support relative paths in musiconhold.conf, which makes moh work by default when Asterisk was configured using --prefix and 'make samples' is run

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@149917 65c4cc65-6c06-0410-ace0-fbb531ad65f3

CHANGES

@@ -33,6 +33,8 @@ Miscellaneous
    as previously used on the last "exten" line.  For example:
      exten => 123,1,NoOp(something)
      same  =>     n,SomethingElse()
+ * musiconhold.conf classes of type 'files' can now use relative directory paths,
+   which are interpreted as relative to the astvarlibdir setting in asterisk.conf.
 
 ------------------------------------------------------------------------------
 --- Functionality changes from Asterisk 1.6.0 to Asterisk 1.6.1  -------------

configs/musiconhold.conf.sample

@@ -29,6 +29,11 @@
 ; Files can be present in as many formats as you wish, and the
 ; 'best' format will be chosen at playback time.
 ;
+; The path specified can be either an absolute path (starts with '/'),
+; or a relative path; relative paths are interpreted as being relative
+; to the 'astvarlibdir' in asterisk.conf, which defaults to
+; /var/lib/asterisk.
+;
 ; NOTE:
 ; If you are not using "autoload" in modules.conf, then you
 ; must ensure that the format modules for any formats you wish
@@ -39,11 +44,11 @@
 
 [default]
 mode=files
-directory=/var/lib/asterisk/moh
+directory=moh
 ;
 ;[native-random]
 ;mode=files
-;directory=/var/lib/asterisk/moh
+;directory=moh
 ;digit=#        ; If this option is set for a class, then when callers are
 ;               ; listening to music on hold, they can press this digit, and
 ;               ; they will switch to listening to this music class.
@@ -51,7 +56,7 @@ directory=/var/lib/asterisk/moh
 
 ;[native-alphabetical]
 ;mode=files
-;directory=/var/lib/asterisk/moh
+;directory=moh
 ;sort=alpha     ; Sort the files in alphabetical order.  If this option is
 ;               ; not specified, the sort order is undefined.
 

res/res_musiconhold.c

@@ -65,6 +65,7 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 #include "asterisk/stringfields.h"
 #include "asterisk/linkedlists.h"
 #include "asterisk/manager.h"
+#include "asterisk/paths.h"
 
 #define INITIAL_NUM_FILES   8
 
@@ -906,6 +907,7 @@ static int moh_scan_files(struct mohclass *class) {
 
 	DIR *files_DIR;
 	struct dirent *files_dirent;
+	char dir_path[PATH_MAX];
 	char path[PATH_MAX];
 	char filepath[PATH_MAX];
 	char *ext;
@@ -913,9 +915,17 @@ static int moh_scan_files(struct mohclass *class) {
 	int dirnamelen;
 	int i;
 
-	files_DIR = opendir(class->dir);
+	if (class->dir[0] != '/') {
+		ast_copy_string(dir_path, ast_config_AST_VAR_DIR, sizeof(dir_path));
+		strncat(dir_path, "/", sizeof(dir_path));
+		strncat(dir_path, class->dir, sizeof(dir_path));
+	} else {
+		ast_copy_string(dir_path, class->dir, sizeof(dir_path));
+	}
+	ast_debug(4, "Scanning '%s' for files for class '%s'\n", dir_path, class->name);
+	files_DIR = opendir(dir_path);
 	if (!files_DIR) {
-		ast_log(LOG_WARNING, "Cannot open dir %s or dir does not exist\n", class->dir);
+		ast_log(LOG_WARNING, "Cannot open dir %s or dir does not exist\n", dir_path);
 		return -1;
 	}
 
@@ -923,9 +933,9 @@ static int moh_scan_files(struct mohclass *class) {
 		ast_free(class->filearray[i]);
 
 	class->total_files = 0;
-	dirnamelen = strlen(class->dir) + 2;
+	dirnamelen = strlen(dir_path) + 2;
 	getcwd(path, sizeof(path));
-	chdir(class->dir);
+	chdir(dir_path);
 	while ((files_dirent = readdir(files_DIR))) {
 		/* The file name must be at least long enough to have the file type extension */
 		if ((strlen(files_dirent->d_name) < 4))
@@ -939,7 +949,7 @@ static int moh_scan_files(struct mohclass *class) {
 		if (!strchr(files_dirent->d_name, '.'))
 			continue;
 
-		snprintf(filepath, sizeof(filepath), "%s/%s", class->dir, files_dirent->d_name);
+		snprintf(filepath, sizeof(filepath), "%s/%s", dir_path, files_dirent->d_name);
 
 		if (stat(filepath, &statbuf))
 			continue;