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/*
* \brief Logging facility with printf()-like interface
* \author Thomas Friebel <yaron@yaron.de>
* \date 2006-03-01
*/
#include <error.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <mach.h>
#include <execinfo.h>
#include "ddekit/printf.h"
extern boolean_t using_std;
static FILE *output;
/**
* Log constant string message w/o arguments
*
* \param msg message to be logged
*/
int ddekit_print(const char *msg)
{
int ret;
/* If LOG hasn't been initialized or failed its initialization,
* return the error. */
if (output == NULL)
return -1;
ret = fprintf (output, "%s", msg);
if (ret > 0)
fflush (output);
return ret;
}
/**
* Log message with print()-like arguments
*
* \param fmt format string followed by optional arguments
*/
int ddekit_printf(const char *fmt, ...)
{
int res;
va_list va;
va_start(va, fmt);
res = ddekit_vprintf(fmt, va);
va_end(va);
return res;
}
/* Log message with vprintf()-like arguments
*
* \param fmt format string
* \param va variable argument list
*/
int ddekit_vprintf(const char *fmt, va_list va)
{
char *tmp = NULL;
int ret;
ret = vasprintf (&tmp, fmt, va);
if (ret > 0) {
ret = ddekit_print (tmp);
free (tmp);
}
return ret;
}
int log_init ()
{
if (using_std) {
output = stderr;
}
else {
char template[] = "/var/log/dde_log.XXXXXX";
int ret = mkstemp (template);
if (ret < 0) {
error (0, errno, "mkstemp");
return -1;
}
output = fopen (template, "a+");
if (!output) {
error (0, errno, "open %s", template);
return -1;
}
}
return 0;
}
void dump_stack()
{
#define NUM_TRACES 16
void *trace[NUM_TRACES];
int trace_size = 0;
fprintf (stderr, "dump the stack\n");
trace_size = backtrace(trace, NUM_TRACES);
backtrace_symbols_fd(trace, trace_size, 2);
}
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