X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=src%2Fcommon.c;h=3ec4c6e1442947422eff75e5a3ed3f6d24dc7224;hb=f453199292b45007e5078f568f3bce2e8c8b4067;hp=3f6eecc363bde456e6dec8a96e79c14610e86031;hpb=c28bc580c110c78741d0805c7652e05d994b0ff4;p=collectd.git

diff --git a/src/common.c b/src/common.c
index 3f6eecc3..3ec4c6e1 100644
--- a/src/common.c
+++ b/src/common.c
@@ -77,18 +77,24 @@ int ssnprintf (char *dest, size_t n, const char *format, ...)
 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_
@@ -143,12 +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)
@@ -236,7 +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++;
@@ -341,28 +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;
+
+	int status;
 
-	ret->tv_sec  = tv0->tv_sec - tv1->tv_sec;
-	ret->tv_nsec = 1000 * ((long) (tv0->tv_usec - tv1->tv_usec));
+	NORMALIZE_TIMEVAL (tv0);
+	NORMALIZE_TIMEVAL (tv1);
 
-	if (ret->tv_nsec < 0)
+	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)
 {
@@ -377,7 +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;
 
 	/*
@@ -537,12 +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
@@ -864,3 +911,77 @@ int notification_init (notification_t *n, int severity, const char *message,
 
 	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 */