fixing the exec function that weirdly was empty

src/exec.c

@@ -1,20 +1,53 @@
 #include <stdio.h>
 #include <stdlib.h>
+#include <malloc.h>
+#include <limits.h>
 
 #include "../cutils.h"
 
-char* exec(const char* cmd) 
-{
-  // Open the command for reading
+// Function to execute a command and capture its output
+char* exec(const char* cmd) {
+
+  // Open the command for reading and capture its output
   FILE* fp = popen(cmd, "r");
+
+  // Check if the command execution failed
   if (fp == NULL) {
+    // Print an error message if execution fails
     printf("Failed to run command");
-    exit(1);
-  } 
-  char* result = calloc(1024,sizeof(char));
+    exit(1);  // Exit the program with an error code
+  }
+  // Read the output a line at a time and store it
+  char line[PATH_MAX];
+
+  // Initialize a result buffer to store the command's output
+  char* result = (char*)calloc(2048, sizeof(char));
+
+  // Read the output from the command and append it to the result buffer
+  while (fgets(line, sizeof(line), fp) != NULL) {
+    printf("%s\n", line);
+    // Calculate the current size of the result buffer
+    size_t result_size = malloc_usable_size(result) / sizeof(char);
+
+    // Calculate the current length of the result
+    size_t result_len = strlen(result);
 
-
-  // Close
+    // Calculate the length of the current line of output
+    size_t path_len = strlen(line);
+
+    // Check if the result buffer needs to be resized to accommodate the output
+    if (result_len + path_len + 1 > result_size) {
+      // Resize the result buffer to ensure it can hold the entire output
+      result = (char*)realloc(result, result_len + path_len + 1);
+    }
+
+    // Append the current line of output to the result
+    strcat(result, line);
+  }
+
+  // Close the command execution
   pclose(fp);
+
+  // Return the captured output
   return result;
 }