Implement debugging to file and set the default configuration file to be that.

1 files changed, 65 insertions, 2 deletions

diff --git a/blabouncer.c b/blabouncer.c
index 5fa2e5d..fe8cd1e 100644
--- a/blabouncer.c
+++ b/blabouncer.c
@@ -17,6 +17,7 @@
 #include <sys/select.h>
 #include <time.h>
 #include <sys/stat.h>
+#include <limits.h>
 #include <openssl/ssl.h>
 #include <openssl/err.h>
 #include <openssl/bio.h>
@@ -52,9 +53,11 @@
 #define MAXPORTLEN 6 // Up to 65535, so 5 characters + 1 for null
 #define MAXAUTOCHANLEN 1024 // Randomly picked maximum length of the auto channel list
 #define SERVERTIMEOUT 300 // How many seconds to wait without hearing from the server before assuming a timeout
+#define DEBUGFILESKEEP 5 // How many debug files to keep around
 
 // Global debug control
 int debug = 0;
+char debugpath[PATH_MAX];
 
 struct channel {
   char name[MAXCHANLENGTH];
@@ -2548,6 +2551,10 @@ int main(int argc, char *argv[]) {
 
   // Is debugging enabled?
   debug = getconfint("debug", settings.conffile);
+  if (!snprintf(debugpath, PATH_MAX, "%s/debug.txt", settings.basedir)) {
+    fprintf(stderr, "Error while preparing debug path location!\n");
+    exit(1);
+  }
 
   // Make sure the base directory exists
   struct stat st = {0};
@@ -2566,12 +2573,68 @@ int main(int argc, char *argv[]) {
   // Is replay logging enabled?
   settings.replaylogging = getconfint("replaylogging", settings.conffile);
 
+  // Prepare the debug file
+  // (Keep DEBUGFILESKEEP number of debug files around for past debugging)
+  if (DEBUGFILESKEEP > 0) {
+    // Check each possible debug file and rename it to one higher
+    char tmppath[PATH_MAX];
+    char tmppathnew[PATH_MAX];
+    // Delete or rename numbered debug files first
+    for (int i = DEBUGFILESKEEP; i > 0; i--) {
+      if (!snprintf(tmppath, PATH_MAX - 1, "%s.%d", debugpath, i)) {
+        fprintf(stderr, "Error while preparing to check old debug files!\n");
+        exit(1);
+      }
+      if (!access(tmppath, F_OK)) {
+        if (i == DEBUGFILESKEEP) {
+          if (remove(tmppath)) {
+            printf("error deleting old debug file '%s'.\n", tmppath);
+            exit(1);
+          }
+        } else {
+          if (!snprintf(tmppathnew, PATH_MAX - 1, "%s.%d", debugpath, i + 1)) {
+            fprintf(stderr, "Error while preparing to rename old debug file!\n");
+            exit(1);
+          }
+          if (rename(tmppath, tmppathnew)) {
+            printf("error renaming old debug file '%s' to '%s'.\n", tmppath, tmppathnew);
+            exit(1);
+          }
+        }
+      }
+    }
+    // Rename the previous debug file next
+    if (!access(debugpath, F_OK)) {
+      if (rename(debugpath, tmppath)) {
+        printf("error renaming old debug file '%s' to '%s'.\n", debugpath, tmppath);
+        exit(1);
+      }
+    }
+  }
+
+  // Write a friendly debug message to file (even if debug to file is disabled)
+  // Prepare a friendly time string
+  time_t rawtime;
+  struct tm * timeinfo;
+  time(&rawtime);
+  timeinfo = localtime(&rawtime);
+  // Strip the trailing newline
+  char timestr[MAXCHAR];
+  snprintf(timestr, MAXCHAR, "%s", asctime(timeinfo));
+  timestr[strlen(timestr) - 1] = '\0';
+  // Note the old debug setting
+  int debugold = debug;
+  // Temporarily enable debugging to file
+  debug = 1;
+  // Print it
+  debugprint("blabouncer started at %s, debugging is set to %d.\n", timestr, debugold);
+  // Set debugging back to whatever it was
+  debug = debugold;
+
   // TODO: see if any of this can be shared (i.e. 1. avoid code duplication, and 2. see if variables can be shared between client/server sockets)
 
   // I will try to keep to the notation of "server" meaning the real IRCd, "bouncer" meaning the bouncer, and "client" meaning the real IRC client
 
-  // BOUNCER-TO-SERVER socket things
-
   // Create server socket
   int serversockfd = createserversocket(settings.ircserver, settings.ircserverport);