+++ /dev/null
-/**
- * collectd - src/common.c
- * Copyright (C) 2005-2014 Florian octo Forster
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- *
- * Authors:
- * Florian octo Forster <octo at collectd.org>
- * Niki W. Waibel <niki.waibel@gmx.net>
- * Sebastian Harl <sh at tokkee.org>
- * Michał Mirosław <mirq-linux at rere.qmqm.pl>
-**/
-
-#if HAVE_CONFIG_H
-# include "config.h"
-#endif
-
-#include "collectd.h"
-#include "common.h"
-#include "plugin.h"
-#include "utils_cache.h"
-
-#if HAVE_PTHREAD_H
-# include <pthread.h>
-#endif
-
-#ifdef HAVE_MATH_H
-# include <math.h>
-#endif
-
-/* for getaddrinfo */
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netdb.h>
-
-#if HAVE_NETINET_IN_H
-# include <netinet/in.h>
-#endif
-
-/* for ntohl and htonl */
-#if HAVE_ARPA_INET_H
-# include <arpa/inet.h>
-#endif
-
-#ifdef HAVE_LIBKSTAT
-extern kstat_ctl_t *kc;
-#endif
-
-#if !HAVE_GETPWNAM_R
-static pthread_mutex_t getpwnam_r_lock = PTHREAD_MUTEX_INITIALIZER;
-#endif
-
-#if !HAVE_STRERROR_R
-static pthread_mutex_t strerror_r_lock = PTHREAD_MUTEX_INITIALIZER;
-#endif
-
-char *sstrncpy (char *dest, const char *src, size_t n)
-{
- strncpy (dest, src, n);
- dest[n - 1] = '\0';
-
- return (dest);
-} /* char *sstrncpy */
-
-int ssnprintf (char *dest, size_t n, const char *format, ...)
-{
- int ret = 0;
- va_list ap;
-
- va_start (ap, format);
- ret = vsnprintf (dest, n, format, ap);
- dest[n - 1] = '\0';
- va_end (ap);
-
- return (ret);
-} /* int ssnprintf */
-
-char *ssnprintf_alloc (char const *format, ...) /* {{{ */
-{
- char static_buffer[1024] = "";
- char *alloc_buffer;
- size_t alloc_buffer_size;
- int status;
- va_list ap;
-
- /* Try printing into the static buffer. In many cases it will be
- * sufficiently large and we can simply return a strdup() of this
- * buffer. */
- va_start (ap, format);
- status = vsnprintf (static_buffer, sizeof (static_buffer), format, ap);
- va_end (ap);
- if (status < 0)
- return (NULL);
-
- /* "status" does not include the null byte. */
- alloc_buffer_size = (size_t) (status + 1);
- if (alloc_buffer_size <= sizeof (static_buffer))
- return (strdup (static_buffer));
-
- /* Allocate a buffer large enough to hold the string. */
- alloc_buffer = malloc (alloc_buffer_size);
- if (alloc_buffer == NULL)
- return (NULL);
- memset (alloc_buffer, 0, alloc_buffer_size);
-
- /* Print again into this new buffer. */
- va_start (ap, format);
- status = vsnprintf (alloc_buffer, alloc_buffer_size, format, ap);
- va_end (ap);
- if (status < 0)
- {
- sfree (alloc_buffer);
- return (NULL);
- }
-
- return (alloc_buffer);
-} /* }}} char *ssnprintf_alloc */
-
-char *sstrdup (const char *s)
-{
- char *r;
- size_t sz;
-
- if (s == NULL)
- return (NULL);
-
- /* Do not use `strdup' here, because it's not specified in POSIX. It's
- * ``only'' an XSI extension. */
- sz = strlen (s) + 1;
- r = (char *) malloc (sizeof (char) * sz);
- if (r == NULL)
- {
- ERROR ("sstrdup: Out of memory.");
- exit (3);
- }
- memcpy (r, s, sizeof (char) * sz);
-
- return (r);
-} /* char *sstrdup */
-
-/* Even though Posix requires "strerror_r" to return an "int",
- * some systems (e.g. the GNU libc) return a "char *" _and_
- * ignore the second argument ... -tokkee */
-char *sstrerror (int errnum, char *buf, size_t buflen)
-{
- buf[0] = '\0';
-
-#if !HAVE_STRERROR_R
- {
- char *temp;
-
- pthread_mutex_lock (&strerror_r_lock);
-
- temp = strerror (errnum);
- sstrncpy (buf, temp, buflen);
-
- pthread_mutex_unlock (&strerror_r_lock);
- }
-/* #endif !HAVE_STRERROR_R */
-
-#elif STRERROR_R_CHAR_P
- {
- char *temp;
- temp = strerror_r (errnum, buf, buflen);
- if (buf[0] == '\0')
- {
- if ((temp != NULL) && (temp != buf) && (temp[0] != '\0'))
- sstrncpy (buf, temp, buflen);
- else
- sstrncpy (buf, "strerror_r did not return "
- "an error message", buflen);
- }
- }
-/* #endif STRERROR_R_CHAR_P */
-
-#else
- if (strerror_r (errnum, buf, buflen) != 0)
- {
- ssnprintf (buf, buflen, "Error #%i; "
- "Additionally, strerror_r failed.",
- errnum);
- }
-#endif /* STRERROR_R_CHAR_P */
-
- return (buf);
-} /* char *sstrerror */
-
-void *smalloc (size_t size)
-{
- void *r;
-
- if ((r = malloc (size)) == NULL)
- {
- ERROR ("Not enough memory.");
- exit (3);
- }
-
- return (r);
-} /* void *smalloc */
-
-#if 0
-void sfree (void **ptr)
-{
- if (ptr == NULL)
- return;
-
- if (*ptr != NULL)
- free (*ptr);
-
- *ptr = NULL;
-}
-#endif
-
-ssize_t sread (int fd, void *buf, size_t count)
-{
- char *ptr;
- size_t nleft;
- ssize_t status;
-
- ptr = (char *) buf;
- nleft = count;
-
- while (nleft > 0)
- {
- status = read (fd, (void *) ptr, nleft);
-
- if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
- continue;
-
- if (status < 0)
- return (status);
-
- if (status == 0)
- {
- DEBUG ("Received EOF from fd %i. "
- "Closing fd and returning error.",
- fd);
- close (fd);
- return (-1);
- }
-
- assert ((0 > status) || (nleft >= (size_t)status));
-
- nleft = nleft - status;
- ptr = ptr + status;
- }
-
- return (0);
-}
-
-
-ssize_t swrite (int fd, const void *buf, size_t count)
-{
- const char *ptr;
- size_t nleft;
- ssize_t status;
-
- ptr = (const char *) buf;
- nleft = count;
-
- while (nleft > 0)
- {
- status = write (fd, (const void *) ptr, nleft);
-
- if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
- continue;
-
- if (status < 0)
- return (status);
-
- nleft = nleft - status;
- ptr = ptr + status;
- }
-
- return (0);
-}
-
-int strsplit (char *string, char **fields, size_t size)
-{
- size_t i;
- char *ptr;
- char *saveptr;
-
- i = 0;
- ptr = string;
- saveptr = NULL;
- while ((fields[i] = strtok_r (ptr, " \t\r\n", &saveptr)) != NULL)
- {
- ptr = NULL;
- i++;
-
- if (i >= size)
- break;
- }
-
- return ((int) i);
-}
-
-int strjoin (char *dst, size_t dst_len,
- char **fields, size_t fields_num,
- const char *sep)
-{
- size_t field_len;
- size_t sep_len;
- int i;
-
- memset (dst, '\0', dst_len);
-
- if (fields_num <= 0)
- return (-1);
-
- sep_len = 0;
- if (sep != NULL)
- sep_len = strlen (sep);
-
- for (i = 0; i < (int)fields_num; i++)
- {
- if ((i > 0) && (sep_len > 0))
- {
- if (dst_len <= sep_len)
- return (-1);
-
- strncat (dst, sep, dst_len);
- dst_len -= sep_len;
- }
-
- field_len = strlen (fields[i]);
-
- if (dst_len <= field_len)
- return (-1);
-
- strncat (dst, fields[i], dst_len);
- dst_len -= field_len;
- }
-
- return (strlen (dst));
-}
-
-int strsubstitute (char *str, char c_from, char c_to)
-{
- int ret;
-
- if (str == NULL)
- return (-1);
-
- ret = 0;
- while (*str != '\0')
- {
- if (*str == c_from)
- {
- *str = c_to;
- ret++;
- }
- str++;
- }
-
- return (ret);
-} /* int strsubstitute */
-
-int strunescape (char *buf, size_t buf_len)
-{
- size_t i;
-
- for (i = 0; (i < buf_len) && (buf[i] != '\0'); ++i)
- {
- if (buf[i] != '\\')
- continue;
-
- if (((i + 1) >= buf_len) || (buf[i + 1] == 0)) {
- ERROR ("string unescape: backslash found at end of string.");
- /* Ensure null-byte at the end of the buffer. */
- buf[i] = 0;
- return (-1);
- }
-
- switch (buf[i + 1]) {
- case 't':
- buf[i] = '\t';
- break;
- case 'n':
- buf[i] = '\n';
- break;
- case 'r':
- buf[i] = '\r';
- break;
- default:
- buf[i] = buf[i + 1];
- break;
- }
-
- /* Move everything after the position one position to the left.
- * Add a null-byte as last character in the buffer. */
- memmove (buf + i + 1, buf + i + 2, buf_len - i - 2);
- buf[buf_len - 1] = 0;
- }
- return (0);
-} /* int strunescape */
-
-size_t strstripnewline (char *buffer)
-{
- size_t buffer_len = strlen (buffer);
-
- while (buffer_len > 0)
- {
- if ((buffer[buffer_len - 1] != '\n')
- && (buffer[buffer_len - 1] != '\r'))
- break;
- buffer[buffer_len] = 0;
- buffer_len--;
- }
-
- return (buffer_len);
-} /* size_t strstripnewline */
-
-int escape_slashes (char *buffer, size_t buffer_size)
-{
- int i;
- size_t buffer_len;
-
- buffer_len = strlen (buffer);
-
- if (buffer_len <= 1)
- {
- if (strcmp ("/", buffer) == 0)
- {
- if (buffer_size < 5)
- return (-1);
- sstrncpy (buffer, "root", buffer_size);
- }
- return (0);
- }
-
- /* Move one to the left */
- if (buffer[0] == '/')
- {
- memmove (buffer, buffer + 1, buffer_len);
- buffer_len--;
- }
-
- for (i = 0; i < buffer_len - 1; i++)
- {
- if (buffer[i] == '/')
- buffer[i] = '_';
- }
-
- return (0);
-} /* int escape_slashes */
-
-void replace_special (char *buffer, size_t buffer_size)
-{
- size_t i;
-
- for (i = 0; i < buffer_size; i++)
- {
- if (buffer[i] == 0)
- return;
- if ((!isalnum ((int) buffer[i])) && (buffer[i] != '-'))
- buffer[i] = '_';
- }
-} /* void replace_special */
-
-int timeval_cmp (struct timeval tv0, struct timeval tv1, struct timeval *delta)
-{
- struct timeval *larger;
- struct timeval *smaller;
-
- int status;
-
- NORMALIZE_TIMEVAL (tv0);
- NORMALIZE_TIMEVAL (tv1);
-
- if ((tv0.tv_sec == tv1.tv_sec) && (tv0.tv_usec == tv1.tv_usec))
- {
- if (delta != NULL) {
- delta->tv_sec = 0;
- delta->tv_usec = 0;
- }
- return (0);
- }
-
- if ((tv0.tv_sec < tv1.tv_sec)
- || ((tv0.tv_sec == tv1.tv_sec) && (tv0.tv_usec < tv1.tv_usec)))
- {
- larger = &tv1;
- smaller = &tv0;
- status = -1;
- }
- else
- {
- larger = &tv0;
- smaller = &tv1;
- status = 1;
- }
-
- if (delta != NULL) {
- delta->tv_sec = larger->tv_sec - smaller->tv_sec;
-
- if (smaller->tv_usec <= larger->tv_usec)
- delta->tv_usec = larger->tv_usec - smaller->tv_usec;
- else
- {
- --delta->tv_sec;
- delta->tv_usec = 1000000 + larger->tv_usec - smaller->tv_usec;
- }
- }
-
- assert ((delta == NULL)
- || ((0 <= delta->tv_usec) && (delta->tv_usec < 1000000)));
-
- return (status);
-} /* int timeval_cmp */
-
-int check_create_dir (const char *file_orig)
-{
- struct stat statbuf;
-
- char file_copy[512];
- char dir[512];
- int dir_len = 512;
- char *fields[16];
- int fields_num;
- char *ptr;
- char *saveptr;
- int last_is_file = 1;
- int path_is_absolute = 0;
- size_t len;
- int i;
-
- /*
- * Sanity checks first
- */
- if (file_orig == NULL)
- return (-1);
-
- if ((len = strlen (file_orig)) < 1)
- return (-1);
- else if (len >= sizeof (file_copy))
- return (-1);
-
- /*
- * If `file_orig' ends in a slash the last component is a directory,
- * otherwise it's a file. Act accordingly..
- */
- if (file_orig[len - 1] == '/')
- last_is_file = 0;
- if (file_orig[0] == '/')
- path_is_absolute = 1;
-
- /*
- * Create a copy for `strtok_r' to destroy
- */
- sstrncpy (file_copy, file_orig, sizeof (file_copy));
-
- /*
- * Break into components. This will eat up several slashes in a row and
- * remove leading and trailing slashes..
- */
- ptr = file_copy;
- saveptr = NULL;
- fields_num = 0;
- while ((fields[fields_num] = strtok_r (ptr, "/", &saveptr)) != NULL)
- {
- ptr = NULL;
- fields_num++;
-
- if (fields_num >= 16)
- break;
- }
-
- /*
- * For each component, do..
- */
- for (i = 0; i < (fields_num - last_is_file); i++)
- {
- /*
- * Do not create directories that start with a dot. This
- * prevents `../../' attacks and other likely malicious
- * behavior.
- */
- if (fields[i][0] == '.')
- {
- ERROR ("Cowardly refusing to create a directory that "
- "begins with a `.' (dot): `%s'", file_orig);
- return (-2);
- }
-
- /*
- * Join the components together again
- */
- dir[0] = '/';
- if (strjoin (dir + path_is_absolute, dir_len - path_is_absolute,
- fields, i + 1, "/") < 0)
- {
- ERROR ("strjoin failed: `%s', component #%i", file_orig, i);
- return (-1);
- }
-
- while (42) {
- if ((stat (dir, &statbuf) == -1)
- && (lstat (dir, &statbuf) == -1))
- {
- if (errno == ENOENT)
- {
- if (mkdir (dir, S_IRWXU | S_IRWXG | S_IRWXO) == 0)
- break;
-
- /* this might happen, if a different thread created
- * the directory in the meantime
- * => call stat() again to check for S_ISDIR() */
- if (EEXIST == errno)
- continue;
-
- char errbuf[1024];
- ERROR ("check_create_dir: mkdir (%s): %s", dir,
- sstrerror (errno,
- errbuf, sizeof (errbuf)));
- return (-1);
- }
- else
- {
- char errbuf[1024];
- ERROR ("check_create_dir: stat (%s): %s", dir,
- sstrerror (errno, errbuf,
- sizeof (errbuf)));
- return (-1);
- }
- }
- else if (!S_ISDIR (statbuf.st_mode))
- {
- ERROR ("check_create_dir: `%s' exists but is not "
- "a directory!", dir);
- return (-1);
- }
- break;
- }
- }
-
- return (0);
-} /* check_create_dir */
-
-#ifdef HAVE_LIBKSTAT
-int get_kstat (kstat_t **ksp_ptr, char *module, int instance, char *name)
-{
- char ident[128];
-
- *ksp_ptr = NULL;
-
- if (kc == NULL)
- return (-1);
-
- ssnprintf (ident, sizeof (ident), "%s,%i,%s", module, instance, name);
-
- *ksp_ptr = kstat_lookup (kc, module, instance, name);
- if (*ksp_ptr == NULL)
- {
- ERROR ("get_kstat: Cound not find kstat %s", ident);
- return (-1);
- }
-
- if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED)
- {
- ERROR ("get_kstat: kstat %s has wrong type", ident);
- *ksp_ptr = NULL;
- return (-1);
- }
-
-#ifdef assert
- assert (*ksp_ptr != NULL);
- assert ((*ksp_ptr)->ks_type == KSTAT_TYPE_NAMED);
-#endif
-
- if (kstat_read (kc, *ksp_ptr, NULL) == -1)
- {
- ERROR ("get_kstat: kstat %s could not be read", ident);
- return (-1);
- }
-
- if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED)
- {
- ERROR ("get_kstat: kstat %s has wrong type", ident);
- return (-1);
- }
-
- return (0);
-}
-
-long long get_kstat_value (kstat_t *ksp, char *name)
-{
- kstat_named_t *kn;
- long long retval = -1LL;
-
- if (ksp == NULL)
- {
- ERROR ("get_kstat_value (\"%s\"): ksp is NULL.", name);
- return (-1LL);
- }
- else if (ksp->ks_type != KSTAT_TYPE_NAMED)
- {
- ERROR ("get_kstat_value (\"%s\"): ksp->ks_type (%#x) "
- "is not KSTAT_TYPE_NAMED (%#x).",
- name,
- (unsigned int) ksp->ks_type,
- (unsigned int) KSTAT_TYPE_NAMED);
- return (-1LL);
- }
-
- if ((kn = (kstat_named_t *) kstat_data_lookup (ksp, name)) == NULL)
- return (-1LL);
-
- if (kn->data_type == KSTAT_DATA_INT32)
- retval = (long long) kn->value.i32;
- else if (kn->data_type == KSTAT_DATA_UINT32)
- retval = (long long) kn->value.ui32;
- else if (kn->data_type == KSTAT_DATA_INT64)
- retval = (long long) kn->value.i64; /* According to ANSI C99 `long long' must hold at least 64 bits */
- else if (kn->data_type == KSTAT_DATA_UINT64)
- retval = (long long) kn->value.ui64; /* XXX: Might overflow! */
- else
- WARNING ("get_kstat_value: Not a numeric value: %s", name);
-
- return (retval);
-}
-#endif /* HAVE_LIBKSTAT */
-
-#ifndef HAVE_HTONLL
-unsigned long long ntohll (unsigned long long n)
-{
-#if BYTE_ORDER == BIG_ENDIAN
- return (n);
-#else
- return (((unsigned long long) ntohl (n)) << 32) + ntohl (n >> 32);
-#endif
-} /* unsigned long long ntohll */
-
-unsigned long long htonll (unsigned long long n)
-{
-#if BYTE_ORDER == BIG_ENDIAN
- return (n);
-#else
- return (((unsigned long long) htonl (n)) << 32) + htonl (n >> 32);
-#endif
-} /* unsigned long long htonll */
-#endif /* HAVE_HTONLL */
-
-#if FP_LAYOUT_NEED_NOTHING
-/* Well, we need nothing.. */
-/* #endif FP_LAYOUT_NEED_NOTHING */
-
-#elif FP_LAYOUT_NEED_ENDIANFLIP || FP_LAYOUT_NEED_INTSWAP
-# if FP_LAYOUT_NEED_ENDIANFLIP
-# define FP_CONVERT(A) ((((uint64_t)(A) & 0xff00000000000000LL) >> 56) | \
- (((uint64_t)(A) & 0x00ff000000000000LL) >> 40) | \
- (((uint64_t)(A) & 0x0000ff0000000000LL) >> 24) | \
- (((uint64_t)(A) & 0x000000ff00000000LL) >> 8) | \
- (((uint64_t)(A) & 0x00000000ff000000LL) << 8) | \
- (((uint64_t)(A) & 0x0000000000ff0000LL) << 24) | \
- (((uint64_t)(A) & 0x000000000000ff00LL) << 40) | \
- (((uint64_t)(A) & 0x00000000000000ffLL) << 56))
-# else
-# define FP_CONVERT(A) ((((uint64_t)(A) & 0xffffffff00000000LL) >> 32) | \
- (((uint64_t)(A) & 0x00000000ffffffffLL) << 32))
-# endif
-
-double ntohd (double d)
-{
- union
- {
- uint8_t byte[8];
- uint64_t integer;
- double floating;
- } ret;
-
- ret.floating = d;
-
- /* NAN in x86 byte order */
- if ((ret.byte[0] == 0x00) && (ret.byte[1] == 0x00)
- && (ret.byte[2] == 0x00) && (ret.byte[3] == 0x00)
- && (ret.byte[4] == 0x00) && (ret.byte[5] == 0x00)
- && (ret.byte[6] == 0xf8) && (ret.byte[7] == 0x7f))
- {
- return (NAN);
- }
- else
- {
- uint64_t tmp;
-
- tmp = ret.integer;
- ret.integer = FP_CONVERT (tmp);
- return (ret.floating);
- }
-} /* double ntohd */
-
-double htond (double d)
-{
- union
- {
- uint8_t byte[8];
- uint64_t integer;
- double floating;
- } ret;
-
- if (isnan (d))
- {
- ret.byte[0] = ret.byte[1] = ret.byte[2] = ret.byte[3] = 0x00;
- ret.byte[4] = ret.byte[5] = 0x00;
- ret.byte[6] = 0xf8;
- ret.byte[7] = 0x7f;
- return (ret.floating);
- }
- else
- {
- uint64_t tmp;
-
- ret.floating = d;
- tmp = FP_CONVERT (ret.integer);
- ret.integer = tmp;
- return (ret.floating);
- }
-} /* double htond */
-#endif /* FP_LAYOUT_NEED_ENDIANFLIP || FP_LAYOUT_NEED_INTSWAP */
-
-int format_name (char *ret, int ret_len,
- const char *hostname,
- const char *plugin, const char *plugin_instance,
- const char *type, const char *type_instance)
-{
- char *buffer;
- size_t buffer_size;
-
- buffer = ret;
- buffer_size = (size_t) ret_len;
-
-#define APPEND(str) do { \
- size_t l = strlen (str); \
- if (l >= buffer_size) \
- return (ENOBUFS); \
- memcpy (buffer, (str), l); \
- buffer += l; buffer_size -= l; \
-} while (0)
-
- assert (plugin != NULL);
- assert (type != NULL);
-
- APPEND (hostname);
- APPEND ("/");
- APPEND (plugin);
- if ((plugin_instance != NULL) && (plugin_instance[0] != 0))
- {
- APPEND ("-");
- APPEND (plugin_instance);
- }
- APPEND ("/");
- APPEND (type);
- if ((type_instance != NULL) && (type_instance[0] != 0))
- {
- APPEND ("-");
- APPEND (type_instance);
- }
- assert (buffer_size > 0);
- buffer[0] = 0;
-
-#undef APPEND
- return (0);
-} /* int format_name */
-
-int format_values (char *ret, size_t ret_len, /* {{{ */
- const data_set_t *ds, const value_list_t *vl,
- _Bool store_rates)
-{
- size_t offset = 0;
- int status;
- int i;
- gauge_t *rates = NULL;
-
- assert (0 == strcmp (ds->type, vl->type));
-
- memset (ret, 0, ret_len);
-
-#define BUFFER_ADD(...) do { \
- status = ssnprintf (ret + offset, ret_len - offset, \
- __VA_ARGS__); \
- if (status < 1) \
- { \
- sfree (rates); \
- return (-1); \
- } \
- else if (((size_t) status) >= (ret_len - offset)) \
- { \
- sfree (rates); \
- return (-1); \
- } \
- else \
- offset += ((size_t) status); \
-} while (0)
-
- BUFFER_ADD ("%.3f", CDTIME_T_TO_DOUBLE (vl->time));
-
- for (i = 0; i < ds->ds_num; i++)
- {
- if (ds->ds[i].type == DS_TYPE_GAUGE)
- BUFFER_ADD (":%f", vl->values[i].gauge);
- else if (store_rates)
- {
- if (rates == NULL)
- rates = uc_get_rate (ds, vl);
- if (rates == NULL)
- {
- WARNING ("format_values: "
- "uc_get_rate failed.");
- return (-1);
- }
- BUFFER_ADD (":%g", rates[i]);
- }
- else if (ds->ds[i].type == DS_TYPE_COUNTER)
- BUFFER_ADD (":%llu", vl->values[i].counter);
- else if (ds->ds[i].type == DS_TYPE_DERIVE)
- BUFFER_ADD (":%"PRIi64, vl->values[i].derive);
- else if (ds->ds[i].type == DS_TYPE_ABSOLUTE)
- BUFFER_ADD (":%"PRIu64, vl->values[i].absolute);
- else
- {
- ERROR ("format_values plugin: Unknown data source type: %i",
- ds->ds[i].type);
- sfree (rates);
- return (-1);
- }
- } /* for ds->ds_num */
-
-#undef BUFFER_ADD
-
- sfree (rates);
- return (0);
-} /* }}} int format_values */
-
-int parse_identifier (char *str, char **ret_host,
- char **ret_plugin, char **ret_plugin_instance,
- char **ret_type, char **ret_type_instance)
-{
- char *hostname = NULL;
- char *plugin = NULL;
- char *plugin_instance = NULL;
- char *type = NULL;
- char *type_instance = NULL;
-
- hostname = str;
- if (hostname == NULL)
- return (-1);
-
- plugin = strchr (hostname, '/');
- if (plugin == NULL)
- return (-1);
- *plugin = '\0'; plugin++;
-
- type = strchr (plugin, '/');
- if (type == NULL)
- return (-1);
- *type = '\0'; type++;
-
- plugin_instance = strchr (plugin, '-');
- if (plugin_instance != NULL)
- {
- *plugin_instance = '\0';
- plugin_instance++;
- }
-
- type_instance = strchr (type, '-');
- if (type_instance != NULL)
- {
- *type_instance = '\0';
- type_instance++;
- }
-
- *ret_host = hostname;
- *ret_plugin = plugin;
- *ret_plugin_instance = plugin_instance;
- *ret_type = type;
- *ret_type_instance = type_instance;
- return (0);
-} /* int parse_identifier */
-
-int parse_identifier_vl (const char *str, value_list_t *vl) /* {{{ */
-{
- char str_copy[6 * DATA_MAX_NAME_LEN];
- char *host = NULL;
- char *plugin = NULL;
- char *plugin_instance = NULL;
- char *type = NULL;
- char *type_instance = NULL;
- int status;
-
- if ((str == NULL) || (vl == NULL))
- return (EINVAL);
-
- sstrncpy (str_copy, str, sizeof (str_copy));
-
- status = parse_identifier (str_copy, &host,
- &plugin, &plugin_instance,
- &type, &type_instance);
- if (status != 0)
- return (status);
-
- sstrncpy (vl->host, host, sizeof (vl->host));
- sstrncpy (vl->plugin, plugin, sizeof (vl->plugin));
- sstrncpy (vl->plugin_instance,
- (plugin_instance != NULL) ? plugin_instance : "",
- sizeof (vl->plugin_instance));
- sstrncpy (vl->type, type, sizeof (vl->type));
- sstrncpy (vl->type_instance,
- (type_instance != NULL) ? type_instance : "",
- sizeof (vl->type_instance));
-
- return (0);
-} /* }}} int parse_identifier_vl */
-
-int parse_value (const char *value_orig, value_t *ret_value, int ds_type)
-{
- char *value;
- char *endptr = NULL;
- size_t value_len;
-
- if (value_orig == NULL)
- return (EINVAL);
-
- value = strdup (value_orig);
- if (value == NULL)
- return (ENOMEM);
- value_len = strlen (value);
-
- while ((value_len > 0) && isspace ((int) value[value_len - 1]))
- {
- value[value_len - 1] = 0;
- value_len--;
- }
-
- switch (ds_type)
- {
- case DS_TYPE_COUNTER:
- ret_value->counter = (counter_t) strtoull (value, &endptr, 0);
- break;
-
- case DS_TYPE_GAUGE:
- ret_value->gauge = (gauge_t) strtod (value, &endptr);
- break;
-
- case DS_TYPE_DERIVE:
- ret_value->derive = (derive_t) strtoll (value, &endptr, 0);
- break;
-
- case DS_TYPE_ABSOLUTE:
- ret_value->absolute = (absolute_t) strtoull (value, &endptr, 0);
- break;
-
- default:
- sfree (value);
- ERROR ("parse_value: Invalid data source type: %i.", ds_type);
- return -1;
- }
-
- if (value == endptr) {
- ERROR ("parse_value: Failed to parse string as %s: %s.",
- DS_TYPE_TO_STRING (ds_type), value);
- sfree (value);
- return -1;
- }
- else if ((NULL != endptr) && ('\0' != *endptr))
- INFO ("parse_value: Ignoring trailing garbage \"%s\" after %s value. "
- "Input string was \"%s\".",
- endptr, DS_TYPE_TO_STRING (ds_type), value_orig);
-
- sfree (value);
- return 0;
-} /* int parse_value */
-
-int parse_values (char *buffer, value_list_t *vl, const data_set_t *ds)
-{
- int i;
- char *dummy;
- char *ptr;
- char *saveptr;
-
- i = -1;
- dummy = buffer;
- saveptr = NULL;
- while ((ptr = strtok_r (dummy, ":", &saveptr)) != NULL)
- {
- dummy = NULL;
-
- if (i >= vl->values_len)
- {
- /* Make sure i is invalid. */
- i = vl->values_len + 1;
- break;
- }
-
- if (i == -1)
- {
- if (strcmp ("N", ptr) == 0)
- vl->time = cdtime ();
- else
- {
- char *endptr = NULL;
- double tmp;
-
- errno = 0;
- tmp = strtod (ptr, &endptr);
- if ((errno != 0) /* Overflow */
- || (endptr == ptr) /* Invalid string */
- || (endptr == NULL) /* This should not happen */
- || (*endptr != 0)) /* Trailing chars */
- return (-1);
-
- vl->time = DOUBLE_TO_CDTIME_T (tmp);
- }
- }
- else
- {
- if ((strcmp ("U", ptr) == 0) && (ds->ds[i].type == DS_TYPE_GAUGE))
- vl->values[i].gauge = NAN;
- else if (0 != parse_value (ptr, &vl->values[i], ds->ds[i].type))
- return -1;
- }
-
- i++;
- } /* while (strtok_r) */
-
- if ((ptr != NULL) || (i != vl->values_len))
- return (-1);
- return (0);
-} /* int parse_values */
-
-#if !HAVE_GETPWNAM_R
-int getpwnam_r (const char *name, struct passwd *pwbuf, char *buf,
- size_t buflen, struct passwd **pwbufp)
-{
- int status = 0;
- struct passwd *pw;
-
- memset (pwbuf, '\0', sizeof (struct passwd));
-
- pthread_mutex_lock (&getpwnam_r_lock);
-
- do
- {
- pw = getpwnam (name);
- if (pw == NULL)
- {
- status = (errno != 0) ? errno : ENOENT;
- break;
- }
-
-#define GETPWNAM_COPY_MEMBER(member) \
- if (pw->member != NULL) \
- { \
- int len = strlen (pw->member); \
- if (len >= buflen) \
- { \
- status = ENOMEM; \
- break; \
- } \
- sstrncpy (buf, pw->member, buflen); \
- pwbuf->member = buf; \
- buf += (len + 1); \
- buflen -= (len + 1); \
- }
- GETPWNAM_COPY_MEMBER(pw_name);
- GETPWNAM_COPY_MEMBER(pw_passwd);
- GETPWNAM_COPY_MEMBER(pw_gecos);
- GETPWNAM_COPY_MEMBER(pw_dir);
- GETPWNAM_COPY_MEMBER(pw_shell);
-
- pwbuf->pw_uid = pw->pw_uid;
- pwbuf->pw_gid = pw->pw_gid;
-
- if (pwbufp != NULL)
- *pwbufp = pwbuf;
- } while (0);
-
- pthread_mutex_unlock (&getpwnam_r_lock);
-
- return (status);
-} /* int getpwnam_r */
-#endif /* !HAVE_GETPWNAM_R */
-
-int notification_init (notification_t *n, int severity, const char *message,
- const char *host,
- const char *plugin, const char *plugin_instance,
- const char *type, const char *type_instance)
-{
- memset (n, '\0', sizeof (notification_t));
-
- n->severity = severity;
-
- if (message != NULL)
- sstrncpy (n->message, message, sizeof (n->message));
- if (host != NULL)
- sstrncpy (n->host, host, sizeof (n->host));
- if (plugin != NULL)
- sstrncpy (n->plugin, plugin, sizeof (n->plugin));
- if (plugin_instance != NULL)
- sstrncpy (n->plugin_instance, plugin_instance,
- sizeof (n->plugin_instance));
- if (type != NULL)
- sstrncpy (n->type, type, sizeof (n->type));
- if (type_instance != NULL)
- sstrncpy (n->type_instance, type_instance,
- sizeof (n->type_instance));
-
- return (0);
-} /* int notification_init */
-
-int walk_directory (const char *dir, dirwalk_callback_f callback,
- void *user_data, int include_hidden)
-{
- struct dirent *ent;
- DIR *dh;
- int success;
- int failure;
-
- success = 0;
- failure = 0;
-
- if ((dh = opendir (dir)) == NULL)
- {
- char errbuf[1024];
- ERROR ("walk_directory: Cannot open '%s': %s", dir,
- sstrerror (errno, errbuf, sizeof (errbuf)));
- return -1;
- }
-
- while ((ent = readdir (dh)) != NULL)
- {
- int status;
-
- if (include_hidden)
- {
- if ((strcmp (".", ent->d_name) == 0)
- || (strcmp ("..", ent->d_name) == 0))
- continue;
- }
- else /* if (!include_hidden) */
- {
- if (ent->d_name[0]=='.')
- continue;
- }
-
- status = (*callback) (dir, ent->d_name, user_data);
- if (status != 0)
- failure++;
- else
- success++;
- }
-
- closedir (dh);
-
- if ((success == 0) && (failure > 0))
- return (-1);
- return (0);
-}
-
-ssize_t read_file_contents (const char *filename, char *buf, size_t bufsize)
-{
- FILE *fh;
- ssize_t ret;
-
- fh = fopen (filename, "r");
- if (fh == NULL)
- return (-1);
-
- ret = (ssize_t) fread (buf, 1, bufsize, fh);
- if ((ret == 0) && (ferror (fh) != 0))
- {
- ERROR ("read_file_contents: Reading file \"%s\" failed.",
- filename);
- ret = -1;
- }
-
- fclose(fh);
- return (ret);
-}
-
-counter_t counter_diff (counter_t old_value, counter_t new_value)
-{
- counter_t diff;
-
- if (old_value > new_value)
- {
- if (old_value <= 4294967295U)
- diff = (4294967295U - old_value) + new_value;
- else
- diff = (18446744073709551615ULL - old_value)
- + new_value;
- }
- else
- {
- diff = new_value - old_value;
- }
-
- return (diff);
-} /* counter_t counter_diff */
-
-int rate_to_value (value_t *ret_value, gauge_t rate, /* {{{ */
- rate_to_value_state_t *state,
- int ds_type, cdtime_t t)
-{
- gauge_t delta_gauge;
- cdtime_t delta_t;
-
- if (ds_type == DS_TYPE_GAUGE)
- {
- state->last_value.gauge = rate;
- state->last_time = t;
-
- *ret_value = state->last_value;
- return (0);
- }
-
- /* Counter and absolute can't handle negative rates. Reset "last time"
- * to zero, so that the next valid rate will re-initialize the
- * structure. */
- if ((rate < 0.0)
- && ((ds_type == DS_TYPE_COUNTER)
- || (ds_type == DS_TYPE_ABSOLUTE)))
- {
- memset (state, 0, sizeof (*state));
- return (EINVAL);
- }
-
- /* Another invalid state: The time is not increasing. */
- if (t <= state->last_time)
- {
- memset (state, 0, sizeof (*state));
- return (EINVAL);
- }
-
- delta_t = t - state->last_time;
- delta_gauge = (rate * CDTIME_T_TO_DOUBLE (delta_t)) + state->residual;
-
- /* Previous value is invalid. */
- if (state->last_time == 0) /* {{{ */
- {
- if (ds_type == DS_TYPE_DERIVE)
- {
- state->last_value.derive = (derive_t) rate;
- state->residual = rate - ((gauge_t) state->last_value.derive);
- }
- else if (ds_type == DS_TYPE_COUNTER)
- {
- state->last_value.counter = (counter_t) rate;
- state->residual = rate - ((gauge_t) state->last_value.counter);
- }
- else if (ds_type == DS_TYPE_ABSOLUTE)
- {
- state->last_value.absolute = (absolute_t) rate;
- state->residual = rate - ((gauge_t) state->last_value.absolute);
- }
- else
- {
- assert (23 == 42);
- }
-
- state->last_time = t;
- return (EAGAIN);
- } /* }}} */
-
- if (ds_type == DS_TYPE_DERIVE)
- {
- derive_t delta_derive = (derive_t) delta_gauge;
-
- state->last_value.derive += delta_derive;
- state->residual = delta_gauge - ((gauge_t) delta_derive);
- }
- else if (ds_type == DS_TYPE_COUNTER)
- {
- counter_t delta_counter = (counter_t) delta_gauge;
-
- state->last_value.counter += delta_counter;
- state->residual = delta_gauge - ((gauge_t) delta_counter);
- }
- else if (ds_type == DS_TYPE_ABSOLUTE)
- {
- absolute_t delta_absolute = (absolute_t) delta_gauge;
-
- state->last_value.absolute = delta_absolute;
- state->residual = delta_gauge - ((gauge_t) delta_absolute);
- }
- else
- {
- assert (23 == 42);
- }
-
- state->last_time = t;
- *ret_value = state->last_value;
- return (0);
-} /* }}} value_t rate_to_value */
-
-int value_to_rate (value_t *ret_rate, derive_t value, /* {{{ */
- value_to_rate_state_t *state,
- int ds_type, cdtime_t t)
-{
- double interval;
-
- /* Another invalid state: The time is not increasing. */
- if (t <= state->last_time)
- {
- memset (state, 0, sizeof (*state));
- return (EINVAL);
- }
-
- interval = CDTIME_T_TO_DOUBLE(t - state->last_time);
-
- /* Previous value is invalid. */
- if (state->last_time == 0) /* {{{ */
- {
- if (ds_type == DS_TYPE_DERIVE)
- {
- state->last_value.derive = value;
- }
- else if (ds_type == DS_TYPE_COUNTER)
- {
- state->last_value.counter = (counter_t) value;
- }
- else if (ds_type == DS_TYPE_ABSOLUTE)
- {
- state->last_value.absolute = (absolute_t) value;
- }
- else
- {
- assert (23 == 42);
- }
-
- state->last_time = t;
- return (EAGAIN);
- } /* }}} */
-
- if (ds_type == DS_TYPE_DERIVE)
- {
- ret_rate->gauge = (value - state->last_value.derive) / interval;
- state->last_value.derive = value;
- }
- else if (ds_type == DS_TYPE_COUNTER)
- {
- ret_rate->gauge = (((counter_t)value) - state->last_value.counter) / interval;
- state->last_value.counter = (counter_t) value;
- }
- else if (ds_type == DS_TYPE_ABSOLUTE)
- {
- ret_rate->gauge = (((absolute_t)value) - state->last_value.absolute) / interval;
- state->last_value.absolute = (absolute_t) value;
- }
- else
- {
- assert (23 == 42);
- }
-
- state->last_time = t;
- return (0);
-} /* }}} value_t rate_to_value */
-
-int service_name_to_port_number (const char *service_name)
-{
- struct addrinfo *ai_list;
- struct addrinfo *ai_ptr;
- struct addrinfo ai_hints;
- int status;
- int service_number;
-
- if (service_name == NULL)
- return (-1);
-
- ai_list = NULL;
- memset (&ai_hints, 0, sizeof (ai_hints));
- ai_hints.ai_family = AF_UNSPEC;
-
- status = getaddrinfo (/* node = */ NULL, service_name,
- &ai_hints, &ai_list);
- if (status != 0)
- {
- ERROR ("service_name_to_port_number: getaddrinfo failed: %s",
- gai_strerror (status));
- return (-1);
- }
-
- service_number = -1;
- for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
- {
- if (ai_ptr->ai_family == AF_INET)
- {
- struct sockaddr_in *sa;
-
- sa = (void *) ai_ptr->ai_addr;
- service_number = (int) ntohs (sa->sin_port);
- }
- else if (ai_ptr->ai_family == AF_INET6)
- {
- struct sockaddr_in6 *sa;
-
- sa = (void *) ai_ptr->ai_addr;
- service_number = (int) ntohs (sa->sin6_port);
- }
-
- if ((service_number > 0) && (service_number <= 65535))
- break;
- }
-
- freeaddrinfo (ai_list);
-
- if ((service_number > 0) && (service_number <= 65535))
- return (service_number);
- return (-1);
-} /* int service_name_to_port_number */
-
-int strtoderive (const char *string, derive_t *ret_value) /* {{{ */
-{
- derive_t tmp;
- char *endptr;
-
- if ((string == NULL) || (ret_value == NULL))
- return (EINVAL);
-
- errno = 0;
- endptr = NULL;
- tmp = (derive_t) strtoll (string, &endptr, /* base = */ 0);
- if ((endptr == string) || (errno != 0))
- return (-1);
-
- *ret_value = tmp;
- return (0);
-} /* }}} int strtoderive */
-
-int strtogauge (const char *string, gauge_t *ret_value) /* {{{ */
-{
- gauge_t tmp;
- char *endptr = NULL;
-
- if ((string == NULL) || (ret_value == NULL))
- return (EINVAL);
-
- errno = 0;
- endptr = NULL;
- tmp = (gauge_t) strtod (string, &endptr);
- if (errno != 0)
- return (errno);
- else if ((endptr == NULL) || (*endptr != 0))
- return (EINVAL);
-
- *ret_value = tmp;
- return (0);
-} /* }}} int strtogauge */
-
-int strarray_add (char ***ret_array, size_t *ret_array_len, char const *str) /* {{{ */
-{
- char **array;
- size_t array_len = *ret_array_len;
-
- if (str == NULL)
- return (EINVAL);
-
- array = realloc (*ret_array,
- (array_len + 1) * sizeof (*array));
- if (array == NULL)
- return (ENOMEM);
- *ret_array = array;
-
- array[array_len] = strdup (str);
- if (array[array_len] == NULL)
- return (ENOMEM);
-
- array_len++;
- *ret_array_len = array_len;
- return (0);
-} /* }}} int strarray_add */
-
-void strarray_free (char **array, size_t array_len) /* {{{ */
-{
- size_t i;
-
- for (i = 0; i < array_len; i++)
- sfree (array[i]);
- sfree (array);
-} /* }}} void strarray_free */
projects / collectd.git / blobdiff