2 * collectd - src/common.c
3 * Copyright (C) 2005-2014 Florian octo Forster
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
24 * Florian octo Forster <octo at collectd.org>
25 * Niki W. Waibel <niki.waibel@gmx.net>
26 * Sebastian Harl <sh at tokkee.org>
27 * Michał Mirosław <mirq-linux at rere.qmqm.pl>
37 #include "utils_cache.h"
46 #include <sys/types.h>
52 # include <netinet/in.h>
55 /* for ntohl and htonl */
57 # include <arpa/inet.h>
61 extern kstat_ctl_t *kc;
65 static pthread_mutex_t getpwnam_r_lock = PTHREAD_MUTEX_INITIALIZER;
69 static pthread_mutex_t strerror_r_lock = PTHREAD_MUTEX_INITIALIZER;
72 char *sstrncpy (char *dest, const char *src, size_t n)
74 strncpy (dest, src, n);
78 } /* char *sstrncpy */
80 int ssnprintf (char *dest, size_t n, const char *format, ...)
85 va_start (ap, format);
86 ret = vsnprintf (dest, n, format, ap);
93 char *ssnprintf_alloc (char const *format, ...) /* {{{ */
95 char static_buffer[1024] = "";
97 size_t alloc_buffer_size;
101 /* Try printing into the static buffer. In many cases it will be
102 * sufficiently large and we can simply return a strdup() of this
104 va_start (ap, format);
105 status = vsnprintf (static_buffer, sizeof (static_buffer), format, ap);
110 /* "status" does not include the null byte. */
111 alloc_buffer_size = (size_t) (status + 1);
112 if (alloc_buffer_size <= sizeof (static_buffer))
113 return (strdup (static_buffer));
115 /* Allocate a buffer large enough to hold the string. */
116 alloc_buffer = calloc (1, alloc_buffer_size);
117 if (alloc_buffer == NULL)
120 /* Print again into this new buffer. */
121 va_start (ap, format);
122 status = vsnprintf (alloc_buffer, alloc_buffer_size, format, ap);
126 sfree (alloc_buffer);
130 return (alloc_buffer);
131 } /* }}} char *ssnprintf_alloc */
133 char *sstrdup (const char *s)
141 /* Do not use `strdup' here, because it's not specified in POSIX. It's
142 * ``only'' an XSI extension. */
147 ERROR ("sstrdup: Out of memory.");
150 memcpy (r, s, sizeof (char) * sz);
153 } /* char *sstrdup */
155 /* Even though Posix requires "strerror_r" to return an "int",
156 * some systems (e.g. the GNU libc) return a "char *" _and_
157 * ignore the second argument ... -tokkee */
158 char *sstrerror (int errnum, char *buf, size_t buflen)
166 pthread_mutex_lock (&strerror_r_lock);
168 temp = strerror (errnum);
169 sstrncpy (buf, temp, buflen);
171 pthread_mutex_unlock (&strerror_r_lock);
173 /* #endif !HAVE_STRERROR_R */
175 #elif STRERROR_R_CHAR_P
178 temp = strerror_r (errnum, buf, buflen);
181 if ((temp != NULL) && (temp != buf) && (temp[0] != '\0'))
182 sstrncpy (buf, temp, buflen);
184 sstrncpy (buf, "strerror_r did not return "
185 "an error message", buflen);
188 /* #endif STRERROR_R_CHAR_P */
191 if (strerror_r (errnum, buf, buflen) != 0)
193 ssnprintf (buf, buflen, "Error #%i; "
194 "Additionally, strerror_r failed.",
197 #endif /* STRERROR_R_CHAR_P */
200 } /* char *sstrerror */
202 void *smalloc (size_t size)
206 if ((r = malloc (size)) == NULL)
208 ERROR ("Not enough memory.");
213 } /* void *smalloc */
216 void sfree (void **ptr)
228 ssize_t sread (int fd, void *buf, size_t count)
239 status = read (fd, (void *) ptr, nleft);
241 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
249 DEBUG ("Received EOF from fd %i. "
250 "Closing fd and returning error.",
256 assert ((0 > status) || (nleft >= (size_t)status));
258 nleft = nleft - ((size_t) status);
259 ptr = ptr + ((size_t) status);
266 ssize_t swrite (int fd, const void *buf, size_t count)
273 ptr = (const char *) buf;
276 /* checking for closed peer connection */
278 pfd.events = POLLIN | POLLHUP;
280 if (poll(&pfd, 1, 0) > 0) {
282 if (recv(fd, buffer, sizeof(buffer), MSG_PEEK | MSG_DONTWAIT) == 0) {
283 // if recv returns zero (even though poll() said there is data to be read),
284 // that means the connection has been closed
291 status = write (fd, (const void *) ptr, nleft);
293 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
299 nleft = nleft - ((size_t) status);
300 ptr = ptr + ((size_t) status);
306 int strsplit (char *string, char **fields, size_t size)
315 while ((fields[i] = strtok_r (ptr, " \t\r\n", &saveptr)) != NULL)
327 int strjoin (char *buffer, size_t buffer_size,
328 char **fields, size_t fields_num,
336 if ((buffer_size < 1) || (fields_num == 0))
339 memset (buffer, 0, buffer_size);
341 avail = buffer_size - 1;
345 sep_len = strlen (sep);
347 for (i = 0; i < fields_num; i++)
351 if ((i > 0) && (sep_len > 0))
356 memcpy (ptr, sep, sep_len);
361 field_len = strlen (fields[i]);
362 if (avail < field_len)
365 memcpy (ptr, fields[i], field_len);
370 assert (buffer[buffer_size - 1] == 0);
371 return ((int) strlen (buffer));
374 int escape_string (char *buffer, size_t buffer_size)
380 /* Check if we need to escape at all first */
381 temp = strpbrk (buffer, " \t\"\\");
388 temp = calloc (1, buffer_size);
395 for (i = 0; i < buffer_size; i++)
401 else if ((buffer[i] == '"') || (buffer[i] == '\\'))
403 if (j > (buffer_size - 4))
406 temp[j + 1] = buffer[i];
411 if (j > (buffer_size - 3))
418 assert ((j + 1) < buffer_size);
422 sstrncpy (buffer, temp, buffer_size);
425 } /* int escape_string */
427 int strunescape (char *buf, size_t buf_len)
431 for (i = 0; (i < buf_len) && (buf[i] != '\0'); ++i)
436 if (((i + 1) >= buf_len) || (buf[i + 1] == 0)) {
437 ERROR ("string unescape: backslash found at end of string.");
438 /* Ensure null-byte at the end of the buffer. */
443 switch (buf[i + 1]) {
458 /* Move everything after the position one position to the left.
459 * Add a null-byte as last character in the buffer. */
460 memmove (buf + i + 1, buf + i + 2, buf_len - i - 2);
461 buf[buf_len - 1] = 0;
464 } /* int strunescape */
466 size_t strstripnewline (char *buffer)
468 size_t buffer_len = strlen (buffer);
470 while (buffer_len > 0)
472 if ((buffer[buffer_len - 1] != '\n')
473 && (buffer[buffer_len - 1] != '\r'))
476 buffer[buffer_len] = 0;
480 } /* size_t strstripnewline */
482 int escape_slashes (char *buffer, size_t buffer_size)
487 buffer_len = strlen (buffer);
491 if (strcmp ("/", buffer) == 0)
495 sstrncpy (buffer, "root", buffer_size);
500 /* Move one to the left */
501 if (buffer[0] == '/')
503 memmove (buffer, buffer + 1, buffer_len);
507 for (i = 0; i < buffer_len; i++)
509 if (buffer[i] == '/')
514 } /* int escape_slashes */
516 void replace_special (char *buffer, size_t buffer_size)
520 for (i = 0; i < buffer_size; i++)
524 if ((!isalnum ((int) buffer[i])) && (buffer[i] != '-'))
527 } /* void replace_special */
529 int timeval_cmp (struct timeval tv0, struct timeval tv1, struct timeval *delta)
531 struct timeval *larger;
532 struct timeval *smaller;
536 NORMALIZE_TIMEVAL (tv0);
537 NORMALIZE_TIMEVAL (tv1);
539 if ((tv0.tv_sec == tv1.tv_sec) && (tv0.tv_usec == tv1.tv_usec))
548 if ((tv0.tv_sec < tv1.tv_sec)
549 || ((tv0.tv_sec == tv1.tv_sec) && (tv0.tv_usec < tv1.tv_usec)))
563 delta->tv_sec = larger->tv_sec - smaller->tv_sec;
565 if (smaller->tv_usec <= larger->tv_usec)
566 delta->tv_usec = larger->tv_usec - smaller->tv_usec;
570 delta->tv_usec = 1000000 + larger->tv_usec - smaller->tv_usec;
574 assert ((delta == NULL)
575 || ((0 <= delta->tv_usec) && (delta->tv_usec < 1000000)));
578 } /* int timeval_cmp */
580 int check_create_dir (const char *file_orig)
591 int last_is_file = 1;
592 int path_is_absolute = 0;
597 * Sanity checks first
599 if (file_orig == NULL)
602 if ((len = strlen (file_orig)) < 1)
604 else if (len >= sizeof (file_copy))
608 * If `file_orig' ends in a slash the last component is a directory,
609 * otherwise it's a file. Act accordingly..
611 if (file_orig[len - 1] == '/')
613 if (file_orig[0] == '/')
614 path_is_absolute = 1;
617 * Create a copy for `strtok_r' to destroy
619 sstrncpy (file_copy, file_orig, sizeof (file_copy));
622 * Break into components. This will eat up several slashes in a row and
623 * remove leading and trailing slashes..
628 while ((fields[fields_num] = strtok_r (ptr, "/", &saveptr)) != NULL)
633 if (fields_num >= 16)
638 * For each component, do..
640 for (i = 0; i < (fields_num - last_is_file); i++)
643 * Do not create directories that start with a dot. This
644 * prevents `../../' attacks and other likely malicious
647 if (fields[i][0] == '.')
649 ERROR ("Cowardly refusing to create a directory that "
650 "begins with a `.' (dot): `%s'", file_orig);
655 * Join the components together again
658 if (strjoin (dir + path_is_absolute, (size_t) (dir_len - path_is_absolute),
659 fields, (size_t) (i + 1), "/") < 0)
661 ERROR ("strjoin failed: `%s', component #%i", file_orig, i);
666 if ((stat (dir, &statbuf) == -1)
667 && (lstat (dir, &statbuf) == -1))
671 if (mkdir (dir, S_IRWXU | S_IRWXG | S_IRWXO) == 0)
674 /* this might happen, if a different thread created
675 * the directory in the meantime
676 * => call stat() again to check for S_ISDIR() */
681 ERROR ("check_create_dir: mkdir (%s): %s", dir,
683 errbuf, sizeof (errbuf)));
689 ERROR ("check_create_dir: stat (%s): %s", dir,
690 sstrerror (errno, errbuf,
695 else if (!S_ISDIR (statbuf.st_mode))
697 ERROR ("check_create_dir: `%s' exists but is not "
698 "a directory!", dir);
706 } /* check_create_dir */
709 int get_kstat (kstat_t **ksp_ptr, char *module, int instance, char *name)
718 ssnprintf (ident, sizeof (ident), "%s,%i,%s", module, instance, name);
720 *ksp_ptr = kstat_lookup (kc, module, instance, name);
721 if (*ksp_ptr == NULL)
723 ERROR ("get_kstat: Cound not find kstat %s", ident);
727 if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED)
729 ERROR ("get_kstat: kstat %s has wrong type", ident);
735 assert (*ksp_ptr != NULL);
736 assert ((*ksp_ptr)->ks_type == KSTAT_TYPE_NAMED);
739 if (kstat_read (kc, *ksp_ptr, NULL) == -1)
741 ERROR ("get_kstat: kstat %s could not be read", ident);
745 if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED)
747 ERROR ("get_kstat: kstat %s has wrong type", ident);
754 long long get_kstat_value (kstat_t *ksp, char *name)
757 long long retval = -1LL;
761 ERROR ("get_kstat_value (\"%s\"): ksp is NULL.", name);
764 else if (ksp->ks_type != KSTAT_TYPE_NAMED)
766 ERROR ("get_kstat_value (\"%s\"): ksp->ks_type (%#x) "
767 "is not KSTAT_TYPE_NAMED (%#x).",
769 (unsigned int) ksp->ks_type,
770 (unsigned int) KSTAT_TYPE_NAMED);
774 if ((kn = (kstat_named_t *) kstat_data_lookup (ksp, name)) == NULL)
777 if (kn->data_type == KSTAT_DATA_INT32)
778 retval = (long long) kn->value.i32;
779 else if (kn->data_type == KSTAT_DATA_UINT32)
780 retval = (long long) kn->value.ui32;
781 else if (kn->data_type == KSTAT_DATA_INT64)
782 retval = (long long) kn->value.i64; /* According to ANSI C99 `long long' must hold at least 64 bits */
783 else if (kn->data_type == KSTAT_DATA_UINT64)
784 retval = (long long) kn->value.ui64; /* XXX: Might overflow! */
786 WARNING ("get_kstat_value: Not a numeric value: %s", name);
790 #endif /* HAVE_LIBKSTAT */
793 unsigned long long ntohll (unsigned long long n)
795 #if BYTE_ORDER == BIG_ENDIAN
798 return (((unsigned long long) ntohl (n)) << 32) + ntohl (n >> 32);
800 } /* unsigned long long ntohll */
802 unsigned long long htonll (unsigned long long n)
804 #if BYTE_ORDER == BIG_ENDIAN
807 return (((unsigned long long) htonl (n)) << 32) + htonl (n >> 32);
809 } /* unsigned long long htonll */
810 #endif /* HAVE_HTONLL */
812 #if FP_LAYOUT_NEED_NOTHING
813 /* Well, we need nothing.. */
814 /* #endif FP_LAYOUT_NEED_NOTHING */
816 #elif FP_LAYOUT_NEED_ENDIANFLIP || FP_LAYOUT_NEED_INTSWAP
817 # if FP_LAYOUT_NEED_ENDIANFLIP
818 # define FP_CONVERT(A) ((((uint64_t)(A) & 0xff00000000000000LL) >> 56) | \
819 (((uint64_t)(A) & 0x00ff000000000000LL) >> 40) | \
820 (((uint64_t)(A) & 0x0000ff0000000000LL) >> 24) | \
821 (((uint64_t)(A) & 0x000000ff00000000LL) >> 8) | \
822 (((uint64_t)(A) & 0x00000000ff000000LL) << 8) | \
823 (((uint64_t)(A) & 0x0000000000ff0000LL) << 24) | \
824 (((uint64_t)(A) & 0x000000000000ff00LL) << 40) | \
825 (((uint64_t)(A) & 0x00000000000000ffLL) << 56))
827 # define FP_CONVERT(A) ((((uint64_t)(A) & 0xffffffff00000000LL) >> 32) | \
828 (((uint64_t)(A) & 0x00000000ffffffffLL) << 32))
831 double ntohd (double d)
842 /* NAN in x86 byte order */
843 if ((ret.byte[0] == 0x00) && (ret.byte[1] == 0x00)
844 && (ret.byte[2] == 0x00) && (ret.byte[3] == 0x00)
845 && (ret.byte[4] == 0x00) && (ret.byte[5] == 0x00)
846 && (ret.byte[6] == 0xf8) && (ret.byte[7] == 0x7f))
855 ret.integer = FP_CONVERT (tmp);
856 return (ret.floating);
860 double htond (double d)
871 ret.byte[0] = ret.byte[1] = ret.byte[2] = ret.byte[3] = 0x00;
872 ret.byte[4] = ret.byte[5] = 0x00;
875 return (ret.floating);
882 tmp = FP_CONVERT (ret.integer);
884 return (ret.floating);
887 #endif /* FP_LAYOUT_NEED_ENDIANFLIP || FP_LAYOUT_NEED_INTSWAP */
889 int format_name (char *ret, int ret_len,
890 const char *hostname,
891 const char *plugin, const char *plugin_instance,
892 const char *type, const char *type_instance)
898 buffer_size = (size_t) ret_len;
900 #define APPEND(str) do { \
901 size_t l = strlen (str); \
902 if (l >= buffer_size) \
904 memcpy (buffer, (str), l); \
905 buffer += l; buffer_size -= l; \
908 assert (plugin != NULL);
909 assert (type != NULL);
914 if ((plugin_instance != NULL) && (plugin_instance[0] != 0))
917 APPEND (plugin_instance);
921 if ((type_instance != NULL) && (type_instance[0] != 0))
924 APPEND (type_instance);
926 assert (buffer_size > 0);
931 } /* int format_name */
933 int format_values (char *ret, size_t ret_len, /* {{{ */
934 const data_set_t *ds, const value_list_t *vl,
940 gauge_t *rates = NULL;
942 assert (0 == strcmp (ds->type, vl->type));
944 memset (ret, 0, ret_len);
946 #define BUFFER_ADD(...) do { \
947 status = ssnprintf (ret + offset, ret_len - offset, \
954 else if (((size_t) status) >= (ret_len - offset)) \
960 offset += ((size_t) status); \
963 BUFFER_ADD ("%.3f", CDTIME_T_TO_DOUBLE (vl->time));
965 for (i = 0; i < ds->ds_num; i++)
967 if (ds->ds[i].type == DS_TYPE_GAUGE)
968 BUFFER_ADD (":"GAUGE_FORMAT, vl->values[i].gauge);
969 else if (store_rates)
972 rates = uc_get_rate (ds, vl);
975 WARNING ("format_values: uc_get_rate failed.");
978 BUFFER_ADD (":"GAUGE_FORMAT, rates[i]);
980 else if (ds->ds[i].type == DS_TYPE_COUNTER)
981 BUFFER_ADD (":%llu", vl->values[i].counter);
982 else if (ds->ds[i].type == DS_TYPE_DERIVE)
983 BUFFER_ADD (":%"PRIi64, vl->values[i].derive);
984 else if (ds->ds[i].type == DS_TYPE_ABSOLUTE)
985 BUFFER_ADD (":%"PRIu64, vl->values[i].absolute);
988 ERROR ("format_values: Unknown data source type: %i",
993 } /* for ds->ds_num */
999 } /* }}} int format_values */
1001 int parse_identifier (char *str, char **ret_host,
1002 char **ret_plugin, char **ret_plugin_instance,
1003 char **ret_type, char **ret_type_instance)
1005 char *hostname = NULL;
1006 char *plugin = NULL;
1007 char *plugin_instance = NULL;
1009 char *type_instance = NULL;
1012 if (hostname == NULL)
1015 plugin = strchr (hostname, '/');
1018 *plugin = '\0'; plugin++;
1020 type = strchr (plugin, '/');
1023 *type = '\0'; type++;
1025 plugin_instance = strchr (plugin, '-');
1026 if (plugin_instance != NULL)
1028 *plugin_instance = '\0';
1032 type_instance = strchr (type, '-');
1033 if (type_instance != NULL)
1035 *type_instance = '\0';
1039 *ret_host = hostname;
1040 *ret_plugin = plugin;
1041 *ret_plugin_instance = plugin_instance;
1043 *ret_type_instance = type_instance;
1045 } /* int parse_identifier */
1047 int parse_identifier_vl (const char *str, value_list_t *vl) /* {{{ */
1049 char str_copy[6 * DATA_MAX_NAME_LEN];
1051 char *plugin = NULL;
1052 char *plugin_instance = NULL;
1054 char *type_instance = NULL;
1057 if ((str == NULL) || (vl == NULL))
1060 sstrncpy (str_copy, str, sizeof (str_copy));
1062 status = parse_identifier (str_copy, &host,
1063 &plugin, &plugin_instance,
1064 &type, &type_instance);
1068 sstrncpy (vl->host, host, sizeof (vl->host));
1069 sstrncpy (vl->plugin, plugin, sizeof (vl->plugin));
1070 sstrncpy (vl->plugin_instance,
1071 (plugin_instance != NULL) ? plugin_instance : "",
1072 sizeof (vl->plugin_instance));
1073 sstrncpy (vl->type, type, sizeof (vl->type));
1074 sstrncpy (vl->type_instance,
1075 (type_instance != NULL) ? type_instance : "",
1076 sizeof (vl->type_instance));
1079 } /* }}} int parse_identifier_vl */
1081 int parse_value (const char *value_orig, value_t *ret_value, int ds_type)
1084 char *endptr = NULL;
1087 if (value_orig == NULL)
1090 value = strdup (value_orig);
1093 value_len = strlen (value);
1095 while ((value_len > 0) && isspace ((int) value[value_len - 1]))
1097 value[value_len - 1] = 0;
1103 case DS_TYPE_COUNTER:
1104 ret_value->counter = (counter_t) strtoull (value, &endptr, 0);
1108 ret_value->gauge = (gauge_t) strtod (value, &endptr);
1111 case DS_TYPE_DERIVE:
1112 ret_value->derive = (derive_t) strtoll (value, &endptr, 0);
1115 case DS_TYPE_ABSOLUTE:
1116 ret_value->absolute = (absolute_t) strtoull (value, &endptr, 0);
1121 ERROR ("parse_value: Invalid data source type: %i.", ds_type);
1125 if (value == endptr) {
1126 ERROR ("parse_value: Failed to parse string as %s: %s.",
1127 DS_TYPE_TO_STRING (ds_type), value);
1131 else if ((NULL != endptr) && ('\0' != *endptr))
1132 INFO ("parse_value: Ignoring trailing garbage \"%s\" after %s value. "
1133 "Input string was \"%s\".",
1134 endptr, DS_TYPE_TO_STRING (ds_type), value_orig);
1138 } /* int parse_value */
1140 int parse_values (char *buffer, value_list_t *vl, const data_set_t *ds)
1147 if ((buffer == NULL) || (vl == NULL) || (ds == NULL))
1154 while ((ptr = strtok_r (dummy, ":", &saveptr)) != NULL)
1158 if (i >= vl->values_len)
1160 /* Make sure i is invalid. */
1167 if (strcmp ("N", ptr) == 0)
1168 vl->time = cdtime ();
1171 char *endptr = NULL;
1175 tmp = strtod (ptr, &endptr);
1176 if ((errno != 0) /* Overflow */
1177 || (endptr == ptr) /* Invalid string */
1178 || (endptr == NULL) /* This should not happen */
1179 || (*endptr != 0)) /* Trailing chars */
1182 vl->time = DOUBLE_TO_CDTIME_T (tmp);
1188 if ((strcmp ("U", ptr) == 0) && (ds->ds[i].type == DS_TYPE_GAUGE))
1189 vl->values[i].gauge = NAN;
1190 else if (0 != parse_value (ptr, &vl->values[i], ds->ds[i].type))
1194 } /* while (strtok_r) */
1196 if ((ptr != NULL) || (i == 0))
1199 } /* int parse_values */
1201 #if !HAVE_GETPWNAM_R
1202 int getpwnam_r (const char *name, struct passwd *pwbuf, char *buf,
1203 size_t buflen, struct passwd **pwbufp)
1208 memset (pwbuf, '\0', sizeof (struct passwd));
1210 pthread_mutex_lock (&getpwnam_r_lock);
1214 pw = getpwnam (name);
1217 status = (errno != 0) ? errno : ENOENT;
1221 #define GETPWNAM_COPY_MEMBER(member) \
1222 if (pw->member != NULL) \
1224 int len = strlen (pw->member); \
1225 if (len >= buflen) \
1230 sstrncpy (buf, pw->member, buflen); \
1231 pwbuf->member = buf; \
1233 buflen -= (len + 1); \
1235 GETPWNAM_COPY_MEMBER(pw_name);
1236 GETPWNAM_COPY_MEMBER(pw_passwd);
1237 GETPWNAM_COPY_MEMBER(pw_gecos);
1238 GETPWNAM_COPY_MEMBER(pw_dir);
1239 GETPWNAM_COPY_MEMBER(pw_shell);
1241 pwbuf->pw_uid = pw->pw_uid;
1242 pwbuf->pw_gid = pw->pw_gid;
1248 pthread_mutex_unlock (&getpwnam_r_lock);
1251 } /* int getpwnam_r */
1252 #endif /* !HAVE_GETPWNAM_R */
1254 int notification_init (notification_t *n, int severity, const char *message,
1256 const char *plugin, const char *plugin_instance,
1257 const char *type, const char *type_instance)
1259 memset (n, '\0', sizeof (notification_t));
1261 n->severity = severity;
1263 if (message != NULL)
1264 sstrncpy (n->message, message, sizeof (n->message));
1266 sstrncpy (n->host, host, sizeof (n->host));
1268 sstrncpy (n->plugin, plugin, sizeof (n->plugin));
1269 if (plugin_instance != NULL)
1270 sstrncpy (n->plugin_instance, plugin_instance,
1271 sizeof (n->plugin_instance));
1273 sstrncpy (n->type, type, sizeof (n->type));
1274 if (type_instance != NULL)
1275 sstrncpy (n->type_instance, type_instance,
1276 sizeof (n->type_instance));
1279 } /* int notification_init */
1281 int walk_directory (const char *dir, dirwalk_callback_f callback,
1282 void *user_data, int include_hidden)
1292 if ((dh = opendir (dir)) == NULL)
1295 ERROR ("walk_directory: Cannot open '%s': %s", dir,
1296 sstrerror (errno, errbuf, sizeof (errbuf)));
1300 while ((ent = readdir (dh)) != NULL)
1306 if ((strcmp (".", ent->d_name) == 0)
1307 || (strcmp ("..", ent->d_name) == 0))
1310 else /* if (!include_hidden) */
1312 if (ent->d_name[0]=='.')
1316 status = (*callback) (dir, ent->d_name, user_data);
1325 if ((success == 0) && (failure > 0))
1330 ssize_t read_file_contents (const char *filename, char *buf, size_t bufsize)
1335 fh = fopen (filename, "r");
1339 ret = (ssize_t) fread (buf, 1, bufsize, fh);
1340 if ((ret == 0) && (ferror (fh) != 0))
1342 ERROR ("read_file_contents: Reading file \"%s\" failed.",
1351 counter_t counter_diff (counter_t old_value, counter_t new_value)
1355 if (old_value > new_value)
1357 if (old_value <= 4294967295U)
1358 diff = (4294967295U - old_value) + new_value + 1;
1360 diff = (18446744073709551615ULL - old_value) + new_value + 1;
1364 diff = new_value - old_value;
1368 } /* counter_t counter_diff */
1370 int rate_to_value (value_t *ret_value, gauge_t rate, /* {{{ */
1371 rate_to_value_state_t *state,
1372 int ds_type, cdtime_t t)
1374 gauge_t delta_gauge;
1377 if (ds_type == DS_TYPE_GAUGE)
1379 state->last_value.gauge = rate;
1380 state->last_time = t;
1382 *ret_value = state->last_value;
1386 /* Counter and absolute can't handle negative rates. Reset "last time"
1387 * to zero, so that the next valid rate will re-initialize the
1390 && ((ds_type == DS_TYPE_COUNTER)
1391 || (ds_type == DS_TYPE_ABSOLUTE)))
1393 memset (state, 0, sizeof (*state));
1397 /* Another invalid state: The time is not increasing. */
1398 if (t <= state->last_time)
1400 memset (state, 0, sizeof (*state));
1404 delta_t = t - state->last_time;
1405 delta_gauge = (rate * CDTIME_T_TO_DOUBLE (delta_t)) + state->residual;
1407 /* Previous value is invalid. */
1408 if (state->last_time == 0) /* {{{ */
1410 if (ds_type == DS_TYPE_DERIVE)
1412 state->last_value.derive = (derive_t) rate;
1413 state->residual = rate - ((gauge_t) state->last_value.derive);
1415 else if (ds_type == DS_TYPE_COUNTER)
1417 state->last_value.counter = (counter_t) rate;
1418 state->residual = rate - ((gauge_t) state->last_value.counter);
1420 else if (ds_type == DS_TYPE_ABSOLUTE)
1422 state->last_value.absolute = (absolute_t) rate;
1423 state->residual = rate - ((gauge_t) state->last_value.absolute);
1430 state->last_time = t;
1434 if (ds_type == DS_TYPE_DERIVE)
1436 derive_t delta_derive = (derive_t) delta_gauge;
1438 state->last_value.derive += delta_derive;
1439 state->residual = delta_gauge - ((gauge_t) delta_derive);
1441 else if (ds_type == DS_TYPE_COUNTER)
1443 counter_t delta_counter = (counter_t) delta_gauge;
1445 state->last_value.counter += delta_counter;
1446 state->residual = delta_gauge - ((gauge_t) delta_counter);
1448 else if (ds_type == DS_TYPE_ABSOLUTE)
1450 absolute_t delta_absolute = (absolute_t) delta_gauge;
1452 state->last_value.absolute = delta_absolute;
1453 state->residual = delta_gauge - ((gauge_t) delta_absolute);
1460 state->last_time = t;
1461 *ret_value = state->last_value;
1463 } /* }}} value_t rate_to_value */
1465 int value_to_rate (gauge_t *ret_rate, /* {{{ */
1466 value_t value, int ds_type, cdtime_t t, value_to_rate_state_t *state)
1470 /* Another invalid state: The time is not increasing. */
1471 if (t <= state->last_time)
1473 memset (state, 0, sizeof (*state));
1477 interval = CDTIME_T_TO_DOUBLE(t - state->last_time);
1479 /* Previous value is invalid. */
1480 if (state->last_time == 0)
1482 state->last_value = value;
1483 state->last_time = t;
1488 case DS_TYPE_DERIVE: {
1489 derive_t diff = value.derive - state->last_value.derive;
1490 *ret_rate = ((gauge_t) diff) / ((gauge_t) interval);
1493 case DS_TYPE_GAUGE: {
1494 *ret_rate = value.gauge;
1497 case DS_TYPE_COUNTER: {
1498 counter_t diff = counter_diff (state->last_value.counter, value.counter);
1499 *ret_rate = ((gauge_t) diff) / ((gauge_t) interval);
1502 case DS_TYPE_ABSOLUTE: {
1503 absolute_t diff = value.absolute;
1504 *ret_rate = ((gauge_t) diff) / ((gauge_t) interval);
1511 state->last_value = value;
1512 state->last_time = t;
1514 } /* }}} value_t rate_to_value */
1516 int service_name_to_port_number (const char *service_name)
1518 struct addrinfo *ai_list;
1519 struct addrinfo *ai_ptr;
1520 struct addrinfo ai_hints;
1524 if (service_name == NULL)
1528 memset (&ai_hints, 0, sizeof (ai_hints));
1529 ai_hints.ai_family = AF_UNSPEC;
1531 status = getaddrinfo (/* node = */ NULL, service_name,
1532 &ai_hints, &ai_list);
1535 ERROR ("service_name_to_port_number: getaddrinfo failed: %s",
1536 gai_strerror (status));
1540 service_number = -1;
1541 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
1543 if (ai_ptr->ai_family == AF_INET)
1545 struct sockaddr_in *sa;
1547 sa = (void *) ai_ptr->ai_addr;
1548 service_number = (int) ntohs (sa->sin_port);
1550 else if (ai_ptr->ai_family == AF_INET6)
1552 struct sockaddr_in6 *sa;
1554 sa = (void *) ai_ptr->ai_addr;
1555 service_number = (int) ntohs (sa->sin6_port);
1558 if ((service_number > 0) && (service_number <= 65535))
1562 freeaddrinfo (ai_list);
1564 if ((service_number > 0) && (service_number <= 65535))
1565 return (service_number);
1567 } /* int service_name_to_port_number */
1569 int strtoderive (const char *string, derive_t *ret_value) /* {{{ */
1574 if ((string == NULL) || (ret_value == NULL))
1579 tmp = (derive_t) strtoll (string, &endptr, /* base = */ 0);
1580 if ((endptr == string) || (errno != 0))
1585 } /* }}} int strtoderive */
1587 int strtogauge (const char *string, gauge_t *ret_value) /* {{{ */
1590 char *endptr = NULL;
1592 if ((string == NULL) || (ret_value == NULL))
1597 tmp = (gauge_t) strtod (string, &endptr);
1600 else if ((endptr == NULL) || (*endptr != 0))
1605 } /* }}} int strtogauge */
1607 int strarray_add (char ***ret_array, size_t *ret_array_len, char const *str) /* {{{ */
1610 size_t array_len = *ret_array_len;
1615 array = realloc (*ret_array,
1616 (array_len + 1) * sizeof (*array));
1621 array[array_len] = strdup (str);
1622 if (array[array_len] == NULL)
1626 *ret_array_len = array_len;
1628 } /* }}} int strarray_add */
1630 void strarray_free (char **array, size_t array_len) /* {{{ */
1634 for (i = 0; i < array_len; i++)
1637 } /* }}} void strarray_free */