1 #include "rrd_graph.h"
3 #define dprintf if (gdp->debug) printf
5 /* Define prototypes for the parsing methods.
6 Inputs:
7 char *line - pointer to base of input source
8 unsigned int eaten - index to next input character (INPUT/OUTPUT)
9 graph_desc_t *gdp - pointer to a graph description
10 image_desc_t *im - pointer to an image description
11 */
13 int rrd_parse_find_gf (char *, unsigned int *, graph_desc_t *);
14 int rrd_parse_legend (char *, unsigned int *, graph_desc_t *);
15 int rrd_parse_color (char *, graph_desc_t *);
16 int rrd_parse_CF (char *, unsigned int *, graph_desc_t *, enum cf_en *);
17 int rrd_parse_print (char *, unsigned int *, graph_desc_t *, image_desc_t *);
18 int rrd_parse_shift (char *, unsigned int *, graph_desc_t *, image_desc_t *);
19 int rrd_parse_xport (char *, unsigned int *, graph_desc_t *, image_desc_t *);
20 int rrd_parse_PVHLAST (char *, unsigned int *, graph_desc_t *, image_desc_t *);
21 int rrd_parse_vname (char *, unsigned int *, graph_desc_t *, image_desc_t *);
22 int rrd_parse_def (char *, unsigned int *, graph_desc_t *, image_desc_t *);
23 int rrd_parse_vdef (char *, unsigned int *, graph_desc_t *, image_desc_t *);
24 int rrd_parse_cdef (char *, unsigned int *, graph_desc_t *, image_desc_t *);
28 int
29 rrd_parse_find_gf(char *line, unsigned int *eaten, graph_desc_t *gdp) {
30 char funcname[11],c1=0,c2=0;
31 int i=0;
33 sscanf(&line[*eaten], "DEBUG%n", &i);
34 if (i) {
35 gdp->debug=1;
36 (*eaten)+=i;
37 i=0;
38 dprintf("Scanning line '%s'\n",&line[*eaten]);
39 }
40 sscanf(&line[*eaten], "%10[A-Z]%n%c%c", funcname, &i, &c1, &c2);
41 if (!i) {
42 rrd_set_error("Could not make sense out of '%s'",line);
43 return 1;
44 }
45 if ((int)(gdp->gf=gf_conv(funcname)) == -1) {
46 rrd_set_error("'%s' is not a valid function name", funcname);
47 return 1;
48 }
49 if (gdp->gf == GF_LINE) {
50 if (c1 < '1' || c1 > '3' || c2 != ':') {
51 rrd_set_error("Malformed LINE command: %s",line);
52 return 1;
53 }
54 gdp->linewidth=c1-'0';
55 i++;
56 } else {
57 if (c1 != ':') {
58 rrd_set_error("Malformed %s command: %s",funcname,line);
59 return 1;
60 }
61 }
62 *eaten+=++i;
63 return 0;
64 }
66 int
67 rrd_parse_legend(char *line, unsigned int *eaten, graph_desc_t *gdp) {
68 int i;
70 dprintf("- examining '%s'\n",&line[*eaten]);
72 i=scan_for_col(&line[*eaten],FMT_LEG_LEN,gdp->legend);
74 *eaten += i;
75 if (line[*eaten]!='\0' && line[*eaten]!=':') {
76 rrd_set_error("Legend too long");
77 return 1;
78 } else {
79 dprintf("- found legend '%s'\n", gdp->legend);
80 return 0;
81 }
82 }
84 int
85 rrd_parse_color(char *string, graph_desc_t *gdp) {
86 unsigned int r=0,g=0,b=0,a=0;
87 int i1=0,i2=0,i3=0;
89 if (string[0] != '#') return 1;
90 sscanf(string, "#%02x%02x%02x%n%02x%n%*s%n",
91 &r,&g,&b,&i1,&a,&i2,&i3);
93 if (i3) return 1; /* garbage after color */
94 if (!i2) a=0xFF;
95 if (!i1) return 1; /* no color after '#' */
96 gdp->col = r<<24|g<<16|b<<8|a;
97 return 0;
98 }
100 int
101 rrd_parse_CF(char *line, unsigned int *eaten, graph_desc_t *gdp, enum cf_en *cf) {
102 char symname[CF_NAM_SIZE];
103 int i=0;
105 sscanf(&line[*eaten], CF_NAM_FMT "%n", symname,&i);
106 if ((!i)||((line[*eaten+i]!='\0')&&(line[*eaten+i]!=':'))) {
107 rrd_set_error("Cannot parse CF in '%s'",line);
108 return 1;
109 }
110 (*eaten)+=i;
111 dprintf("- using CF '%s'\n",symname);
113 if ((int)(*cf = cf_conv(symname))==-1) {
114 rrd_set_error("Unknown CF '%s' in '%s'",symname,line);
115 return 1;
116 }
118 if (line[*eaten]!='\0') (*eaten)++;
119 return 0;
120 }
122 /* Parsing old-style xPRINT and new-style xPRINT */
123 int
124 rrd_parse_print(char *line, unsigned int *eaten, graph_desc_t *gdp, image_desc_t *im) {
125 /* vname:CF:format in case of DEF-based vname
126 ** vname:CF:format in case of CDEF-based vname
127 ** vname:format in case of VDEF-based vname
128 */
129 char tmpstr[MAX_VNAME_LEN+1];
130 int i=0;
132 sscanf(&line[*eaten], DEF_NAM_FMT ":%n", tmpstr,&i);
133 if (!i) {
134 rrd_set_error("Could not parse line '%s'",line);
135 return 1;
136 }
137 (*eaten)+=i;
138 dprintf("- Found candidate vname '%s'\n",tmpstr);
140 if ((gdp->vidx=find_var(im,tmpstr))<0) {
141 rrd_set_error("Not a valid vname: %s in line %s",tmpstr,line);
142 return 1;
143 }
144 switch (im->gdes[gdp->vidx].gf) {
145 case GF_DEF:
146 case GF_CDEF:
147 dprintf("- vname is of type DEF or CDEF, looking for CF\n");
148 if (rrd_parse_CF(line,eaten,gdp,&gdp->cf)) return 1;
149 break;
150 case GF_VDEF:
151 dprintf("- vname is of type VDEF\n");
152 break;
153 default:
154 rrd_set_error("Encountered unknown type variable '%s'",tmpstr);
155 return 1;
156 }
158 if (rrd_parse_legend(line,eaten,gdp)) return 1;
160 /* Why is there a separate structure member "format" ??? */
161 strcpy(gdp->format,gdp->legend);
163 return 0;
164 }
166 int
167 rrd_parse_shift(char *line, unsigned int *eaten, graph_desc_t *gdp, image_desc_t *im) {
168 char *l = strdup(line + *eaten), *p;
169 int rc = 1;
171 p = strchr(l, ',');
172 if (p == NULL) {
173 rrd_set_error("Invalid SHIFT syntax");
174 goto out;
175 }
176 *p++ = '\0';
178 if ((gdp->vidx=find_var(im,l))<0) {
179 rrd_set_error("Not a valid vname: %s in line %s",l,line);
180 goto out;
181 }
183 /* constant will parse; otherwise, must be VDEF reference */
184 if (sscanf(p, "%ld", &gdp->shval) != 1) {
185 graph_desc_t *vdp;
187 if ((gdp->shidx=find_var(im, p))<0) {
188 rrd_set_error("invalid offset vname: %s", p);
189 goto out;
190 }
192 vdp = &im->gdes[gdp->shidx];
193 if (vdp->gf != GF_VDEF) {
194 rrd_set_error("offset must specify value or VDEF");
195 goto out;
196 }
197 } else {
198 gdp->shidx = -1;
199 }
201 *eaten = strlen(line);
202 rc = 0;
204 out:
205 free(l);
206 return rc;
207 }
209 int
210 rrd_parse_xport(char *line, unsigned int *eaten, graph_desc_t *gdp, image_desc_t *im) {
211 char *l = strdup(line + *eaten), *p;
212 int rc = 1;
214 p = strchr(l, ':');
215 if (p != NULL)
216 *p++ = '\0';
217 else
218 p = "";
220 if ((gdp->vidx=find_var(im, l))==-1){
221 rrd_set_error("unknown variable '%s'",l);
222 goto out;
223 }
225 if (strlen(p) >= FMT_LEG_LEN)
226 *(p + FMT_LEG_LEN) = '\0';
228 strcpy(gdp->legend, p);
229 *eaten = strlen(line);
230 rc = 0;
232 out:
233 free(l);
234 return rc;
235 }
237 /* Parsing of PART, VRULE, HRULE, LINE, AREA, STACK and TICK
238 ** is done in one function. Stacking STACK is silently ignored
239 ** as it is redundant. Stacking PART, VRULE, HRULE or TICK is
240 ** not allowed. The check for color doesn't need to be so strict
241 ** anymore, the user can specify the color '#00000000' and
242 ** effectively circumvent this check, so why bother.
243 **
244 ** If a number (which is valid to enter) is more than a
245 ** certain amount of characters, it is caught as an error.
246 ** While this is arguable, so is entering fixed numbers
247 ** with more than MAX_VNAME_LEN significant digits.
248 */
249 int
250 rrd_parse_PVHLAST(char *line, unsigned int *eaten, graph_desc_t *gdp, image_desc_t *im) {
251 int i,j;
252 int colorfound=0;
253 char tmpstr[MAX_VNAME_LEN + 10]; /* vname#RRGGBBAA\0 */
255 dprintf("- parsing '%s'\n",&line[*eaten]);
256 dprintf("- from line '%s'\n",line);
258 i=scan_for_col(&line[*eaten],MAX_VNAME_LEN+9,tmpstr);
259 if (line[*eaten+i]!='\0' && line[*eaten+i]!=':') {
260 rrd_set_error("Cannot parse line '%s'",line);
261 return 1;
262 }
264 j=i; while (j>0 && tmpstr[j]!='#') j--;
266 if (tmpstr[j]=='#') {
267 if (rrd_parse_color(&tmpstr[j],gdp)) {
268 rrd_set_error("Could not parse color in '%s'",tmpstr[j]);
269 return 1;
270 }
271 tmpstr[j]='\0';
272 dprintf("- parsed color 0x%08x\n",(unsigned int)gdp->col);
273 colorfound=1;
274 }
276 dprintf("- examining '%s'\n",tmpstr);
277 j=0;
278 if (gdp->gf == GF_VRULE) {
279 sscanf(tmpstr,"%li%n",&gdp->xrule,&j);
280 if (j) dprintf("- found time: %li\n",gdp->xrule);
281 } else {
282 sscanf(tmpstr,"%lf%n",&gdp->yrule,&j);
283 if (j) dprintf("- found number: %f\n",gdp->yrule);
284 }
285 if (!j) {
286 if ((gdp->vidx=find_var(im,tmpstr))<0) {
287 rrd_set_error("Not a valid vname: %s in line %s",tmpstr,line);
288 return 1;
289 }
290 dprintf("- found vname: '%s' vidx %li\n",tmpstr,gdp->vidx);
291 }
292 /* "*eaten" is still pointing to the original location,
293 ** "*eaten +i" is pointing to the character after the color
294 ** or to the terminating '\0' in which case we're finished.
295 */
296 if (line[*eaten+i]=='\0') {
297 *eaten+=i;
298 return 0;
299 }
300 *eaten+=++i;
302 /* If a color is specified and the only remaining part is
303 ** ":STACK" then it is assumed to be the legend. An empty
304 ** legend can be specified as expected. This means the
305 ** following can be done: LINE1:x#FF0000FF::STACK
306 */
307 if (colorfound) { /* no legend if no color */
308 if (gdp->gf == GF_TICK) {
309 dprintf("- looking for optional number\n");
310 sscanf(&line[*eaten],"%lf%n",&gdp->yrule,&j);
311 if (j) {
312 dprintf("- found number %f\n",gdp->yrule);
313 (*eaten)+=j;
314 if (gdp->yrule > 1.0 || gdp->yrule < -1.0) {
315 rrd_set_error("Tick factor should be <= 1.0");
316 return 1;
317 }
318 if (line[*eaten] == ':')
319 (*eaten)++;
320 } else {
321 dprintf("- not found, defaulting to 0.1\n");
322 gdp->yrule=0.1;
323 return 0;
324 }
325 }
326 dprintf("- looking for optional legend\n");
327 dprintf("- in '%s'\n",&line[*eaten]);
328 if (rrd_parse_legend(line, eaten, gdp)) return 1;
329 }
331 /* PART, HRULE, VRULE and TICK cannot be stacked. We're finished */
332 if ( (gdp->gf == GF_HRULE)
333 || (gdp->gf == GF_VRULE)
334 || (gdp->gf == GF_PART)
335 || (gdp->gf == GF_TICK)
336 ) return 0;
338 if (line[*eaten]!='\0') {
339 dprintf("- still more, should be STACK\n");
340 (*eaten)++;
341 j=scan_for_col(&line[*eaten],5,tmpstr);
342 if (line[*eaten+j]!='\0') {
343 rrd_set_error("Garbage found where STACK expected");
344 return 1;
345 }
346 if (!strcmp("STACK",tmpstr)) {
347 dprintf("- found STACK\n");
348 gdp->stack=1;
349 (*eaten)+=5;
350 } else {
351 rrd_set_error("Garbage found where STACK expected");
352 return 1;
353 }
354 }
356 return 0;
357 }
359 int
360 rrd_parse_vname(char *line, unsigned int *eaten, graph_desc_t *gdp, image_desc_t *im) {
361 char tmpstr[MAX_VNAME_LEN + 10];
362 int i=0;
364 sscanf(&line[*eaten], DEF_NAM_FMT "=%n", tmpstr,&i);
365 if (!i) {
366 rrd_set_error("Cannot parse vname from '%s'",line);
367 return 1;
368 }
369 dprintf("- found candidate '%s'\n",tmpstr);
371 if ((gdp->vidx=find_var(im,tmpstr))>=0) {
372 rrd_set_error("Attempting to reuse '%s'",im->gdes[gdp->vidx].vname);
373 return 1;
374 }
375 strcpy(gdp->vname,tmpstr);
376 dprintf("- created vname '%s' vidx %lu\n", gdp->vname,im->gdes_c-1);
377 (*eaten)+=i;
378 return 0;
379 }
381 int
382 rrd_parse_def(char *line, unsigned int *eaten, graph_desc_t *gdp, image_desc_t *im) {
383 int i=0;
384 char command[7]; /* step, start, end, reduce */
385 char tmpstr[256];
386 struct rrd_time_value start_tv,end_tv;
387 time_t start_tmp=0,end_tmp=0;
388 char *parsetime_error=NULL;
390 start_tv.type = end_tv.type=ABSOLUTE_TIME;
391 start_tv.offset = end_tv.offset=0;
392 localtime_r(&gdp->start, &start_tv.tm);
393 localtime_r(&gdp->end, &end_tv.tm);
395 dprintf("- parsing '%s'\n",&line[*eaten]);
396 dprintf("- from line '%s'\n",line);
398 if (rrd_parse_vname(line,eaten,gdp,im)) return 1;
399 i=scan_for_col(&line[*eaten],254,gdp->rrd);
400 if (line[*eaten+i]!=':') {
401 rrd_set_error("Problems reading database name");
402 return 1;
403 }
404 (*eaten)+=++i;
405 dprintf("- using file '%s'\n",gdp->rrd);
407 i=0;
408 sscanf(&line[*eaten], DS_NAM_FMT ":%n", gdp->ds_nam,&i);
409 if (!i) {
410 rrd_set_error("Cannot parse DS in '%s'",line);
411 return 1;
412 }
413 (*eaten)+=i;
414 dprintf("- using DS '%s'\n",gdp->ds_nam);
416 if (rrd_parse_CF(line,eaten,gdp,&gdp->cf)) return 1;
417 gdp->cf_reduce = gdp->cf;
419 if (line[*eaten]=='\0') return 0;
421 while (1) {
422 dprintf("- optional parameter follows: %s\n", &line[*eaten]);
423 i=0;
424 sscanf(&line[*eaten], "%6[a-z]=%n", command, &i);
425 if (!i) {
426 rrd_set_error("Parse error in '%s'",line);
427 return 1;
428 }
429 (*eaten)+=i;
430 dprintf("- processing '%s'\n",command);
431 if (!strcmp("reduce",command)) {
432 if (rrd_parse_CF(line,eaten,gdp,&gdp->cf_reduce)) return 1;
433 if (line[*eaten] != '\0')
434 (*eaten)--;
435 } else if (!strcmp("step",command)) {
436 i=0;
437 sscanf(&line[*eaten],"%lu%n",&gdp->step,&i);
438 (*eaten)+=i;
439 dprintf("- using step %lu\n",gdp->step);
440 } else if (!strcmp("start",command)) {
441 i=scan_for_col(&line[*eaten],255,tmpstr);
442 (*eaten)+=i;
443 if ((parsetime_error = parsetime(tmpstr, &start_tv))) {
444 rrd_set_error( "start time: %s", parsetime_error );
445 return 1;
446 }
447 dprintf("- done parsing: '%s'\n",&line[*eaten]);
448 } else if (!strcmp("end",command)) {
449 i=scan_for_col(&line[*eaten],255,tmpstr);
450 (*eaten)+=i;
451 if ((parsetime_error = parsetime(tmpstr, &end_tv))) {
452 rrd_set_error( "end time: %s", parsetime_error );
453 return 1;
454 }
455 dprintf("- done parsing: '%s'\n",&line[*eaten]);
456 } else {
457 rrd_set_error("Parse error in '%s'",line);
458 return 1;
459 }
460 if (line[*eaten]=='\0') break;
461 if (line[*eaten]!=':') {
462 dprintf("- Expected to see end of string but got '%s'\n",\
463 &line[*eaten]);
464 rrd_set_error("Parse error in '%s'",line);
465 return 1;
466 }
467 (*eaten)++;
468 }
469 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
470 /* error string is set in parsetime.c */
471 return 1;
472 }
473 if (start_tmp < 3600*24*365*10) {
474 rrd_set_error("the first entry to fetch should be "
475 "after 1980 (%ld)",start_tmp);
476 return 1;
477 }
479 if (end_tmp < start_tmp) {
480 rrd_set_error("start (%ld) should be less than end (%ld)",
481 start_tmp, end_tmp);
482 return 1;
483 }
485 gdp->start = start_tmp;
486 gdp->end = end_tmp;
488 dprintf("- start time %lu\n",gdp->start);
489 dprintf("- end time %lu\n",gdp->end);
491 return 0;
492 }
494 int
495 rrd_parse_vdef(char *line, unsigned int *eaten, graph_desc_t *gdp, image_desc_t *im) {
496 char tmpstr[MAX_VNAME_LEN+1]; /* vname\0 */
497 int i=0;
499 dprintf("- parsing '%s'\n",&line[*eaten]);
500 if (rrd_parse_vname(line,eaten,gdp,im)) return 1;
502 sscanf(&line[*eaten], DEF_NAM_FMT ",%n", tmpstr,&i);
503 if (!i) {
504 rrd_set_error("Cannot parse line '%s'",line);
505 return 1;
506 }
507 if ((gdp->vidx=find_var(im,tmpstr))<0) {
508 rrd_set_error("Not a valid vname: %s in line %s",tmpstr,line);
509 return 1;
510 }
511 if ( im->gdes[gdp->vidx].gf != GF_DEF
512 && im->gdes[gdp->vidx].gf != GF_CDEF) {
513 rrd_set_error("variable '%s' not DEF nor "
514 "CDEF in VDEF '%s'", tmpstr,gdp->vname);
515 return 1;
516 }
517 dprintf("- found vname: '%s' vidx %li\n",tmpstr,gdp->vidx);
518 (*eaten)+=i;
520 dprintf("- calling vdef_parse with param '%s'\n",&line[*eaten]);
521 vdef_parse(gdp,&line[*eaten]);
522 while (line[*eaten]!='\0'&&line[*eaten]!=':')
523 (*eaten)++;
525 return 0;
526 }
528 int
529 rrd_parse_cdef(char *line, unsigned int *eaten, graph_desc_t *gdp, image_desc_t *im) {
530 dprintf("- parsing '%s'\n",&line[*eaten]);
531 if (rrd_parse_vname(line,eaten,gdp,im)) return 1;
532 if ((gdp->rpnp = rpn_parse(
533 (void *)im,
534 &line[*eaten],
535 &find_var_wrapper)
536 )==NULL) {
537 rrd_set_error("invalid rpn expression in: %s",&line[*eaten]);
538 return 1;
539 };
540 while (line[*eaten]!='\0'&&line[*eaten]!=':')
541 (*eaten)++;
542 return 0;
543 }
545 void
546 rrd_graph_script(int argc, char *argv[], image_desc_t *im, int optno) {
547 int i;
549 for (i=optind+optno;i<argc;i++) {
550 graph_desc_t *gdp;
551 unsigned int eaten=0;
553 if (gdes_alloc(im)) return; /* the error string is already set */
554 gdp = &im->gdes[im->gdes_c-1];
555 #ifdef DEBUG
556 gdp->debug = 1;
557 #endif
559 if (rrd_parse_find_gf(argv[i],&eaten,gdp)) return;
561 switch (gdp->gf) {
562 case GF_SHIFT: /* vname:value */
563 if (rrd_parse_shift(argv[i],&eaten,gdp,im)) return;
564 break;
565 case GF_XPORT:
566 if (rrd_parse_xport(argv[i],&eaten,gdp,im)) return;
567 break;
568 case GF_PRINT: /* vname:CF:format -or- vname:format */
569 case GF_GPRINT: /* vname:CF:format -or- vname:format */
570 if (rrd_parse_print(argv[i],&eaten,gdp,im)) return;
571 break;
572 case GF_COMMENT: /* text */
573 if (rrd_parse_legend(argv[i],&eaten,gdp)) return;
574 break;
575 case GF_PART: /* value[#color[:legend]] */
576 case GF_VRULE: /* value#color[:legend] */
577 case GF_HRULE: /* value#color[:legend] */
578 case GF_LINE: /* vname-or-value[#color[:legend]][:STACK] */
579 case GF_AREA: /* vname-or-value[#color[:legend]][:STACK] */
580 case GF_STACK: /* vname-or-value[#color[:legend]] */
581 case GF_TICK: /* vname#color[:num[:legend]] */
582 if (rrd_parse_PVHLAST(argv[i],&eaten,gdp,im)) return;
583 break;
584 /* data acquisition */
585 case GF_DEF: /* vname=x:DS:CF:[:step=#][:start=#][:end=#] */
586 if (rrd_parse_def(argv[i],&eaten,gdp,im)) return;
587 break;
588 case GF_CDEF: /* vname=rpn-expression */
589 if (rrd_parse_cdef(argv[i],&eaten,gdp,im)) return;
590 break;
591 case GF_VDEF: /* vname=rpn-expression */
592 if (rrd_parse_vdef(argv[i],&eaten,gdp,im)) return;
593 break;
594 }
595 if (gdp->debug) {
596 dprintf("used %i out of %i chars\n",eaten,strlen(argv[i]));
597 dprintf("parsed line: '%s'\n",argv[i]);
598 dprintf("remaining: '%s'\n",&argv[i][eaten]);
599 if (eaten >= strlen(argv[i]))
600 dprintf("Command finished successfully\n");
601 }
602 if (eaten < strlen(argv[i])) {
603 rrd_set_error("Garbage '%s' after command:\n%s",
604 &argv[i][eaten],argv[i]);
605 return;
606 }
607 }
608 }