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/*= -*- c-basic-offset: 4; indent-tabs-mode: nil; -*-
*
* librsync -- library for network deltas
* Id: trace.c,v 1.46 2001/03/18 14:29:53 mbp Exp
*
* Copyright (C) 2000, 2001 by Martin Pool <mbp@samba.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
| Finality is death.
| Perfection is finality.
| Nothing is perfect.
| There are lumps in it.
*/
/*
* TODO: Have a bit set in the log level that says not to include the
* function name.
*/
#include <config.h>
#include <unistd.h>
#include <stdio.h>
#include <sys/file.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
#include <assert.h>
#include <stdarg.h>
#include "rsync.h"
#include "util.h"
#include "trace.h"
rs_trace_fn_t *rs_trace_impl = rs_trace_stderr;
int rs_trace_level = RS_LOG_INFO;
#ifdef HAVE_PROGRAM_INVOCATION_NAME
# define MY_NAME program_invocation_short_name
#else
# define MY_NAME "librsync"
#endif
static void rs_log_va(int level, char const *fn, char const *fmt, va_list va);
#if SIZEOF_SIZE_T > SIZEOF_LONG
# warning size_t is larger than a long integer, values in trace messages may be wrong
#endif
/**
* Log severity strings, if any. Must match ordering in
* ::rs_loglevel.
*/
static const char *rs_severities[] = {
"EMERGENCY! ", "ALERT! ", "CRITICAL! ", "ERROR: ", "Warning: ",
"", "", ""
};
/**
* \brief Set the destination of trace information.
*
* The callback scheme allows for use within applications that may
* have their own particular ways of reporting errors: log files for a
* web server, perhaps, and an error dialog for a browser.
*
* \todo Do we really need such fine-grained control, or just yes/no
* tracing?
*/
void
rs_trace_to(rs_trace_fn_t * new_impl)
{
rs_trace_impl = new_impl;
}
/**
* Set the least important message severity that will be output.
*/
void
rs_trace_set_level(rs_loglevel level)
{
rs_trace_level = level;
}
static void
rs_log_va(int flags, char const *fn, char const *fmt, va_list va)
{
int level = flags & RS_LOG_PRIMASK;
if (rs_trace_impl && level <= rs_trace_level) {
char buf[1000];
char full_buf[1000];
vsnprintf(buf, sizeof buf - 1, fmt, va);
if (flags & RS_LOG_NONAME) {
snprintf(full_buf, sizeof full_buf - 1,
"%s: %s%s\n",
MY_NAME, rs_severities[level], buf);
} else {
snprintf(full_buf, sizeof full_buf - 1,
"%s: %s(%s) %s\n",
MY_NAME, rs_severities[level], fn, buf);
}
rs_trace_impl(level, full_buf);
}
}
/**
* Called by a macro, used on platforms where we can't determine the
* calling function name.
*/
void
rs_log0_nofn(int level, char const *fmt, ...)
{
va_list va;
va_start(va, fmt);
rs_log_va(level, PACKAGE, fmt, va);
va_end(va);
}
/* Called by a macro that prepends the calling function name,
* etc. */
void
rs_log0(int level, char const *fn, char const *fmt, ...)
{
va_list va;
va_start(va, fmt);
rs_log_va(level, fn, fmt, va);
va_end(va);
}
void
rs_trace_stderr(int UNUSED(level), char const *msg)
{
/* NOTE NO TRAILING NUL */
write(STDERR_FILENO, msg, strlen(msg));
}
/* This is called directly if the machine doesn't allow varargs
* macros. */
void
rs_fatal0(char const *s, ...)
{
va_list va;
va_start(va, s);
rs_log_va(RS_LOG_CRIT, PACKAGE, s, va);
va_end(va);
}
/* This is called directly if the machine doesn't allow varargs
* macros. */
void
rs_error0(char const *s, ...)
{
va_list va;
va_start(va, s);
rs_log_va(RS_LOG_ERR, PACKAGE, s, va);
va_end(va);
}
/* This is called directly if the machine doesn't allow varargs
* macros. */
void
rs_trace0(char const *s, ...)
{
va_list va;
va_start(va, s);
rs_log_va(RS_LOG_DEBUG, PACKAGE, s, va);
va_end(va);
}
/**
* Return true if the library contains trace code; otherwise false.
* If this returns false, then trying to turn trace on will achieve
* nothing.
*/
int
rs_supports_trace(void)
{
#ifdef DO_RS_TRACE
return 1;
#else
return 0;
#endif /* !DO_RS_TRACE */
}
|
