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>
38 #include "utils_cache.h"
45 #include <sys/types.h>
51 # include <netinet/in.h>
54 /* for ntohl and htonl */
56 # include <arpa/inet.h>
60 extern kstat_ctl_t *kc;
64 static pthread_mutex_t getpwnam_r_lock = PTHREAD_MUTEX_INITIALIZER;
68 static pthread_mutex_t strerror_r_lock = PTHREAD_MUTEX_INITIALIZER;
71 char *sstrncpy (char *dest, const char *src, size_t n)
73 strncpy (dest, src, n);
77 } /* char *sstrncpy */
79 int ssnprintf (char *dest, size_t n, const char *format, ...)
84 va_start (ap, format);
85 ret = vsnprintf (dest, n, format, ap);
92 char *ssnprintf_alloc (char const *format, ...) /* {{{ */
94 char static_buffer[1024] = "";
96 size_t alloc_buffer_size;
100 /* Try printing into the static buffer. In many cases it will be
101 * sufficiently large and we can simply return a strdup() of this
103 va_start (ap, format);
104 status = vsnprintf (static_buffer, sizeof (static_buffer), format, ap);
109 /* "status" does not include the null byte. */
110 alloc_buffer_size = (size_t) (status + 1);
111 if (alloc_buffer_size <= sizeof (static_buffer))
112 return (strdup (static_buffer));
114 /* Allocate a buffer large enough to hold the string. */
115 alloc_buffer = calloc (1, alloc_buffer_size);
116 if (alloc_buffer == NULL)
119 /* Print again into this new buffer. */
120 va_start (ap, format);
121 status = vsnprintf (alloc_buffer, alloc_buffer_size, format, ap);
125 sfree (alloc_buffer);
129 return (alloc_buffer);
130 } /* }}} char *ssnprintf_alloc */
132 char *sstrdup (const char *s)
140 /* Do not use `strdup' here, because it's not specified in POSIX. It's
141 * ``only'' an XSI extension. */
146 ERROR ("sstrdup: Out of memory.");
149 memcpy (r, s, sizeof (char) * sz);
152 } /* char *sstrdup */
154 /* Even though Posix requires "strerror_r" to return an "int",
155 * some systems (e.g. the GNU libc) return a "char *" _and_
156 * ignore the second argument ... -tokkee */
157 char *sstrerror (int errnum, char *buf, size_t buflen)
165 pthread_mutex_lock (&strerror_r_lock);
167 temp = strerror (errnum);
168 sstrncpy (buf, temp, buflen);
170 pthread_mutex_unlock (&strerror_r_lock);
172 /* #endif !HAVE_STRERROR_R */
174 #elif STRERROR_R_CHAR_P
177 temp = strerror_r (errnum, buf, buflen);
180 if ((temp != NULL) && (temp != buf) && (temp[0] != '\0'))
181 sstrncpy (buf, temp, buflen);
183 sstrncpy (buf, "strerror_r did not return "
184 "an error message", buflen);
187 /* #endif STRERROR_R_CHAR_P */
190 if (strerror_r (errnum, buf, buflen) != 0)
192 ssnprintf (buf, buflen, "Error #%i; "
193 "Additionally, strerror_r failed.",
196 #endif /* STRERROR_R_CHAR_P */
199 } /* char *sstrerror */
201 void *smalloc (size_t size)
205 if ((r = malloc (size)) == NULL)
207 ERROR ("Not enough memory.");
212 } /* void *smalloc */
215 void sfree (void **ptr)
227 ssize_t sread (int fd, void *buf, size_t count)
238 status = read (fd, (void *) ptr, nleft);
240 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
248 DEBUG ("Received EOF from fd %i. "
249 "Closing fd and returning error.",
255 assert ((0 > status) || (nleft >= (size_t)status));
257 nleft = nleft - ((size_t) status);
258 ptr = ptr + ((size_t) status);
265 ssize_t swrite (int fd, const void *buf, size_t count)
272 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 escape_string (char *buffer, size_t buffer_size)
382 /* Check if we need to escape at all first */
383 temp = strpbrk (buffer, " \t\"\\");
390 temp = calloc (1, buffer_size);
397 for (i = 0; i < buffer_size; i++)
403 else if ((buffer[i] == '"') || (buffer[i] == '\\'))
405 if (j > (buffer_size - 4))
408 temp[j + 1] = buffer[i];
413 if (j > (buffer_size - 3))
420 assert ((j + 1) < buffer_size);
424 sstrncpy (buffer, temp, buffer_size);
427 } /* int escape_string */
429 int strunescape (char *buf, size_t buf_len)
433 for (i = 0; (i < buf_len) && (buf[i] != '\0'); ++i)
438 if (((i + 1) >= buf_len) || (buf[i + 1] == 0)) {
439 ERROR ("string unescape: backslash found at end of string.");
440 /* Ensure null-byte at the end of the buffer. */
445 switch (buf[i + 1]) {
460 /* Move everything after the position one position to the left.
461 * Add a null-byte as last character in the buffer. */
462 memmove (buf + i + 1, buf + i + 2, buf_len - i - 2);
463 buf[buf_len - 1] = 0;
466 } /* int strunescape */
468 size_t strstripnewline (char *buffer)
470 size_t buffer_len = strlen (buffer);
472 while (buffer_len > 0)
474 if ((buffer[buffer_len - 1] != '\n')
475 && (buffer[buffer_len - 1] != '\r'))
478 buffer[buffer_len] = 0;
482 } /* size_t strstripnewline */
484 int escape_slashes (char *buffer, size_t buffer_size)
489 buffer_len = strlen (buffer);
493 if (strcmp ("/", buffer) == 0)
497 sstrncpy (buffer, "root", buffer_size);
502 /* Move one to the left */
503 if (buffer[0] == '/')
505 memmove (buffer, buffer + 1, buffer_len);
509 for (i = 0; i < buffer_len; i++)
511 if (buffer[i] == '/')
516 } /* int escape_slashes */
518 void replace_special (char *buffer, size_t buffer_size)
522 for (i = 0; i < buffer_size; i++)
526 if ((!isalnum ((int) buffer[i])) && (buffer[i] != '-'))
529 } /* void replace_special */
531 int timeval_cmp (struct timeval tv0, struct timeval tv1, struct timeval *delta)
533 struct timeval *larger;
534 struct timeval *smaller;
538 NORMALIZE_TIMEVAL (tv0);
539 NORMALIZE_TIMEVAL (tv1);
541 if ((tv0.tv_sec == tv1.tv_sec) && (tv0.tv_usec == tv1.tv_usec))
550 if ((tv0.tv_sec < tv1.tv_sec)
551 || ((tv0.tv_sec == tv1.tv_sec) && (tv0.tv_usec < tv1.tv_usec)))
565 delta->tv_sec = larger->tv_sec - smaller->tv_sec;
567 if (smaller->tv_usec <= larger->tv_usec)
568 delta->tv_usec = larger->tv_usec - smaller->tv_usec;
572 delta->tv_usec = 1000000 + larger->tv_usec - smaller->tv_usec;
576 assert ((delta == NULL)
577 || ((0 <= delta->tv_usec) && (delta->tv_usec < 1000000)));
580 } /* int timeval_cmp */
582 int check_create_dir (const char *file_orig)
593 int last_is_file = 1;
594 int path_is_absolute = 0;
599 * Sanity checks first
601 if (file_orig == NULL)
604 if ((len = strlen (file_orig)) < 1)
606 else if (len >= sizeof (file_copy))
610 * If `file_orig' ends in a slash the last component is a directory,
611 * otherwise it's a file. Act accordingly..
613 if (file_orig[len - 1] == '/')
615 if (file_orig[0] == '/')
616 path_is_absolute = 1;
619 * Create a copy for `strtok_r' to destroy
621 sstrncpy (file_copy, file_orig, sizeof (file_copy));
624 * Break into components. This will eat up several slashes in a row and
625 * remove leading and trailing slashes..
630 while ((fields[fields_num] = strtok_r (ptr, "/", &saveptr)) != NULL)
635 if (fields_num >= 16)
640 * For each component, do..
642 for (i = 0; i < (fields_num - last_is_file); i++)
645 * Do not create directories that start with a dot. This
646 * prevents `../../' attacks and other likely malicious
649 if (fields[i][0] == '.')
651 ERROR ("Cowardly refusing to create a directory that "
652 "begins with a `.' (dot): `%s'", file_orig);
657 * Join the components together again
660 if (strjoin (dir + path_is_absolute, (size_t) (dir_len - path_is_absolute),
661 fields, (size_t) (i + 1), "/") < 0)
663 ERROR ("strjoin failed: `%s', component #%i", file_orig, i);
668 if ((stat (dir, &statbuf) == -1)
669 && (lstat (dir, &statbuf) == -1))
673 if (mkdir (dir, S_IRWXU | S_IRWXG | S_IRWXO) == 0)
676 /* this might happen, if a different thread created
677 * the directory in the meantime
678 * => call stat() again to check for S_ISDIR() */
683 ERROR ("check_create_dir: mkdir (%s): %s", dir,
685 errbuf, sizeof (errbuf)));
691 ERROR ("check_create_dir: stat (%s): %s", dir,
692 sstrerror (errno, errbuf,
697 else if (!S_ISDIR (statbuf.st_mode))
699 ERROR ("check_create_dir: `%s' exists but is not "
700 "a directory!", dir);
708 } /* check_create_dir */
711 int get_kstat (kstat_t **ksp_ptr, char *module, int instance, char *name)
720 ssnprintf (ident, sizeof (ident), "%s,%i,%s", module, instance, name);
722 *ksp_ptr = kstat_lookup (kc, module, instance, name);
723 if (*ksp_ptr == NULL)
725 ERROR ("get_kstat: Cound not find kstat %s", ident);
729 if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED)
731 ERROR ("get_kstat: kstat %s has wrong type", ident);
737 assert (*ksp_ptr != NULL);
738 assert ((*ksp_ptr)->ks_type == KSTAT_TYPE_NAMED);
741 if (kstat_read (kc, *ksp_ptr, NULL) == -1)
743 ERROR ("get_kstat: kstat %s could not be read", ident);
747 if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED)
749 ERROR ("get_kstat: kstat %s has wrong type", ident);
756 long long get_kstat_value (kstat_t *ksp, char *name)
759 long long retval = -1LL;
763 ERROR ("get_kstat_value (\"%s\"): ksp is NULL.", name);
766 else if (ksp->ks_type != KSTAT_TYPE_NAMED)
768 ERROR ("get_kstat_value (\"%s\"): ksp->ks_type (%#x) "
769 "is not KSTAT_TYPE_NAMED (%#x).",
771 (unsigned int) ksp->ks_type,
772 (unsigned int) KSTAT_TYPE_NAMED);
776 if ((kn = (kstat_named_t *) kstat_data_lookup (ksp, name)) == NULL)
779 if (kn->data_type == KSTAT_DATA_INT32)
780 retval = (long long) kn->value.i32;
781 else if (kn->data_type == KSTAT_DATA_UINT32)
782 retval = (long long) kn->value.ui32;
783 else if (kn->data_type == KSTAT_DATA_INT64)
784 retval = (long long) kn->value.i64; /* According to ANSI C99 `long long' must hold at least 64 bits */
785 else if (kn->data_type == KSTAT_DATA_UINT64)
786 retval = (long long) kn->value.ui64; /* XXX: Might overflow! */
788 WARNING ("get_kstat_value: Not a numeric value: %s", name);
792 #endif /* HAVE_LIBKSTAT */
795 unsigned long long ntohll (unsigned long long n)
797 #if BYTE_ORDER == BIG_ENDIAN
800 return (((unsigned long long) ntohl (n)) << 32) + ntohl (n >> 32);
802 } /* unsigned long long ntohll */
804 unsigned long long htonll (unsigned long long n)
806 #if BYTE_ORDER == BIG_ENDIAN
809 return (((unsigned long long) htonl (n)) << 32) + htonl (n >> 32);
811 } /* unsigned long long htonll */
812 #endif /* HAVE_HTONLL */
814 #if FP_LAYOUT_NEED_NOTHING
815 /* Well, we need nothing.. */
816 /* #endif FP_LAYOUT_NEED_NOTHING */
818 #elif FP_LAYOUT_NEED_ENDIANFLIP || FP_LAYOUT_NEED_INTSWAP
819 # if FP_LAYOUT_NEED_ENDIANFLIP
820 # define FP_CONVERT(A) ((((uint64_t)(A) & 0xff00000000000000LL) >> 56) | \
821 (((uint64_t)(A) & 0x00ff000000000000LL) >> 40) | \
822 (((uint64_t)(A) & 0x0000ff0000000000LL) >> 24) | \
823 (((uint64_t)(A) & 0x000000ff00000000LL) >> 8) | \
824 (((uint64_t)(A) & 0x00000000ff000000LL) << 8) | \
825 (((uint64_t)(A) & 0x0000000000ff0000LL) << 24) | \
826 (((uint64_t)(A) & 0x000000000000ff00LL) << 40) | \
827 (((uint64_t)(A) & 0x00000000000000ffLL) << 56))
829 # define FP_CONVERT(A) ((((uint64_t)(A) & 0xffffffff00000000LL) >> 32) | \
830 (((uint64_t)(A) & 0x00000000ffffffffLL) << 32))
833 double ntohd (double d)
844 /* NAN in x86 byte order */
845 if ((ret.byte[0] == 0x00) && (ret.byte[1] == 0x00)
846 && (ret.byte[2] == 0x00) && (ret.byte[3] == 0x00)
847 && (ret.byte[4] == 0x00) && (ret.byte[5] == 0x00)
848 && (ret.byte[6] == 0xf8) && (ret.byte[7] == 0x7f))
857 ret.integer = FP_CONVERT (tmp);
858 return (ret.floating);
862 double htond (double d)
873 ret.byte[0] = ret.byte[1] = ret.byte[2] = ret.byte[3] = 0x00;
874 ret.byte[4] = ret.byte[5] = 0x00;
877 return (ret.floating);
884 tmp = FP_CONVERT (ret.integer);
886 return (ret.floating);
889 #endif /* FP_LAYOUT_NEED_ENDIANFLIP || FP_LAYOUT_NEED_INTSWAP */
891 int format_name (char *ret, int ret_len,
892 const char *hostname,
893 const char *plugin, const char *plugin_instance,
894 const char *type, const char *type_instance)
900 buffer_size = (size_t) ret_len;
902 #define APPEND(str) do { \
903 size_t l = strlen (str); \
904 if (l >= buffer_size) \
906 memcpy (buffer, (str), l); \
907 buffer += l; buffer_size -= l; \
910 assert (plugin != NULL);
911 assert (type != NULL);
916 if ((plugin_instance != NULL) && (plugin_instance[0] != 0))
919 APPEND (plugin_instance);
923 if ((type_instance != NULL) && (type_instance[0] != 0))
926 APPEND (type_instance);
928 assert (buffer_size > 0);
933 } /* int format_name */
935 int format_values (char *ret, size_t ret_len, /* {{{ */
936 const data_set_t *ds, const value_list_t *vl,
942 gauge_t *rates = NULL;
944 assert (0 == strcmp (ds->type, vl->type));
946 memset (ret, 0, ret_len);
948 #define BUFFER_ADD(...) do { \
949 status = ssnprintf (ret + offset, ret_len - offset, \
956 else if (((size_t) status) >= (ret_len - offset)) \
962 offset += ((size_t) status); \
965 BUFFER_ADD ("%.3f", CDTIME_T_TO_DOUBLE (vl->time));
967 for (i = 0; i < ds->ds_num; i++)
969 if (ds->ds[i].type == DS_TYPE_GAUGE)
970 BUFFER_ADD (":"GAUGE_FORMAT, vl->values[i].gauge);
971 else if (store_rates)
974 rates = uc_get_rate (ds, vl);
977 WARNING ("format_values: uc_get_rate failed.");
980 BUFFER_ADD (":"GAUGE_FORMAT, rates[i]);
982 else if (ds->ds[i].type == DS_TYPE_COUNTER)
983 BUFFER_ADD (":%llu", vl->values[i].counter);
984 else if (ds->ds[i].type == DS_TYPE_DERIVE)
985 BUFFER_ADD (":%"PRIi64, vl->values[i].derive);
986 else if (ds->ds[i].type == DS_TYPE_ABSOLUTE)
987 BUFFER_ADD (":%"PRIu64, vl->values[i].absolute);
990 ERROR ("format_values: Unknown data source type: %i",
995 } /* for ds->ds_num */
1001 } /* }}} int format_values */
1003 int parse_identifier (char *str, char **ret_host,
1004 char **ret_plugin, char **ret_plugin_instance,
1005 char **ret_type, char **ret_type_instance)
1007 char *hostname = NULL;
1008 char *plugin = NULL;
1009 char *plugin_instance = NULL;
1011 char *type_instance = NULL;
1014 if (hostname == NULL)
1017 plugin = strchr (hostname, '/');
1020 *plugin = '\0'; plugin++;
1022 type = strchr (plugin, '/');
1025 *type = '\0'; type++;
1027 plugin_instance = strchr (plugin, '-');
1028 if (plugin_instance != NULL)
1030 *plugin_instance = '\0';
1034 type_instance = strchr (type, '-');
1035 if (type_instance != NULL)
1037 *type_instance = '\0';
1041 *ret_host = hostname;
1042 *ret_plugin = plugin;
1043 *ret_plugin_instance = plugin_instance;
1045 *ret_type_instance = type_instance;
1047 } /* int parse_identifier */
1049 int parse_identifier_vl (const char *str, value_list_t *vl) /* {{{ */
1051 char str_copy[6 * DATA_MAX_NAME_LEN];
1053 char *plugin = NULL;
1054 char *plugin_instance = NULL;
1056 char *type_instance = NULL;
1059 if ((str == NULL) || (vl == NULL))
1062 sstrncpy (str_copy, str, sizeof (str_copy));
1064 status = parse_identifier (str_copy, &host,
1065 &plugin, &plugin_instance,
1066 &type, &type_instance);
1070 sstrncpy (vl->host, host, sizeof (vl->host));
1071 sstrncpy (vl->plugin, plugin, sizeof (vl->plugin));
1072 sstrncpy (vl->plugin_instance,
1073 (plugin_instance != NULL) ? plugin_instance : "",
1074 sizeof (vl->plugin_instance));
1075 sstrncpy (vl->type, type, sizeof (vl->type));
1076 sstrncpy (vl->type_instance,
1077 (type_instance != NULL) ? type_instance : "",
1078 sizeof (vl->type_instance));
1081 } /* }}} int parse_identifier_vl */
1083 int parse_value (const char *value_orig, value_t *ret_value, int ds_type)
1086 char *endptr = NULL;
1089 if (value_orig == NULL)
1092 value = strdup (value_orig);
1095 value_len = strlen (value);
1097 while ((value_len > 0) && isspace ((int) value[value_len - 1]))
1099 value[value_len - 1] = 0;
1105 case DS_TYPE_COUNTER:
1106 ret_value->counter = (counter_t) strtoull (value, &endptr, 0);
1110 ret_value->gauge = (gauge_t) strtod (value, &endptr);
1113 case DS_TYPE_DERIVE:
1114 ret_value->derive = (derive_t) strtoll (value, &endptr, 0);
1117 case DS_TYPE_ABSOLUTE:
1118 ret_value->absolute = (absolute_t) strtoull (value, &endptr, 0);
1123 ERROR ("parse_value: Invalid data source type: %i.", ds_type);
1127 if (value == endptr) {
1128 ERROR ("parse_value: Failed to parse string as %s: %s.",
1129 DS_TYPE_TO_STRING (ds_type), value);
1133 else if ((NULL != endptr) && ('\0' != *endptr))
1134 INFO ("parse_value: Ignoring trailing garbage \"%s\" after %s value. "
1135 "Input string was \"%s\".",
1136 endptr, DS_TYPE_TO_STRING (ds_type), value_orig);
1140 } /* int parse_value */
1142 int parse_values (char *buffer, value_list_t *vl, const data_set_t *ds)
1149 if ((buffer == NULL) || (vl == NULL) || (ds == NULL))
1156 while ((ptr = strtok_r (dummy, ":", &saveptr)) != NULL)
1160 if (i >= vl->values_len)
1162 /* Make sure i is invalid. */
1169 if (strcmp ("N", ptr) == 0)
1170 vl->time = cdtime ();
1173 char *endptr = NULL;
1177 tmp = strtod (ptr, &endptr);
1178 if ((errno != 0) /* Overflow */
1179 || (endptr == ptr) /* Invalid string */
1180 || (endptr == NULL) /* This should not happen */
1181 || (*endptr != 0)) /* Trailing chars */
1184 vl->time = DOUBLE_TO_CDTIME_T (tmp);
1190 if ((strcmp ("U", ptr) == 0) && (ds->ds[i].type == DS_TYPE_GAUGE))
1191 vl->values[i].gauge = NAN;
1192 else if (0 != parse_value (ptr, &vl->values[i], ds->ds[i].type))
1196 } /* while (strtok_r) */
1198 if ((ptr != NULL) || (i == 0))
1201 } /* int parse_values */
1203 #if !HAVE_GETPWNAM_R
1204 int getpwnam_r (const char *name, struct passwd *pwbuf, char *buf,
1205 size_t buflen, struct passwd **pwbufp)
1210 memset (pwbuf, '\0', sizeof (struct passwd));
1212 pthread_mutex_lock (&getpwnam_r_lock);
1216 pw = getpwnam (name);
1219 status = (errno != 0) ? errno : ENOENT;
1223 #define GETPWNAM_COPY_MEMBER(member) \
1224 if (pw->member != NULL) \
1226 int len = strlen (pw->member); \
1227 if (len >= buflen) \
1232 sstrncpy (buf, pw->member, buflen); \
1233 pwbuf->member = buf; \
1235 buflen -= (len + 1); \
1237 GETPWNAM_COPY_MEMBER(pw_name);
1238 GETPWNAM_COPY_MEMBER(pw_passwd);
1239 GETPWNAM_COPY_MEMBER(pw_gecos);
1240 GETPWNAM_COPY_MEMBER(pw_dir);
1241 GETPWNAM_COPY_MEMBER(pw_shell);
1243 pwbuf->pw_uid = pw->pw_uid;
1244 pwbuf->pw_gid = pw->pw_gid;
1250 pthread_mutex_unlock (&getpwnam_r_lock);
1253 } /* int getpwnam_r */
1254 #endif /* !HAVE_GETPWNAM_R */
1256 int notification_init (notification_t *n, int severity, const char *message,
1258 const char *plugin, const char *plugin_instance,
1259 const char *type, const char *type_instance)
1261 memset (n, '\0', sizeof (notification_t));
1263 n->severity = severity;
1265 if (message != NULL)
1266 sstrncpy (n->message, message, sizeof (n->message));
1268 sstrncpy (n->host, host, sizeof (n->host));
1270 sstrncpy (n->plugin, plugin, sizeof (n->plugin));
1271 if (plugin_instance != NULL)
1272 sstrncpy (n->plugin_instance, plugin_instance,
1273 sizeof (n->plugin_instance));
1275 sstrncpy (n->type, type, sizeof (n->type));
1276 if (type_instance != NULL)
1277 sstrncpy (n->type_instance, type_instance,
1278 sizeof (n->type_instance));
1281 } /* int notification_init */
1283 int walk_directory (const char *dir, dirwalk_callback_f callback,
1284 void *user_data, int include_hidden)
1294 if ((dh = opendir (dir)) == NULL)
1297 ERROR ("walk_directory: Cannot open '%s': %s", dir,
1298 sstrerror (errno, errbuf, sizeof (errbuf)));
1302 while ((ent = readdir (dh)) != NULL)
1308 if ((strcmp (".", ent->d_name) == 0)
1309 || (strcmp ("..", ent->d_name) == 0))
1312 else /* if (!include_hidden) */
1314 if (ent->d_name[0]=='.')
1318 status = (*callback) (dir, ent->d_name, user_data);
1327 if ((success == 0) && (failure > 0))
1332 ssize_t read_file_contents (const char *filename, char *buf, size_t bufsize)
1337 fh = fopen (filename, "r");
1341 ret = (ssize_t) fread (buf, 1, bufsize, fh);
1342 if ((ret == 0) && (ferror (fh) != 0))
1344 ERROR ("read_file_contents: Reading file \"%s\" failed.",
1353 counter_t counter_diff (counter_t old_value, counter_t new_value)
1357 if (old_value > new_value)
1359 if (old_value <= 4294967295U)
1360 diff = (4294967295U - old_value) + new_value + 1;
1362 diff = (18446744073709551615ULL - old_value) + new_value + 1;
1366 diff = new_value - old_value;
1370 } /* counter_t counter_diff */
1372 int rate_to_value (value_t *ret_value, gauge_t rate, /* {{{ */
1373 rate_to_value_state_t *state,
1374 int ds_type, cdtime_t t)
1376 gauge_t delta_gauge;
1379 if (ds_type == DS_TYPE_GAUGE)
1381 state->last_value.gauge = rate;
1382 state->last_time = t;
1384 *ret_value = state->last_value;
1388 /* Counter and absolute can't handle negative rates. Reset "last time"
1389 * to zero, so that the next valid rate will re-initialize the
1392 && ((ds_type == DS_TYPE_COUNTER)
1393 || (ds_type == DS_TYPE_ABSOLUTE)))
1395 memset (state, 0, sizeof (*state));
1399 /* Another invalid state: The time is not increasing. */
1400 if (t <= state->last_time)
1402 memset (state, 0, sizeof (*state));
1406 delta_t = t - state->last_time;
1407 delta_gauge = (rate * CDTIME_T_TO_DOUBLE (delta_t)) + state->residual;
1409 /* Previous value is invalid. */
1410 if (state->last_time == 0) /* {{{ */
1412 if (ds_type == DS_TYPE_DERIVE)
1414 state->last_value.derive = (derive_t) rate;
1415 state->residual = rate - ((gauge_t) state->last_value.derive);
1417 else if (ds_type == DS_TYPE_COUNTER)
1419 state->last_value.counter = (counter_t) rate;
1420 state->residual = rate - ((gauge_t) state->last_value.counter);
1422 else if (ds_type == DS_TYPE_ABSOLUTE)
1424 state->last_value.absolute = (absolute_t) rate;
1425 state->residual = rate - ((gauge_t) state->last_value.absolute);
1432 state->last_time = t;
1436 if (ds_type == DS_TYPE_DERIVE)
1438 derive_t delta_derive = (derive_t) delta_gauge;
1440 state->last_value.derive += delta_derive;
1441 state->residual = delta_gauge - ((gauge_t) delta_derive);
1443 else if (ds_type == DS_TYPE_COUNTER)
1445 counter_t delta_counter = (counter_t) delta_gauge;
1447 state->last_value.counter += delta_counter;
1448 state->residual = delta_gauge - ((gauge_t) delta_counter);
1450 else if (ds_type == DS_TYPE_ABSOLUTE)
1452 absolute_t delta_absolute = (absolute_t) delta_gauge;
1454 state->last_value.absolute = delta_absolute;
1455 state->residual = delta_gauge - ((gauge_t) delta_absolute);
1462 state->last_time = t;
1463 *ret_value = state->last_value;
1465 } /* }}} value_t rate_to_value */
1467 int value_to_rate (gauge_t *ret_rate, /* {{{ */
1468 value_t value, int ds_type, cdtime_t t, value_to_rate_state_t *state)
1472 /* Another invalid state: The time is not increasing. */
1473 if (t <= state->last_time)
1475 memset (state, 0, sizeof (*state));
1479 interval = CDTIME_T_TO_DOUBLE(t - state->last_time);
1481 /* Previous value is invalid. */
1482 if (state->last_time == 0)
1484 state->last_value = value;
1485 state->last_time = t;
1490 case DS_TYPE_DERIVE: {
1491 derive_t diff = value.derive - state->last_value.derive;
1492 *ret_rate = ((gauge_t) diff) / ((gauge_t) interval);
1495 case DS_TYPE_GAUGE: {
1496 *ret_rate = value.gauge;
1499 case DS_TYPE_COUNTER: {
1500 counter_t diff = counter_diff (state->last_value.counter, value.counter);
1501 *ret_rate = ((gauge_t) diff) / ((gauge_t) interval);
1504 case DS_TYPE_ABSOLUTE: {
1505 absolute_t diff = value.absolute;
1506 *ret_rate = ((gauge_t) diff) / ((gauge_t) interval);
1513 state->last_value = value;
1514 state->last_time = t;
1516 } /* }}} value_t rate_to_value */
1518 int service_name_to_port_number (const char *service_name)
1520 struct addrinfo *ai_list;
1521 struct addrinfo *ai_ptr;
1525 if (service_name == NULL)
1528 struct addrinfo ai_hints = {
1529 .ai_family = AF_UNSPEC
1532 status = getaddrinfo (/* node = */ NULL, service_name,
1533 &ai_hints, &ai_list);
1536 ERROR ("service_name_to_port_number: getaddrinfo failed: %s",
1537 gai_strerror (status));
1541 service_number = -1;
1542 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
1544 if (ai_ptr->ai_family == AF_INET)
1546 struct sockaddr_in *sa;
1548 sa = (void *) ai_ptr->ai_addr;
1549 service_number = (int) ntohs (sa->sin_port);
1551 else if (ai_ptr->ai_family == AF_INET6)
1553 struct sockaddr_in6 *sa;
1555 sa = (void *) ai_ptr->ai_addr;
1556 service_number = (int) ntohs (sa->sin6_port);
1559 if ((service_number > 0) && (service_number <= 65535))
1563 freeaddrinfo (ai_list);
1565 if ((service_number > 0) && (service_number <= 65535))
1566 return (service_number);
1568 } /* int service_name_to_port_number */
1570 int strtoderive (const char *string, derive_t *ret_value) /* {{{ */
1575 if ((string == NULL) || (ret_value == NULL))
1580 tmp = (derive_t) strtoll (string, &endptr, /* base = */ 0);
1581 if ((endptr == string) || (errno != 0))
1586 } /* }}} int strtoderive */
1588 int strtogauge (const char *string, gauge_t *ret_value) /* {{{ */
1591 char *endptr = NULL;
1593 if ((string == NULL) || (ret_value == NULL))
1598 tmp = (gauge_t) strtod (string, &endptr);
1601 else if ((endptr == NULL) || (*endptr != 0))
1606 } /* }}} int strtogauge */
1608 int strarray_add (char ***ret_array, size_t *ret_array_len, char const *str) /* {{{ */
1611 size_t array_len = *ret_array_len;
1616 array = realloc (*ret_array,
1617 (array_len + 1) * sizeof (*array));
1622 array[array_len] = strdup (str);
1623 if (array[array_len] == NULL)
1627 *ret_array_len = array_len;
1629 } /* }}} int strarray_add */
1631 void strarray_free (char **array, size_t array_len) /* {{{ */
1635 for (i = 0; i < array_len; i++)
1638 } /* }}} void strarray_free */