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 *);
17 int rrd_parse_print (char *, unsigned int *, graph_desc_t *, image_desc_t *);
18 int rrd_parse_PVHLAST (char *, unsigned int *, graph_desc_t *, image_desc_t *);
19 int rrd_parse_vname (char *, unsigned int *, graph_desc_t *, image_desc_t *);
20 int rrd_parse_def (char *, unsigned int *, graph_desc_t *, image_desc_t *);
21 int rrd_parse_vdef (char *, unsigned int *, graph_desc_t *, image_desc_t *);
22 int rrd_parse_cdef (char *, unsigned int *, graph_desc_t *, image_desc_t *);
26 int
27 rrd_parse_find_gf(char *line, unsigned int *eaten, graph_desc_t *gdp) {
28 char funcname[11],c1=0,c2=0;
29 int i=0;
31 sscanf(&line[*eaten], "DEBUG%n", &i);
32 if (i) {
33 gdp->debug=1;
34 (*eaten)+=i;
35 i=0;
36 dprintf("Scanning line '%s'\n",&line[*eaten]);
37 }
38 sscanf(&line[*eaten], "%10[A-Z]%n%c%c", funcname, &i, &c1, &c2);
39 if (!i) {
40 rrd_set_error("Could not make sense out of '%s'",line);
41 return 1;
42 }
43 if ((int)(gdp->gf=gf_conv(funcname)) == -1) {
44 rrd_set_error("'%s' is not a valid function name", funcname);
45 return 1;
46 }
47 if (gdp->gf == GF_LINE) {
48 if (c1 < '1' || c1 > '3' || c2 != ':') {
49 rrd_set_error("Malformed LINE command: %s",line);
50 return 1;
51 }
52 gdp->linewidth=c1-'0';
53 i++;
54 } else {
55 if (c1 != ':') {
56 rrd_set_error("Malformed %s command: %s",funcname,line);
57 return 1;
58 }
59 }
60 *eaten+=++i;
61 return 0;
62 }
64 int
65 rrd_parse_legend(char *line, unsigned int *eaten, graph_desc_t *gdp) {
66 int i;
68 dprintf("- examining '%s'\n",&line[*eaten]);
70 i=scan_for_col(&line[*eaten],FMT_LEG_LEN,gdp->legend);
72 *eaten += i;
73 if (line[*eaten]!='\0' && line[*eaten]!=':') {
74 rrd_set_error("Legend too long");
75 return 1;
76 } else {
77 dprintf("- found legend '%s'\n", gdp->legend);
78 return 0;
79 }
80 }
82 int
83 rrd_parse_color(char *string, graph_desc_t *gdp) {
84 unsigned int r=0,g=0,b=0,a=0;
85 int i1=0,i2=0,i3=0;
87 if (string[0] != '#') return 1;
88 sscanf(string, "#%02x%02x%02x%n%02x%n%*s%n",
89 &r,&g,&b,&i1,&a,&i2,&i3);
91 if (i3) return 1; /* garbage after color */
92 if (!i2) a=0xFF;
93 if (!i1) return 1; /* no color after '#' */
94 gdp->col = r<<24|g<<16|b<<8|a;
95 return 0;
96 }
98 int
99 rrd_parse_CF(char *line, unsigned int *eaten, graph_desc_t *gdp) {
100 char symname[CF_NAM_SIZE];
101 int i=0;
103 sscanf(&line[*eaten], CF_NAM_FMT "%n", symname,&i);
104 if ((!i)||((line[*eaten+i]!='\0')&&(line[*eaten+i]!=':'))) {
105 rrd_set_error("Cannot parse CF in '%s'",line);
106 return 1;
107 }
108 (*eaten)+=i;
109 dprintf("- using CF '%s'\n",symname);
111 if ((int)(gdp->cf = cf_conv(symname))==-1) {
112 rrd_set_error("Unknown CF '%s' in '%s'",symname,line);
113 return 1;
114 }
116 if (line[*eaten]!='\0') (*eaten)++;
117 return 0;
118 }
120 /* Parsing old-style xPRINT and new-style xPRINT */
121 int
122 rrd_parse_print(char *line, unsigned int *eaten, graph_desc_t *gdp, image_desc_t *im) {
123 /* vname:CF:format in case of DEF-based vname
124 ** vname:CF:format in case of CDEF-based vname
125 ** vname:format in case of VDEF-based vname
126 */
127 char tmpstr[MAX_VNAME_LEN+1];
128 int i=0;
130 sscanf(&line[*eaten], DEF_NAM_FMT ":%n", tmpstr,&i);
131 if (!i) {
132 rrd_set_error("Could not parse line '%s'",line);
133 return 1;
134 }
135 (*eaten)+=i;
136 dprintf("- Found candidate vname '%s'\n",tmpstr);
138 if ((gdp->vidx=find_var(im,tmpstr))<0) {
139 rrd_set_error("Not a valid vname: %s in line %s",tmpstr,line);
140 return 1;
141 }
142 switch (im->gdes[gdp->vidx].gf) {
143 case GF_DEF:
144 case GF_CDEF:
145 dprintf("- vname is of type DEF or CDEF, looking for CF\n");
146 if (rrd_parse_CF(line,eaten,gdp)) return 1;
147 break;
148 case GF_VDEF:
149 dprintf("- vname is of type VDEF\n");
150 break;
151 default:
152 rrd_set_error("Encountered unknown type variable '%s'",tmpstr);
153 return 1;
154 }
156 if (rrd_parse_legend(line,eaten,gdp)) return 1;
158 /* Why is there a separate structure member "format" ??? */
159 strcpy(gdp->format,gdp->legend);
161 return 0;
162 }
164 /* Parsing of PART, VRULE, HRULE, LINE, AREA, STACK and TICK
165 ** is done in one function. Stacking STACK is silently ignored
166 ** as it is redundant. Stacking PART, VRULE, HRULE or TICK is
167 ** not allowed. The check for color doesn't need to be so strict
168 ** anymore, the user can specify the color '#00000000' and
169 ** effectively circumvent this check, so why bother.
170 **
171 ** If a number (which is valid to enter) is more than a
172 ** certain amount of characters, it is caught as an error.
173 ** While this is arguable, so is entering fixed numbers
174 ** with more than MAX_VNAME_LEN significant digits.
175 */
176 int
177 rrd_parse_PVHLAST(char *line, unsigned int *eaten, graph_desc_t *gdp, image_desc_t *im) {
178 int i,j;
179 int colorfound=0;
180 char tmpstr[MAX_VNAME_LEN + 10]; /* vname#RRGGBBAA\0 */
182 dprintf("- parsing '%s'\n",&line[*eaten]);
183 dprintf("- from line '%s'\n",line);
185 i=scan_for_col(&line[*eaten],MAX_VNAME_LEN+9,tmpstr);
186 if (line[*eaten+i]!='\0' && line[*eaten+i]!=':') {
187 rrd_set_error("Cannot parse line '%s'",line);
188 return 1;
189 }
191 j=i; while (j>0 && tmpstr[j]!='#') j--;
193 if (tmpstr[j]=='#') {
194 if (rrd_parse_color(&tmpstr[j],gdp)) {
195 rrd_set_error("Could not parse color in '%s'",tmpstr[j]);
196 return 1;
197 }
198 tmpstr[j]='\0';
199 dprintf("- parsed color 0x%08x\n",(unsigned int)gdp->col);
200 colorfound=1;
201 }
203 dprintf("- examining '%s'\n",tmpstr);
204 j=0;
205 if (gdp->gf == GF_VRULE) {
206 sscanf(tmpstr,"%li%n",&gdp->xrule,&j);
207 if (j) dprintf("- found time: %li\n",gdp->xrule);
208 } else {
209 sscanf(tmpstr,"%lf%n",&gdp->yrule,&j);
210 if (j) dprintf("- found number: %f\n",gdp->yrule);
211 }
212 if (!j) {
213 if ((gdp->vidx=find_var(im,tmpstr))<0) {
214 rrd_set_error("Not a valid vname: %s in line %s",tmpstr,line);
215 return 1;
216 }
217 dprintf("- found vname: '%s' vidx %li\n",tmpstr,gdp->vidx);
218 }
219 /* "*eaten" is still pointing to the original location,
220 ** "*eaten +i" is pointing to the character after the color
221 ** or to the terminating '\0' in which case we're finished.
222 */
223 if (line[*eaten+i]=='\0') {
224 *eaten+=i;
225 return 0;
226 }
227 *eaten+=++i;
229 /* If a color is specified and the only remaining part is
230 ** ":STACK" then it is assumed to be the legend. An empty
231 ** legend can be specified as expected. This means the
232 ** following can be done: LINE1:x#FF0000FF::STACK
233 */
234 if (colorfound) { /* no legend if no color */
235 if (gdp->gf == GF_TICK) {
236 dprintf("- looking for optional number\n");
237 sscanf(&line[*eaten],"%lf:%n",&gdp->yrule,&j);
238 if (j) {
239 dprintf("- found number %f\n",gdp->yrule);
240 (*eaten)+=j;
241 if (gdp->yrule > 1.0 || gdp->yrule < -1.0) {
242 rrd_set_error("Tick factor should be <= 1.0");
243 return 1;
244 }
245 } else {
246 dprintf("- not found, defaulting to 0.1\n");
247 gdp->yrule=0.1;
248 return 0;
249 }
250 }
251 dprintf("- looking for optional legend\n");
252 dprintf("- in '%s'\n",&line[*eaten]);
253 if (rrd_parse_legend(line, eaten, gdp)) return 1;
254 }
256 /* PART, HRULE, VRULE and TICK cannot be stacked. We're finished */
257 if ( (gdp->gf == GF_HRULE)
258 || (gdp->gf == GF_VRULE)
259 || (gdp->gf == GF_PART)
260 || (gdp->gf == GF_TICK)
261 ) return 0;
263 if (line[*eaten]!='\0') {
264 dprintf("- still more, should be STACK\n");
265 (*eaten)++;
266 j=scan_for_col(&line[*eaten],5,tmpstr);
267 if (line[*eaten+j]!='\0') {
268 rrd_set_error("Garbage found where STACK expected");
269 return 1;
270 }
271 if (!strcmp("STACK",tmpstr)) {
272 dprintf("- found STACK\n");
273 gdp->stack=1;
274 (*eaten)+=5;
275 } else {
276 rrd_set_error("Garbage found where STACK expected");
277 return 1;
278 }
279 }
281 return 0;
282 }
284 int
285 rrd_parse_vname(char *line, unsigned int *eaten, graph_desc_t *gdp, image_desc_t *im) {
286 char tmpstr[MAX_VNAME_LEN + 10];
287 int i=0;
289 sscanf(&line[*eaten], DEF_NAM_FMT "=%n", tmpstr,&i);
290 if (!i) {
291 rrd_set_error("Cannot parse vname from '%s'",line);
292 return 1;
293 }
294 dprintf("- found candidate '%s'\n",tmpstr);
296 if ((gdp->vidx=find_var(im,tmpstr))>=0) {
297 rrd_set_error("Attempting to reuse '%s'",im->gdes[gdp->vidx].vname);
298 return 1;
299 }
300 strcpy(gdp->vname,tmpstr);
301 dprintf("- created vname '%s' vidx %lu\n", gdp->vname,im->gdes_c-1);
302 (*eaten)+=i;
303 return 0;
304 }
306 int
307 rrd_parse_def(char *line, unsigned int *eaten, graph_desc_t *gdp, image_desc_t *im) {
308 int i=0;
309 char command[6]; /* step, start, end */
310 char tmpstr[256];
311 struct rrd_time_value start_tv,end_tv;
312 time_t start_tmp=0,end_tmp=0;
313 char *parsetime_error=NULL;
315 start_tv.type = end_tv.type=ABSOLUTE_TIME;
316 start_tv.offset = end_tv.offset=0;
317 localtime_r(&gdp->start, &start_tv.tm);
318 localtime_r(&gdp->end, &end_tv.tm);
320 dprintf("- parsing '%s'\n",&line[*eaten]);
321 dprintf("- from line '%s'\n",line);
323 if (rrd_parse_vname(line,eaten,gdp,im)) return 1;
324 i=scan_for_col(&line[*eaten],254,gdp->rrd);
325 if (line[*eaten+i]!=':') {
326 rrd_set_error("Problems reading database name");
327 return 1;
328 }
329 (*eaten)+=++i;
330 dprintf("- using file '%s'\n",gdp->rrd);
332 i=0;
333 sscanf(&line[*eaten], DS_NAM_FMT ":%n", gdp->ds_nam,&i);
334 if (!i) {
335 rrd_set_error("Cannot parse DS in '%s'",line);
336 return 1;
337 }
338 (*eaten)+=i;
339 dprintf("- using DS '%s'\n",gdp->ds_nam);
341 if (rrd_parse_CF(line,eaten,gdp)) return 1;
343 if (line[*eaten]=='\0') return 0;
345 while (1) {
346 dprintf("- optional parameter follows: %s\n", &line[*eaten]);
347 i=0;
348 sscanf(&line[*eaten], "%5[a-z]=%n", command, &i);
349 if (!i) {
350 rrd_set_error("Parse error in '%s'",line);
351 return 1;
352 }
353 (*eaten)+=i;
354 dprintf("- processing '%s'\n",command);
355 if (!strcmp("step",command)) {
356 i=0;
357 sscanf(&line[*eaten],"%lu%n",&gdp->step,&i);
358 (*eaten)+=i;
359 dprintf("- using step %lu\n",gdp->step);
360 } else if (!strcmp("start",command)) {
361 i=scan_for_col(&line[*eaten],255,tmpstr);
362 (*eaten)+=i;
363 if ((parsetime_error = parsetime(tmpstr, &start_tv))) {
364 rrd_set_error( "start time: %s", parsetime_error );
365 return 1;
366 }
367 dprintf("- done parsing: '%s'\n",&line[*eaten]);
368 } else if (!strcmp("end",command)) {
369 i=scan_for_col(&line[*eaten],255,tmpstr);
370 (*eaten)+=i;
371 if ((parsetime_error = parsetime(tmpstr, &end_tv))) {
372 rrd_set_error( "end time: %s", parsetime_error );
373 return 1;
374 }
375 dprintf("- done parsing: '%s'\n",&line[*eaten]);
376 } else {
377 rrd_set_error("Parse error in '%s'",line);
378 return 1;
379 }
380 if (line[*eaten]=='\0') break;
381 if (line[*eaten]!=':') {
382 dprintf("- Expected to see end of string but got '%s'\n",\
383 &line[*eaten]);
384 rrd_set_error("Parse error in '%s'",line);
385 return 1;
386 }
387 (*eaten)++;
388 }
389 if (proc_start_end(&start_tv,&end_tv,&start_tmp,&end_tmp) == -1){
390 /* error string is set in parsetime.c */
391 return 1;
392 }
393 if (start_tmp < 3600*24*365*10) {
394 rrd_set_error("the first entry to fetch should be "
395 "after 1980 (%ld)",start_tmp);
396 return 1;
397 }
399 if (end_tmp < start_tmp) {
400 rrd_set_error("start (%ld) should be less than end (%ld)",
401 start_tmp, end_tmp);
402 return 1;
403 }
405 gdp->start = start_tmp;
406 gdp->end = end_tmp;
408 dprintf("- start time %lu\n",gdp->start);
409 dprintf("- end time %lu\n",gdp->end);
411 return 0;
412 }
414 int
415 rrd_parse_vdef(char *line, unsigned int *eaten, graph_desc_t *gdp, image_desc_t *im) {
416 char tmpstr[MAX_VNAME_LEN+1]; /* vname\0 */
417 int i=0;
419 dprintf("- parsing '%s'\n",&line[*eaten]);
420 if (rrd_parse_vname(line,eaten,gdp,im)) return 1;
422 sscanf(&line[*eaten], DEF_NAM_FMT ",%n", tmpstr,&i);
423 if (!i) {
424 rrd_set_error("Cannot parse line '%s'",line);
425 return 1;
426 }
427 if ((gdp->vidx=find_var(im,tmpstr))<0) {
428 rrd_set_error("Not a valid vname: %s in line %s",tmpstr,line);
429 return 1;
430 }
431 if ( im->gdes[gdp->vidx].gf != GF_DEF
432 && im->gdes[gdp->vidx].gf != GF_CDEF) {
433 rrd_set_error("variable '%s' not DEF nor "
434 "CDEF in VDEF '%s'", tmpstr,gdp->vname);
435 return 1;
436 }
437 dprintf("- found vname: '%s' vidx %li\n",tmpstr,gdp->vidx);
438 (*eaten)+=i;
440 dprintf("- calling vdef_parse with param '%s'\n",&line[*eaten]);
441 vdef_parse(gdp,&line[*eaten]);
442 while (line[*eaten]!='\0'&&line[*eaten]!=':')
443 (*eaten)++;
445 return 0;
446 }
448 int
449 rrd_parse_cdef(char *line, unsigned int *eaten, graph_desc_t *gdp, image_desc_t *im) {
450 dprintf("- parsing '%s'\n",&line[*eaten]);
451 if (rrd_parse_vname(line,eaten,gdp,im)) return 1;
452 if ((gdp->rpnp = rpn_parse(
453 (void *)im,
454 &line[*eaten],
455 &find_var_wrapper)
456 )==NULL) {
457 rrd_set_error("invalid rpn expression in: %s",&line[*eaten]);
458 return 1;
459 };
460 while (line[*eaten]!='\0'&&line[*eaten]!=':')
461 (*eaten)++;
462 return 0;
463 }
465 void
466 rrd_graph_script(int argc, char *argv[], image_desc_t *im) {
467 int i;
469 for (i=optind+1;i<argc;i++) {
470 graph_desc_t *gdp;
471 unsigned int eaten=0;
473 if (gdes_alloc(im)) return; /* the error string is already set */
474 gdp = &im->gdes[im->gdes_c-1];
475 #ifdef DEBUG
476 gdp->debug = 1;
477 #endif
479 if (rrd_parse_find_gf(argv[i],&eaten,gdp)) return;
481 switch (gdp->gf) {
482 #if 0
483 /* future command */
484 case GF_SHIFT: vname:value
485 #endif
486 case GF_XPORT:
487 break;
488 case GF_PRINT: /* vname:CF:format -or- vname:format */
489 case GF_GPRINT: /* vname:CF:format -or- vname:format */
490 if (rrd_parse_print(argv[i],&eaten,gdp,im)) return;
491 break;
492 case GF_COMMENT: /* text */
493 if (rrd_parse_legend(argv[i],&eaten,gdp)) return;
494 break;
495 case GF_PART: /* value[#color[:legend]] */
496 case GF_VRULE: /* value#color[:legend] */
497 case GF_HRULE: /* value#color[:legend] */
498 case GF_LINE: /* vname-or-value[#color[:legend]][:STACK] */
499 case GF_AREA: /* vname-or-value[#color[:legend]][:STACK] */
500 case GF_STACK: /* vname-or-value[#color[:legend]] */
501 case GF_TICK: /* vname#color[:num[:legend]] */
502 if (rrd_parse_PVHLAST(argv[i],&eaten,gdp,im)) return;
503 break;
504 /* data acquisition */
505 case GF_DEF: /* vname=x:DS:CF:[:step=#][:start=#][:end=#] */
506 if (rrd_parse_def(argv[i],&eaten,gdp,im)) return;
507 break;
508 case GF_CDEF: /* vname=rpn-expression */
509 if (rrd_parse_cdef(argv[i],&eaten,gdp,im)) return;
510 break;
511 case GF_VDEF: /* vname=rpn-expression */
512 if (rrd_parse_vdef(argv[i],&eaten,gdp,im)) return;
513 break;
514 }
515 if (gdp->debug) {
516 dprintf("used %i out of %i chars\n",eaten,strlen(argv[i]));
517 dprintf("parsed line: '%s'\n",argv[i]);
518 dprintf("remaining: '%s'\n",&argv[i][eaten]);
519 if (eaten >= strlen(argv[i]))
520 dprintf("Command finished successfully\n");
521 }
522 if (eaten < strlen(argv[i])) {
523 rrd_set_error("Garbage '%s' after command:\n%s",
524 &argv[i][eaten],argv[i]);
525 return;
526 }
527 }
528 }