+++ /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>
-**/
-
-#include "collectd.h"
-
-#include "common.h"
-#include "plugin.h"
-#include "utils_cache.h"
-
-/* for getaddrinfo */
-#include <netdb.h>
-#include <sys/types.h>
-
-#include <poll.h>
-
-#if HAVE_NETINET_IN_H
-#include <netinet/in.h>
-#endif
-
-#if HAVE_NETINET_TCP_H
-#include <netinet/tcp.h>
-#endif
-
-/* for ntohl and htonl */
-#if HAVE_ARPA_INET_H
-#include <arpa/inet.h>
-#endif
-
-#if HAVE_CAPABILITY
-#include <sys/capability.h>
-#endif
-
-#if HAVE_KSTAT_H
-#include <kstat.h>
-#endif
-
-#ifdef HAVE_LIBKSTAT
-extern kstat_ctl_t *kc;
-#endif
-
-#if !defined(MSG_DONTWAIT)
-#if defined(MSG_NONBLOCK)
-/* AIX doesn't have MSG_DONTWAIT */
-#define MSG_DONTWAIT MSG_NONBLOCK
-#else
-/* Windows doesn't have MSG_DONTWAIT or MSG_NONBLOCK */
-#define MSG_DONTWAIT 0
-#endif /* defined(MSG_NONBLOCK) */
-#endif /* !defined(MSG_DONTWAIT) */
-
-#if !HAVE_GETPWNAM_R && defined(HAVE_GETPWNAM)
-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 */
-
-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 = calloc(1, alloc_buffer_size);
- if (alloc_buffer == NULL)
- return NULL;
-
- /* 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 = malloc(sz);
- if (r == NULL) {
- ERROR("sstrdup: Out of memory.");
- exit(3);
- }
- memcpy(r, s, 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) {
- snprintf(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
-
-int 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. ", fd);
- return -1;
- }
-
- assert((0 > status) || (nleft >= (size_t)status));
-
- nleft = nleft - ((size_t)status);
- ptr = ptr + ((size_t)status);
- }
-
- return 0;
-}
-
-int swrite(int fd, const void *buf, size_t count) {
- const char *ptr;
- size_t nleft;
- ssize_t status;
- struct pollfd pfd;
-
- ptr = (const char *)buf;
- nleft = count;
-
- if (fd < 0) {
- errno = EINVAL;
- return errno;
- }
-
- /* checking for closed peer connection */
- pfd.fd = fd;
- pfd.events = POLLIN | POLLHUP;
- pfd.revents = 0;
- if (poll(&pfd, 1, 0) > 0) {
- char buffer[32];
- if (recv(fd, buffer, sizeof(buffer), MSG_PEEK | MSG_DONTWAIT) == 0) {
- /* if recv returns zero (even though poll() said there is data to be
- * read), that means the connection has been closed */
- errno = ECONNRESET;
- return -1;
- }
- }
-
- while (nleft > 0) {
- status = write(fd, (const void *)ptr, nleft);
-
- if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
- continue;
-
- if (status < 0)
- return errno ? errno : status;
-
- nleft = nleft - ((size_t)status);
- ptr = ptr + ((size_t)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 *buffer, size_t buffer_size, char **fields, size_t fields_num,
- const char *sep) {
- size_t avail = 0;
- char *ptr = buffer;
- size_t sep_len = 0;
-
- size_t buffer_req = 0;
-
- if (((fields_num != 0) && (fields == NULL)) ||
- ((buffer_size != 0) && (buffer == NULL)))
- return -EINVAL;
-
- if (buffer != NULL)
- buffer[0] = 0;
-
- if (buffer_size != 0)
- avail = buffer_size - 1;
-
- if (sep != NULL)
- sep_len = strlen(sep);
-
- for (size_t i = 0; i < fields_num; i++) {
- size_t field_len = strlen(fields[i]);
-
- if (i != 0)
- buffer_req += sep_len;
- buffer_req += field_len;
-
- if (buffer_size == 0)
- continue;
-
- if ((i != 0) && (sep_len > 0)) {
- if (sep_len >= avail) {
- /* prevent subsequent iterations from writing to the
- * buffer. */
- avail = 0;
- continue;
- }
-
- memcpy(ptr, sep, sep_len);
-
- ptr += sep_len;
- avail -= sep_len;
- }
-
- if (field_len > avail)
- field_len = avail;
-
- memcpy(ptr, fields[i], field_len);
- ptr += field_len;
-
- avail -= field_len;
- if (ptr != NULL)
- *ptr = 0;
- }
-
- return (int)buffer_req;
-}
-
-int escape_string(char *buffer, size_t buffer_size) {
- char *temp;
- size_t j;
-
- /* Check if we need to escape at all first */
- temp = strpbrk(buffer, " \t\"\\");
- if (temp == NULL)
- return 0;
-
- if (buffer_size < 3)
- return EINVAL;
-
- temp = calloc(1, buffer_size);
- if (temp == NULL)
- return ENOMEM;
-
- temp[0] = '"';
- j = 1;
-
- for (size_t i = 0; i < buffer_size; i++) {
- if (buffer[i] == 0) {
- break;
- } else if ((buffer[i] == '"') || (buffer[i] == '\\')) {
- if (j > (buffer_size - 4))
- break;
- temp[j] = '\\';
- temp[j + 1] = buffer[i];
- j += 2;
- } else {
- if (j > (buffer_size - 3))
- break;
- temp[j] = buffer[i];
- j++;
- }
- }
-
- assert((j + 1) < buffer_size);
- temp[j] = '"';
- temp[j + 1] = 0;
-
- sstrncpy(buffer, temp, buffer_size);
- sfree(temp);
- return 0;
-} /* int escape_string */
-
-int strunescape(char *buf, size_t buf_len) {
- for (size_t i = 0; (i < buf_len) && (buf[i] != '\0'); ++i) {
- if (buf[i] != '\\')
- continue;
-
- if (((i + 1) >= buf_len) || (buf[i + 1] == 0)) {
- P_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_len--;
- buffer[buffer_len] = 0;
- }
-
- return buffer_len;
-} /* size_t strstripnewline */
-
-int escape_slashes(char *buffer, size_t buffer_size) {
- 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 (size_t i = 0; i < buffer_len; i++) {
- if (buffer[i] == '/')
- buffer[i] = '_';
- }
-
- return 0;
-} /* int escape_slashes */
-
-void replace_special(char *buffer, size_t buffer_size) {
- for (size_t 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[PATH_MAX];
- char dir[PATH_MAX];
- char *fields[16];
- int fields_num;
- char *ptr;
- char *saveptr;
- int last_is_file = 1;
- int path_is_absolute = 0;
- size_t len;
-
- /*
- * Sanity checks first
- */
- if (file_orig == NULL)
- return -1;
-
- if ((len = strlen(file_orig)) < 1)
- return -1;
- else if (len >= sizeof(file_copy)) {
- ERROR("check_create_dir: name (%s) is too long.", file_orig);
- 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 (int 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] == '.') {
- P_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,
- (size_t)(sizeof(dir) - path_is_absolute), fields,
- (size_t)(i + 1), "/") < 0) {
- P_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;
-
- P_ERROR("check_create_dir: mkdir (%s): %s", dir, STRERRNO);
- return -1;
- } else {
- P_ERROR("check_create_dir: stat (%s): %s", dir, STRERRNO);
- return -1;
- }
- } else if (!S_ISDIR(statbuf.st_mode)) {
- P_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;
-
- snprintf(ident, sizeof(ident), "%s,%i,%s", module, instance, name);
-
- *ksp_ptr = kstat_lookup(kc, module, instance, name);
- if (*ksp_ptr == NULL) {
- P_ERROR("get_kstat: Cound not find kstat %s", ident);
- return -1;
- }
-
- if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED) {
- P_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) {
- P_ERROR("get_kstat: kstat %s could not be read", ident);
- return -1;
- }
-
- if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED) {
- P_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) {
- P_ERROR("get_kstat_value (\"%s\"): ksp is NULL.", name);
- return -1LL;
- } else if (ksp->ks_type != KSTAT_TYPE_NAMED) {
- P_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
- P_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;
- gauge_t *rates = NULL;
-
- assert(0 == strcmp(ds->type, vl->type));
-
- memset(ret, 0, ret_len);
-
-#define BUFFER_ADD(...) \
- do { \
- status = snprintf(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 (size_t i = 0; i < ds->ds_num; i++) {
- if (ds->ds[i].type == DS_TYPE_GAUGE)
- BUFFER_ADD(":" GAUGE_FORMAT, 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(":" GAUGE_FORMAT, rates[i]);
- } else if (ds->ds[i].type == DS_TYPE_COUNTER)
- BUFFER_ADD(":%" PRIu64, (uint64_t)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: 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 *default_host) {
- 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) {
- if (default_host == NULL)
- return -1;
- /* else: no host specified; use default */
- type = plugin;
- plugin = hostname;
- hostname = default_host;
- } else {
- *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,
- /* default_host = */ NULL);
- 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);
- P_ERROR("parse_value: Invalid data source type: %i.", ds_type);
- return -1;
- }
-
- if (value == endptr) {
- P_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))
- P_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) {
- size_t i;
- char *dummy;
- char *ptr;
- char *saveptr;
-
- if ((buffer == NULL) || (vl == NULL) || (ds == NULL))
- return EINVAL;
-
- i = 0;
- dummy = buffer;
- saveptr = NULL;
- vl->time = 0;
- while ((ptr = strtok_r(dummy, ":", &saveptr)) != NULL) {
- dummy = NULL;
-
- if (i >= vl->values_len) {
- /* Make sure i is invalid. */
- i = 0;
- break;
- }
-
- if (vl->time == 0) {
- 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);
- }
-
- continue;
- }
-
- 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 == 0))
- return -1;
- return 0;
-} /* int parse_values */
-
-int parse_value_file(char const *path, value_t *ret_value, int ds_type) {
- FILE *fh;
- char buffer[256];
-
- fh = fopen(path, "r");
- if (fh == NULL)
- return -1;
-
- if (fgets(buffer, sizeof(buffer), fh) == NULL) {
- fclose(fh);
- return -1;
- }
-
- fclose(fh);
-
- strstripnewline(buffer);
-
- return parse_value(buffer, ret_value, ds_type);
-} /* int parse_value_file */
-
-#if !HAVE_GETPWNAM_R
-int getpwnam_r(const char *name, struct passwd *pwbuf, char *buf, size_t buflen,
- struct passwd **pwbufp) {
-#ifndef HAVE_GETPWNAM
- return -1;
-#else
- 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;
-#endif /* HAVE_GETPWNAM */
-} /* 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) {
- P_ERROR("walk_directory: Cannot open '%s': %s", dir, STRERRNO);
- 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)) {
- P_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 + 1;
- else
- diff = (18446744073709551615ULL - old_value) + new_value + 1;
- } 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(gauge_t *ret_rate, /* {{{ */
- value_t value, int ds_type, cdtime_t t,
- value_to_rate_state_t *state) {
- gauge_t 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) {
- state->last_value = value;
- state->last_time = t;
- return EAGAIN;
- }
-
- switch (ds_type) {
- case DS_TYPE_DERIVE: {
- derive_t diff = value.derive - state->last_value.derive;
- *ret_rate = ((gauge_t)diff) / ((gauge_t)interval);
- break;
- }
- case DS_TYPE_GAUGE: {
- *ret_rate = value.gauge;
- break;
- }
- case DS_TYPE_COUNTER: {
- counter_t diff = counter_diff(state->last_value.counter, value.counter);
- *ret_rate = ((gauge_t)diff) / ((gauge_t)interval);
- break;
- }
- case DS_TYPE_ABSOLUTE: {
- absolute_t diff = value.absolute;
- *ret_rate = ((gauge_t)diff) / ((gauge_t)interval);
- break;
- }
- default:
- return EINVAL;
- }
-
- state->last_value = value;
- 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;
- int status;
- int service_number;
-
- if (service_name == NULL)
- return -1;
-
- struct addrinfo ai_hints = {.ai_family = AF_UNSPEC};
-
- status = getaddrinfo(/* node = */ NULL, service_name, &ai_hints, &ai_list);
- if (status != 0) {
- P_ERROR("service_name_to_port_number: getaddrinfo failed: %s",
- gai_strerror(status));
- return -1;
- }
-
- service_number = -1;
- for (struct addrinfo *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 */
-
-void set_sock_opts(int sockfd) /* {{{ */
-{
- int status;
- int socktype;
-
- status = getsockopt(sockfd, SOL_SOCKET, SO_TYPE, &socktype,
- &(socklen_t){sizeof(socktype)});
- if (status != 0) {
- P_WARNING("set_sock_opts: failed to determine socket type");
- return;
- }
-
- if (socktype == SOCK_STREAM) {
- status =
- setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE, &(int){1}, sizeof(int));
- if (status != 0)
- P_WARNING("set_sock_opts: failed to set socket keepalive flag");
-
-#ifdef TCP_KEEPIDLE
- int tcp_keepidle = ((CDTIME_T_TO_MS(plugin_get_interval()) - 1) / 100 + 1);
- status = setsockopt(sockfd, IPPROTO_TCP, TCP_KEEPIDLE, &tcp_keepidle,
- sizeof(tcp_keepidle));
- if (status != 0)
- P_WARNING("set_sock_opts: failed to set socket tcp keepalive time");
-#endif
-
-#ifdef TCP_KEEPINTVL
- int tcp_keepintvl =
- ((CDTIME_T_TO_MS(plugin_get_interval()) - 1) / 1000 + 1);
- status = setsockopt(sockfd, IPPROTO_TCP, TCP_KEEPINTVL, &tcp_keepintvl,
- sizeof(tcp_keepintvl));
- if (status != 0)
- P_WARNING("set_sock_opts: failed to set socket tcp keepalive interval");
-#endif
- }
-} /* }}} void set_sock_opts */
-
-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) /* {{{ */
-{
- for (size_t i = 0; i < array_len; i++)
- sfree(array[i]);
- sfree(array);
-} /* }}} void strarray_free */
-
-#if HAVE_CAPABILITY
-int check_capability(int arg) /* {{{ */
-{
- cap_value_t cap_value = (cap_value_t)arg;
- cap_t cap;
- cap_flag_value_t cap_flag_value;
-
- if (!CAP_IS_SUPPORTED(cap_value))
- return -1;
-
- if (!(cap = cap_get_proc())) {
- P_ERROR("check_capability: cap_get_proc failed.");
- return -1;
- }
-
- if (cap_get_flag(cap, cap_value, CAP_EFFECTIVE, &cap_flag_value) < 0) {
- P_ERROR("check_capability: cap_get_flag failed.");
- cap_free(cap);
- return -1;
- }
- cap_free(cap);
-
- return cap_flag_value != CAP_SET;
-} /* }}} int check_capability */
-#else
-int check_capability(__attribute__((unused)) int arg) /* {{{ */
-{
- P_WARNING("check_capability: unsupported capability implementation. "
- "Some plugin(s) may require elevated privileges to work properly.");
- return 0;
-} /* }}} int check_capability */
-#endif /* HAVE_CAPABILITY */
projects / collectd.git / blobdiff