implemented config file stack; to be used for include support

git-svn-id: https://svn.testnett.uninett.no/radsecproxy/trunk@198 e88ac4ed-0b26-0410-9574-a7f39faa03bf

5 files changed, 64 insertions, 9 deletions

diff --git a/gconfig.c b/gconfig.c
index 8040190..05efcec 100644
--- a/gconfig.c
+++ b/gconfig.c
@@ -46,6 +46,51 @@ char *strtokenquote(char *s, char **token, char *del, char *quote, char *comment
     return t + 1;
 }
 
+FILE *pushgconffile(struct gconffile **cf, const char *path) {
+    int i;
+    struct gconffile *newcf;
+    FILE *f;
+
+    f = fopen(path, "r");
+    if (!f) {
+        debug(DBG_INFO, "could not read config file %s", path);
+	return NULL;
+    }
+    if (!*cf) {
+	newcf = malloc(sizeof(struct gconffile) * 2);
+	if (!newcf)
+	    debugx(1, DBG_ERR, "malloc failed");
+	newcf[1].path = NULL;
+    } else {
+	for (i = 0; (*cf)[i].path; i++);
+	newcf = realloc(*cf, sizeof(struct gconffile) * (i + 2));
+	if (!newcf)
+	    debugx(1, DBG_ERR, "malloc failed");
+	memmove(newcf + 1, newcf, sizeof(struct gconffile) * (i + 1));
+    }
+    newcf[0].file = f;
+    newcf[0].path = stringcopy(path, 0);
+    *cf = newcf;
+    return f;
+}
+
+FILE *popgconffile(struct gconffile **cf) {
+    int i;
+
+    if (!*cf)
+	return NULL;
+    for (i = 0; (*cf)[i].path; i++);
+    if (i && (*cf)[0].file)
+	fclose((*cf)[0].file);
+    if (i < 2) {
+	free(*cf);
+	*cf = NULL;
+	return NULL;
+    }
+    memmove(*cf, *cf + 1, sizeof(struct gconffile) * i);
+    return (*cf)[0].file;
+}
+
 /* Parses config with following syntax:
  * One of these:
  * option-name value
diff --git a/gconfig.h b/gconfig.h
index d546b08..f580169 100644
--- a/gconfig.h
+++ b/gconfig.h
@@ -2,4 +2,11 @@
 #define CONF_CBK 2
 #define CONF_MSTR 3
 
+struct gconffile {
+    char *path;
+    FILE *file;
+};
+
 void getgenericconfig(FILE *f, char *block, ...);
+FILE *pushgconffile(struct gconffile **cf, const char *path);
+FILE *popgconffile(struct gconffile **cf);
diff --git a/radsecproxy.c b/radsecproxy.c
index ea55c17..aa01bb9 100644
--- a/radsecproxy.c
+++ b/radsecproxy.c
@@ -2431,28 +2431,29 @@ void addrealm(char *value, char **servers, char *message) {
     debug(DBG_DBG, "addrealm: added realm %s", value);
 }
 
-FILE *openconfigfile(const char *filename) {
+struct gconffile *openconfigfile(const char *filename) {
     FILE *f;
     char pathname[100], *base = NULL;
+    struct gconffile *cf = NULL;
     
-    f = fopen(filename, "r");
+    f = pushgconffile(&cf, filename);
     if (f) {
 	debug(DBG_DBG, "reading config file %s", filename);
-	return f;
+	return cf;
     }
 
     if (strlen(filename) + 1 <= sizeof(pathname)) {
 	/* basename() might modify the string */
 	strcpy(pathname, filename);
 	base = basename(pathname);
-	f = fopen(base, "r");
+	f = pushgconffile(&cf, base);
     }
 
     if (!f)
 	debugx(1, DBG_ERR, "could not read config file %s nor %s\n%s", filename, base, strerror(errno));
     
     debug(DBG_DBG, "reading config file %s", base);
-    return f;
+    return cf;
 }
 
 int addmatchcertattr(struct clsrvconf *conf, char *matchcertattr) {
@@ -2689,8 +2690,10 @@ void conftls_cb(FILE *f, char *block, char *opt, char *val) {
 void getmainconfig(const char *configfile) {
     FILE *f;
     char *loglevel = NULL;
+    struct gconffile *cfs;
 
-    f = openconfigfile(configfile);
+    cfs = openconfigfile(configfile);
+    f = cfs->file;
     memset(&options, 0, sizeof(options));
     
     clconfs = list_create();
@@ -2723,7 +2726,7 @@ void getmainconfig(const char *configfile) {
 		     "TLS", CONF_CBK, conftls_cb,
 		     NULL
 		     );
-    fclose(f);
+    popgconffile(&cfs);
     tlsfree();
     
     if (loglevel) {
diff --git a/util.c b/util.c
index 0a811a8..c74b824 100644
--- a/util.c
+++ b/util.c
@@ -50,7 +50,7 @@ void err(char *format, ...) {
 }
 #endif
 
-char *stringcopy(char *s, int len) {
+char *stringcopy(const char *s, int len) {
     char *r;
     if (!len)
 	len = strlen(s);
diff --git a/util.h b/util.h
index 9ec4817..7d79856 100644
--- a/util.h
+++ b/util.h
@@ -1,6 +1,6 @@
 #include <sys/socket.h>
 
-char *stringcopy(char *s, int len);
+char *stringcopy(const char *s, int len);
 char *addr2string(struct sockaddr *addr, socklen_t len);
 void printfchars(char *prefixfmt, char *prefix, char *charfmt, char *chars, int len);
 int connectport(int type, char *host, char *port);