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/*
* Copyright (C) 1990-2008 by CERN/IT/ADC/CA
* All rights reserved
*/
#ifndef lint
static char sccsid[] = "@(#)$RCSfile: log.c,v $ $Revision: 1.4 $ $Date: 2008/01/29 15:04:42 $ CERN IT/ADC/CA Jean-Damien Durand";
#endif /* not lint */
/* log.c - generalized logging routines */
#if defined(_WIN32)
#include <io.h>
#include <pwd.h>
#else
#include <unistd.h>
#endif /* _WIN32 */
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h> /* standard input/output definitions */
#include <string.h>
#include <fcntl.h> /* file control */
#include <time.h> /* time related definitions */
#include <stdarg.h> /* variable argument list definitions */
#include <errno.h> /* standard error numbers & codes */
#include <log.h> /* logging options and definitions */
#include <Cglobals.h> /* Thread globals. Get Thread ID. */
static mode_t logbits=0666;
static int loglevel=LOG_NOLOG; /* logging level */
static char logname[64]; /* logging facility name */
static char logfilename[64]=""; /* log file name */
#if defined(_WIN32)
static char strftime_format[] = "%b %d %H:%M:%S";
#else /* _WIN32 */
static char strftime_format[] = "%b %e %H:%M:%S";
#endif /* _WIN32 */
static int pid; /* process identifier */
static int logfd ; /* logging file descriptor */
#if !defined(SOLARIS) && !defined(IRIX5) && !defined(hpux) && \
!defined(linux) && !defined(AIX42) && !defined(__Lynx__) && \
!defined(_WIN32) && !defined( __APPLE__)
extern int syslog();
#endif /* !SOLARIS && !IRIX5 && ... */
#if !defined(_WIN32)
extern char *getenv();
#else /* _WIN32 */
uid_t getpid();
#endif /* _WIN32 */
void DLL_DECL (*logfunc) _PROTO((int, char *, ...))=(void (*) _PROTO((int, char *, ...)))logit;
void DLL_DECL setlogbits _PROTO((int));
/*
* Opening log file.
* Storing the process pid.
*/
void DLL_DECL initlog(name, level, output)
char *name; /* facility name */
int level; /* logging level */
char *output; /* output specifier */
{
register char *p;
loglevel=level;
/* bypass level if set in environment */
if ((p = getenv("LOG_PRIORITY")) != NULL) {
loglevel=atoi(p);
}
/*
* Opening syslog path.
*/
strcpy(logname,name);
#if defined(sun) || defined(sgi) || defined(hpux) || defined(_AIX)
openlog(logname, LOG_PID, LOG_USER);
#endif /* sun || sgi || hpux || _AIX */
/*
* Opening log file and setting logfunc
* to either syslog or logit.
*/
if (!strcmp(output,"syslog")) {
logfunc=(void (*) _PROTO((int, char *, ...)))syslog;
} else if (!strcmp(output,"stdout")) {
logfunc=(void (*) _PROTO((int, char *, ...)))logit;
logfd= fileno(stdout) ; /* standard output */
} else {
logfunc=(void (*) _PROTO((int, char *, ...)))logit;
if (strlen(output) == 0) {
logfd= fileno(stderr) ; /* standard error */
} else {
strcpy(logfilename,output);
}
}
}
/*
* Mode bits for log file.
*/
void DLL_DECL setlogbits(bits)
int bits; /* logfile mode bits */
{
logbits=(mode_t) bits;
}
/*
* logit should be called with the following syntax
* logit(LOG_LEVEL,format[,value,...]) ;
*/
void DLL_DECL logit(int level, char *format, ...)
{
va_list args ; /* Variable argument list */
time_t clock;
#if defined(_REENTRANT) || defined(_THREAD_SAFE)
struct tm tmstruc;
#endif /* _REENTRANT || _THREAD_SAFE */
struct tm *tp;
char timestr[64] ; /* Time in its ASCII format */
char line[BUFSIZ] ; /* Formatted log message */
int fd; /* log file descriptor */
int Tid = 0; /* Thread ID if MT */
int save_errno;
save_errno = errno;
va_start(args, format);
if (loglevel >= level) {
(void) time(&clock);
#if ((defined(_REENTRANT) || defined(_THREAD_SAFE)) && !defined(_WIN32))
(void)localtime_r(&clock,&tmstruc);
tp = &tmstruc;
#else
tp = localtime(&clock);
#endif /* _REENTRANT || _THREAD_SAFE */
(void) strftime(timestr,64,strftime_format,tp);
Cglobals_getTid(&Tid);
if ( Tid < 0 ) {
/*
* Non-MT or main thread. Don't print thread ID.
*/
pid = getpid();
(void) sprintf(line,"%s %s[%d]: ",timestr,logname,pid) ;
} else {
#if defined(linux)
pid = getpgrp();
#else /* linux */
pid = getpid();
#endif /* linux */
(void) sprintf(line,"%s %s[%d,%d]: ",timestr,logname,pid,Tid) ;
}
(void) vsprintf(line+strlen(line),format,args);
if (strlen(logfilename)!=0) {
#ifdef O_LARGEFILE
if ( (fd= open(logfilename,O_CREAT|O_WRONLY|O_LARGEFILE|
O_APPEND,logbits)) == -1 ) {
#else
if ( (fd= open(logfilename,O_CREAT|O_WRONLY|
O_APPEND,logbits)) == -1 ) {
#endif
syslog(LOG_ERR,"open: %s: %m", logfilename);
/* FH we probably should retry */
va_end(args);
errno = save_errno;
return;
} else
/*
* To be sure that file access is enables
* even if root umask is not 0
*/
(void) chmod( logfilename, logbits );
} else {
if (strlen(logfilename)==0)
fd= fileno (stderr); /* standard error */
}
(void) write(fd,line,strlen(line)) ;
if (strlen(logfilename)!=0) (void) close(fd);
}
va_end(args);
errno = save_errno;
}
int DLL_DECL getloglv()
{
return(loglevel);
}
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