/**
* collectd - src/common.c
- * Copyright (C) 2005 Florian octo Forster
+ * Copyright (C) 2005-2008 Florian octo Forster
*
- * This program is free software; you can redistribute it and/
- * or modify it under the terms of the GNU General Public Li-
- * cence as published by the Free Software Foundation; either
- * version 2 of the Licence, or any later version.
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; only version 2 of the License is applicable.
*
- * This program is distributed in the hope that it will be use-
- * ful, but WITHOUT ANY WARRANTY; without even the implied war-
- * ranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- * See the GNU General Public Licence for more details.
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
*
- * You should have received a copy of the GNU General Public
- * Licence along with this program; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
- * USA.
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Authors:
* Florian octo Forster <octo at verplant.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 "utils_debug.h"
+#include "plugin.h"
+
+#if HAVE_PTHREAD_H
+# include <pthread.h>
+#endif
+
+#ifdef HAVE_MATH_H
+# include <math.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
-#ifdef HAVE_LIBRRD
-static char *rra_def[] =
+#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 *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)
{
- "RRA:AVERAGE:0.2:6:1500",
- "RRA:AVERAGE:0.1:180:1680",
- "RRA:AVERAGE:0.1:2160:1520",
- "RRA:MIN:0.2:6:1500",
- "RRA:MIN:0.1:180:1680",
- "RRA:MIN:0.1:2160:1520",
- "RRA:MAX:0.2:6:1500",
- "RRA:MAX:0.1:180:1680",
- "RRA:MAX:0.1:2160:1520",
- NULL
-};
-static int rra_num = 9;
-#endif /* HAVE_LIBRRD */
-
-void
-sstrncpy(char *d, const char *s, int len)
+ void *r;
+
+ if ((r = malloc (size)) == NULL)
+ {
+ ERROR ("Not enough memory.");
+ exit (3);
+ }
+
+ return (r);
+} /* void *smalloc */
+
+#if 0
+void sfree (void **ptr)
{
- strncpy(d, s, len);
- d[len - 1] = 0;
+ if (ptr == NULL)
+ return;
+
+ if (*ptr != NULL)
+ free (*ptr);
+
+ *ptr = NULL;
}
+#endif
-char *
-sstrdup(const char *s)
+ssize_t sread (int fd, void *buf, size_t count)
{
- char *r = strdup(s);
- if(r == NULL) {
- DBG("Not enough memory.");
- exit(3);
+ 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 r;
+
+ return (0);
}
-void *
-smalloc(size_t size)
+
+ssize_t swrite (int fd, const void *buf, size_t count)
{
- void *r = malloc(size);
- if(r == NULL) {
- DBG("Not enough memory.");
- exit(3);
+ 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 r;
+
+ return (0);
}
int strsplit (char *string, char **fields, size_t size)
{
size_t i;
char *ptr;
+ char *saveptr;
i = 0;
ptr = string;
- while ((fields[i] = strtok (ptr, " \t")) != NULL)
+ saveptr = NULL;
+ while ((fields[i] = strtok_r (ptr, " \t\r\n", &saveptr)) != NULL)
{
ptr = NULL;
i++;
return (i);
}
-#ifdef HAVE_LIBRRD
-int check_create_dir (char *dir)
+int strjoin (char *dst, size_t dst_len,
+ char **fields, size_t fields_num,
+ const char *sep)
{
- struct stat statbuf;
+ size_t field_len;
+ size_t sep_len;
+ int i;
+
+ memset (dst, '\0', dst_len);
- if (stat (dir, &statbuf) == -1)
+ 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 (errno == ENOENT)
+ if ((i > 0) && (sep_len > 0))
{
- if (mkdir (dir, 0755) == -1)
- {
- syslog (LOG_ERR, "mkdir %s: %s", dir, strerror (errno));
+ if (dst_len <= sep_len)
return (-1);
- }
+
+ strncat (dst, sep, dst_len);
+ dst_len -= sep_len;
}
- else
- {
- syslog (LOG_ERR, "stat %s: %s", dir, strerror (errno));
+
+ field_len = strlen (fields[i]);
+
+ if (dst_len <= field_len)
return (-1);
- }
- }
- else if (!S_ISDIR (statbuf.st_mode))
- {
- syslog (LOG_ERR, "stat %s: Not a directory!", dir);
- return (-1);
+
+ strncat (dst, fields[i], dst_len);
+ dst_len -= field_len;
}
- return (0);
+ return (strlen (dst));
}
-int rrd_create_file (char *filename, char **ds_def, int ds_num)
+int strsubstitute (char *str, char c_from, char c_to)
{
- char **argv;
- int argc;
- int i, j;
- int status = 0;
+ int ret;
- argc = ds_num + rra_num + 4;
+ if (str == NULL)
+ return (-1);
- if ((argv = (char **) malloc (sizeof (char *) * (argc + 1))) == NULL)
+ ret = 0;
+ while (*str != '\0')
{
- syslog (LOG_ERR, "rrd_create failed: %s", strerror (errno));
- return (-1);
+ if (*str == c_from)
+ {
+ *str = c_to;
+ ret++;
+ }
+ str++;
}
- argv[0] = "create";
- argv[1] = filename;
- argv[2] = "-s";
- argv[3] = "10";
+ return (ret);
+} /* int strsubstitute */
- j = 4;
- for (i = 0; i < ds_num; i++)
- argv[j++] = ds_def[i];
- for (i = 0; i < rra_num; i++)
- argv[j++] = rra_def[i];
- argv[j] = NULL;
+int escape_slashes (char *buf, int buf_len)
+{
+ int i;
- optind = 0; /* bug in librrd? */
- rrd_clear_error ();
- if (rrd_create (argc, argv) == -1)
+ if (strcmp (buf, "/") == 0)
{
- syslog (LOG_ERR, "rrd_create failed: %s: %s", filename, rrd_get_error ());
- status = -1;
+ if (buf_len < 5)
+ return (-1);
+
+ strncpy (buf, "root", buf_len);
+ return (0);
}
- free (argv);
-
- return (status);
-}
-#endif /* HAVE_LIBRRD */
+ if (buf_len <= 1)
+ return (0);
-int rrd_update_file (char *host, char *file, char *values,
- char **ds_def, int ds_num)
+ /* Move one to the left */
+ if (buf[0] == '/')
+ memmove (buf, buf + 1, buf_len - 1);
+
+ for (i = 0; i < buf_len - 1; i++)
+ {
+ if (buf[i] == '\0')
+ break;
+ else if (buf[i] == '/')
+ buf[i] = '_';
+ }
+ buf[i] = '\0';
+
+ return (0);
+} /* int escape_slashes */
+
+int timeval_cmp (struct timeval tv0, struct timeval tv1, struct timeval *delta)
{
-#ifdef HAVE_LIBRRD
- struct stat statbuf;
- char full_file[1024];
- char *argv[4] = { "update", full_file, values, NULL };
+ struct timeval *larger;
+ struct timeval *smaller;
- /* host == NULL => local mode */
- if (host != NULL)
+ int status;
+
+ NORMALIZE_TIMEVAL (tv0);
+ NORMALIZE_TIMEVAL (tv1);
+
+ if ((tv0.tv_sec == tv1.tv_sec) && (tv0.tv_usec == tv1.tv_usec))
{
- if (check_create_dir (host))
- return (-1);
+ if (delta != NULL) {
+ delta->tv_sec = 0;
+ delta->tv_usec = 0;
+ }
+ return (0);
+ }
- if (snprintf (full_file, 1024, "%s/%s", host, file) >= 1024)
- return (-1);
+ 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
{
- if (snprintf (full_file, 1024, "%s", file) >= 1024)
- return (-1);
+ larger = &tv0;
+ smaller = &tv1;
+ status = 1;
}
- if (stat (full_file, &statbuf) == -1)
- {
- if (errno == ENOENT)
- {
- if (rrd_create_file (full_file, ds_def, ds_num))
- return (-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
{
- syslog (LOG_ERR, "stat %s: %s", full_file, strerror (errno));
- return (-1);
+ --delta->tv_sec;
+ delta->tv_usec = 1000000 + larger->tv_usec - smaller->tv_usec;
}
}
- else if (!S_ISREG (statbuf.st_mode))
- {
- syslog (LOG_ERR, "stat %s: Not a regular file!", full_file);
+
+ 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;
}
- optind = 0; /* bug in librrd? */
- rrd_clear_error ();
- if (rrd_update (3, argv) == -1)
+ /*
+ * For each component, do..
+ */
+ for (i = 0; i < (fields_num - last_is_file); i++)
{
- syslog (LOG_WARNING, "rrd_update failed: %s: %s", full_file, rrd_get_error ());
- return (-1);
+ /*
+ * 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)
+ {
+ if (errno == ENOENT)
+ {
+ if (mkdir (dir, 0755) == 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;
+ }
}
-#endif /* HAVE_LIBRRD */
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, 128, "%s,%i,%s", module, instance, name);
- ident[127] = '\0';
+ ssnprintf (ident, sizeof (ident), "%s,%i,%s", module, instance, name);
+ *ksp_ptr = kstat_lookup (kc, module, instance, name);
if (*ksp_ptr == NULL)
{
- if ((*ksp_ptr = kstat_lookup (kc, module, instance, name)) == NULL)
- {
- syslog (LOG_ERR, "Cound not find kstat %s", ident);
- return (-1);
- }
+ ERROR ("get_kstat: Cound not find kstat %s", ident);
+ return (-1);
+ }
- if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED)
- {
- syslog (LOG_WARNING, "kstat %s has wrong type", ident);
- *ksp_ptr = NULL;
- 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
if (kstat_read (kc, *ksp_ptr, NULL) == -1)
{
- syslog (LOG_WARNING, "kstat %s could not be read", ident);
+ ERROR ("get_kstat: kstat %s could not be read", ident);
return (-1);
}
if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED)
{
- syslog (LOG_WARNING, "kstat %s has wrong type", ident);
+ ERROR ("get_kstat: kstat %s has wrong type", ident);
return (-1);
}
#else
if (ksp == NULL)
{
- fprintf (stderr, "ERROR: %s:%i: ksp == NULL\n", __FILE__, __LINE__);
+ ERROR ("ERROR: %s:%i: ksp == NULL\n", __FILE__, __LINE__);
return (-1LL);
}
else if (ksp->ks_type != KSTAT_TYPE_NAMED)
{
- fprintf (stderr, "ERROR: %s:%i: ksp->ks_type != KSTAT_TYPE_NAMED\n", __FILE__, __LINE__);
+ ERROR ("ERROR: %s:%i: ksp->ks_type != KSTAT_TYPE_NAMED\n", __FILE__, __LINE__);
return (-1LL);
}
#endif
else if (kn->data_type == KSTAT_DATA_UINT64)
retval = (long long) kn->value.ui64; /* XXX: Might overflow! */
else
- syslog (LOG_WARNING, "get_kstat_value: Not a numeric value: %s", name);
+ WARNING ("get_kstat_value: Not a numeric value: %s", name);
return (retval);
}
#endif /* HAVE_LIBKSTAT */
+
+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 */
+
+#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)
+{
+ int status;
+
+ assert (plugin != NULL);
+ assert (type != NULL);
+
+ if ((plugin_instance == NULL) || (strlen (plugin_instance) == 0))
+ {
+ if ((type_instance == NULL) || (strlen (type_instance) == 0))
+ status = ssnprintf (ret, ret_len, "%s/%s/%s",
+ hostname, plugin, type);
+ else
+ status = ssnprintf (ret, ret_len, "%s/%s/%s-%s",
+ hostname, plugin, type,
+ type_instance);
+ }
+ else
+ {
+ if ((type_instance == NULL) || (strlen (type_instance) == 0))
+ status = ssnprintf (ret, ret_len, "%s/%s-%s/%s",
+ hostname, plugin, plugin_instance,
+ type);
+ else
+ status = ssnprintf (ret, ret_len, "%s/%s-%s/%s-%s",
+ hostname, plugin, plugin_instance,
+ type, type_instance);
+ }
+
+ if ((status < 1) || (status >= ret_len))
+ return (-1);
+ return (0);
+} /* int format_name */
+
+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_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)
+ break;
+
+ if (i == -1)
+ {
+ if (strcmp ("N", ptr) == 0)
+ vl->time = time (NULL);
+ else
+ vl->time = (time_t) atoi (ptr);
+ }
+ else
+ {
+ if (strcmp ("U", ptr) == 0)
+ vl->values[i].gauge = NAN;
+ else if (ds->ds[i].type == DS_TYPE_COUNTER)
+ vl->values[i].counter = atoll (ptr);
+ else if (ds->ds[i].type == DS_TYPE_GAUGE)
+ vl->values[i].gauge = atof (ptr);
+ }
+
+ 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)
+{
+ 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 (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);
+}
+
+int read_file_contents (const char *filename, char *buf, int bufsize)
+{
+ FILE *fh;
+ int n;
+
+ if ((fh = fopen (filename, "r")) == NULL)
+ return -1;
+
+ n = fread(buf, 1, bufsize, fh);
+ fclose(fh);
+
+ return n;
+}
+
+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_to_gauge */
projects / collectd.git / blobdiff