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 /* Set to C99 and POSIX code */
23 #ifndef _ISOC99_SOURCE
24 # define _ISOC99_SOURCE
25 #endif
26 #ifndef _POSIX_SOURCE
27 # define _POSIX_SOURCE
28 #endif
29 #ifndef _POSIX_C_SOURCE
30 # define _POSIX_C_SOURCE 200112L
31 #endif
32 #ifndef _XOPEN_SOURCE
33 # define _XOPEN_SOURCE 600
34 #endif
35 #ifndef _REENTRANT
36 # define _REENTRANT
37 #endif
39 /* Disable non-standard extensions */
40 #ifdef _BSD_SOURCE
41 # undef _BSD_SOURCE
42 #endif
43 #ifdef _SVID_SOURCE
44 # undef _SVID_SOURCE
45 #endif
46 #ifdef _GNU_SOURCE
47 # undef _GNU_SOURCE
48 #endif
50 #if !defined(__GNUC__) || !__GNUC__
51 # define __attribute__(x) /**/
52 #endif
54 #if HAVE_CONFIG_H
55 # include "config.h"
56 #endif
58 #include "lcc_features.h"
60 #include <stdlib.h>
61 #include <stdio.h>
62 #include <unistd.h>
63 #include <sys/types.h>
64 #include <sys/socket.h>
65 #include <sys/un.h>
66 #include <string.h>
67 #include <assert.h>
68 #include <errno.h>
69 #include <math.h>
70 #include <netdb.h>
72 #include "client.h"
74 /* NI_MAXHOST has been obsoleted by RFC 3493 which is a reason for SunOS 5.11
75 * to no longer define it. We'll use the old, RFC 2553 value here. */
76 #ifndef NI_MAXHOST
77 # define NI_MAXHOST 1025
78 #endif
80 /* OpenBSD doesn't have EPROTO, FreeBSD doesn't have EILSEQ. Oh what joy! */
81 #ifndef EILSEQ
82 # ifdef EPROTO
83 # define EILSEQ EPROTO
84 # else
85 # define EILSEQ EINVAL
86 # endif
87 #endif
89 /* Secure/static macros. They work like `strcpy' and `strcat', but assure null
90 * termination. They work for static buffers only, because they use `sizeof'.
91 * The `SSTRCATF' combines the functionality of `snprintf' and `strcat' which
92 * is very useful to add formatted stuff to the end of a buffer. */
93 #define SSTRCPY(d,s) do { \
94 strncpy ((d), (s), sizeof (d)); \
95 (d)[sizeof (d) - 1] = 0; \
96 } while (0)
98 #define SSTRCAT(d,s) do { \
99 size_t _l = strlen (d); \
100 strncpy ((d) + _l, (s), sizeof (d) - _l); \
101 (d)[sizeof (d) - 1] = 0; \
102 } while (0)
104 #define SSTRCATF(d, ...) do { \
105 char _b[sizeof (d)]; \
106 snprintf (_b, sizeof (_b), __VA_ARGS__); \
107 _b[sizeof (_b) - 1] = 0; \
108 SSTRCAT ((d), _b); \
109 } while (0)
112 #define LCC_SET_ERRSTR(c, ...) do { \
113 snprintf ((c)->errbuf, sizeof ((c)->errbuf), __VA_ARGS__); \
114 (c)->errbuf[sizeof ((c)->errbuf) - 1] = 0; \
115 } while (0)
117 #if COLLECT_DEBUG
118 # define LCC_DEBUG(...) printf (__VA_ARGS__)
119 #else
120 # define LCC_DEBUG(...) /**/
121 #endif
123 /*
124 * Types
125 */
126 struct lcc_connection_s
127 {
128 FILE *fh;
129 char errbuf[1024];
130 };
132 struct lcc_response_s
133 {
134 int status;
135 char message[1024];
136 char **lines;
137 size_t lines_num;
138 };
139 typedef struct lcc_response_s lcc_response_t;
141 /*
142 * Private functions
143 */
144 static int lcc_set_errno (lcc_connection_t *c, int err) /* {{{ */
145 {
146 if (c == NULL)
147 return (-1);
149 strerror_r (err, c->errbuf, sizeof (c->errbuf));
150 c->errbuf[sizeof (c->errbuf) - 1] = 0;
152 return (0);
153 } /* }}} int lcc_set_errno */
155 /* lcc_strdup: Since `strdup' is an XSI extension, we provide our own version
156 * here. */
157 __attribute__((malloc, nonnull (1)))
158 static char *lcc_strdup (const char *str) /* {{{ */
159 {
160 size_t strsize;
161 char *ret;
163 strsize = strlen (str) + 1;
164 ret = (char *) malloc (strsize);
165 if (ret != NULL)
166 memcpy (ret, str, strsize);
167 return (ret);
168 } /* }}} char *lcc_strdup */
170 __attribute__((nonnull (1, 2)))
171 static char *lcc_strescape (char *dest, const char *src, size_t dest_size) /* {{{ */
172 {
173 size_t dest_pos;
174 size_t src_pos;
176 dest_pos = 0;
177 src_pos = 0;
179 assert (dest_size >= 3);
181 dest[dest_pos] = '"';
182 dest_pos++;
184 while (42)
185 {
186 if ((dest_pos == (dest_size - 2))
187 || (src[src_pos] == 0))
188 break;
190 if ((src[src_pos] == '"') || (src[src_pos] == '\\'))
191 {
192 /* Check if there is enough space for both characters.. */
193 if (dest_pos == (dest_size - 3))
194 break;
196 dest[dest_pos] = '\\';
197 dest_pos++;
198 }
200 dest[dest_pos] = src[src_pos];
201 dest_pos++;
202 src_pos++;
203 }
205 assert (dest_pos <= (dest_size - 2));
207 dest[dest_pos] = '"';
208 dest_pos++;
210 dest[dest_pos] = 0;
211 dest_pos++;
212 src_pos++;
214 return (dest);
215 } /* }}} char *lcc_strescape */
217 /* lcc_chomp: Removes all control-characters at the end of a string. */
218 static void lcc_chomp (char *str) /* {{{ */
219 {
220 size_t str_len;
222 str_len = strlen (str);
223 while (str_len > 0)
224 {
225 if (str[str_len - 1] >= 32)
226 break;
227 str[str_len - 1] = 0;
228 str_len--;
229 }
230 } /* }}} void lcc_chomp */
232 static void lcc_response_free (lcc_response_t *res) /* {{{ */
233 {
234 size_t i;
236 if (res == NULL)
237 return;
239 for (i = 0; i < res->lines_num; i++)
240 free (res->lines[i]);
241 free (res->lines);
242 res->lines = NULL;
243 } /* }}} void lcc_response_free */
245 static int lcc_send (lcc_connection_t *c, const char *command) /* {{{ */
246 {
247 int status;
249 LCC_DEBUG ("send: --> %s\n", command);
251 status = fprintf (c->fh, "%s\r\n", command);
252 if (status < 0)
253 {
254 lcc_set_errno (c, errno);
255 return (-1);
256 }
258 return (0);
259 } /* }}} int lcc_send */
261 static int lcc_receive (lcc_connection_t *c, /* {{{ */
262 lcc_response_t *ret_res)
263 {
264 lcc_response_t res;
265 char *ptr;
266 char buffer[4096];
267 size_t i;
269 memset (&res, 0, sizeof (res));
271 /* Read the first line, containing the status and a message */
272 ptr = fgets (buffer, sizeof (buffer), c->fh);
273 if (ptr == NULL)
274 {
275 lcc_set_errno (c, errno);
276 return (-1);
277 }
278 lcc_chomp (buffer);
279 LCC_DEBUG ("receive: <-- %s\n", buffer);
281 /* Convert the leading status to an integer and make `ptr' to point to the
282 * beginning of the message. */
283 ptr = NULL;
284 errno = 0;
285 res.status = strtol (buffer, &ptr, 0);
286 if ((errno != 0) || (ptr == &buffer[0]))
287 {
288 lcc_set_errno (c, errno);
289 return (-1);
290 }
292 /* Skip white spaces after the status number */
293 while ((*ptr == ' ') || (*ptr == '\t'))
294 ptr++;
296 /* Now copy the message. */
297 strncpy (res.message, ptr, sizeof (res.message));
298 res.message[sizeof (res.message) - 1] = 0;
300 /* Error or no lines follow: We're done. */
301 if (res.status <= 0)
302 {
303 memcpy (ret_res, &res, sizeof (res));
304 return (0);
305 }
307 /* Allocate space for the char-pointers */
308 res.lines_num = (size_t) res.status;
309 res.status = 0;
310 res.lines = (char **) malloc (res.lines_num * sizeof (char *));
311 if (res.lines == NULL)
312 {
313 lcc_set_errno (c, ENOMEM);
314 return (-1);
315 }
317 /* Now receive all the lines */
318 for (i = 0; i < res.lines_num; i++)
319 {
320 ptr = fgets (buffer, sizeof (buffer), c->fh);
321 if (ptr == NULL)
322 {
323 lcc_set_errno (c, errno);
324 break;
325 }
326 lcc_chomp (buffer);
327 LCC_DEBUG ("receive: <-- %s\n", buffer);
329 res.lines[i] = lcc_strdup (buffer);
330 if (res.lines[i] == NULL)
331 {
332 lcc_set_errno (c, ENOMEM);
333 break;
334 }
335 }
337 /* Check if the for-loop exited with an error. */
338 if (i < res.lines_num)
339 {
340 while (i > 0)
341 {
342 i--;
343 free (res.lines[i]);
344 }
345 free (res.lines);
346 return (-1);
347 }
349 memcpy (ret_res, &res, sizeof (res));
350 return (0);
351 } /* }}} int lcc_receive */
353 static int lcc_sendreceive (lcc_connection_t *c, /* {{{ */
354 const char *command, lcc_response_t *ret_res)
355 {
356 lcc_response_t res;
357 int status;
359 if (c->fh == NULL)
360 {
361 lcc_set_errno (c, EBADF);
362 return (-1);
363 }
365 status = lcc_send (c, command);
366 if (status != 0)
367 return (status);
369 memset (&res, 0, sizeof (res));
370 status = lcc_receive (c, &res);
371 if (status == 0)
372 memcpy (ret_res, &res, sizeof (*ret_res));
374 return (status);
375 } /* }}} int lcc_sendreceive */
377 static int lcc_open_unixsocket (lcc_connection_t *c, const char *path) /* {{{ */
378 {
379 struct sockaddr_un sa;
380 int fd;
381 int status;
383 assert (c != NULL);
384 assert (c->fh == NULL);
385 assert (path != NULL);
387 /* Don't use PF_UNIX here, because it's broken on Mac OS X (10.4, possibly
388 * others). */
389 fd = socket (AF_UNIX, SOCK_STREAM, /* protocol = */ 0);
390 if (fd < 0)
391 {
392 lcc_set_errno (c, errno);
393 return (-1);
394 }
396 memset (&sa, 0, sizeof (sa));
397 sa.sun_family = AF_UNIX;
398 strncpy (sa.sun_path, path, sizeof (sa.sun_path) - 1);
400 status = connect (fd, (struct sockaddr *) &sa, sizeof (sa));
401 if (status != 0)
402 {
403 lcc_set_errno (c, errno);
404 close (fd);
405 return (-1);
406 }
408 c->fh = fdopen (fd, "r+");
409 if (c->fh == NULL)
410 {
411 lcc_set_errno (c, errno);
412 close (fd);
413 return (-1);
414 }
416 return (0);
417 } /* }}} int lcc_open_unixsocket */
419 static int lcc_open_netsocket (lcc_connection_t *c, /* {{{ */
420 const char *addr_orig)
421 {
422 struct addrinfo ai_hints;
423 struct addrinfo *ai_res;
424 struct addrinfo *ai_ptr;
425 char addr_copy[NI_MAXHOST];
426 char *addr;
427 char *port;
428 int fd;
429 int status;
431 assert (c != NULL);
432 assert (c->fh == NULL);
433 assert (addr_orig != NULL);
435 strncpy(addr_copy, addr_orig, sizeof(addr_copy));
436 addr_copy[sizeof(addr_copy) - 1] = '\0';
437 addr = addr_copy;
439 memset (&ai_hints, 0, sizeof (ai_hints));
440 ai_hints.ai_flags = 0;
441 #ifdef AI_ADDRCONFIG
442 ai_hints.ai_flags |= AI_ADDRCONFIG;
443 #endif
444 ai_hints.ai_family = AF_UNSPEC;
445 ai_hints.ai_socktype = SOCK_STREAM;
447 port = NULL;
448 if (*addr == '[') /* IPv6+port format */
449 {
450 /* `addr' is something like "[2001:780:104:2:211:24ff:feab:26f8]:12345" */
451 addr++;
453 port = strchr (addr, ']');
454 if (port == NULL)
455 {
456 LCC_SET_ERRSTR (c, "malformed address: %s", addr_orig);
457 return (-1);
458 }
459 *port = 0;
460 port++;
462 if (*port == ':')
463 port++;
464 else if (*port == 0)
465 port = NULL;
466 else
467 {
468 LCC_SET_ERRSTR (c, "garbage after address: %s", port);
469 return (-1);
470 }
471 } /* if (*addr = ']') */
472 else if (strchr (addr, '.') != NULL) /* Hostname or IPv4 */
473 {
474 port = strrchr (addr, ':');
475 if (port != NULL)
476 {
477 *port = 0;
478 port++;
479 }
480 }
482 ai_res = NULL;
483 status = getaddrinfo (addr,
484 port == NULL ? LCC_DEFAULT_PORT : port,
485 &ai_hints, &ai_res);
486 if (status != 0)
487 {
488 LCC_SET_ERRSTR (c, "getaddrinfo: %s", gai_strerror (status));
489 return (-1);
490 }
492 for (ai_ptr = ai_res; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
493 {
494 fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
495 if (fd < 0)
496 {
497 status = errno;
498 fd = -1;
499 continue;
500 }
502 status = connect (fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
503 if (status != 0)
504 {
505 status = errno;
506 close (fd);
507 fd = -1;
508 continue;
509 }
511 c->fh = fdopen (fd, "r+");
512 if (c->fh == NULL)
513 {
514 status = errno;
515 close (fd);
516 fd = -1;
517 continue;
518 }
520 assert (status == 0);
521 break;
522 } /* for (ai_ptr) */
524 if (status != 0)
525 {
526 lcc_set_errno (c, status);
527 return (-1);
528 }
530 return (0);
531 } /* }}} int lcc_open_netsocket */
533 static int lcc_open_socket (lcc_connection_t *c, const char *addr) /* {{{ */
534 {
535 int status = 0;
537 if (addr == NULL)
538 return (-1);
540 assert (c != NULL);
541 assert (c->fh == NULL);
542 assert (addr != NULL);
544 if (strncmp ("unix:", addr, strlen ("unix:")) == 0)
545 status = lcc_open_unixsocket (c, addr + strlen ("unix:"));
546 else if (addr[0] == '/')
547 status = lcc_open_unixsocket (c, addr);
548 else
549 status = lcc_open_netsocket (c, addr);
551 return (status);
552 } /* }}} int lcc_open_socket */
554 /*
555 * Public functions
556 */
557 unsigned int lcc_version (void) /* {{{ */
558 {
559 return (LCC_VERSION);
560 } /* }}} unsigned int lcc_version */
562 const char *lcc_version_string (void) /* {{{ */
563 {
564 return (LCC_VERSION_STRING);
565 } /* }}} const char *lcc_version_string */
567 const char *lcc_version_extra (void) /* {{{ */
568 {
569 return (LCC_VERSION_EXTRA);
570 } /* }}} const char *lcc_version_extra */
572 int lcc_connect (const char *address, lcc_connection_t **ret_con) /* {{{ */
573 {
574 lcc_connection_t *c;
575 int status;
577 if (address == NULL)
578 return (-1);
580 if (ret_con == NULL)
581 return (-1);
583 c = (lcc_connection_t *) malloc (sizeof (*c));
584 if (c == NULL)
585 return (-1);
586 memset (c, 0, sizeof (*c));
588 status = lcc_open_socket (c, address);
589 if (status != 0)
590 {
591 lcc_disconnect (c);
592 return (status);
593 }
595 *ret_con = c;
596 return (0);
597 } /* }}} int lcc_connect */
599 int lcc_disconnect (lcc_connection_t *c) /* {{{ */
600 {
601 if (c == NULL)
602 return (-1);
604 if (c->fh != NULL)
605 {
606 fclose (c->fh);
607 c->fh = NULL;
608 }
610 free (c);
611 return (0);
612 } /* }}} int lcc_disconnect */
614 int lcc_getval (lcc_connection_t *c, lcc_identifier_t *ident, /* {{{ */
615 size_t *ret_values_num, gauge_t **ret_values, char ***ret_values_names)
616 {
617 char ident_str[6 * LCC_NAME_LEN];
618 char ident_esc[12 * LCC_NAME_LEN];
619 char command[14 * LCC_NAME_LEN];
621 lcc_response_t res;
622 size_t values_num;
623 gauge_t *values = NULL;
624 char **values_names = NULL;
626 size_t i;
627 int status;
629 if (c == NULL)
630 return (-1);
632 if (ident == NULL)
633 {
634 lcc_set_errno (c, EINVAL);
635 return (-1);
636 }
638 /* Build a commend with an escaped version of the identifier string. */
639 status = lcc_identifier_to_string (c, ident_str, sizeof (ident_str), ident);
640 if (status != 0)
641 return (status);
643 snprintf (command, sizeof (command), "GETVAL %s",
644 lcc_strescape (ident_esc, ident_str, sizeof (ident_esc)));
645 command[sizeof (command) - 1] = 0;
647 /* Send talk to the daemon.. */
648 status = lcc_sendreceive (c, command, &res);
649 if (status != 0)
650 return (status);
652 if (res.status != 0)
653 {
654 LCC_SET_ERRSTR (c, "Server error: %s", res.message);
655 lcc_response_free (&res);
656 return (-1);
657 }
659 values_num = res.lines_num;
661 #define BAIL_OUT(e) do { \
662 lcc_set_errno (c, (e)); \
663 free (values); \
664 if (values_names != NULL) { \
665 for (i = 0; i < values_num; i++) { \
666 free (values_names[i]); \
667 } \
668 } \
669 free (values_names); \
670 lcc_response_free (&res); \
671 return (-1); \
672 } while (0)
674 /* If neither the values nor the names are requested, return here.. */
675 if ((ret_values == NULL) && (ret_values_names == NULL))
676 {
677 if (ret_values_num != NULL)
678 *ret_values_num = values_num;
679 lcc_response_free (&res);
680 return (0);
681 }
683 /* Allocate space for the values */
684 if (ret_values != NULL)
685 {
686 values = (gauge_t *) malloc (values_num * sizeof (*values));
687 if (values == NULL)
688 BAIL_OUT (ENOMEM);
689 }
691 if (ret_values_names != NULL)
692 {
693 values_names = (char **) calloc (values_num, sizeof (*values_names));
694 if (values_names == NULL)
695 BAIL_OUT (ENOMEM);
696 }
698 for (i = 0; i < res.lines_num; i++)
699 {
700 char *key;
701 char *value;
702 char *endptr;
704 key = res.lines[i];
705 value = strchr (key, '=');
706 if (value == NULL)
707 BAIL_OUT (EILSEQ);
709 *value = 0;
710 value++;
712 if (values != NULL)
713 {
714 endptr = NULL;
715 errno = 0;
716 values[i] = strtod (value, &endptr);
718 if ((endptr == value) || (errno != 0))
719 BAIL_OUT (errno);
720 }
722 if (values_names != NULL)
723 {
724 values_names[i] = lcc_strdup (key);
725 if (values_names[i] == NULL)
726 BAIL_OUT (ENOMEM);
727 }
728 } /* for (i = 0; i < res.lines_num; i++) */
730 if (ret_values_num != NULL)
731 *ret_values_num = values_num;
732 if (ret_values != NULL)
733 *ret_values = values;
734 if (ret_values_names != NULL)
735 *ret_values_names = values_names;
737 return (0);
738 } /* }}} int lcc_getval */
740 int lcc_putval (lcc_connection_t *c, const lcc_value_list_t *vl) /* {{{ */
741 {
742 char ident_str[6 * LCC_NAME_LEN];
743 char ident_esc[12 * LCC_NAME_LEN];
744 char command[1024] = "";
745 lcc_response_t res;
746 int status;
747 size_t i;
749 if ((c == NULL) || (vl == NULL) || (vl->values_len < 1)
750 || (vl->values == NULL) || (vl->values_types == NULL))
751 {
752 lcc_set_errno (c, EINVAL);
753 return (-1);
754 }
756 status = lcc_identifier_to_string (c, ident_str, sizeof (ident_str),
757 &vl->identifier);
758 if (status != 0)
759 return (status);
761 SSTRCATF (command, "PUTVAL %s",
762 lcc_strescape (ident_esc, ident_str, sizeof (ident_esc)));
764 if (vl->interval > 0)
765 SSTRCATF (command, " interval=%i", vl->interval);
767 if (vl->time > 0)
768 SSTRCATF (command, "%u", (unsigned int) vl->time);
769 else
770 SSTRCAT (command, "N");
772 for (i = 0; i < vl->values_len; i++)
773 {
774 if (vl->values_types[i] == LCC_TYPE_COUNTER)
775 SSTRCATF (command, ":%"PRIu64, vl->values[i].counter);
776 else if (vl->values_types[i] == LCC_TYPE_GAUGE)
777 {
778 if (isnan (vl->values[i].gauge))
779 SSTRCPY (command, ":U");
780 else
781 SSTRCATF (command, ":%g", vl->values[i].gauge);
782 }
783 } /* for (i = 0; i < vl->values_len; i++) */
785 status = lcc_sendreceive (c, command, &res);
786 if (status != 0)
787 return (status);
789 if (res.status != 0)
790 {
791 LCC_SET_ERRSTR (c, "Server error: %s", res.message);
792 lcc_response_free (&res);
793 return (-1);
794 }
796 lcc_response_free (&res);
797 return (0);
798 } /* }}} int lcc_putval */
800 int lcc_flush (lcc_connection_t *c, const char *plugin, /* {{{ */
801 lcc_identifier_t *ident, int timeout)
802 {
803 char command[1024] = "";
804 lcc_response_t res;
805 int status;
807 if (c == NULL)
808 {
809 lcc_set_errno (c, EINVAL);
810 return (-1);
811 }
813 SSTRCPY (command, "FLUSH");
815 if (timeout > 0)
816 SSTRCATF (command, " timeout=%i", timeout);
818 if (plugin != NULL)
819 {
820 char buffer[2 * LCC_NAME_LEN];
821 SSTRCATF (command, " plugin=%s",
822 lcc_strescape (buffer, plugin, sizeof (buffer)));
823 }
825 if (ident != NULL)
826 {
827 char ident_str[6 * LCC_NAME_LEN];
828 char ident_esc[12 * LCC_NAME_LEN];
830 status = lcc_identifier_to_string (c, ident_str, sizeof (ident_str), ident);
831 if (status != 0)
832 return (status);
834 SSTRCATF (command, " identifier=%s",
835 lcc_strescape (ident_esc, ident_str, sizeof (ident_esc)));
836 }
838 status = lcc_sendreceive (c, command, &res);
839 if (status != 0)
840 return (status);
842 if (res.status != 0)
843 {
844 LCC_SET_ERRSTR (c, "Server error: %s", res.message);
845 lcc_response_free (&res);
846 return (-1);
847 }
849 lcc_response_free (&res);
850 return (0);
851 } /* }}} int lcc_flush */
853 /* TODO: Implement lcc_putnotif */
855 int lcc_listval (lcc_connection_t *c, /* {{{ */
856 lcc_identifier_t **ret_ident, size_t *ret_ident_num)
857 {
858 lcc_response_t res;
859 size_t i;
860 int status;
862 lcc_identifier_t *ident;
863 size_t ident_num;
865 if (c == NULL)
866 return (-1);
868 if ((ret_ident == NULL) || (ret_ident_num == NULL))
869 {
870 lcc_set_errno (c, EINVAL);
871 return (-1);
872 }
874 status = lcc_sendreceive (c, "LISTVAL", &res);
875 if (status != 0)
876 return (status);
878 if (res.status != 0)
879 {
880 LCC_SET_ERRSTR (c, "Server error: %s", res.message);
881 lcc_response_free (&res);
882 return (-1);
883 }
885 ident_num = res.lines_num;
886 ident = (lcc_identifier_t *) malloc (ident_num * sizeof (*ident));
887 if (ident == NULL)
888 {
889 lcc_response_free (&res);
890 lcc_set_errno (c, ENOMEM);
891 return (-1);
892 }
894 for (i = 0; i < res.lines_num; i++)
895 {
896 char *time_str;
897 char *ident_str;
899 /* First field is the time. */
900 time_str = res.lines[i];
902 /* Set `ident_str' to the beginning of the second field. */
903 ident_str = time_str;
904 while ((*ident_str != ' ') && (*ident_str != '\t') && (*ident_str != 0))
905 ident_str++;
906 while ((*ident_str == ' ') || (*ident_str == '\t'))
907 {
908 *ident_str = 0;
909 ident_str++;
910 }
912 if (*ident_str == 0)
913 {
914 lcc_set_errno (c, EILSEQ);
915 status = -1;
916 break;
917 }
919 status = lcc_string_to_identifier (c, ident + i, ident_str);
920 if (status != 0)
921 break;
922 }
924 lcc_response_free (&res);
926 if (status != 0)
927 {
928 free (ident);
929 return (-1);
930 }
932 *ret_ident = ident;
933 *ret_ident_num = ident_num;
935 return (0);
936 } /* }}} int lcc_listval */
938 const char *lcc_strerror (lcc_connection_t *c) /* {{{ */
939 {
940 if (c == NULL)
941 return ("Invalid object");
942 return (c->errbuf);
943 } /* }}} const char *lcc_strerror */
945 int lcc_identifier_to_string (lcc_connection_t *c, /* {{{ */
946 char *string, size_t string_size, const lcc_identifier_t *ident)
947 {
948 if ((string == NULL) || (string_size < 6) || (ident == NULL))
949 {
950 lcc_set_errno (c, EINVAL);
951 return (-1);
952 }
954 if (ident->plugin_instance[0] == 0)
955 {
956 if (ident->type_instance[0] == 0)
957 snprintf (string, string_size, "%s/%s/%s",
958 ident->host,
959 ident->plugin,
960 ident->type);
961 else
962 snprintf (string, string_size, "%s/%s/%s-%s",
963 ident->host,
964 ident->plugin,
965 ident->type,
966 ident->type_instance);
967 }
968 else
969 {
970 if (ident->type_instance[0] == 0)
971 snprintf (string, string_size, "%s/%s-%s/%s",
972 ident->host,
973 ident->plugin,
974 ident->plugin_instance,
975 ident->type);
976 else
977 snprintf (string, string_size, "%s/%s-%s/%s-%s",
978 ident->host,
979 ident->plugin,
980 ident->plugin_instance,
981 ident->type,
982 ident->type_instance);
983 }
985 string[string_size - 1] = 0;
986 return (0);
987 } /* }}} int lcc_identifier_to_string */
989 int lcc_string_to_identifier (lcc_connection_t *c, /* {{{ */
990 lcc_identifier_t *ident, const char *string)
991 {
992 char *string_copy;
993 char *host;
994 char *plugin;
995 char *plugin_instance;
996 char *type;
997 char *type_instance;
999 string_copy = lcc_strdup (string);
1000 if (string_copy == NULL)
1001 {
1002 lcc_set_errno (c, ENOMEM);
1003 return (-1);
1004 }
1006 host = string_copy;
1007 plugin = strchr (host, '/');
1008 if (plugin == NULL)
1009 {
1010 LCC_SET_ERRSTR (c, "Malformed identifier string: %s", string);
1011 free (string_copy);
1012 return (-1);
1013 }
1014 *plugin = 0;
1015 plugin++;
1017 type = strchr (plugin, '/');
1018 if (type == NULL)
1019 {
1020 LCC_SET_ERRSTR (c, "Malformed identifier string: %s", string);
1021 free (string_copy);
1022 return (-1);
1023 }
1024 *type = 0;
1025 type++;
1027 plugin_instance = strchr (plugin, '-');
1028 if (plugin_instance != NULL)
1029 {
1030 *plugin_instance = 0;
1031 plugin_instance++;
1032 }
1034 type_instance = strchr (type, '-');
1035 if (type_instance != NULL)
1036 {
1037 *type_instance = 0;
1038 type_instance++;
1039 }
1041 memset (ident, 0, sizeof (*ident));
1043 SSTRCPY (ident->host, host);
1044 SSTRCPY (ident->plugin, plugin);
1045 if (plugin_instance != NULL)
1046 SSTRCPY (ident->plugin_instance, plugin_instance);
1047 SSTRCPY (ident->type, type);
1048 if (type_instance != NULL)
1049 SSTRCPY (ident->type_instance, type_instance);
1051 free (string_copy);
1052 return (0);
1053 } /* }}} int lcc_string_to_identifier */
1055 /* vim: set sw=2 sts=2 et fdm=marker : */