* WIN95_EVENT_LOG_PATH into registry later.
|
|
*/
|
|
static const char *
|
|
get_win95_event_log_path ()
|
|
{
|
|
return WIN95_EVENT_LOG_PATH;
|
|
}
|
|
|
|
/* FIXME: For MT safe code these will need to be replaced */
|
|
|
|
#ifdef _MT_SAFE
|
|
#define process_ident _reent_winsup()->_process_ident
|
|
#define process_logopt _reent_winsup()->_process_logopt
|
|
#define process_facility _reent_winsup()->_process_facility
|
|
/* Default priority logmask */
|
|
#define process_logmask _reent_winsup()->_process_logmask
|
|
#else
|
|
static char *process_ident = 0;
|
|
static int process_logopt = 0;
|
|
static int process_facility = 0;
|
|
|
|
/* Default priority logmask */
|
|
static int process_logmask = LOG_UPTO (LOG_DEBUG);
|
|
#endif
|
|
|
|
/*
|
|
* openlog: save the passed args. Don't open the
|
|
* system log (NT) or log file (95) yet.
|
|
*/
|
|
extern "C"
|
|
void
|
|
openlog (const char *ident, int logopt, int facility)
|
|
{
|
|
debug_printf ("openlog called with (%s, %d, %d)",
|
|
ident ? ident : "<NULL>", logopt, facility);
|
|
|
|
if (process_ident != 0)
|
|
{
|
|
free (process_ident);
|
|
process_ident = 0;
|
|
}
|
|
if (ident)
|
|
{
|
|
process_ident = (char *) malloc (strlen (ident) + 1);
|
|
if (process_ident == 0)
|
|
{
|
|
debug_printf ("failed to allocate memory for process_ident");
|
|
return;
|
|
}
|
|
strcpy (process_ident, ident);
|
|
}
|
|
process_logopt = logopt;
|
|
process_facility = facility;
|
|
}
|
|
|
|
/* setlogmask: set the log priority mask and return previous mask.
|
|
If maskpri is zero, just return previous. */
|
|
#if 0
|
|
/* FIXME: nobody calls setlogmask? */
|
|
int
|
|
setlogmask (int maskpri)
|
|
{
|
|
if (maskpri == 0)
|
|
return process_logmask;
|
|
|
|
int old_mask = process_logmask;
|
|
process_logmask = maskpri & LOG_PRIMASK;
|
|
|
|
return old_mask;
|
|
}
|
|
#endif
|
|
|
|
/* Private class used to handle formatting of syslog message */
|
|
/* It is named pass_handler because it does a two-pass handling of log
|
|
strings. The first pass counts the length of the string, and the second
|
|
one builds the string. */
|
|
|
|
class pass_handler
|
|
{
|
|
private:
|
|
FILE *fp_;
|
|
char *message_;
|
|
int total_len_;
|
|
|
|
void shutdown ();
|
|
|
|
/* Explicitly disallow copies */
|
|
pass_handler (const pass_handler &);
|
|
pass_handler & operator = (const pass_handler &);
|
|
|
|
public:
|
|
pass_handler ();
|
|
~pass_handler ();
|
|
|
|
int initialize (int);
|
|
|
|
int print (const char *,...);
|
|
int print_va (const char *, va_list);
|
|
char *get_message () const { return message_; }
|
|
};
|
|
|
|
pass_handler::pass_handler () : fp_ (0), message_ (0), total_len_ (0)
|
|
{
|
|
;
|
|
}
|
|
|
|
pass_handler::~pass_handler ()
|
|
{
|
|
shutdown ();
|
|
}
|
|
|
|
void
|
|
pass_handler::shutdown ()
|
|
{
|
|
if (fp_ != 0)
|
|
{
|
|
fclose (fp_);
|
|
fp_ = 0;
|
|
}
|
|
if (message_ != 0)
|
|
delete[] message_;
|
|
}
|
|
|
|
int
|
|
pass_handler::initialize (int pass_number)
|
|
{
|
|
shutdown ();
|
|
if (pass_number == 0)
|
|
{
|
|
fp_ = fopen ("/dev/null", "wb");
|
|
if (fp_ == 0)
|
|
{
|
|
debug_printf ("failed to open /dev/null");
|
|
return -1;
|
|
}
|
|
total_len_ = 0;
|
|
}
|
|
else
|
|
{
|
|
message_ = new char[total_len_ + 1];
|
|
if (message_ == 0)
|
|
{
|
|
debug_printf ("failed to allocate message_");
|
|
return -1;
|
|
}
|
|
message_[0] = '\0';
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
pass_handler::print (const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
va_start (ap, fmt);
|
|
int ret = print_va (fmt, ap);
|
|
va_end (ap);
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
pass_handler::print_va (const char *fmt, va_list list)
|
|
{
|
|
if (fp_ != 0)
|
|
{
|
|
int len = vfprintf (fp_, fmt, list);
|
|
if (len < 0)
|
|
return -1;
|
|
total_len_ += len;
|
|
return 0;
|
|
}
|
|
else if (message_ != 0)
|
|
{
|
|
char *printpos = &message_[strlen (message_)];
|
|
vsprintf (printpos, fmt, list);
|
|
return 0;
|
|
}
|
|
debug_printf ("FAILURE ! fp_ and message_ both 0!! ");
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* syslog: creates the log message and writes to system
|
|
* log (NT) or log file (95). FIXME. WinNT log error messages
|
|
* don't look pretty, but in order to fix this we have to
|
|
* embed resources in the code and tell the NT registry
|
|
* where we are, blech (what happens if we move ?).
|
|
* We could, however, add the resources in Cygwin and
|
|
* always point to that.
|
|
*/
|
|
|
|
extern "C"
|
|
void
|
|
syslog (int priority, const char *message, ...)
|
|
{
|
|
debug_printf ("%x %s", priority, message);
|
|
/* If the priority fails the current mask, reject */
|
|
if (((priority & LOG_PRIMASK) & process_logmask) == 0)
|
|
{
|
|
debug_printf ("failing message %x due to priority mask %x",
|
|
priority, process_logmask);
|
|
return;
|
|
}
|
|
|
|
/* Translate %m in the message to error text */
|
|
char *errtext = strerror (get_errno ());
|
|
int errlen = strlen (errtext);
|
|
int numfound = 0;
|
|
|
|
for (const char *cp = message; *cp; cp++)
|
|
if (*cp == '%' && cp[1] == 'm')
|
|
numfound++;
|
|
|
|
char *newmessage = new char [strlen (message) + (errlen * numfound)];
|
|
|
|
if (newmessage == 0)
|
|
{
|
|
debug_printf ("failed to allocate newmessage");
|
|
return;
|
|
}
|
|
|
|
char *dst = newmessage;
|
|
for (const char *cp2 = message; *cp2; cp2++)
|
|
if (*cp2 == '%' && cp2[1] == 'm')
|
|
{
|
|
cp2++;
|
|
strcpy (dst, errtext);
|
|
while (*dst)
|
|
dst++;
|
|
}
|
|
else
|
|
*dst++ = *cp2;
|
|
|
|
*dst = '\0';
|
|
message = newmessage;
|
|
|
|
/* Work out the priority type - we ignore the facility for now.. */
|
|
WORD eventType;
|
|
switch (LOG_PRI (priority))
|
|
{
|
|
case LOG_ERR:
|
|
eventType = EVENTLOG_ERROR_TYPE;
|
|
break;
|
|
case LOG_WARNING:
|
|
eventType = EVENTLOG_WARNING_TYPE;
|
|
break;
|
|
case LOG_INFO:
|
|
eventType = EVENTLOG_INFORMATION_TYPE;
|
|
break;
|
|
default:
|
|
eventType = EVENTLOG_ERROR_TYPE;
|
|
break;
|
|
}
|
|
|
|
/* We need to know how long the buffer needs to be.
|
|
The only legal way I can see of doing this is to
|
|
do a vfprintf to /dev/null, and count the bytes
|
|
output, then do it again to a malloc'ed string. This
|
|
is ugly, slow, but prevents core dumps :-).
|
|
*/
|
|
int pass_number = 0;
|
|
va_list ap;
|
|
|
|
pass_handler pass;
|
|
for (; pass_number < 2; ++pass_number)
|
|
{
|
|
if (pass.initialize (pass_number) == -1)
|
|
return;
|
|
|
|
/* Deal with ident_string */
|
|
if (process_ident != 0)
|
|
{
|
|
if (pass.print ("%s : ", process_ident) == -1)
|
|
return;
|
|
}
|
|
if (process_logopt & LOG_PID)
|
|
{
|
|
if (pass.print ("Win32 Process Id = 0x%X : Cygwin Process Id = 0x%X : ",
|
|
GetCurrentProcessId(), getpid ()) == -1)
|
|
return;
|
|
}
|
|
|
|
if (os_being_run != winNT)
|
|
{
|
|
/* Add a priority string - not needed for NT
|
|
as NT has its own priority codes. */
|
|
switch (LOG_PRI (priority))
|
|
{
|
|
case LOG_ERR:
|
|
pass.print ("%s : ", "LOG_ERR");
|
|
break;
|
|
case LOG_WARNING:
|
|
pass.print ("%s : ", "LOG_WARNING");
|
|
break;
|
|
case LOG_INFO:
|
|
pass.print ("%s : ", "LOG_INFO");
|
|
break;
|
|
default:
|
|
pass.print ("%s : ", "LOG_ERR");
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Print out the variable part */
|
|
va_start (ap, message);
|
|
if (pass.print_va (message, ap) == -1)
|
|
return;
|
|
va_end (ap);
|
|
|
|
}
|
|
const char *msg_strings[1];
|
|
char *total_msg = pass.get_message ();
|
|
int len = strlen (total_msg);
|
|
if (len != 0 && (total_msg[len - 1] == '\n'))
|
|
total_msg[len - 1] = '\0';
|
|
|
|
msg_strings[0] = total_msg;
|
|
|
|
if (os_being_run == winNT)
|
|
{
|
|
/* For NT, open the event log and send the message */
|
|
HANDLE hEventSrc = RegisterEventSourceA (NULL, (process_ident != 0) ?
|
|
process_ident : CYGWIN_LOG_NAME);
|
|
if (hEventSrc == 0)
|
|
{
|
|
debug_printf ("RegisterEventSourceA failed with %E");
|
|
return;
|
|
}
|
|
ReportEventA (hEventSrc, eventType, 0, 0,
|
|
NULL, 1, 0, msg_strings, NULL);
|
|
DeregisterEventSource (hEventSrc);
|
|
}
|
|
else
|
|
{
|
|
/* Under Windows 95, append the message to the log file */
|
|
FILE *fp = fopen (get_win95_event_log_path (), "a");
|
|
if (fp == 0)
|
|
{
|
|
debug_printf ("failed to open file %s",
|
|
get_win95_event_log_path ());
|
|
return;
|
|
}
|
|
/* Now to prevent several syslog messages from being
|
|
interleaved, we must lock the first byte of the file
|
|
This works on Win32 even if we created the file above.
|
|
*/
|
|
HANDLE fHandle = dtable[fileno (fp)]->get_handle ();
|
|
if (LockFile (fHandle, 0, 0, 1, 0) == FALSE)
|
|
{
|
|
debug_printf ("failed to lock file %s", get_win95_event_log_path());
|
|
fclose (fp);
|
|
return;
|
|
}
|
|
fputs (msg_strings[0], fp);
|
|
fputc ('\n', fp);
|
|
UnlockFile (fHandle, 0, 0, 1, 0);
|
|
if (ferror (fp))
|
|
{
|
|
debug_printf ("error in writing syslog");
|
|
}
|
|
fclose (fp);
|
|
}
|
|
}
|
|
|
|
extern "C"
|
|
void
|
|
closelog (void)
|
|
{
|
|
;
|
|
}
|