X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=src%2Fcommon.c;h=3ec4c6e1442947422eff75e5a3ed3f6d24dc7224;hb=f453199292b45007e5078f568f3bce2e8c8b4067;hp=951bae306e834d15f3b7d1e66fb217740bedaff0;hpb=4320ac5ec142c87bcf634cd85b89eadea65011ff;p=collectd.git

diff --git a/src/common.c b/src/common.c
index 951bae30..3ec4c6e1 100644
--- a/src/common.c
+++ b/src/common.c
@@ -1,6 +1,6 @@
 /**
  * collectd - src/common.c
- * Copyright (C) 2005-2007  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 License as published by the
@@ -24,6 +24,7 @@
 # include "config.h"
 #endif
 
+#include "collectd.h"
 #include "common.h"
 #include "plugin.h"
 
@@ -48,27 +49,52 @@ extern kstat_ctl_t *kc;
 static pthread_mutex_t getpwnam_r_lock = PTHREAD_MUTEX_INITIALIZER;
 #endif
 
-void sstrncpy (char *d, const char *s, int len)
+#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 (d, s, len);
-	d[len - 1] = '\0';
-}
+	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);
 
-	if((r = strdup (s)) == 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)
 	{
-		DEBUG ("Not enough memory.");
-		exit(3);
+		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_
@@ -76,29 +102,44 @@ char *sstrdup (const char *s)
 char *sstrerror (int errnum, char *buf, size_t buflen)
 {
 	buf[0] = '\0';
-#ifdef STRERROR_R_CHAR_P
+
+#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'))
-				strncpy (buf, temp, buflen);
+				sstrncpy (buf, temp, buflen);
 			else
-				strncpy (buf, "strerror_r did not return "
+				sstrncpy (buf, "strerror_r did not return "
 						"an error message", buflen);
-			buf[buflen - 1] = '\0';
 		}
 	}
+/* #endif STRERROR_R_CHAR_P */
+
 #else
 	if (strerror_r (errnum, buf, buflen) != 0)
 	{
-		snprintf (buf, buflen, "Error #%i; "
+		ssnprintf (buf, buflen, "Error #%i; "
 				"Additionally, strerror_r failed.",
 				errnum);
 	}
 #endif /* STRERROR_R_CHAR_P */
-	buf[buflen - 1] = '\0';
+
 	return (buf);
 } /* char *sstrerror */
 
@@ -108,12 +149,12 @@ void *smalloc (size_t size)
 
 	if ((r = malloc (size)) == NULL)
 	{
-		DEBUG("Not enough memory.");
-		exit(3);
+		ERROR ("Not enough memory.");
+		exit (3);
 	}
 
-	return r;
-}
+	return (r);
+} /* void *smalloc */
 
 #if 0
 void sfree (void **ptr)
@@ -156,7 +197,7 @@ ssize_t sread (int fd, void *buf, size_t count)
 			return (-1);
 		}
 
-		assert (nleft >= status);
+		assert ((0 > status) || (nleft >= (size_t)status));
 
 		nleft = nleft - status;
 		ptr   = ptr   + status;
@@ -201,7 +242,7 @@ int strsplit (char *string, char **fields, size_t size)
 	i = 0;
 	ptr = string;
 	saveptr = NULL;
-	while ((fields[i] = strtok_r (ptr, " \t", &saveptr)) != NULL)
+	while ((fields[i] = strtok_r (ptr, " \t\r\n", &saveptr)) != NULL)
 	{
 		ptr = NULL;
 		i++;
@@ -217,8 +258,8 @@ int strjoin (char *dst, size_t dst_len,
 		char **fields, size_t fields_num,
 		const char *sep)
 {
-	int field_len;
-	int sep_len;
+	size_t field_len;
+	size_t sep_len;
 	int i;
 
 	memset (dst, '\0', dst_len);
@@ -230,7 +271,7 @@ int strjoin (char *dst, size_t dst_len,
 	if (sep != NULL)
 		sep_len = strlen (sep);
 
-	for (i = 0; i < fields_num; i++)
+	for (i = 0; i < (int)fields_num; i++)
 	{
 		if ((i > 0) && (sep_len > 0))
 		{
@@ -306,28 +347,69 @@ int escape_slashes (char *buf, int buf_len)
 	return (0);
 } /* int escape_slashes */
 
-int timeval_sub_timespec (struct timeval *tv0, struct timeval *tv1, struct timespec *ret)
+void replace_special (char *buffer, size_t buffer_size)
 {
-	if ((tv0 == NULL) || (tv1 == NULL) || (ret == NULL))
-		return (-2);
+	size_t i;
 
-	if ((tv0->tv_sec < tv1->tv_sec)
-			|| ((tv0->tv_sec == tv1->tv_sec) && (tv0->tv_usec < tv1->tv_usec)))
-		return (-1);
+	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;
 
-	ret->tv_sec  = tv0->tv_sec - tv1->tv_sec;
-	ret->tv_nsec = 1000 * ((long) (tv0->tv_usec - tv1->tv_usec));
+	int status;
 
-	if (ret->tv_nsec < 0)
+	NORMALIZE_TIMEVAL (tv0);
+	NORMALIZE_TIMEVAL (tv1);
+
+	if ((tv0.tv_sec == tv1.tv_sec) && (tv0.tv_usec == tv1.tv_usec))
 	{
-		assert (ret->tv_sec > 0);
+		if (delta != NULL) {
+			delta->tv_sec  = 0;
+			delta->tv_usec = 0;
+		}
+		return (0);
+	}
 
-		ret->tv_nsec += 1000000000;
-		ret->tv_sec  -= 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
+	{
+		larger  = &tv0;
+		smaller = &tv1;
+		status  = 1;
 	}
 
-	return (0);
-}
+	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)
 {
@@ -342,7 +424,7 @@ int check_create_dir (const char *file_orig)
 	char *saveptr;
 	int   last_is_file = 1;
 	int   path_is_absolute = 0;
-	int   len;
+	size_t len;
 	int   i;
 
 	/*
@@ -353,7 +435,7 @@ int check_create_dir (const char *file_orig)
 
 	if ((len = strlen (file_orig)) < 1)
 		return (-1);
-	else if (len >= 512)
+	else if (len >= sizeof (file_copy))
 		return (-1);
 
 	/*
@@ -368,8 +450,7 @@ int check_create_dir (const char *file_orig)
 	/*
 	 * Create a copy for `strtok_r' to destroy
 	 */
-	strncpy (file_copy, file_orig, 512);
-	file_copy[511] = '\0';
+	sstrncpy (file_copy, file_orig, sizeof (file_copy));
 
 	/*
 	 * Break into components. This will eat up several slashes in a row and
@@ -421,7 +502,7 @@ int check_create_dir (const char *file_orig)
 				if (mkdir (dir, 0755) == -1)
 				{
 					char errbuf[1024];
-					ERROR ("mkdir (%s): %s", dir,
+					ERROR ("check_create_dir: mkdir (%s): %s", dir,
 							sstrerror (errno,
 								errbuf, sizeof (errbuf)));
 					return (-1);
@@ -444,7 +525,7 @@ int check_create_dir (const char *file_orig)
 	}
 
 	return (0);
-}
+} /* check_create_dir */
 
 #ifdef HAVE_LIBKSTAT
 int get_kstat (kstat_t **ksp_ptr, char *module, int instance, char *name)
@@ -454,8 +535,7 @@ int get_kstat (kstat_t **ksp_ptr, char *module, int instance, char *name)
 	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);
 
 	if (*ksp_ptr == NULL)
 	{
@@ -504,12 +584,12 @@ long long get_kstat_value (kstat_t *ksp, char *name)
 #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
@@ -534,7 +614,7 @@ long long get_kstat_value (kstat_t *ksp, char *name)
 
 unsigned long long ntohll (unsigned long long n)
 {
-#if __BYTE_ORDER == __BIG_ENDIAN
+#if BYTE_ORDER == BIG_ENDIAN
 	return (n);
 #else
 	return (((unsigned long long) ntohl (n)) << 32) + ntohl (n >> 32);
@@ -543,13 +623,90 @@ unsigned long long ntohll (unsigned long long n)
 
 unsigned long long htonll (unsigned long long n)
 {
-#if __BYTE_ORDER == __BIG_ENDIAN
+#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,
@@ -563,21 +720,21 @@ int format_name (char *ret, int ret_len,
 	if ((plugin_instance == NULL) || (strlen (plugin_instance) == 0))
 	{
 		if ((type_instance == NULL) || (strlen (type_instance) == 0))
-			status = snprintf (ret, ret_len, "%s/%s/%s",
+			status = ssnprintf (ret, ret_len, "%s/%s/%s",
 					hostname, plugin, type);
 		else
-			status = snprintf (ret, ret_len, "%s/%s/%s-%s",
+			status = ssnprintf (ret, ret_len, "%s/%s/%s-%s",
 					hostname, plugin, type,
 					type_instance);
 	}
 	else
 	{
 		if ((type_instance == NULL) || (strlen (type_instance) == 0))
-			status = snprintf (ret, ret_len, "%s/%s-%s/%s",
+			status = ssnprintf (ret, ret_len, "%s/%s-%s/%s",
 					hostname, plugin, plugin_instance,
 					type);
 		else
-			status = snprintf (ret, ret_len, "%s/%s-%s/%s-%s",
+			status = ssnprintf (ret, ret_len, "%s/%s-%s/%s-%s",
 					hostname, plugin, plugin_instance,
 					type, type_instance);
 	}
@@ -726,4 +883,105 @@ int getpwnam_r (const char *name, struct passwd *pwbuf, char *buf,
 
 	return (status);
 } /* int getpwnam_r */
-#endif
+#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 */