Extend --conf-dir to allow filtering on file suffixes.

CHANGELOG

@@ -31,6 +31,10 @@ version 2.72
 	    advertisements for the prefix we're advertising. Thanks to 
 	    Ilya Ponetaev for the patch.
 
+	    Extend --conf-dir to allow filtering of files. So
+	    --conf-dir=/etc/dnsmasq.d,\*.conf
+	    will load all the files in /etc/dnsmasq.d which end in .conf
+ 
 
 version 2.71
             Subtle change to error handling to help DNSSEC validation 

dnsmasq.conf.example

@@ -640,3 +640,9 @@
 # Include another lot of configuration options.
 #conf-file=/etc/dnsmasq.more.conf
 #conf-dir=/etc/dnsmasq.d
+
+# Include all the files in a directory except those ending in .bak
+#conf-dir=/etc/dnsmasq.d,.bak
+
+# Include all files in a directory which end in .conf
+#conf-dir=/etc/dnsmasq.d/*.conf
\ No newline at end of file

man/dnsmasq.8

@@ -1725,12 +1725,16 @@ Specify a different configuration file. The conf-file option is also allowed in
 configuration files, to include multiple configuration files. A
 filename of "-" causes dnsmasq to read configuration from stdin.
 .TP
-.B \-7, --conf-dir=<directory>[,<file-extension>......]
+.B \-7, --conf-dir=<directory>[,<file-extension>......],
 Read all the files in the given directory as configuration
 files. If extension(s) are given, any files which end in those
 extensions are skipped. Any files whose names end in ~ or start with . or start and end
-with # are always skipped. This flag may be given on the command
-line or in a configuration file.
+with # are always skipped. If the extension starts with * then only files 
+which have that extension are loaded. So
+.B --conf-dir=/path/to/dir,*.conf
+loads all files with the suffix .conf in /path/to/dir. This flag may be given on the command
+line or in a configuration file. If giving it on the command line, be sure to
+escape * characters.
 .TP
 .B --servers-file=<file>
 A special case of 

src/option.c

@@ -1465,7 +1465,7 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
 	struct list {
 	  char *suffix;
 	  struct list *next;
-	} *ignore_suffix = NULL, *li;
+	} *ignore_suffix = NULL, *match_suffix = NULL, *li;
 	
 	comma = split(arg);
 	if (!(directory = opt_string_alloc(arg)))
@@ -1475,10 +1475,20 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
 	  {
 	    comma = split(arg);
 	    li = opt_malloc(sizeof(struct list));
+	    if (*arg == '*')
+	      {
+		li->next = match_suffix;
+		match_suffix = li;
+		/* Have to copy: buffer is overwritten */
+		li->suffix = opt_string_alloc(arg+1);
+	      }
+	    else
+	      {
 		li->next = ignore_suffix;
 		ignore_suffix = li;
 		/* Have to copy: buffer is overwritten */
 		li->suffix = opt_string_alloc(arg);
+	      }
 	  };
 	
 	if (!(dir_stream = opendir(directory)))
@@ -1496,6 +1506,20 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
 		ent->d_name[0] == '.')
 	      continue;
 
+	    if (match_suffix)
+	      {
+		for (li = match_suffix; li; li = li->next)
+		  {
+		    /* check for required suffices */
+		    size_t ls = strlen(li->suffix);
+		    if (len > ls &&
+			strcmp(li->suffix, &ent->d_name[len - ls]) == 0)
+		      break;
+		  }
+		if (!li)
+		  continue;
+	      }
+	    
 	    for (li = ignore_suffix; li; li = li->next)
 	      {
 		/* check for proscribed suffices */