1 /**
2 * libcollectdclient - src/libcollectdclient/client.c
3 * Copyright (C) 2008 Florian octo Forster
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; only version 2 of the License is applicable.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 *
18 * Authors:
19 * Florian octo Forster <octo at verplant.org>
20 **/
22 #if HAVE_CONFIG_H
23 # include "config.h"
24 #endif
26 /* Set to C99 and POSIX code */
27 #if COLLECT_STANDARDS
28 # include "standards.h"
29 #endif /* COLLECT_STANDARDS */
31 #if !defined(__GNUC__) || !__GNUC__
32 # define __attribute__(x) /**/
33 #endif
35 #include "lcc_features.h"
37 #include <stdlib.h>
38 #include <stdio.h>
39 #include <unistd.h>
40 #include <sys/types.h>
41 #include <sys/socket.h>
42 #include <sys/un.h>
43 #include <string.h>
44 #include <assert.h>
45 #include <errno.h>
46 #include <math.h>
47 #include <netdb.h>
49 #include "client.h"
51 /* NI_MAXHOST has been obsoleted by RFC 3493 which is a reason for SunOS 5.11
52 * to no longer define it. We'll use the old, RFC 2553 value here. */
53 #ifndef NI_MAXHOST
54 # define NI_MAXHOST 1025
55 #endif
57 /* OpenBSD doesn't have EPROTO, FreeBSD doesn't have EILSEQ. Oh what joy! */
58 #ifndef EILSEQ
59 # ifdef EPROTO
60 # define EILSEQ EPROTO
61 # else
62 # define EILSEQ EINVAL
63 # endif
64 #endif
66 /* Secure/static macros. They work like `strcpy' and `strcat', but assure null
67 * termination. They work for static buffers only, because they use `sizeof'.
68 * The `SSTRCATF' combines the functionality of `snprintf' and `strcat' which
69 * is very useful to add formatted stuff to the end of a buffer. */
70 #define SSTRCPY(d,s) do { \
71 strncpy ((d), (s), sizeof (d)); \
72 (d)[sizeof (d) - 1] = 0; \
73 } while (0)
75 #define SSTRCAT(d,s) do { \
76 size_t _l = strlen (d); \
77 strncpy ((d) + _l, (s), sizeof (d) - _l); \
78 (d)[sizeof (d) - 1] = 0; \
79 } while (0)
81 #define SSTRCATF(d, ...) do { \
82 char _b[sizeof (d)]; \
83 snprintf (_b, sizeof (_b), __VA_ARGS__); \
84 _b[sizeof (_b) - 1] = 0; \
85 SSTRCAT ((d), _b); \
86 } while (0)
89 #define LCC_SET_ERRSTR(c, ...) do { \
90 snprintf ((c)->errbuf, sizeof ((c)->errbuf), __VA_ARGS__); \
91 (c)->errbuf[sizeof ((c)->errbuf) - 1] = 0; \
92 } while (0)
94 #if COLLECT_DEBUG
95 # define LCC_DEBUG(...) printf (__VA_ARGS__)
96 #else
97 # define LCC_DEBUG(...) /**/
98 #endif
100 /*
101 * Types
102 */
103 struct lcc_connection_s
104 {
105 FILE *fh;
106 char errbuf[1024];
107 };
109 struct lcc_response_s
110 {
111 int status;
112 char message[1024];
113 char **lines;
114 size_t lines_num;
115 };
116 typedef struct lcc_response_s lcc_response_t;
118 /*
119 * Private functions
120 */
121 /* Even though Posix requires "strerror_r" to return an "int",
122 * some systems (e.g. the GNU libc) return a "char *" _and_
123 * ignore the second argument ... -tokkee */
124 char *sstrerror (int errnum, char *buf, size_t buflen)
125 {
126 buf[0] = 0;
128 #if !HAVE_STRERROR_R
129 snprintf (buf, buflen "Error #%i; strerror_r is not available.", errnum);
130 /* #endif !HAVE_STRERROR_R */
132 #elif STRERROR_R_CHAR_P
133 {
134 char *temp;
135 temp = strerror_r (errnum, buf, buflen);
136 if (buf[0] == 0)
137 {
138 if ((temp != NULL) && (temp != buf) && (temp[0] != 0))
139 strncpy (buf, temp, buflen);
140 else
141 strncpy (buf, "strerror_r did not return "
142 "an error message", buflen);
143 }
144 }
145 /* #endif STRERROR_R_CHAR_P */
147 #else
148 if (strerror_r (errnum, buf, buflen) != 0)
149 {
150 snprintf (buf, buflen, "Error #%i; "
151 "Additionally, strerror_r failed.",
152 errnum);
153 }
154 #endif /* STRERROR_R_CHAR_P */
156 buf[buflen - 1] = 0;
158 return (buf);
159 } /* char *sstrerror */
161 static int lcc_set_errno (lcc_connection_t *c, int err) /* {{{ */
162 {
163 if (c == NULL)
164 return (-1);
166 sstrerror (err, c->errbuf, sizeof (c->errbuf));
167 c->errbuf[sizeof (c->errbuf) - 1] = 0;
169 return (0);
170 } /* }}} int lcc_set_errno */
172 /* lcc_strdup: Since `strdup' is an XSI extension, we provide our own version
173 * here. */
174 __attribute__((malloc, nonnull (1)))
175 static char *lcc_strdup (const char *str) /* {{{ */
176 {
177 size_t strsize;
178 char *ret;
180 strsize = strlen (str) + 1;
181 ret = (char *) malloc (strsize);
182 if (ret != NULL)
183 memcpy (ret, str, strsize);
184 return (ret);
185 } /* }}} char *lcc_strdup */
187 __attribute__((nonnull (1, 2)))
188 static char *lcc_strescape (char *dest, const char *src, size_t dest_size) /* {{{ */
189 {
190 size_t dest_pos;
191 size_t src_pos;
193 dest_pos = 0;
194 src_pos = 0;
196 assert (dest_size >= 3);
198 dest[dest_pos] = '"';
199 dest_pos++;
201 while (42)
202 {
203 if ((dest_pos == (dest_size - 2))
204 || (src[src_pos] == 0))
205 break;
207 if ((src[src_pos] == '"') || (src[src_pos] == '\\'))
208 {
209 /* Check if there is enough space for both characters.. */
210 if (dest_pos == (dest_size - 3))
211 break;
213 dest[dest_pos] = '\\';
214 dest_pos++;
215 }
217 dest[dest_pos] = src[src_pos];
218 dest_pos++;
219 src_pos++;
220 }
222 assert (dest_pos <= (dest_size - 2));
224 dest[dest_pos] = '"';
225 dest_pos++;
227 dest[dest_pos] = 0;
228 dest_pos++;
229 src_pos++;
231 return (dest);
232 } /* }}} char *lcc_strescape */
234 /* lcc_chomp: Removes all control-characters at the end of a string. */
235 static void lcc_chomp (char *str) /* {{{ */
236 {
237 size_t str_len;
239 str_len = strlen (str);
240 while (str_len > 0)
241 {
242 if (str[str_len - 1] >= 32)
243 break;
244 str[str_len - 1] = 0;
245 str_len--;
246 }
247 } /* }}} void lcc_chomp */
249 static void lcc_response_free (lcc_response_t *res) /* {{{ */
250 {
251 size_t i;
253 if (res == NULL)
254 return;
256 for (i = 0; i < res->lines_num; i++)
257 free (res->lines[i]);
258 free (res->lines);
259 res->lines = NULL;
260 } /* }}} void lcc_response_free */
262 static int lcc_send (lcc_connection_t *c, const char *command) /* {{{ */
263 {
264 int status;
266 LCC_DEBUG ("send: --> %s\n", command);
268 status = fprintf (c->fh, "%s\r\n", command);
269 if (status < 0)
270 {
271 lcc_set_errno (c, errno);
272 return (-1);
273 }
275 return (0);
276 } /* }}} int lcc_send */
278 static int lcc_receive (lcc_connection_t *c, /* {{{ */
279 lcc_response_t *ret_res)
280 {
281 lcc_response_t res;
282 char *ptr;
283 char buffer[4096];
284 size_t i;
286 memset (&res, 0, sizeof (res));
288 /* Read the first line, containing the status and a message */
289 ptr = fgets (buffer, sizeof (buffer), c->fh);
290 if (ptr == NULL)
291 {
292 lcc_set_errno (c, errno);
293 return (-1);
294 }
295 lcc_chomp (buffer);
296 LCC_DEBUG ("receive: <-- %s\n", buffer);
298 /* Convert the leading status to an integer and make `ptr' to point to the
299 * beginning of the message. */
300 ptr = NULL;
301 errno = 0;
302 res.status = strtol (buffer, &ptr, 0);
303 if ((errno != 0) || (ptr == &buffer[0]))
304 {
305 lcc_set_errno (c, errno);
306 return (-1);
307 }
309 /* Skip white spaces after the status number */
310 while ((*ptr == ' ') || (*ptr == '\t'))
311 ptr++;
313 /* Now copy the message. */
314 strncpy (res.message, ptr, sizeof (res.message));
315 res.message[sizeof (res.message) - 1] = 0;
317 /* Error or no lines follow: We're done. */
318 if (res.status <= 0)
319 {
320 memcpy (ret_res, &res, sizeof (res));
321 return (0);
322 }
324 /* Allocate space for the char-pointers */
325 res.lines_num = (size_t) res.status;
326 res.status = 0;
327 res.lines = (char **) malloc (res.lines_num * sizeof (char *));
328 if (res.lines == NULL)
329 {
330 lcc_set_errno (c, ENOMEM);
331 return (-1);
332 }
334 /* Now receive all the lines */
335 for (i = 0; i < res.lines_num; i++)
336 {
337 ptr = fgets (buffer, sizeof (buffer), c->fh);
338 if (ptr == NULL)
339 {
340 lcc_set_errno (c, errno);
341 break;
342 }
343 lcc_chomp (buffer);
344 LCC_DEBUG ("receive: <-- %s\n", buffer);
346 res.lines[i] = lcc_strdup (buffer);
347 if (res.lines[i] == NULL)
348 {
349 lcc_set_errno (c, ENOMEM);
350 break;
351 }
352 }
354 /* Check if the for-loop exited with an error. */
355 if (i < res.lines_num)
356 {
357 while (i > 0)
358 {
359 i--;
360 free (res.lines[i]);
361 }
362 free (res.lines);
363 return (-1);
364 }
366 memcpy (ret_res, &res, sizeof (res));
367 return (0);
368 } /* }}} int lcc_receive */
370 static int lcc_sendreceive (lcc_connection_t *c, /* {{{ */
371 const char *command, lcc_response_t *ret_res)
372 {
373 lcc_response_t res;
374 int status;
376 if (c->fh == NULL)
377 {
378 lcc_set_errno (c, EBADF);
379 return (-1);
380 }
382 status = lcc_send (c, command);
383 if (status != 0)
384 return (status);
386 memset (&res, 0, sizeof (res));
387 status = lcc_receive (c, &res);
388 if (status == 0)
389 memcpy (ret_res, &res, sizeof (*ret_res));
391 return (status);
392 } /* }}} int lcc_sendreceive */
394 static int lcc_open_unixsocket (lcc_connection_t *c, const char *path) /* {{{ */
395 {
396 struct sockaddr_un sa;
397 int fd;
398 int status;
400 assert (c != NULL);
401 assert (c->fh == NULL);
402 assert (path != NULL);
404 /* Don't use PF_UNIX here, because it's broken on Mac OS X (10.4, possibly
405 * others). */
406 fd = socket (AF_UNIX, SOCK_STREAM, /* protocol = */ 0);
407 if (fd < 0)
408 {
409 lcc_set_errno (c, errno);
410 return (-1);
411 }
413 memset (&sa, 0, sizeof (sa));
414 sa.sun_family = AF_UNIX;
415 strncpy (sa.sun_path, path, sizeof (sa.sun_path) - 1);
417 status = connect (fd, (struct sockaddr *) &sa, sizeof (sa));
418 if (status != 0)
419 {
420 lcc_set_errno (c, errno);
421 close (fd);
422 return (-1);
423 }
425 c->fh = fdopen (fd, "r+");
426 if (c->fh == NULL)
427 {
428 lcc_set_errno (c, errno);
429 close (fd);
430 return (-1);
431 }
433 return (0);
434 } /* }}} int lcc_open_unixsocket */
436 static int lcc_open_netsocket (lcc_connection_t *c, /* {{{ */
437 const char *addr_orig)
438 {
439 struct addrinfo ai_hints;
440 struct addrinfo *ai_res;
441 struct addrinfo *ai_ptr;
442 char addr_copy[NI_MAXHOST];
443 char *addr;
444 char *port;
445 int fd;
446 int status;
448 assert (c != NULL);
449 assert (c->fh == NULL);
450 assert (addr_orig != NULL);
452 strncpy(addr_copy, addr_orig, sizeof(addr_copy));
453 addr_copy[sizeof(addr_copy) - 1] = '\0';
454 addr = addr_copy;
456 memset (&ai_hints, 0, sizeof (ai_hints));
457 ai_hints.ai_flags = 0;
458 #ifdef AI_ADDRCONFIG
459 ai_hints.ai_flags |= AI_ADDRCONFIG;
460 #endif
461 ai_hints.ai_family = AF_UNSPEC;
462 ai_hints.ai_socktype = SOCK_STREAM;
464 port = NULL;
465 if (*addr == '[') /* IPv6+port format */
466 {
467 /* `addr' is something like "[2001:780:104:2:211:24ff:feab:26f8]:12345" */
468 addr++;
470 port = strchr (addr, ']');
471 if (port == NULL)
472 {
473 LCC_SET_ERRSTR (c, "malformed address: %s", addr_orig);
474 return (-1);
475 }
476 *port = 0;
477 port++;
479 if (*port == ':')
480 port++;
481 else if (*port == 0)
482 port = NULL;
483 else
484 {
485 LCC_SET_ERRSTR (c, "garbage after address: %s", port);
486 return (-1);
487 }
488 } /* if (*addr = ']') */
489 else if (strchr (addr, '.') != NULL) /* Hostname or IPv4 */
490 {
491 port = strrchr (addr, ':');
492 if (port != NULL)
493 {
494 *port = 0;
495 port++;
496 }
497 }
499 ai_res = NULL;
500 status = getaddrinfo (addr,
501 port == NULL ? LCC_DEFAULT_PORT : port,
502 &ai_hints, &ai_res);
503 if (status != 0)
504 {
505 LCC_SET_ERRSTR (c, "getaddrinfo: %s", gai_strerror (status));
506 return (-1);
507 }
509 for (ai_ptr = ai_res; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
510 {
511 fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
512 if (fd < 0)
513 {
514 status = errno;
515 fd = -1;
516 continue;
517 }
519 status = connect (fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
520 if (status != 0)
521 {
522 status = errno;
523 close (fd);
524 fd = -1;
525 continue;
526 }
528 c->fh = fdopen (fd, "r+");
529 if (c->fh == NULL)
530 {
531 status = errno;
532 close (fd);
533 fd = -1;
534 continue;
535 }
537 assert (status == 0);
538 break;
539 } /* for (ai_ptr) */
541 if (status != 0)
542 {
543 lcc_set_errno (c, status);
544 return (-1);
545 }
547 return (0);
548 } /* }}} int lcc_open_netsocket */
550 static int lcc_open_socket (lcc_connection_t *c, const char *addr) /* {{{ */
551 {
552 int status = 0;
554 if (addr == NULL)
555 return (-1);
557 assert (c != NULL);
558 assert (c->fh == NULL);
559 assert (addr != NULL);
561 if (strncmp ("unix:", addr, strlen ("unix:")) == 0)
562 status = lcc_open_unixsocket (c, addr + strlen ("unix:"));
563 else if (addr[0] == '/')
564 status = lcc_open_unixsocket (c, addr);
565 else
566 status = lcc_open_netsocket (c, addr);
568 return (status);
569 } /* }}} int lcc_open_socket */
571 /*
572 * Public functions
573 */
574 unsigned int lcc_version (void) /* {{{ */
575 {
576 return (LCC_VERSION);
577 } /* }}} unsigned int lcc_version */
579 const char *lcc_version_string (void) /* {{{ */
580 {
581 return (LCC_VERSION_STRING);
582 } /* }}} const char *lcc_version_string */
584 const char *lcc_version_extra (void) /* {{{ */
585 {
586 return (LCC_VERSION_EXTRA);
587 } /* }}} const char *lcc_version_extra */
589 int lcc_connect (const char *address, lcc_connection_t **ret_con) /* {{{ */
590 {
591 lcc_connection_t *c;
592 int status;
594 if (address == NULL)
595 return (-1);
597 if (ret_con == NULL)
598 return (-1);
600 c = (lcc_connection_t *) malloc (sizeof (*c));
601 if (c == NULL)
602 return (-1);
603 memset (c, 0, sizeof (*c));
605 status = lcc_open_socket (c, address);
606 if (status != 0)
607 {
608 lcc_disconnect (c);
609 return (status);
610 }
612 *ret_con = c;
613 return (0);
614 } /* }}} int lcc_connect */
616 int lcc_disconnect (lcc_connection_t *c) /* {{{ */
617 {
618 if (c == NULL)
619 return (-1);
621 if (c->fh != NULL)
622 {
623 fclose (c->fh);
624 c->fh = NULL;
625 }
627 free (c);
628 return (0);
629 } /* }}} int lcc_disconnect */
631 int lcc_getval (lcc_connection_t *c, lcc_identifier_t *ident, /* {{{ */
632 size_t *ret_values_num, gauge_t **ret_values, char ***ret_values_names)
633 {
634 char ident_str[6 * LCC_NAME_LEN];
635 char ident_esc[12 * LCC_NAME_LEN];
636 char command[14 * LCC_NAME_LEN];
638 lcc_response_t res;
639 size_t values_num;
640 gauge_t *values = NULL;
641 char **values_names = NULL;
643 size_t i;
644 int status;
646 if (c == NULL)
647 return (-1);
649 if (ident == NULL)
650 {
651 lcc_set_errno (c, EINVAL);
652 return (-1);
653 }
655 /* Build a commend with an escaped version of the identifier string. */
656 status = lcc_identifier_to_string (c, ident_str, sizeof (ident_str), ident);
657 if (status != 0)
658 return (status);
660 snprintf (command, sizeof (command), "GETVAL %s",
661 lcc_strescape (ident_esc, ident_str, sizeof (ident_esc)));
662 command[sizeof (command) - 1] = 0;
664 /* Send talk to the daemon.. */
665 status = lcc_sendreceive (c, command, &res);
666 if (status != 0)
667 return (status);
669 if (res.status != 0)
670 {
671 LCC_SET_ERRSTR (c, "Server error: %s", res.message);
672 lcc_response_free (&res);
673 return (-1);
674 }
676 values_num = res.lines_num;
678 #define BAIL_OUT(e) do { \
679 lcc_set_errno (c, (e)); \
680 free (values); \
681 if (values_names != NULL) { \
682 for (i = 0; i < values_num; i++) { \
683 free (values_names[i]); \
684 } \
685 } \
686 free (values_names); \
687 lcc_response_free (&res); \
688 return (-1); \
689 } while (0)
691 /* If neither the values nor the names are requested, return here.. */
692 if ((ret_values == NULL) && (ret_values_names == NULL))
693 {
694 if (ret_values_num != NULL)
695 *ret_values_num = values_num;
696 lcc_response_free (&res);
697 return (0);
698 }
700 /* Allocate space for the values */
701 if (ret_values != NULL)
702 {
703 values = (gauge_t *) malloc (values_num * sizeof (*values));
704 if (values == NULL)
705 BAIL_OUT (ENOMEM);
706 }
708 if (ret_values_names != NULL)
709 {
710 values_names = (char **) calloc (values_num, sizeof (*values_names));
711 if (values_names == NULL)
712 BAIL_OUT (ENOMEM);
713 }
715 for (i = 0; i < res.lines_num; i++)
716 {
717 char *key;
718 char *value;
719 char *endptr;
721 key = res.lines[i];
722 value = strchr (key, '=');
723 if (value == NULL)
724 BAIL_OUT (EILSEQ);
726 *value = 0;
727 value++;
729 if (values != NULL)
730 {
731 endptr = NULL;
732 errno = 0;
733 values[i] = strtod (value, &endptr);
735 if ((endptr == value) || (errno != 0))
736 BAIL_OUT (errno);
737 }
739 if (values_names != NULL)
740 {
741 values_names[i] = lcc_strdup (key);
742 if (values_names[i] == NULL)
743 BAIL_OUT (ENOMEM);
744 }
745 } /* for (i = 0; i < res.lines_num; i++) */
747 if (ret_values_num != NULL)
748 *ret_values_num = values_num;
749 if (ret_values != NULL)
750 *ret_values = values;
751 if (ret_values_names != NULL)
752 *ret_values_names = values_names;
754 return (0);
755 } /* }}} int lcc_getval */
757 int lcc_putval (lcc_connection_t *c, const lcc_value_list_t *vl) /* {{{ */
758 {
759 char ident_str[6 * LCC_NAME_LEN];
760 char ident_esc[12 * LCC_NAME_LEN];
761 char command[1024] = "";
762 lcc_response_t res;
763 int status;
764 size_t i;
766 if ((c == NULL) || (vl == NULL) || (vl->values_len < 1)
767 || (vl->values == NULL) || (vl->values_types == NULL))
768 {
769 lcc_set_errno (c, EINVAL);
770 return (-1);
771 }
773 status = lcc_identifier_to_string (c, ident_str, sizeof (ident_str),
774 &vl->identifier);
775 if (status != 0)
776 return (status);
778 SSTRCATF (command, "PUTVAL %s",
779 lcc_strescape (ident_esc, ident_str, sizeof (ident_esc)));
781 if (vl->interval > 0)
782 SSTRCATF (command, " interval=%i", vl->interval);
784 if (vl->time > 0)
785 SSTRCATF (command, "%u", (unsigned int) vl->time);
786 else
787 SSTRCAT (command, "N");
789 for (i = 0; i < vl->values_len; i++)
790 {
791 if (vl->values_types[i] == LCC_TYPE_COUNTER)
792 SSTRCATF (command, ":%"PRIu64, vl->values[i].counter);
793 else if (vl->values_types[i] == LCC_TYPE_GAUGE)
794 {
795 if (isnan (vl->values[i].gauge))
796 SSTRCPY (command, ":U");
797 else
798 SSTRCATF (command, ":%g", vl->values[i].gauge);
799 }
800 } /* for (i = 0; i < vl->values_len; i++) */
802 status = lcc_sendreceive (c, command, &res);
803 if (status != 0)
804 return (status);
806 if (res.status != 0)
807 {
808 LCC_SET_ERRSTR (c, "Server error: %s", res.message);
809 lcc_response_free (&res);
810 return (-1);
811 }
813 lcc_response_free (&res);
814 return (0);
815 } /* }}} int lcc_putval */
817 int lcc_flush (lcc_connection_t *c, const char *plugin, /* {{{ */
818 lcc_identifier_t *ident, int timeout)
819 {
820 char command[1024] = "";
821 lcc_response_t res;
822 int status;
824 if (c == NULL)
825 {
826 lcc_set_errno (c, EINVAL);
827 return (-1);
828 }
830 SSTRCPY (command, "FLUSH");
832 if (timeout > 0)
833 SSTRCATF (command, " timeout=%i", timeout);
835 if (plugin != NULL)
836 {
837 char buffer[2 * LCC_NAME_LEN];
838 SSTRCATF (command, " plugin=%s",
839 lcc_strescape (buffer, plugin, sizeof (buffer)));
840 }
842 if (ident != NULL)
843 {
844 char ident_str[6 * LCC_NAME_LEN];
845 char ident_esc[12 * LCC_NAME_LEN];
847 status = lcc_identifier_to_string (c, ident_str, sizeof (ident_str), ident);
848 if (status != 0)
849 return (status);
851 SSTRCATF (command, " identifier=%s",
852 lcc_strescape (ident_esc, ident_str, sizeof (ident_esc)));
853 }
855 status = lcc_sendreceive (c, command, &res);
856 if (status != 0)
857 return (status);
859 if (res.status != 0)
860 {
861 LCC_SET_ERRSTR (c, "Server error: %s", res.message);
862 lcc_response_free (&res);
863 return (-1);
864 }
866 lcc_response_free (&res);
867 return (0);
868 } /* }}} int lcc_flush */
870 /* TODO: Implement lcc_putnotif */
872 int lcc_listval (lcc_connection_t *c, /* {{{ */
873 lcc_identifier_t **ret_ident, size_t *ret_ident_num)
874 {
875 lcc_response_t res;
876 size_t i;
877 int status;
879 lcc_identifier_t *ident;
880 size_t ident_num;
882 if (c == NULL)
883 return (-1);
885 if ((ret_ident == NULL) || (ret_ident_num == NULL))
886 {
887 lcc_set_errno (c, EINVAL);
888 return (-1);
889 }
891 status = lcc_sendreceive (c, "LISTVAL", &res);
892 if (status != 0)
893 return (status);
895 if (res.status != 0)
896 {
897 LCC_SET_ERRSTR (c, "Server error: %s", res.message);
898 lcc_response_free (&res);
899 return (-1);
900 }
902 ident_num = res.lines_num;
903 ident = (lcc_identifier_t *) malloc (ident_num * sizeof (*ident));
904 if (ident == NULL)
905 {
906 lcc_response_free (&res);
907 lcc_set_errno (c, ENOMEM);
908 return (-1);
909 }
911 for (i = 0; i < res.lines_num; i++)
912 {
913 char *time_str;
914 char *ident_str;
916 /* First field is the time. */
917 time_str = res.lines[i];
919 /* Set `ident_str' to the beginning of the second field. */
920 ident_str = time_str;
921 while ((*ident_str != ' ') && (*ident_str != '\t') && (*ident_str != 0))
922 ident_str++;
923 while ((*ident_str == ' ') || (*ident_str == '\t'))
924 {
925 *ident_str = 0;
926 ident_str++;
927 }
929 if (*ident_str == 0)
930 {
931 lcc_set_errno (c, EILSEQ);
932 status = -1;
933 break;
934 }
936 status = lcc_string_to_identifier (c, ident + i, ident_str);
937 if (status != 0)
938 break;
939 }
941 lcc_response_free (&res);
943 if (status != 0)
944 {
945 free (ident);
946 return (-1);
947 }
949 *ret_ident = ident;
950 *ret_ident_num = ident_num;
952 return (0);
953 } /* }}} int lcc_listval */
955 const char *lcc_strerror (lcc_connection_t *c) /* {{{ */
956 {
957 if (c == NULL)
958 return ("Invalid object");
959 return (c->errbuf);
960 } /* }}} const char *lcc_strerror */
962 int lcc_identifier_to_string (lcc_connection_t *c, /* {{{ */
963 char *string, size_t string_size, const lcc_identifier_t *ident)
964 {
965 if ((string == NULL) || (string_size < 6) || (ident == NULL))
966 {
967 lcc_set_errno (c, EINVAL);
968 return (-1);
969 }
971 if (ident->plugin_instance[0] == 0)
972 {
973 if (ident->type_instance[0] == 0)
974 snprintf (string, string_size, "%s/%s/%s",
975 ident->host,
976 ident->plugin,
977 ident->type);
978 else
979 snprintf (string, string_size, "%s/%s/%s-%s",
980 ident->host,
981 ident->plugin,
982 ident->type,
983 ident->type_instance);
984 }
985 else
986 {
987 if (ident->type_instance[0] == 0)
988 snprintf (string, string_size, "%s/%s-%s/%s",
989 ident->host,
990 ident->plugin,
991 ident->plugin_instance,
992 ident->type);
993 else
994 snprintf (string, string_size, "%s/%s-%s/%s-%s",
995 ident->host,
996 ident->plugin,
997 ident->plugin_instance,
998 ident->type,
999 ident->type_instance);
1000 }
1002 string[string_size - 1] = 0;
1003 return (0);
1004 } /* }}} int lcc_identifier_to_string */
1006 int lcc_string_to_identifier (lcc_connection_t *c, /* {{{ */
1007 lcc_identifier_t *ident, const char *string)
1008 {
1009 char *string_copy;
1010 char *host;
1011 char *plugin;
1012 char *plugin_instance;
1013 char *type;
1014 char *type_instance;
1016 string_copy = lcc_strdup (string);
1017 if (string_copy == NULL)
1018 {
1019 lcc_set_errno (c, ENOMEM);
1020 return (-1);
1021 }
1023 host = string_copy;
1024 plugin = strchr (host, '/');
1025 if (plugin == NULL)
1026 {
1027 LCC_SET_ERRSTR (c, "Malformed identifier string: %s", string);
1028 free (string_copy);
1029 return (-1);
1030 }
1031 *plugin = 0;
1032 plugin++;
1034 type = strchr (plugin, '/');
1035 if (type == NULL)
1036 {
1037 LCC_SET_ERRSTR (c, "Malformed identifier string: %s", string);
1038 free (string_copy);
1039 return (-1);
1040 }
1041 *type = 0;
1042 type++;
1044 plugin_instance = strchr (plugin, '-');
1045 if (plugin_instance != NULL)
1046 {
1047 *plugin_instance = 0;
1048 plugin_instance++;
1049 }
1051 type_instance = strchr (type, '-');
1052 if (type_instance != NULL)
1053 {
1054 *type_instance = 0;
1055 type_instance++;
1056 }
1058 memset (ident, 0, sizeof (*ident));
1060 SSTRCPY (ident->host, host);
1061 SSTRCPY (ident->plugin, plugin);
1062 if (plugin_instance != NULL)
1063 SSTRCPY (ident->plugin_instance, plugin_instance);
1064 SSTRCPY (ident->type, type);
1065 if (type_instance != NULL)
1066 SSTRCPY (ident->type_instance, type_instance);
1068 free (string_copy);
1069 return (0);
1070 } /* }}} int lcc_string_to_identifier */
1072 /* vim: set sw=2 sts=2 et fdm=marker : */