Initial implementation with new config system.

1 files changed, 240 insertions, 0 deletions

diff --git a/module/conf.c b/module/conf.c
new file mode 100644
index 0000000..a0a3917
--- /dev/null
+++ b/module/conf.c
@@ -0,0 +1,240 @@
+/*
+ * Copyright (c) 2005, Stefan Walter
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *     * Redistributions of source code must retain the above
+ *       copyright notice, this list of conditions and the
+ *       following disclaimer.
+ *     * Redistributions in binary form must reproduce the
+ *       above copyright notice, this list of conditions and
+ *       the following disclaimer in the documentation and/or
+ *       other materials provided with the distribution.
+ *     * The names of contributors to this software may not be
+ *       used to endorse or promote products derived from this
+ *       software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+ * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ *
+ * CONTRIBUTORS
+ *  Stef Walter <stef@memberwebs.com>
+ */
+
+#include "config.h"
+
+#include "conf.h"
+
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include <assert.h>
+#include <ctype.h>
+#include <dirent.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+static void
+errmsg (const char *filename, const char* msg, ...)
+{
+	#define MAX_MSGLEN  1024
+	char buf[MAX_MSGLEN];
+	va_list ap;
+
+	va_start (ap, msg);
+	vsnprintf (buf, MAX_MSGLEN, msg, ap);
+	buf[MAX_MSGLEN - 1] = 0;
+	conf_error (filename, buf);
+	va_end (ap);
+}
+
+static void
+strcln (char* data, char ch)
+{
+	char* p;
+	for (p = data; *data; data++, p++) {
+		while (*data == ch)
+			data++;
+		*p = *data;
+	}
+
+	/* Renull terminate */
+	*p = 0;
+}
+
+static char*
+strbtrim (const char* data)
+{
+	while (*data && isspace (*data))
+		++data;
+	return (char*)data;
+}
+
+static void
+stretrim (char* data)
+{
+	char* t = data + strlen (data);
+	while (t > data && isspace (*(t - 1))) {
+		t--;
+		*t = 0;
+	}
+}
+
+static char*
+strtrim (char* data)
+{
+	data = (char*)strbtrim (data);
+	stretrim (data);
+	return data;
+}
+
+/* -----------------------------------------------------------------------------
+ * CONFIG PARSER
+ */
+
+static char*
+read_config_file (const char* filename, int flags)
+{
+	char* config = NULL;
+	FILE* f = NULL;
+	long len;
+
+	assert (filename);
+
+	f = fopen (filename, "r");
+	if (f == NULL) {
+		if ((flags & CONF_IGNORE_MISSING) &&
+		    (errno == ENOENT || errno == ENOTDIR)) {
+			config = strdup ("\n");
+			if (!config)
+				errno = ENOMEM;
+			return config;
+		}
+		errmsg (filename, "couldn't open config file: %s", filename);
+		return NULL;
+	}
+
+	/* Figure out size */
+	if (fseek (f, 0, SEEK_END) == -1 ||
+	    (len = ftell (f)) == -1 ||
+	    fseek (f, 0, SEEK_SET) == -1) {
+		errmsg (filename, "couldn't seek config file: %s", filename);
+		return NULL;
+	}
+
+	if ((config = (char*)malloc (len + 2)) == NULL) {
+		errmsg (filename, "out of memory");
+		errno = ENOMEM;
+		return NULL;
+	}
+
+	/* And read in one block */
+	if (fread (config, 1, len, f) != len) {
+		errmsg (filename, "couldn't read config file: %s", filename);
+		return NULL;
+	}
+
+	fclose (f);
+
+	/* Null terminate the data */
+	config[len] = '\n';
+	config[len + 1] = 0;
+
+	/* Remove nasty dos line endings */
+	strcln (config, '\r');
+
+	return config;
+}
+
+hash_t*
+conf_parse_file (const char* filename, int flags)
+{
+	char *name;
+	char *value;
+	hash_t *ht = NULL;
+	char *config;
+	char *next;
+	char *end;
+
+	assert (filename);
+
+	/* Adds an extra newline to end of file */
+	config = read_config_file (filename, flags);
+	if (!config)
+		return NULL;
+
+	ht = hash_create (hash_string_hash, hash_string_equal, free, free);
+	next = config;
+
+	/* Go through lines and process them */
+	while ((end = strchr (next, '\n')) != NULL) {
+		*end = 0;
+		name = strbtrim (next);
+		next = end + 1;
+
+		/* Empty lines / comments at start */
+		if (!*name || *name == '#')
+			continue;
+
+		/* Look for the break between name = value on the same line */
+		value = name + strcspn (name, ":=");
+		if (!*value) {
+			errmsg (filename, "%s: invalid config line: %s", filename, name);
+			errno = EINVAL;
+			break;
+		}
+
+		/* Null terminate and split value part */
+		*value = 0;
+		value++;
+
+		name = strtrim (name);
+		value = strtrim (value);
+
+		name = strdup (name);
+		if (!name) {
+			errno = ENOMEM;
+			break;
+		}
+		value = strdup (value);
+		if (!value) {
+			free (name);
+			errno = ENOMEM;
+			break;
+		}
+		if (!hash_set (ht, name, value)) {
+			free (name);
+			free (value);
+			errno = ENOMEM;
+			break;
+		}
+	}
+
+	/* Unsuccessful? */
+	if (end != NULL) {
+		hash_free (ht);
+		ht = NULL;
+	}
+
+	free (config);
+	return ht;
+}