Implement arrays in the configuration file and start using them to allow for multiple connect commands.

1 files changed, 177 insertions, 4 deletions

diff --git a/config.c b/config.c
index cea404c..842f389 100644
--- a/config.c
+++ b/config.c
@@ -25,7 +25,7 @@ int getconfstr(char *confname, char *filename, char* dest) {
   char str[MAXCHAR];
   int found = 0; // Have we found the configuration option?
 
-  // Set strings to zero-length to begin
+  // Set string to zero-length to begin
   dest[0] = '\0';
 
   // Length of requested configuration option name
@@ -105,6 +105,165 @@ int getconfstr(char *confname, char *filename, char* dest) {
   return 1;
 }
 
+// Populates 'dest' with the values of the configuration array option
+// with name 'confname' from configuration file 'filename'.
+// Returns 1 on success, 0 on reading no values, or -1 on an error.
+// On error, dest[0] is set to the error string for later retrieval.
+int getconfarr(char *confname, char *filename, char dest[MAXCONFARR][MAXDATASIZE]) {
+  debugprint(DEBUG_FULL, "getconfarr(): '%s', '%s' and a dest array.\n", confname, filename);
+
+  FILE *fp;
+  char line[MAXCHAR];
+  int found = 0; // Have we found the configuration option?
+  int valuecount = 0; // Which element in the configuration array we are on
+
+  // Set strings to zero-length to begin
+  for (int i = 0; i < MAXCONFARR; i++) {
+    dest[i][0] = '\0';
+  }
+
+  // Length of requested configuration array name
+  long int namelen = strlen(confname);
+
+  fp = fopen(filename, "r");
+
+  if (fp == NULL) {
+    debugprint(DEBUG_CRIT, "error: could not open configuration file '%s'.\n", filename);
+    exit(1);
+  }
+  // Loop through the whole file, looking for the requested configuration array
+  while (fgets(line, MAXCHAR, fp) != NULL) {
+    // Don't bother with any of this if this line is a comment
+    int comment = 0;
+    for (size_t i = 0; i < strlen(line); i++) {
+      // Ignore spaces/tabs
+      if (line[i] == ' ' || line[i] == '\t') {
+        continue;
+      } else if (line[i] == '#') {
+        // If it's a comment, ignore the line
+        comment = 1;
+        break;
+      } else {
+        // Found something else before a comment, so carry on
+        break;
+      }
+    }
+
+    if (comment) {
+      continue;
+    }
+
+    // If we haven't found our array yet, try to find the opening line
+    if (!found) {
+      char substr[MAXCHAR];
+
+      // Check if the next character after the length of the requested array
+      // name is an equals sign, a space, or a tab
+      if (line[namelen] != '=' && line[namelen] != ' ' && line[namelen] != '\t') {
+        // If it isn't this can't have been our array
+        continue;
+      }
+
+      // Copy the number of characters that the requested array name is long
+      // to a temporary string
+      strncpy(substr, line, namelen);
+      substr[namelen] = '\0';
+
+      // If the resulting temporary string contains the requested array name,
+      // we have found our configuration array
+      if (strstr(substr, confname)) {
+        // Make sure it is a valid start of array line
+        for (size_t i = namelen; i < strlen(line); i++) {
+          if (line[i] == ' ' || line[i] == '\t' || line[i] == '=') {
+            // Ignore spaces, tabs and equals signs
+            continue;
+          } else if (line[i] == '{') {
+            // Success, found an opening brace
+            // Ignore anything else on this line
+            found = 1;
+            break;
+          } else {
+            // Unexpected character found, return failure
+            snprintf(dest[0], MAXDATASIZE, "Unexpected character '%c' found on configuration array opening line for '%s'.\n", line[i], confname);
+            fclose(fp);
+            return -1;
+          }
+        }
+      }
+    // If we have found our array, extract the value from each line in it
+    } else {
+      int valuelen = 0;
+      int inquotes = 0;
+      for (size_t i = 0; i < strlen(line); i++) {
+        // If we've on the closing brace line, then we're done
+        if (line[i] == '}') {
+          for (int i = 0; i < valuecount; i++) {
+            debugprint(DEBUG_FULL, "getconfstr(): returning '%s'.\n", dest[i]);
+          }
+
+          // Close fine and return success (or 0 if no values found in an otherwise valid array)
+          fclose(fp);
+          if (valuecount) {
+            return 1;
+          } else {
+            return 0;
+          }
+        }
+
+        // If not in the quotes yet
+        if (!inquotes) {
+          // Skip over initial spaces and tabs
+          if (line[i] == ' ' || line[i] == '\t') {
+            continue;
+          } else if (line[i] == '"') {
+            // Quotes found, we're now reading the value
+            inquotes = 1;
+            continue;
+          } else {
+            // Unexpected character found, return failure
+            snprintf(dest[0], MAXDATASIZE, "Unexpected character '%c' found before opening quotes on array line for '%s'.\n", line[i], confname);
+            fclose(fp);
+            return -1;
+          }
+          // If inside the quotes (so, we've got to the actual value)
+        } else if (inquotes) {
+          // If we're on the last character and it isn't a closing quote, something is wrong
+          if (i == strlen(line) - 1 && line[i] != '"') {
+            snprintf(dest[0], MAXDATASIZE, "Reached end of line without finding closing quotes on array line for '%s'.\n", confname);
+            fclose(fp);
+            return -1;
+          }
+
+          // If we've found too many values, return an error
+          if (valuecount > MAXCONFARR) {
+            snprintf(dest[0], MAXDATASIZE, "Too many elements defined for configuration array '%s', maximum number is '%d'.\n", confname, MAXCONFARR);
+            fclose(fp);
+            return -1;
+          }
+
+          // Otherwise, copy everything that isn't the closing quotes to the current element in the dest array
+          if (line[i] != '"') {
+            dest[valuecount][valuelen] = line[i];
+            valuelen++;
+            continue;
+          } else {
+            // When we find the closing quotes, the value is read, so terminate the dest array element string
+            dest[valuecount][valuelen] = '\0';
+            // We're done with this value, ignore anything that may be after the closing quotes on this line
+            valuecount++;
+            break;
+          }
+        }
+      }
+    }
+  }
+
+  // If we get this far, then something went wrong
+  snprintf(dest[0], MAXDATASIZE, "getconfarr(): didn't find any configuration array for '%s'.\n", confname);
+  fclose(fp);
+  return 0;
+}
+
 // Returns the value of the configuration option with name
 // 'confname' from configuration file 'filename'.
 // Sets errno to 0 on success, or ECONFINT if it fails, in which case the return value is undefined.
@@ -153,11 +312,22 @@ int createconfigfile(char *filename) {
   char *string =
   "# blabouncer configuration file\n"
   "#\n"
-  "# Entries must be in the form:\n"
+  "# Normal 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"
+  "# Array entries must be in the form:\n"
+  "# option name, space, equals sign, space, open brace\n"
+  "# (optional indentation,) double quote, element value, double quoute\n"
+  "# (optional multiple values to be repeated after the first one(s))\n"
+  "# close brace\n"
+  "# e.g.\n"
+  "# connectcommands = {\n"
+  "#   \"PRIVMSG NickServ IDENTIFY bananas\"\n"
+  "#   \"PRIVMSG myfriend I'm online!\"\n"
+  "# }\n"
+  "#\n"
   "# Shell expansion is not supported, so do not try and specify e.g.\n"
   "# \"~/.blabouncer/\" or \"$HOME/.blabouncer/\", instead use \"/home/foo/.blabouncer\"\n"
   "#\n"
@@ -210,8 +380,11 @@ int createconfigfile(char *filename) {
   "# Real IRC server password\n"
   "#ircserverpassword = \"apples\"\n"
   "\n"
-  "# Command to send to the server upon completing registration (e.g. a NickServ password)\n"
-  "#connectcommand \"PRIVMSG NickServ IDENTIFY bananas\"\n"
+  "# Command(s) to send to the server upon completing registration (e.g. a NickServ password)\n"
+  "#connectcommands = {\n"
+  "#  \"PRIVMSG NickServ IDENTIFY bananas\"\n"
+  "#  \"PRIVMSG myfriend I'm online!\"\n"
+  "#}\n"
   "\n"
   "# Base directory (defaults to $HOME/.blabouncer/)\n"
   "# Things such as the logs directory will be placed below this\n"