From 61a369b85e51e0d54e1651e4ff8c11fe4815a0c0 Mon Sep 17 00:00:00 2001
From: Luke Bratch <luke@bratch.co.uk>
Date: Thu, 16 May 2019 21:35:16 +0100
Subject: Move default configuration file location to $HOME/.blabouncer/ and
 create a default file automatically if it doesn't exist.

---
 blabouncer.c |  9 ++++++-
 config.c     | 87 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 config.h     |  7 +++++
 3 files changed, 102 insertions(+), 1 deletion(-)

diff --git a/blabouncer.c b/blabouncer.c
index 59cf8c1..8ed8d72 100644
--- a/blabouncer.c
+++ b/blabouncer.c
@@ -1375,7 +1375,14 @@ int main(int argc, char *argv[]) {
     exit(1);
   } else {
     // If none provided, set to default
-    strcpy(settings.conffile, "blabouncer.conf");
+    snprintf(settings.conffile, PATH_MAX, "%s/.blabouncer/blabouncer.conf", getenv("HOME"));
+    // Since this is the default, it might not exist yet, so let's check...
+    struct stat st = {0};
+    if (stat(settings.conffile, &st) == -1) {
+      // ...it doesn't exist, so let's create it
+      printf("Creating default configuration file '%s'.\n", settings.conffile);
+      createconfigfile(settings.conffile);
+    }
   }
 
   printf("Using configuration file '%s'.\n", settings.conffile);
diff --git a/config.c b/config.c
index af30910..a5d9c2f 100644
--- a/config.c
+++ b/config.c
@@ -127,3 +127,90 @@ int checkpassword(char *password, char *filename) {
   printf("checkpassword(): unexpectedly got to end of function, quitting.\n");
   exit(1);
 }
+
+// Create the default configuration file.
+// Return 1 on success, 0 on failure.
+int createconfigfile(char *filename) {
+  char *dirtmp;
+  char *dir;
+  dirtmp = strdup(filename);
+  dir = strdup(dirname(dirtmp));
+
+  // Make sure the parent directory exists
+  struct stat st = {0};
+  if (stat(dir, &st) == -1) {
+    if (mkdir(dir, 0700)) {
+      printf("Error creating config directory '%s'.\n", dir);
+      exit(1);
+    } else {
+      printf("Created config directory '%s'.\n", dir);
+    }
+  }
+
+  FILE *fp;
+//  char line[MAXCHAR];
+
+  fp = fopen(filename, "a");
+
+  if (fp == NULL) {
+    printf("error: could not open default configuration file '%s' for writing.\n", filename);
+    exit(1);
+  }
+
+  // Prepare the string
+  char *string =
+  "# blabouncer configuration file\n"
+  "# Entries must be in the form:\n"
+  "# option name, space, equals sign, space, double quote, option value, double quote\n"
+  "# e.g.\n"
+  "# realname = \"Mr Bla Bouncer\"\n"
+  "\n"
+  "nick = \"blabounce\"\n"
+  "username = \"blabounce\"\n"
+  "realname = \"Mr Bla Bouncer\"\n"
+  "\n"
+  "# How many seconds of replay log should be sent to connecting clients\n"
+  "replayseconds = \"7200\"\n"
+  "\n"
+  "# Connect password clients must provided to connect\n"
+  "password = \"bananas\"\n"
+  "\n"
+  "# Port the bouncer should listen on\n"
+  "clientport = \"1234\"\n"
+  "\n"
+  "# Enable TLS for clients connecting to the bouncer (\"1\" for yes or \"0\" for no)\n"
+  "# If \"0\" then certfile and keyfile need not be set\n"
+  "clienttls = \"1\"\n"
+  "\n"
+  "# Enable TLS for the bouncer connecting to the IRC server (\"1\" for yes or \"0\" for no)\n"
+  "servertls = \"1\"\n"
+  "\n"
+  "# Real IRC server the bouncer connects to\n"
+  "ircserver = \"irc.blatech.net\"\n"
+  "\n"
+  "# Real IRC server port\n"
+  "ircserverport = \"6697\"\n"
+  "\n"
+  "# Certificate file\n"
+  "# If clienttls = \"0\" then this need not be set\n"
+  "certfile = \"cert.pem\"\n"
+  "\n"
+  "# Certificate key file\n"
+  "# If clienttls = \"0\" then this need not be set\n"
+  "keyfile = \"key.pem\"\n"
+  "\n"
+  "# Base directory (defaults to $HOME/.blabouncer/)\n"
+  "# Things such as the logs directory will be placed below this\n"
+  "#basedir = \"/home/foo/.blabouncer/\"\n";
+
+  // Write complete string to file
+  if ((fprintf(fp, string)) < 0) {
+    printf("error: could not write to replay log file.\n");
+    exit(1);
+  }
+
+  fclose(fp);
+  return 0;
+
+exit(1);
+}
diff --git a/config.h b/config.h
index 3e96c19..4043f36 100644
--- a/config.h
+++ b/config.h
@@ -4,6 +4,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <libgen.h>
+#include <sys/stat.h>
+#include <limits.h>
 
 #define MAXCHAR 1000
 
@@ -22,4 +25,8 @@ int getconfint(char *confname, char *filename);
 // Return 0 for password mismatch, or 1 for password match.
 int checkpassword(char *password, char *filename);
 
+// Create the default configuration file.
+// Return 1 on success, 0 on failure.
+int createconfigfile(char *filename);
+
 #endif
-- 
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