Fix memory leaks

main.c

@@ -237,6 +237,12 @@ int run_pipes(State *state, int num_args, char *args []) {
     } while ((piece = (char *)strtok(NULL, "|")) != 0);
 
     if (num_commands == 1) {
+        for (int i = 0; i < num_commands; i++) {
+            free(sep_commands[i]);
+        } 
+        free(sep_commands);
+        free(joined);
+        // free everything
         return ER_NOT_EXISTS;
     }
 
@@ -288,81 +294,6 @@ int run_pipes(State *state, int num_args, char *args []) {
     return ER_SUCCESS;
 }
 
-int check_pipes(State* state, int num_args, char* args[]) {
-    int debug = 1;
-
-    int left = 0;
-    int num_commands = 0;
-    int space = 10;
-    // an array of string-arrays which end in NULL
-    char** *pipes = calloc(space, sizeof(char***)); 
-
-    for (int i = 0; i < num_args; i++) {
-        if (!strcmp(args[i], "|") || i == num_args - 1) {
-            int command_length = i - left + 1 + num_commands;
-            char **command = calloc(command_length, sizeof(char**));
-            // copy the command into the array
-            for (int k = 0; k < command_length - 1; k++) {
-                command[k] = args[left + k];
-            }
-            command[command_length - 1] = 0;
-
-            // grow the array if needed
-            if (num_commands == space - 2) {
-                pipes = calloc((space *= 2), sizeof(char***));
-            }
-
-            pipes[num_commands] = command;
-            num_commands++;
-
-            left = i + 1;
-        }
-    }
-
-    if (debug) {
-        printf("Running: \n");
-        for (int i = 0; i < num_commands; i++) {
-            printf("%s\n", pipes[i][0]);
-        }
-    }
-
-    fflush(stdout);
-
-
-    if (num_commands == 1) {
-        return ER_NOT_EXISTS;
-    }
-
-    int pipein[2];
-    int pipeout[2];
-    memset(pipein, 0, sizeof(int) * 2);
-    memset(pipeout, 0, sizeof(int) * 2);
-
-    pipe(pipein);
-    pipe(pipeout);
-    // 0 is read, 1 is write
-
-    pid_t child;
-
-    int in;
-    int out;
-
-    in = 0;
-    out = pipeout[1];
-
-    for (int i = 0; i < num_commands; i++) {
-        execute(in, out, pipes[i], &child);
-        if (i != num_commands - 1) {
-            in = pipeout[0];
-            out = pipein[1];
-        } else {
-            out = 1; 
-            in = out - 1;
-        }
-    }
-
-    return ER_SUCCESS;
-}
 
 int check_builtins(State *state, int num_args, char *args[]) {
     char *builtins[NUM_BUILTINS] = {
@@ -539,8 +470,8 @@ int expand_command(State *state, int argc, char* argv[]) {
 int run_command(State *state, int argc, char *argv[]) {
     pid_t child;
     if (check_builtins(state, argc, argv) == ER_NOT_EXISTS) {
-        execute(0,1, argv, &child);
-        waitpid(child, NULL, 0);
+        if (!execute(0,1, argv, &child))
+            waitpid(child, NULL, 0);
     }
     return ER_SUCCESS;
 }
@@ -567,9 +498,13 @@ int repl(State* state, FILE *input) {
 
         split_string(&sep_string, &num_words, line, ' ');
 
-        if (num_words == 0)
+        if (num_words == 0) {
+            for (int i = 0; i <= num_words; i ++) 
+                free(sep_string[i]);
+            free(sep_string);
+            free(line);
             continue;
-
+        }
 //        int err = check_pipes(state, num_words, sep_string);
         int err = run_pipes(state, num_words, sep_string);
 
@@ -578,10 +513,9 @@ int repl(State* state, FILE *input) {
         }
 
 
-        for (int i = 0; i < num_words; i++) {
+        for (int i = 0; i <= num_words; i ++) {
             free(sep_string[i]);
         }
-
         free(sep_string);
         free(line);
     }
@@ -597,6 +531,7 @@ int startup(State *state, int argc, char **argv) {
 
     char *config_home;
     char *config = calloc(500, sizeof(char));
+
     if ((config_home = getenv("XDG_CONFIG_HOME"))) {
         strcpy(config, config_home);
         int len = strlen(config_home);
@@ -607,10 +542,10 @@ int startup(State *state, int argc, char **argv) {
         int len = strlen(config_home);
         strcpy(config + len, "/.chickenrc");
     }
-    printf("%s\n", config);
 
     int err;
     FILE* rc = fopen(config, "r");
+    free(config);
     if (rc) {
         state->interactive = false;
         state->input = rc;