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fc12b6b1c18756d50fd1f2c42e168874f734e951
sicspsi/logger.c

499 lines
12 KiB
C
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/*---------------------------------------------------------------------------
logger.c
Markus Zolliker, Sept 2004
----------------------------------------------------------------------------
*/
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <assert.h>
#include <fortify.h>
#include <errno.h>
#include "sics.h"
#include "logger.h"
#define LOGGER_NAN -999999.
struct Logger {
char *name;
char old[256];
int period;
time_t last;
long pos;
Logger *next;
};
static char *dir = NULL;
static Logger *vars = NULL;
static Logger *list;
static time_t lastLife = 0;
/*--------------------------------------------------------------------------*/
Logger *LoggerFind(char *name) {
Logger *p;
p = list;
while (p != NULL) {
if (0==strcasecmp(name, p->name)) {
return p;
}
p = p->next;
}
return NULL;
}
/*--------------------------------------------------------------------------*/
char *LoggerGetDir(void) {
char path[256], line[32];
FILE *fil;
time_t now;
static time_t last;
#define LASTLOGTXT "#last logging entry at:\n"
if (dir == NULL) {
dir = IFindOption(pSICSOptions, "LoggerDir");
snprintf(path, sizeof path, "%s/lastlife.dat", dir);
fil = fopen(path, "r");
if (fil) {
fgets(line, sizeof line, fil);
if (strcmp(line, LASTLOGTXT) == 0) {
fgets(line, sizeof line, fil);
lastLife = atol(line);
if (lastLife < 1000000000) {
printf("bad lastLife %ld\n", lastLife);
}
}
fclose(fil);
} else {
perror("open read error \n");
}
}
now = time(NULL);
if (now != last) {
snprintf(path, sizeof path, "%s/lastlife.dat", dir);
fil = fopen(path, "w");
if (fil) {
fprintf(fil, "%s%ld\n", LASTLOGTXT, now);
fclose(fil);
} else {
printf("can not open %s\n", path);
perror("open write error \n");
}
last = now;
}
return dir;
}
/*--------------------------------------------------------------------------*/
int LoggerWrite(Logger *log, time_t now, int period, char *value) {
char path[256], stim[32], buf[32];
struct tm *tm;
int yday, isdst;
int l;
int newday;
FILE *fil;
long pos;
LoggerGetDir();
if (dir == NULL) return 0;
if (now == 0) {
printf("now==0\n");
}
tm = localtime(&log->last);
yday = tm->tm_yday;
tm = localtime(&now);
if (tm->tm_yday != yday) {
log->period = 0;
} else if (0 == strncmp(value, log->old, sizeof(log->old))) {
return 0;
}
log->last = now;
snprintf(path, sizeof path, "%s/%s/", dir, log->name);
l = strlen(path);
strftime(path + l, sizeof path - l, "%m-%d.log", tm);
strftime(stim, sizeof stim, "#%Y-%m-%d %H:%M:%S\n", tm);
fil = fopen(path, "r+");
if (fil == NULL) { /* create new file */
fil = fopen(path, "w+");
if (fil == NULL) return 0;
fputs(stim, fil);
} else { /* check if file is actual */
fgets(buf, sizeof buf, fil);
if (0 != strncmp(buf, stim, 11)) {
fclose(fil);
fil=fopen(path, "w+"); /* overwrite old logfile */
if (fil == NULL) return 0;
fputs(stim, fil);
} else {
fseek(fil, 0, SEEK_END); /* set position to end */
}
}
if (period != log->period) {
log->period = period;
snprintf(buf, sizeof buf, "\t%d", period);
log->pos = 0;
} else {
buf[0]='\0';
}
/*
if (log->pos > 0) {
fseek(fil, log->pos, SEEK_SET);
}
log->pos = ftell(fil);
*/
strftime(stim, sizeof stim,"%H:%M:%S", tm);
fprintf(fil, "%s\t%s%s\n", stim, value, buf);
// if (0 != strncmp(value, log->old, sizeof(log->old)) || buf[0]!='\0') { /* value has changed */
// log->pos = ftell(fil); /* next time append to the end */
// }
l = strlen(value);
if (l >= sizeof(log->old)) {
l = sizeof(log->old) - 1;
}
strncpy(log->old, value, l);
log->old[l] = '\0';
fclose(fil);
return 1;
}
/*--------------------------------------------------------------------------*/
void LoggerKill(Logger *log) {
/* we do not really free the logger, it might be reused
for the same variable later. We set the value to undefined */
LoggerWrite(log, time(NULL), 0, "");
}
/*--------------------------------------------------------------------------*/
Logger *LoggerMake(char *name, int period) {
Logger *log, *p;
char path[256];
struct stat st;
int i;
time_t t;
LoggerGetDir();
if (dir == NULL) return NULL;
snprintf(path, sizeof path, "%s/%s", dir, name);
i = stat(path, &st);
if (i >= 0) {
if (((st.st_mode >> 12) & 15) != 4) { /* exists, but is no directory */
return NULL;
}
} else {
i = mkdir(path, S_IRWXU+S_IRGRP+S_IXGRP+S_IROTH+S_IXOTH);
if (i < 0) return NULL; /* mkdir failed */
}
log = LoggerFind(name); /* look if logger already exists */
if (log == NULL) {
log = malloc(sizeof *log);
if (log == NULL) return NULL;
log->name = strdup(name);
if (log->name == NULL) {
free(log);
return NULL;
}
log->period = 0;
log->old[0] = '\0';
log->last = 0;
log->pos = 0;
log->next = list;
list = log;
t = time(NULL) -1;
if (lastLife != 0 && lastLife + period < t) {
t = lastLife + period;
}
LoggerWrite(log, t, period, ""); /* value was undefined since last life of server */
}
return log;
}
/*--------------------------------------------------------------------------*/
typedef enum { numeric, text } CompType;
typedef struct {
SConnection *pCon;
CompType type;
time_t step;
time_t tlim;
time_t tmin, tmax, tlast, told;
float ymin, ymax, ylast, yold;
char slast[256];
char set[256];
} Compressor;
static void LoggerInit(Compressor *c, SConnection *pCon, time_t step) {
c->pCon = pCon;
c->step = step;
c->tmin = -2;
c->tmax = 0;
c->tlast = 0;
c->tlim = 0;
c->told = 0;
c->ylast = LOGGER_NAN;
}
static void LoggerOutStr(Compressor *c, time_t t, char *str) {
char line[256];
/* printf("out %ld %g\n", t, y); */
if (0 != strcmp(str, c->slast)) {
snprintf(line, sizeof line, "%ld %s\n", t - c->tlast, str);
c->tlast = t;
c->slast[0]='\0';
strncat(c->slast, str, sizeof c->slast - 1);
SCWrite(c->pCon, line, eStatus);
}
}
static void LoggerOut(Compressor *c, time_t t, float y) {
char line[80];
/* printf("out %ld %g\n", t, y); */
if (y != c->ylast) {
c->ylast = y;
if (y == LOGGER_NAN) {
snprintf(line, sizeof line, "%ld\n", t - c->tlast);
} else {
snprintf(line, sizeof line, "%ld %g\n", t - c->tlast, y);
}
/* printf("-%s\n", line); */
c->tlast = t;
SCWrite(c->pCon, line, eStatus);
}
}
static void LoggerPut(Compressor *c, time_t t, char *value) {
char *p;
double y;
if (c->type == numeric) {
if (t == 0) { /* finish */
t = c->tlim + 3 * c->step;
y = 0;
} else {
y = strtod(value, &p);
if (p == value) {
y = LOGGER_NAN;
} else {
if (y == LOGGER_NAN) y *= 1.0000002;
}
}
/* printf("put %ld %g\n", t, y); */
if (c->tlim == 0) goto first;
if (t >= c->tlim) {
c->tlim += c->step;
if (c->tmin > c->tmax) {
LoggerOut(c, c->tmax, c->ymax);
c->ymax = c->ymin;
c->tmax = c->tmin;
} else {
LoggerOut(c, c->tmin, c->ymin);
if (c->tmin == c->tmax) goto first;
c->ymin = c->ymax;
c->tmin = c->tmax;
}
if (t >= c->tlim) {
LoggerOut(c, c->tmin, c->ymin);
if (t >= c->tlim + c->step) {
LoggerOut(c, c->told, c->yold);
}
goto first;
}
}
if (y <= c->ymin) {
c->ymin = y;
c->tmin = t;
} else if (y > c->ymax) {
c->ymax = y;
c->tmax = t;
}
c->yold = y;
c->told = t;
return;
first:
c->tlim = t + 2 * c->step;
c->tmin = t;
c->tmax = t;
c->ymin = y;
c->ymax = y;
return;
} else if (c->type == text) {
if (t != 0) LoggerOutStr(c, t, value);
}
}
/*--------------------------------------------------------------------------*/
int LoggerGraph(SConnection *pCon, SicsInterp *pSics, void *pData,
int argc, char *argv[]) {
time_t from, to, step, xs, lastt, now;
char *p;
int i, l, yday, iret, loss;
int inRange;
time_t t, startim;
struct tm tm;
char stim[32], path[256], line[256], lastval[256];
char *lin, *val, *stp;
FILE *fil;
Compressor c;
float yy, lasty;
Logger *log;
if (argc < 2) goto illarg;
strtolower(argv[1]);
if (strcmp(argv[1], "vars") == 0) { /* default variables on a graph */
if (vars == NULL) {
vars = LoggerMake("vars", 1);
if (vars == NULL) return 0;
}
Arg2Text(argc-2, argv+2, line, sizeof line);
LoggerWrite(vars, time(NULL), 1, line);
SCSendOK(pCon);
return 1;
}
argtolower(argc, argv);
if (argc < 4) goto illarg;
now = time(NULL);
from = strtol(argv[1], &p, 0); /* unix time, not year 2038 safe */
if (p == argv[1]) goto illarg;
to = strtol(argv[2], NULL, 0);
if (p == argv[2]) goto illarg;
if (strcmp(argv[3],"text") == 0) { /* non-numeric values */
step = 1;
c.type = text;
} else {
step = strtol(argv[3], NULL, 0);
c.type = numeric;
}
if (p == argv[3]) goto illarg;
if (from <= 0) from += now;
if (to <= 0) to += now;
if (step <= 0) step = 1;
LoggerGetDir();
if (dir == NULL) {
SCWrite(pCon, "LoggerDir not found", eError);
return 0;
}
loss = 0;
for (i=4; i<argc; i++) {
startim = from;
t = 0;
lastt = 0;
inRange = 0;
xs = step;
LoggerInit(&c, pCon, step);
snprintf(path, sizeof path, "%s/%s/", dir, argv[i]);
l = strlen(path);
fil = NULL;
snprintf(line, sizeof line, "*%s\n", argv[i]);
SCWrite(pCon, line, eStatus);
while (startim <= to) {
tm = *localtime(&startim);
if (tm.tm_yday != yday) {
if (fil != NULL) { /* close file if day changed */
fclose(fil);
fil=NULL;
}
}
if (fil == NULL) {
yday = tm.tm_yday;
strftime(path + l, sizeof path - l, "%m-%d.log", &tm);
fil = fopen(path, "r");
if (fil != NULL) { /* check if file is from this year */
strftime(stim, sizeof stim, "#%Y-%m-%d", &tm);
fgets(line, sizeof line, fil);
if (0 != strncmp(line, stim, 11)) {
fclose(fil);
fil = NULL;
}
}
}
if (fil == NULL) {
lin == NULL;
} else {
do {
lin = fgets(line, sizeof line, fil);
/* printf("%s\n", line); */
if (lin == NULL) break;
p = strchr(line, '\n'); if (p) *p='\0';
p = strchr(line, '#'); if (p) *p='\0';
} while (lin[0] == '\0');
}
if (lin != NULL) {
/* printf(" %s\n", line); */
p = strchr(line, '\t');
if (p) {
*p='\0';
val = p+1;
} else {
val = "";
}
p = strchr(val, '\t');
if (p) {
stp = p+1;
*p='\0';
iret = sscanf(stp, "%ld", &xs);
if (iret == 1) {
if (xs < step) {
loss = 1;
xs = step;
}
}
}
iret = sscanf(line, "%d:%d:%d", &tm.tm_hour, &tm.tm_min, &tm.tm_sec);
if (iret != 3) {
lin = NULL;
} else {
tm.tm_isdst = -1;
t=mktime(&tm);
if (!inRange) {
if (t < startim) {
lastval[0]='\0';
strncat(lastval, val, sizeof lastval - 1);
lastt = t;
} else {
inRange=1;
if (lastt != 0) {
LoggerPut(&c, lastt, lastval);
}
LoggerPut(&c, t, val);
}
} else {
LoggerPut(&c, t, val);
}
}
}
if (lin == NULL) {
tm.tm_hour = 24; /* try next day */
tm.tm_min = 0;
tm.tm_sec = 0;
tm.tm_isdst = -1;
startim=mktime(&tm);
continue;
}
}
if (!inRange) {
if (lastt != 0) {
LoggerPut(&c, lastt, lastval);
}
}
LoggerPut(&c, 0, ""); /* finish */
log = LoggerFind(argv[i]);
if (log) { /* add actual value if it is within range */
if (to >= log->last) {
c.slast[0]='\0';
LoggerOutStr(&c, now, log->old);
}
}
if (fil) {
fclose(fil);
fil = NULL;
}
}
snprintf(line, sizeof line, "*%d %ld %ld\n", loss, from, to);
SCWrite(pCon, line, eStatus);
return 1;
illarg:
SCWrite(pCon, "illegal argument(s)", eError);
return 0;
}
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