added errors, removed util.c, and sperated install and build in make

Makefile

@@ -24,7 +24,9 @@ SUBDIRECTORIES =
 
 # -- Make Recipes --
 # DO NOT TOUCH BELOW UNLESS YOU KNOW WHAT YOU ARE DOING :)
-all: $(NAME)
+all: $(BUILD_DIR)/$(NAME)
+
+install: $(NAME)
 
 re: fclean all
 

srcs/main.c

@@ -147,7 +147,7 @@ int main(int argc, char** argv) {
     int timeout = 3000;
     struct timespec recvt;
     struct addrinfo hints = {0};
-    struct addrinfo *res = NULL;
+    struct addrinfo* res = NULL;
     struct pollfd fds[1];
     double min = INT32_MAX;
     double max = 0;
@@ -182,10 +182,20 @@ int main(int argc, char** argv) {
         inet_ntop(res->ai_family, &destination.sin_addr, ip_str, INET_ADDRSTRLEN);
     }
 
-    sock = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
+    struct protoent *proto = getprotobyname("icmp");
+    if (!proto) {
+        dprintf (STDERR_FILENO, "%s: unknown protocol icmp.\n", argv[0]);
+        exit(1);
+    }
+
+    sock = socket(AF_INET, SOCK_RAW, proto->p_proto);
 
     if (sock < 0) {
-        dprintf(STDERR_FILENO, "%s: socket() failed: %s\n", argv[0], strerror(errno));
+        if (errno == EPERM || errno == EACCES || errno == EPROTONOSUPPORT) {
+            dprintf(STDERR_FILENO, "%s: Lacking privilege for icmp socket.\n", argv[0]);
+        } else {
+            dprintf(STDERR_FILENO, "%s: %s\n", argv[0], strerror(errno));
+        }
         exit(1);
     }
 
@@ -268,10 +278,9 @@ int main(int argc, char** argv) {
             }
         } else if (ret == 0) {
             printf("No reply received within the timeout period\n");
+        } else {
+            perror("Poll failed");
         }
-        // else {
-        // perror("Poll failed");
-        // }
 
         pause();
     }
@@ -281,7 +290,13 @@ int main(int argc, char** argv) {
     if (rept) {
         printf("+%zu duplicates, ", rept);
     }
-    printf("%zu%% packet loss\n", (xmit - recvd) / xmit * 100);
+    if (xmit) {
+        if (recvd > xmit) {
+            printf("-- somebody is printing forged packets!\n");
+        } else {
+            printf("%zu%% packet loss\n", (xmit - recvd) / xmit * 100);
+        }
+    }
     double total = recvd + rept;
     avg /= total;
     stddev = stddev / total - avg * avg;

srcs/util.c

@@ -1,5 +0,0 @@
-//
-// Created by jrathelo on 2/24/25.
-//
-
-#include <main.h>