Moved generic parts of the config file parser to the common library

Modified the eurephiadm client_config section to make use of the common
version as well.

Signed-off-by: David Sommerseth <dazo@users.sourceforge.net>

3 files changed, 191 insertions, 0 deletions

diff --git a/common/CMakeLists.txt b/common/CMakeLists.txt
index 9fcf8da..8048b0b 100644
--- a/common/CMakeLists.txt
+++ b/common/CMakeLists.txt
@@ -45,6 +45,7 @@ ADD_LIBRARY( eurephiacommon STATIC
              eurephia_log.c
              eurephia_nullsafe.c
              eurephia_values.c
+             eurephia_cfgfile.c
              passwd.c
              randstr.c
              sha512.c
diff --git a/common/eurephia_cfgfile.c b/common/eurephia_cfgfile.c
new file mode 100644
index 0000000..ac47ee7
--- /dev/null
+++ b/common/eurephia_cfgfile.c
@@ -0,0 +1,152 @@
+/* eurephia_cfgfile.c
+ *
+ *  Simple generic ini-style config file parser
+ *
+ *  GPLv2 only - Copyright (C) 2011
+ *               David Sommerseth <dazo@users.sourceforge.net>
+ *
+ *  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; version 2
+ *  of the License.
+ *
+ *  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 License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ */
+
+/**
+ * @file   eurephia_cfgfile.c
+ * @author David Sommerseth <dazo@users.sourceforge.net>
+ * @date   2011-07-23
+ *
+ * @brief A simple, generic ini-style config file parser
+ *
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <sys/stat.h>
+
+#include <eurephia_nullsafe.h>
+#include <eurephia_context.h>
+#include <eurephia_log.h>
+#include <eurephia_values.h>
+
+
+/**
+ * Parse one single configuration line into a eurephiaVALUES key/value
+ * pair.  It will also ignore comment lines, and also remove the
+ * comments on the line of the configuration line so that only the
+ * key/value information is extracted.
+ *
+ * @param line Input configuration line
+ *
+ * @return eurephiaVALUES pointer containing the parsed result.  On
+ *         error or if no valid config line was found, NULL is returned.
+ */
+static inline eurephiaVALUES *parse_config_line(eurephiaCTX *ctx, const char *line) {
+        char *cp = NULL, *key = NULL, *val = NULL, *ptr = NULL;
+        eurephiaVALUES *ret = NULL;
+
+        if( *line == '#' ) {
+                return NULL;
+        }
+
+        cp = strdup(line);
+        key = cp;
+        val = strpbrk(cp, "=");
+        if( val == NULL ) {
+                free_nullsafe(NULL, cp);
+                return NULL;
+        }
+        *val = '\0'; val++;
+
+        // Discard comments at the end of a line
+        if( (ptr = strpbrk(val, "#")) != NULL ) {
+                *ptr = '\0';
+        }
+
+        // Left trim
+        while( ((*key == 0x20) || (*key == 0x0A) || (*key == 0x0D)) ) {
+                key++;
+        }
+        while( ((*val == 0x20) || (*val == 0x0A) || (*val == 0x0D)) ) {
+                val++;
+        }
+
+        // Right trim
+        ptr = key + strlen_nullsafe(key) - 1;
+        while( ((*ptr == 0x20) || (*ptr == 0x0A) || (*ptr == 0x0D)) && (ptr > key) ) {
+                ptr--;
+        }
+        ptr++;
+        *ptr = '\0';
+
+        ptr = val + strlen_nullsafe(val) - 1;
+        while( ((*ptr == 0x20) || (*ptr == 0x0A) || (*ptr == 0x0D)) && (ptr > val) ) {
+                ptr--;
+        }
+        ptr++;
+        *ptr = '\0';
+
+        // Put key/value into a eurephiaVALUES struct and return it
+        ret = eCreate_value_space(ctx, 20);
+        ret->key = strdup(key);
+        ret->val = strdup(val);
+
+        free_nullsafe(ctx, cp);
+        return ret;
+}
+
+
+/**
+ * Parses a complete config file and puts it into an eurephiaVALUES
+ * key/value stack
+ *
+ * @param fname Complete file name with full path to the configuration
+ *        file to parse
+ *
+ * @return Returns a pointer to an eurephiaVALUES stack containing the
+ *         configuration on success, otherwise NULL.
+ */
+eurephiaVALUES *ecfg_ReadConfig(eurephiaCTX *ctx, const char *fname)
+{
+        FILE *fp = NULL;
+        char *buf = NULL;
+        eurephiaVALUES *cfg = NULL;
+        struct stat fi;
+
+        if( stat(fname, &fi) == -1 ) {
+                eurephia_log(ctx, LOG_CRITICAL, 0,
+                             "Could not open the config file: %s\n", fname);
+                return NULL;
+        }
+
+        if( (fp = fopen(fname, "r")) == NULL ) {
+                eurephia_log(ctx, LOG_CRITICAL, 0,
+                             "Could not open the config file: %s\n", fname);
+                return NULL;
+        }
+
+        buf = (char *) malloc_nullsafe(ctx, fi.st_size+2);
+
+        cfg = eCreate_value_space(ctx, 20);
+        while( fgets(buf, fi.st_size, fp) != NULL ) {
+                eurephiaVALUES *prm = parse_config_line(ctx, buf);
+                if( prm != NULL ) {
+                        eAdd_valuestruct(ctx, cfg, prm);
+                }
+        };
+        free_nullsafe(ctx, buf);
+        fclose(fp); fp = NULL;
+
+        return cfg;
+}
+
diff --git a/common/eurephia_cfgfile.h b/common/eurephia_cfgfile.h
new file mode 100644
index 0000000..b7f38e3
--- /dev/null
+++ b/common/eurephia_cfgfile.h
@@ -0,0 +1,38 @@
+/* eurephia_cfgfile.h
+ *
+ *  Simple generic ini-style config file parser
+ *
+ *  GPLv2 only - Copyright (C) 2011
+ *               David Sommerseth <dazo@users.sourceforge.net>
+ *
+ *  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; version 2
+ *  of the License.
+ *
+ *  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 License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ */
+
+/**
+ * @file   eurephia_cfgfile.h
+ * @author David Sommerseth <dazo@users.sourceforge.net>
+ * @date   2011-07-23
+ *
+ * @brief A simple, generic ini-style config file parser
+ *
+ */
+
+#ifndef EUREPHIA_CFGFILE_H_
+#define EUREPHIA_CFGFILE_H_
+
+eurephiaVALUES *ecfg_ReadConfig(eurephiaCTX *ctx, const char *cfgname);
+
+#endif /* EUREPHIA_CFGFILE_H_ */