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log.c
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log.c
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#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include "trinity.h"
#include "shm.h"
FILE *parentlogfile;
void open_logfiles(void)
{
unsigned int i;
char *logfilename;
logfilename = malloc(64);
sprintf(logfilename, "trinity.log");
unlink(logfilename);
parentlogfile = fopen(logfilename, "a");
if (!parentlogfile) {
printf("## couldn't open logfile %s\n", logfilename);
exit(EXIT_FAILURE);
}
for (i = 0; i < shm->max_children; i++) {
sprintf(logfilename, "trinity-child%d.log", i);
unlink(logfilename);
shm->logfiles[i] = fopen(logfilename, "a");
if (!shm->logfiles[i]) {
printf("## couldn't open logfile %s\n", logfilename);
exit(EXIT_FAILURE);
}
}
free(logfilename);
}
void close_logfiles(void)
{
unsigned int i;
for (i = 0; i < shm->max_children; i++)
if (shm->logfiles[i] != NULL)
fclose(shm->logfiles[i]);
}
static FILE * find_logfile_handle(void)
{
pid_t pid;
int i;
unsigned int j;
pid = getpid();
if (pid == shm->parentpid)
return parentlogfile;
if (pid == shm->watchdog_pid)
return parentlogfile;
i = find_pid_slot(pid);
if (i != PIDSLOT_NOT_FOUND)
return shm->logfiles[i];
else {
/* try one more time. FIXME: This is awful. */
sleep(1);
i = find_pid_slot(pid);
if (i != PIDSLOT_NOT_FOUND)
return shm->logfiles[i];
printf("[%d] ## Couldn't find logfile for pid %d\n", getpid(), pid);
dump_pid_slots();
printf("## Logfiles for pids: ");
for (j = 0; j < shm->max_children; j++)
printf("%p ", shm->logfiles[j]);
printf("\n");
}
return NULL;
}
void synclogs(void)
{
unsigned int i;
int fd, ret;
if (logging == FALSE)
return;
for (i = 0; i < shm->max_children; i++) {
ret = fflush(shm->logfiles[i]);
if (ret == EOF) {
printf("## logfile flushing failed! %s\n", strerror(errno));
continue;
}
fd = fileno(shm->logfiles[i]);
if (fd != -1) {
ret = fsync(fd);
if (ret != 0)
printf("## fsyncing logfile %d failed. %s\n", i, strerror(errno));
}
}
(void)fflush(parentlogfile);
fsync(fileno(parentlogfile));
}
/*
* level defines whether it gets displayed to the screen with printf.
* (it always logs).
* 0 = everything, even all the registers
* 1 = Watchdog prints syscall count
* 2 = Just the reseed values
*
*/
void output(unsigned char level, const char *fmt, ...)
{
va_list args;
int n;
FILE *handle;
unsigned int len, i, j;
char outputbuf[1024];
char monobuf[1024];
va_start(args, fmt);
n = vsnprintf(outputbuf, sizeof(outputbuf), fmt, args);
va_end(args);
if (n < 0) {
printf("## Something went wrong in output() [%d]\n", n);
exit(EXIT_FAILURE);
}
if (quiet_level > level) {
printf("%s", outputbuf);
(void)fflush(stdout);
}
if (logging == FALSE)
return;
handle = find_logfile_handle();
if (!handle) {
printf("## child logfile handle was null logging to main!\n");
(void)fflush(stdout);
handle = parentlogfile;
sleep(5);
return;
}
/* If we've specified monochrome, we can just dump the buffer
* into the logfile as is. Otherwise, we need to strip out
* any ANSI codes that may be present.
*/
if (monochrome == TRUE) {
fprintf(handle, "%s", outputbuf);
(void)fflush(handle);
return;
}
/* copy buffer, sans ANSI codes */
len = strlen(outputbuf);
for (i = 0, j = 0; i < len; i++) {
if (outputbuf[i] == '')
i += 6;
else {
monobuf[j] = outputbuf[i];
j++;
}
}
monobuf[j] = '\0';
fprintf(handle, "%s", monobuf);
(void)fflush(handle);
}