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SGI Freeware 2002 November
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SGI Freeware 2002 November - Disc 2.iso
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dist
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fw_glimpse.idb
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usr
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freeware
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src
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glimpse-3.0
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libtemplate
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util
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log.c.z
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log.c
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C/C++ Source or Header
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1997-09-09
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6KB
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278 lines
static char rcsid[] = "$Id: log.c,v 1.15 1995/02/04 01:37:54 hardy Exp $";
/*
* log.c - Logging facilities for Essence system.
*
* Darren Hardy, hardy@cs.colorado.edu, February 1994
*
* ----------------------------------------------------------------------
* Copyright (c) 1994, 1995. All rights reserved.
*
* Mic Bowman of Transarc Corporation.
* Peter Danzig of the University of Southern California.
* Darren R. Hardy of the University of Colorado at Boulder.
* Udi Manber of the University of Arizona.
* Michael F. Schwartz of the University of Colorado at Boulder.
*
* This copyright notice applies to all code in Harvest other than
* subsystems developed elsewhere, which contain other copyright notices
* in their source text.
*
* The Harvest software was developed by the Internet Research Task
* Force Research Group on Resource Discovery (IRTF-RD). The Harvest
* software may be used for academic, research, government, and internal
* business purposes without charge. If you wish to sell or distribute
* the Harvest software to commercial clients or partners, you must
* license the software. See
* http://harvest.cs.colorado.edu/harvest/copyright,licensing.html#licensing.
*
* The Harvest software is provided ``as is'', without express or
* implied warranty, and with no support nor obligation to assist in its
* use, correction, modification or enhancement. We assume no liability
* with respect to the infringement of copyrights, trade secrets, or any
* patents, and are not responsible for consequential damages. Proper
* use of the Harvest software is entirely the responsibility of the user.
*
* For those who are using Harvest for non-commercial purposes, you may
* make derivative works, subject to the following constraints:
*
* - You must include the above copyright notice and these accompanying
* paragraphs in all forms of derivative works, and any documentation
* and other materials related to such distribution and use acknowledge
* that the software was developed at the above institutions.
*
* - You must notify IRTF-RD regarding your distribution of the
* derivative work.
*
* - You must clearly notify users that your are distributing a modified
* version and not the original Harvest software.
*
* - Any derivative product is also subject to the restrictions of the
* copyright, including distribution and use limitations.
*/
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <time.h>
#include <sys/file.h>
#if defined(__STRICT_ANSI__)
#include <stdarg.h>
#else
#include <varargs.h>
#endif
#include "util.h"
/* Local functions */
static void standard_msg();
static void log_flush();
/* Local variables */
static FILE *fp_log = NULL;
static FILE *fp_errs = NULL;
static int pid;
static char *pname = NULL;
#if defined(USE_LOG_SYNC) && defined(HAVE_FLOCK)
static void lock_file(fp)
FILE *fp;
{
if (flock(fileno(fp), LOCK_EX) < 0)
log_errno("lockf");
if (fseek(fp, 0, SEEK_END) < 0)
log_errno("fseek");
}
static void unlock_file(fp)
FILE *fp;
{
if (flock(fileno(fp), LOCK_UN) < 0)
log_errno("lockf");
}
#else
#define lock_file(fp) /* nops */
#define unlock_file(fp)
#endif
/*
* init_log() - Initializes the logging routines. log() prints to
* FILE *a, and errorlog() prints to FILE *b;
*/
void init_log(a, b)
FILE *a, *b;
{
fp_log = a;
fp_errs = b;
pid = getpid();
pname = NULL;
}
void init_log3(pn, a, b)
char *pn;
FILE *a, *b;
{
fp_log = a;
fp_errs = b;
pid = getpid();
pname = strdup(pn);
}
/*
* log() - used like printf(3). Prints message to stdout.
*/
#if defined(__STRICT_ANSI__)
void log(char *fmt,...)
{
va_list ap;
if (fp_log == NULL)
return;
va_start(ap, fmt);
#else
void log(va_alist)
va_dcl
{
va_list ap;
char *fmt;
if (fp_log == NULL)
return;
va_start(ap);
fmt = va_arg(ap, char *);
#endif /* __STRICT_ANSI__ */
if (fp_log == NULL)
return;
lock_file(fp_log);
standard_msg(fp_log);
vfprintf(fp_log, fmt, ap);
va_end(ap);
log_flush(fp_log);
unlock_file(fp_log);
}
/*
* errorlog() - used like printf(3). Prints error message to stderr.
*/
#if defined(__STRICT_ANSI__)
void errorlog(char *fmt,...)
{
va_list ap;
if (fp_errs == NULL)
return;
va_start(ap, fmt);
#else
void errorlog(va_alist)
va_dcl
{
va_list ap;
char *fmt;
if (fp_errs == NULL)
return;
va_start(ap);
fmt = va_arg(ap, char *);
#endif /* __STRICT_ANSI__ */
if (fp_errs == NULL)
return;
lock_file(fp_errs);
standard_msg(fp_errs);
fprintf(fp_errs, "ERROR: ");
vfprintf(fp_errs, fmt, ap);
va_end(ap);
log_flush(fp_errs);
unlock_file(fp_errs);
}
/*
* fatal() - used like printf(3). Prints error message to stderr and exits
*/
#if defined(__STRICT_ANSI__)
void fatal(char *fmt,...)
{
va_list ap;
if (fp_errs == NULL)
exit(1);
va_start(ap, fmt);
#else
void fatal(va_alist)
va_dcl
{
va_list ap;
char *fmt;
if (fp_errs == NULL)
exit(1);
va_start(ap);
fmt = va_arg(ap, char *);
#endif /* __STRICT_ANSI__ */
if (fp_errs == NULL)
exit(1);
lock_file(fp_errs);
standard_msg(fp_errs);
fprintf(fp_errs, "FATAL: ");
vfprintf(fp_errs, fmt, ap);
va_end(ap);
log_flush(fp_errs);
unlock_file(fp_errs);
exit(1);
}
/*
* log_errno() - Same as perror(); doesn't print when errno == 0
*/
void log_errno(s)
char *s;
{
if (errno != 0)
errorlog("%s: %s\n", s, strerror(errno));
}
/*
* fatal_errno() - Same as perror()
*/
void fatal_errno(s)
char *s;
{
fatal("%s: %s\n", s, strerror(errno));
}
/*
* standard_msg() - Prints the standard pid and timestamp
*/
static void standard_msg(fp)
FILE *fp;
{
if (pname != NULL)
fprintf(fp, "%7s: ", pname);
else
fprintf(fp, "%7d: ", pid);
#ifdef LOG_TIMES
{
time_t t = time(NULL);
char buf[BUFSIZ];
strftime(buf, BUFSIZ - 1, "%y%m%d %H:%M:%S:", localtime(&t));
fprintf(fp, "%s ", buf);
}
#endif
}
static void log_flush(fp)
FILE *fp;
{
fflush(fp);
}