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"
48 #include <sys/types.h>
54 # include <netinet/in.h>
57 /* for ntohl and htonl */
59 # include <arpa/inet.h>
63 extern kstat_ctl_t *kc;
67 static pthread_mutex_t getpwnam_r_lock = PTHREAD_MUTEX_INITIALIZER;
71 static pthread_mutex_t strerror_r_lock = PTHREAD_MUTEX_INITIALIZER;
74 char *sstrncpy (char *dest, const char *src, size_t n)
76 strncpy (dest, src, n);
80 } /* char *sstrncpy */
82 int ssnprintf (char *dest, size_t n, const char *format, ...)
87 va_start (ap, format);
88 ret = vsnprintf (dest, n, format, ap);
95 char *ssnprintf_alloc (char const *format, ...) /* {{{ */
97 char static_buffer[1024] = "";
99 size_t alloc_buffer_size;
103 /* Try printing into the static buffer. In many cases it will be
104 * sufficiently large and we can simply return a strdup() of this
106 va_start (ap, format);
107 status = vsnprintf (static_buffer, sizeof (static_buffer), format, ap);
112 /* "status" does not include the null byte. */
113 alloc_buffer_size = (size_t) (status + 1);
114 if (alloc_buffer_size <= sizeof (static_buffer))
115 return (strdup (static_buffer));
117 /* Allocate a buffer large enough to hold the string. */
118 alloc_buffer = calloc (1, alloc_buffer_size);
119 if (alloc_buffer == NULL)
122 /* Print again into this new buffer. */
123 va_start (ap, format);
124 status = vsnprintf (alloc_buffer, alloc_buffer_size, format, ap);
128 sfree (alloc_buffer);
132 return (alloc_buffer);
133 } /* }}} char *ssnprintf_alloc */
135 char *sstrdup (const char *s)
143 /* Do not use `strdup' here, because it's not specified in POSIX. It's
144 * ``only'' an XSI extension. */
149 ERROR ("sstrdup: Out of memory.");
152 memcpy (r, s, sizeof (char) * sz);
155 } /* char *sstrdup */
157 /* Even though Posix requires "strerror_r" to return an "int",
158 * some systems (e.g. the GNU libc) return a "char *" _and_
159 * ignore the second argument ... -tokkee */
160 char *sstrerror (int errnum, char *buf, size_t buflen)
168 pthread_mutex_lock (&strerror_r_lock);
170 temp = strerror (errnum);
171 sstrncpy (buf, temp, buflen);
173 pthread_mutex_unlock (&strerror_r_lock);
175 /* #endif !HAVE_STRERROR_R */
177 #elif STRERROR_R_CHAR_P
180 temp = strerror_r (errnum, buf, buflen);
183 if ((temp != NULL) && (temp != buf) && (temp[0] != '\0'))
184 sstrncpy (buf, temp, buflen);
186 sstrncpy (buf, "strerror_r did not return "
187 "an error message", buflen);
190 /* #endif STRERROR_R_CHAR_P */
193 if (strerror_r (errnum, buf, buflen) != 0)
195 ssnprintf (buf, buflen, "Error #%i; "
196 "Additionally, strerror_r failed.",
199 #endif /* STRERROR_R_CHAR_P */
202 } /* char *sstrerror */
204 void *smalloc (size_t size)
208 if ((r = malloc (size)) == NULL)
210 ERROR ("Not enough memory.");
215 } /* void *smalloc */
218 void sfree (void **ptr)
230 ssize_t sread (int fd, void *buf, size_t count)
241 status = read (fd, (void *) ptr, nleft);
243 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
251 DEBUG ("Received EOF from fd %i. "
252 "Closing fd and returning error.",
258 assert ((0 > status) || (nleft >= (size_t)status));
260 nleft = nleft - ((size_t) status);
261 ptr = ptr + ((size_t) status);
268 ssize_t swrite (int fd, const void *buf, size_t count)
275 ptr = (const char *) buf;
278 /* checking for closed peer connection */
280 pfd.events = POLLIN | POLLHUP;
282 if (poll(&pfd, 1, 0) > 0) {
284 if (recv(fd, buffer, sizeof(buffer), MSG_PEEK | MSG_DONTWAIT) == 0) {
285 // if recv returns zero (even though poll() said there is data to be read),
286 // that means the connection has been closed
293 status = write (fd, (const void *) ptr, nleft);
295 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
301 nleft = nleft - ((size_t) status);
302 ptr = ptr + ((size_t) status);
308 int strsplit (char *string, char **fields, size_t size)
317 while ((fields[i] = strtok_r (ptr, " \t\r\n", &saveptr)) != NULL)
329 int strjoin (char *buffer, size_t buffer_size,
330 char **fields, size_t fields_num,
338 if ((buffer_size < 1) || (fields_num <= 0))
341 memset (buffer, 0, buffer_size);
343 avail = buffer_size - 1;
347 sep_len = strlen (sep);
349 for (i = 0; i < fields_num; i++)
353 if ((i > 0) && (sep_len > 0))
358 memcpy (ptr, sep, sep_len);
363 field_len = strlen (fields[i]);
364 if (avail < field_len)
367 memcpy (ptr, fields[i], field_len);
372 assert (buffer[buffer_size - 1] == 0);
373 return ((int) strlen (buffer));
376 int strsubstitute (char *str, char c_from, char c_to)
395 } /* int strsubstitute */
397 int escape_string (char *buffer, size_t buffer_size)
403 /* Check if we need to escape at all first */
404 temp = strpbrk (buffer, " \t\"\\");
411 temp = calloc (1, buffer_size);
418 for (i = 0; i < buffer_size; i++)
424 else if ((buffer[i] == '"') || (buffer[i] == '\\'))
426 if (j > (buffer_size - 4))
429 temp[j + 1] = buffer[i];
434 if (j > (buffer_size - 3))
441 assert ((j + 1) < buffer_size);
445 sstrncpy (buffer, temp, buffer_size);
448 } /* int escape_string */
450 int strunescape (char *buf, size_t buf_len)
454 for (i = 0; (i < buf_len) && (buf[i] != '\0'); ++i)
459 if (((i + 1) >= buf_len) || (buf[i + 1] == 0)) {
460 ERROR ("string unescape: backslash found at end of string.");
461 /* Ensure null-byte at the end of the buffer. */
466 switch (buf[i + 1]) {
481 /* Move everything after the position one position to the left.
482 * Add a null-byte as last character in the buffer. */
483 memmove (buf + i + 1, buf + i + 2, buf_len - i - 2);
484 buf[buf_len - 1] = 0;
487 } /* int strunescape */
489 size_t strstripnewline (char *buffer)
491 size_t buffer_len = strlen (buffer);
493 while (buffer_len > 0)
495 if ((buffer[buffer_len - 1] != '\n')
496 && (buffer[buffer_len - 1] != '\r'))
499 buffer[buffer_len] = 0;
503 } /* size_t strstripnewline */
505 int escape_slashes (char *buffer, size_t buffer_size)
510 buffer_len = strlen (buffer);
514 if (strcmp ("/", buffer) == 0)
518 sstrncpy (buffer, "root", buffer_size);
523 /* Move one to the left */
524 if (buffer[0] == '/')
526 memmove (buffer, buffer + 1, buffer_len);
530 for (i = 0; i < buffer_len; i++)
532 if (buffer[i] == '/')
537 } /* int escape_slashes */
539 void replace_special (char *buffer, size_t buffer_size)
543 for (i = 0; i < buffer_size; i++)
547 if ((!isalnum ((int) buffer[i])) && (buffer[i] != '-'))
550 } /* void replace_special */
552 int timeval_cmp (struct timeval tv0, struct timeval tv1, struct timeval *delta)
554 struct timeval *larger;
555 struct timeval *smaller;
559 NORMALIZE_TIMEVAL (tv0);
560 NORMALIZE_TIMEVAL (tv1);
562 if ((tv0.tv_sec == tv1.tv_sec) && (tv0.tv_usec == tv1.tv_usec))
571 if ((tv0.tv_sec < tv1.tv_sec)
572 || ((tv0.tv_sec == tv1.tv_sec) && (tv0.tv_usec < tv1.tv_usec)))
586 delta->tv_sec = larger->tv_sec - smaller->tv_sec;
588 if (smaller->tv_usec <= larger->tv_usec)
589 delta->tv_usec = larger->tv_usec - smaller->tv_usec;
593 delta->tv_usec = 1000000 + larger->tv_usec - smaller->tv_usec;
597 assert ((delta == NULL)
598 || ((0 <= delta->tv_usec) && (delta->tv_usec < 1000000)));
601 } /* int timeval_cmp */
603 int check_create_dir (const char *file_orig)
614 int last_is_file = 1;
615 int path_is_absolute = 0;
620 * Sanity checks first
622 if (file_orig == NULL)
625 if ((len = strlen (file_orig)) < 1)
627 else if (len >= sizeof (file_copy))
631 * If `file_orig' ends in a slash the last component is a directory,
632 * otherwise it's a file. Act accordingly..
634 if (file_orig[len - 1] == '/')
636 if (file_orig[0] == '/')
637 path_is_absolute = 1;
640 * Create a copy for `strtok_r' to destroy
642 sstrncpy (file_copy, file_orig, sizeof (file_copy));
645 * Break into components. This will eat up several slashes in a row and
646 * remove leading and trailing slashes..
651 while ((fields[fields_num] = strtok_r (ptr, "/", &saveptr)) != NULL)
656 if (fields_num >= 16)
661 * For each component, do..
663 for (i = 0; i < (fields_num - last_is_file); i++)
666 * Do not create directories that start with a dot. This
667 * prevents `../../' attacks and other likely malicious
670 if (fields[i][0] == '.')
672 ERROR ("Cowardly refusing to create a directory that "
673 "begins with a `.' (dot): `%s'", file_orig);
678 * Join the components together again
681 if (strjoin (dir + path_is_absolute, (size_t) (dir_len - path_is_absolute),
682 fields, (size_t) (i + 1), "/") < 0)
684 ERROR ("strjoin failed: `%s', component #%i", file_orig, i);
689 if ((stat (dir, &statbuf) == -1)
690 && (lstat (dir, &statbuf) == -1))
694 if (mkdir (dir, S_IRWXU | S_IRWXG | S_IRWXO) == 0)
697 /* this might happen, if a different thread created
698 * the directory in the meantime
699 * => call stat() again to check for S_ISDIR() */
704 ERROR ("check_create_dir: mkdir (%s): %s", dir,
706 errbuf, sizeof (errbuf)));
712 ERROR ("check_create_dir: stat (%s): %s", dir,
713 sstrerror (errno, errbuf,
718 else if (!S_ISDIR (statbuf.st_mode))
720 ERROR ("check_create_dir: `%s' exists but is not "
721 "a directory!", dir);
729 } /* check_create_dir */
732 int get_kstat (kstat_t **ksp_ptr, char *module, int instance, char *name)
741 ssnprintf (ident, sizeof (ident), "%s,%i,%s", module, instance, name);
743 *ksp_ptr = kstat_lookup (kc, module, instance, name);
744 if (*ksp_ptr == NULL)
746 ERROR ("get_kstat: Cound not find kstat %s", ident);
750 if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED)
752 ERROR ("get_kstat: kstat %s has wrong type", ident);
758 assert (*ksp_ptr != NULL);
759 assert ((*ksp_ptr)->ks_type == KSTAT_TYPE_NAMED);
762 if (kstat_read (kc, *ksp_ptr, NULL) == -1)
764 ERROR ("get_kstat: kstat %s could not be read", ident);
768 if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED)
770 ERROR ("get_kstat: kstat %s has wrong type", ident);
777 long long get_kstat_value (kstat_t *ksp, char *name)
780 long long retval = -1LL;
784 ERROR ("get_kstat_value (\"%s\"): ksp is NULL.", name);
787 else if (ksp->ks_type != KSTAT_TYPE_NAMED)
789 ERROR ("get_kstat_value (\"%s\"): ksp->ks_type (%#x) "
790 "is not KSTAT_TYPE_NAMED (%#x).",
792 (unsigned int) ksp->ks_type,
793 (unsigned int) KSTAT_TYPE_NAMED);
797 if ((kn = (kstat_named_t *) kstat_data_lookup (ksp, name)) == NULL)
800 if (kn->data_type == KSTAT_DATA_INT32)
801 retval = (long long) kn->value.i32;
802 else if (kn->data_type == KSTAT_DATA_UINT32)
803 retval = (long long) kn->value.ui32;
804 else if (kn->data_type == KSTAT_DATA_INT64)
805 retval = (long long) kn->value.i64; /* According to ANSI C99 `long long' must hold at least 64 bits */
806 else if (kn->data_type == KSTAT_DATA_UINT64)
807 retval = (long long) kn->value.ui64; /* XXX: Might overflow! */
809 WARNING ("get_kstat_value: Not a numeric value: %s", name);
813 #endif /* HAVE_LIBKSTAT */
816 unsigned long long ntohll (unsigned long long n)
818 #if BYTE_ORDER == BIG_ENDIAN
821 return (((unsigned long long) ntohl (n)) << 32) + ntohl (n >> 32);
823 } /* unsigned long long ntohll */
825 unsigned long long htonll (unsigned long long n)
827 #if BYTE_ORDER == BIG_ENDIAN
830 return (((unsigned long long) htonl (n)) << 32) + htonl (n >> 32);
832 } /* unsigned long long htonll */
833 #endif /* HAVE_HTONLL */
835 #if FP_LAYOUT_NEED_NOTHING
836 /* Well, we need nothing.. */
837 /* #endif FP_LAYOUT_NEED_NOTHING */
839 #elif FP_LAYOUT_NEED_ENDIANFLIP || FP_LAYOUT_NEED_INTSWAP
840 # if FP_LAYOUT_NEED_ENDIANFLIP
841 # define FP_CONVERT(A) ((((uint64_t)(A) & 0xff00000000000000LL) >> 56) | \
842 (((uint64_t)(A) & 0x00ff000000000000LL) >> 40) | \
843 (((uint64_t)(A) & 0x0000ff0000000000LL) >> 24) | \
844 (((uint64_t)(A) & 0x000000ff00000000LL) >> 8) | \
845 (((uint64_t)(A) & 0x00000000ff000000LL) << 8) | \
846 (((uint64_t)(A) & 0x0000000000ff0000LL) << 24) | \
847 (((uint64_t)(A) & 0x000000000000ff00LL) << 40) | \
848 (((uint64_t)(A) & 0x00000000000000ffLL) << 56))
850 # define FP_CONVERT(A) ((((uint64_t)(A) & 0xffffffff00000000LL) >> 32) | \
851 (((uint64_t)(A) & 0x00000000ffffffffLL) << 32))
854 double ntohd (double d)
865 /* NAN in x86 byte order */
866 if ((ret.byte[0] == 0x00) && (ret.byte[1] == 0x00)
867 && (ret.byte[2] == 0x00) && (ret.byte[3] == 0x00)
868 && (ret.byte[4] == 0x00) && (ret.byte[5] == 0x00)
869 && (ret.byte[6] == 0xf8) && (ret.byte[7] == 0x7f))
878 ret.integer = FP_CONVERT (tmp);
879 return (ret.floating);
883 double htond (double d)
894 ret.byte[0] = ret.byte[1] = ret.byte[2] = ret.byte[3] = 0x00;
895 ret.byte[4] = ret.byte[5] = 0x00;
898 return (ret.floating);
905 tmp = FP_CONVERT (ret.integer);
907 return (ret.floating);
910 #endif /* FP_LAYOUT_NEED_ENDIANFLIP || FP_LAYOUT_NEED_INTSWAP */
912 int format_name (char *ret, int ret_len,
913 const char *hostname,
914 const char *plugin, const char *plugin_instance,
915 const char *type, const char *type_instance)
921 buffer_size = (size_t) ret_len;
923 #define APPEND(str) do { \
924 size_t l = strlen (str); \
925 if (l >= buffer_size) \
927 memcpy (buffer, (str), l); \
928 buffer += l; buffer_size -= l; \
931 assert (plugin != NULL);
932 assert (type != NULL);
937 if ((plugin_instance != NULL) && (plugin_instance[0] != 0))
940 APPEND (plugin_instance);
944 if ((type_instance != NULL) && (type_instance[0] != 0))
947 APPEND (type_instance);
949 assert (buffer_size > 0);
954 } /* int format_name */
956 int format_values (char *ret, size_t ret_len, /* {{{ */
957 const data_set_t *ds, const value_list_t *vl,
963 gauge_t *rates = NULL;
965 assert (0 == strcmp (ds->type, vl->type));
967 memset (ret, 0, ret_len);
969 #define BUFFER_ADD(...) do { \
970 status = ssnprintf (ret + offset, ret_len - offset, \
977 else if (((size_t) status) >= (ret_len - offset)) \
983 offset += ((size_t) status); \
986 BUFFER_ADD ("%.3f", CDTIME_T_TO_DOUBLE (vl->time));
988 for (i = 0; i < ds->ds_num; i++)
990 if (ds->ds[i].type == DS_TYPE_GAUGE)
991 BUFFER_ADD (":"GAUGE_FORMAT, vl->values[i].gauge);
992 else if (store_rates)
995 rates = uc_get_rate (ds, vl);
998 WARNING ("format_values: uc_get_rate failed.");
1001 BUFFER_ADD (":"GAUGE_FORMAT, rates[i]);
1003 else if (ds->ds[i].type == DS_TYPE_COUNTER)
1004 BUFFER_ADD (":%llu", vl->values[i].counter);
1005 else if (ds->ds[i].type == DS_TYPE_DERIVE)
1006 BUFFER_ADD (":%"PRIi64, vl->values[i].derive);
1007 else if (ds->ds[i].type == DS_TYPE_ABSOLUTE)
1008 BUFFER_ADD (":%"PRIu64, vl->values[i].absolute);
1011 ERROR ("format_values: Unknown data source type: %i",
1016 } /* for ds->ds_num */
1022 } /* }}} int format_values */
1024 int parse_identifier (char *str, char **ret_host,
1025 char **ret_plugin, char **ret_plugin_instance,
1026 char **ret_type, char **ret_type_instance)
1028 char *hostname = NULL;
1029 char *plugin = NULL;
1030 char *plugin_instance = NULL;
1032 char *type_instance = NULL;
1035 if (hostname == NULL)
1038 plugin = strchr (hostname, '/');
1041 *plugin = '\0'; plugin++;
1043 type = strchr (plugin, '/');
1046 *type = '\0'; type++;
1048 plugin_instance = strchr (plugin, '-');
1049 if (plugin_instance != NULL)
1051 *plugin_instance = '\0';
1055 type_instance = strchr (type, '-');
1056 if (type_instance != NULL)
1058 *type_instance = '\0';
1062 *ret_host = hostname;
1063 *ret_plugin = plugin;
1064 *ret_plugin_instance = plugin_instance;
1066 *ret_type_instance = type_instance;
1068 } /* int parse_identifier */
1070 int parse_identifier_vl (const char *str, value_list_t *vl) /* {{{ */
1072 char str_copy[6 * DATA_MAX_NAME_LEN];
1074 char *plugin = NULL;
1075 char *plugin_instance = NULL;
1077 char *type_instance = NULL;
1080 if ((str == NULL) || (vl == NULL))
1083 sstrncpy (str_copy, str, sizeof (str_copy));
1085 status = parse_identifier (str_copy, &host,
1086 &plugin, &plugin_instance,
1087 &type, &type_instance);
1091 sstrncpy (vl->host, host, sizeof (vl->host));
1092 sstrncpy (vl->plugin, plugin, sizeof (vl->plugin));
1093 sstrncpy (vl->plugin_instance,
1094 (plugin_instance != NULL) ? plugin_instance : "",
1095 sizeof (vl->plugin_instance));
1096 sstrncpy (vl->type, type, sizeof (vl->type));
1097 sstrncpy (vl->type_instance,
1098 (type_instance != NULL) ? type_instance : "",
1099 sizeof (vl->type_instance));
1102 } /* }}} int parse_identifier_vl */
1104 int parse_value (const char *value_orig, value_t *ret_value, int ds_type)
1107 char *endptr = NULL;
1110 if (value_orig == NULL)
1113 value = strdup (value_orig);
1116 value_len = strlen (value);
1118 while ((value_len > 0) && isspace ((int) value[value_len - 1]))
1120 value[value_len - 1] = 0;
1126 case DS_TYPE_COUNTER:
1127 ret_value->counter = (counter_t) strtoull (value, &endptr, 0);
1131 ret_value->gauge = (gauge_t) strtod (value, &endptr);
1134 case DS_TYPE_DERIVE:
1135 ret_value->derive = (derive_t) strtoll (value, &endptr, 0);
1138 case DS_TYPE_ABSOLUTE:
1139 ret_value->absolute = (absolute_t) strtoull (value, &endptr, 0);
1144 ERROR ("parse_value: Invalid data source type: %i.", ds_type);
1148 if (value == endptr) {
1149 ERROR ("parse_value: Failed to parse string as %s: %s.",
1150 DS_TYPE_TO_STRING (ds_type), value);
1154 else if ((NULL != endptr) && ('\0' != *endptr))
1155 INFO ("parse_value: Ignoring trailing garbage \"%s\" after %s value. "
1156 "Input string was \"%s\".",
1157 endptr, DS_TYPE_TO_STRING (ds_type), value_orig);
1161 } /* int parse_value */
1163 int parse_values (char *buffer, value_list_t *vl, const data_set_t *ds)
1170 if ((buffer == NULL) || (vl == NULL) || (ds == NULL))
1177 while ((ptr = strtok_r (dummy, ":", &saveptr)) != NULL)
1181 if (i >= vl->values_len)
1183 /* Make sure i is invalid. */
1190 if (strcmp ("N", ptr) == 0)
1191 vl->time = cdtime ();
1194 char *endptr = NULL;
1198 tmp = strtod (ptr, &endptr);
1199 if ((errno != 0) /* Overflow */
1200 || (endptr == ptr) /* Invalid string */
1201 || (endptr == NULL) /* This should not happen */
1202 || (*endptr != 0)) /* Trailing chars */
1205 vl->time = DOUBLE_TO_CDTIME_T (tmp);
1211 if ((strcmp ("U", ptr) == 0) && (ds->ds[i].type == DS_TYPE_GAUGE))
1212 vl->values[i].gauge = NAN;
1213 else if (0 != parse_value (ptr, &vl->values[i], ds->ds[i].type))
1217 } /* while (strtok_r) */
1219 if ((ptr != NULL) || (i == 0))
1222 } /* int parse_values */
1224 #if !HAVE_GETPWNAM_R
1225 int getpwnam_r (const char *name, struct passwd *pwbuf, char *buf,
1226 size_t buflen, struct passwd **pwbufp)
1231 memset (pwbuf, '\0', sizeof (struct passwd));
1233 pthread_mutex_lock (&getpwnam_r_lock);
1237 pw = getpwnam (name);
1240 status = (errno != 0) ? errno : ENOENT;
1244 #define GETPWNAM_COPY_MEMBER(member) \
1245 if (pw->member != NULL) \
1247 int len = strlen (pw->member); \
1248 if (len >= buflen) \
1253 sstrncpy (buf, pw->member, buflen); \
1254 pwbuf->member = buf; \
1256 buflen -= (len + 1); \
1258 GETPWNAM_COPY_MEMBER(pw_name);
1259 GETPWNAM_COPY_MEMBER(pw_passwd);
1260 GETPWNAM_COPY_MEMBER(pw_gecos);
1261 GETPWNAM_COPY_MEMBER(pw_dir);
1262 GETPWNAM_COPY_MEMBER(pw_shell);
1264 pwbuf->pw_uid = pw->pw_uid;
1265 pwbuf->pw_gid = pw->pw_gid;
1271 pthread_mutex_unlock (&getpwnam_r_lock);
1274 } /* int getpwnam_r */
1275 #endif /* !HAVE_GETPWNAM_R */
1277 int notification_init (notification_t *n, int severity, const char *message,
1279 const char *plugin, const char *plugin_instance,
1280 const char *type, const char *type_instance)
1282 memset (n, '\0', sizeof (notification_t));
1284 n->severity = severity;
1286 if (message != NULL)
1287 sstrncpy (n->message, message, sizeof (n->message));
1289 sstrncpy (n->host, host, sizeof (n->host));
1291 sstrncpy (n->plugin, plugin, sizeof (n->plugin));
1292 if (plugin_instance != NULL)
1293 sstrncpy (n->plugin_instance, plugin_instance,
1294 sizeof (n->plugin_instance));
1296 sstrncpy (n->type, type, sizeof (n->type));
1297 if (type_instance != NULL)
1298 sstrncpy (n->type_instance, type_instance,
1299 sizeof (n->type_instance));
1302 } /* int notification_init */
1304 int walk_directory (const char *dir, dirwalk_callback_f callback,
1305 void *user_data, int include_hidden)
1315 if ((dh = opendir (dir)) == NULL)
1318 ERROR ("walk_directory: Cannot open '%s': %s", dir,
1319 sstrerror (errno, errbuf, sizeof (errbuf)));
1323 while ((ent = readdir (dh)) != NULL)
1329 if ((strcmp (".", ent->d_name) == 0)
1330 || (strcmp ("..", ent->d_name) == 0))
1333 else /* if (!include_hidden) */
1335 if (ent->d_name[0]=='.')
1339 status = (*callback) (dir, ent->d_name, user_data);
1348 if ((success == 0) && (failure > 0))
1353 ssize_t read_file_contents (const char *filename, char *buf, size_t bufsize)
1358 fh = fopen (filename, "r");
1362 ret = (ssize_t) fread (buf, 1, bufsize, fh);
1363 if ((ret == 0) && (ferror (fh) != 0))
1365 ERROR ("read_file_contents: Reading file \"%s\" failed.",
1374 counter_t counter_diff (counter_t old_value, counter_t new_value)
1378 if (old_value > new_value)
1380 if (old_value <= 4294967295U)
1381 diff = (4294967295U - old_value) + new_value + 1;
1383 diff = (18446744073709551615ULL - old_value) + new_value + 1;
1387 diff = new_value - old_value;
1391 } /* counter_t counter_diff */
1393 int rate_to_value (value_t *ret_value, gauge_t rate, /* {{{ */
1394 rate_to_value_state_t *state,
1395 int ds_type, cdtime_t t)
1397 gauge_t delta_gauge;
1400 if (ds_type == DS_TYPE_GAUGE)
1402 state->last_value.gauge = rate;
1403 state->last_time = t;
1405 *ret_value = state->last_value;
1409 /* Counter and absolute can't handle negative rates. Reset "last time"
1410 * to zero, so that the next valid rate will re-initialize the
1413 && ((ds_type == DS_TYPE_COUNTER)
1414 || (ds_type == DS_TYPE_ABSOLUTE)))
1416 memset (state, 0, sizeof (*state));
1420 /* Another invalid state: The time is not increasing. */
1421 if (t <= state->last_time)
1423 memset (state, 0, sizeof (*state));
1427 delta_t = t - state->last_time;
1428 delta_gauge = (rate * CDTIME_T_TO_DOUBLE (delta_t)) + state->residual;
1430 /* Previous value is invalid. */
1431 if (state->last_time == 0) /* {{{ */
1433 if (ds_type == DS_TYPE_DERIVE)
1435 state->last_value.derive = (derive_t) rate;
1436 state->residual = rate - ((gauge_t) state->last_value.derive);
1438 else if (ds_type == DS_TYPE_COUNTER)
1440 state->last_value.counter = (counter_t) rate;
1441 state->residual = rate - ((gauge_t) state->last_value.counter);
1443 else if (ds_type == DS_TYPE_ABSOLUTE)
1445 state->last_value.absolute = (absolute_t) rate;
1446 state->residual = rate - ((gauge_t) state->last_value.absolute);
1453 state->last_time = t;
1457 if (ds_type == DS_TYPE_DERIVE)
1459 derive_t delta_derive = (derive_t) delta_gauge;
1461 state->last_value.derive += delta_derive;
1462 state->residual = delta_gauge - ((gauge_t) delta_derive);
1464 else if (ds_type == DS_TYPE_COUNTER)
1466 counter_t delta_counter = (counter_t) delta_gauge;
1468 state->last_value.counter += delta_counter;
1469 state->residual = delta_gauge - ((gauge_t) delta_counter);
1471 else if (ds_type == DS_TYPE_ABSOLUTE)
1473 absolute_t delta_absolute = (absolute_t) delta_gauge;
1475 state->last_value.absolute = delta_absolute;
1476 state->residual = delta_gauge - ((gauge_t) delta_absolute);
1483 state->last_time = t;
1484 *ret_value = state->last_value;
1486 } /* }}} value_t rate_to_value */
1488 int value_to_rate (gauge_t *ret_rate, /* {{{ */
1489 value_t value, int ds_type, cdtime_t t, value_to_rate_state_t *state)
1493 /* Another invalid state: The time is not increasing. */
1494 if (t <= state->last_time)
1496 memset (state, 0, sizeof (*state));
1500 interval = CDTIME_T_TO_DOUBLE(t - state->last_time);
1502 /* Previous value is invalid. */
1503 if (state->last_time == 0)
1505 state->last_value = value;
1506 state->last_time = t;
1511 case DS_TYPE_DERIVE: {
1512 derive_t diff = value.derive - state->last_value.derive;
1513 *ret_rate = ((gauge_t) diff) / ((gauge_t) interval);
1516 case DS_TYPE_GAUGE: {
1517 *ret_rate = value.gauge;
1520 case DS_TYPE_COUNTER: {
1521 counter_t diff = counter_diff (state->last_value.counter, value.counter);
1522 *ret_rate = ((gauge_t) diff) / ((gauge_t) interval);
1525 case DS_TYPE_ABSOLUTE: {
1526 absolute_t diff = value.absolute;
1527 *ret_rate = ((gauge_t) diff) / ((gauge_t) interval);
1534 state->last_value = value;
1535 state->last_time = t;
1537 } /* }}} value_t rate_to_value */
1539 int service_name_to_port_number (const char *service_name)
1541 struct addrinfo *ai_list;
1542 struct addrinfo *ai_ptr;
1543 struct addrinfo ai_hints;
1547 if (service_name == NULL)
1551 memset (&ai_hints, 0, sizeof (ai_hints));
1552 ai_hints.ai_family = AF_UNSPEC;
1554 status = getaddrinfo (/* node = */ NULL, service_name,
1555 &ai_hints, &ai_list);
1558 ERROR ("service_name_to_port_number: getaddrinfo failed: %s",
1559 gai_strerror (status));
1563 service_number = -1;
1564 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
1566 if (ai_ptr->ai_family == AF_INET)
1568 struct sockaddr_in *sa;
1570 sa = (void *) ai_ptr->ai_addr;
1571 service_number = (int) ntohs (sa->sin_port);
1573 else if (ai_ptr->ai_family == AF_INET6)
1575 struct sockaddr_in6 *sa;
1577 sa = (void *) ai_ptr->ai_addr;
1578 service_number = (int) ntohs (sa->sin6_port);
1581 if ((service_number > 0) && (service_number <= 65535))
1585 freeaddrinfo (ai_list);
1587 if ((service_number > 0) && (service_number <= 65535))
1588 return (service_number);
1590 } /* int service_name_to_port_number */
1592 int strtoderive (const char *string, derive_t *ret_value) /* {{{ */
1597 if ((string == NULL) || (ret_value == NULL))
1602 tmp = (derive_t) strtoll (string, &endptr, /* base = */ 0);
1603 if ((endptr == string) || (errno != 0))
1608 } /* }}} int strtoderive */
1610 int strtogauge (const char *string, gauge_t *ret_value) /* {{{ */
1613 char *endptr = NULL;
1615 if ((string == NULL) || (ret_value == NULL))
1620 tmp = (gauge_t) strtod (string, &endptr);
1623 else if ((endptr == NULL) || (*endptr != 0))
1628 } /* }}} int strtogauge */
1630 int strarray_add (char ***ret_array, size_t *ret_array_len, char const *str) /* {{{ */
1633 size_t array_len = *ret_array_len;
1638 array = realloc (*ret_array,
1639 (array_len + 1) * sizeof (*array));
1644 array[array_len] = strdup (str);
1645 if (array[array_len] == NULL)
1649 *ret_array_len = array_len;
1651 } /* }}} int strarray_add */
1653 void strarray_free (char **array, size_t array_len) /* {{{ */
1657 for (i = 0; i < array_len; i++)
1660 } /* }}} void strarray_free */