From e9092ab2355222f58b5f936bca1f52aa25c4dfb8 Mon Sep 17 00:00:00 2001
From: apio <blobs.trading@gmail.com>
Date: Fri, 28 Oct 2022 21:57:07 +0200
Subject: [PATCH] sh: Display username instead of shell's PID in prompt

---
 apps/src/sh.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/apps/src/sh.c b/apps/src/sh.c
index e212b29c..18f5198c 100644
--- a/apps/src/sh.c
+++ b/apps/src/sh.c
@@ -1,6 +1,7 @@
 #include <assert.h>
 #include <errno.h>
 #include <luna.h>
+#include <pwd.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -8,6 +9,7 @@
 #include <unistd.h>
 
 static int status = 0;
+static char* username = NULL;
 
 typedef struct
 {
@@ -76,9 +78,19 @@ void shell_execvp(char* pathname, char* const argv[])
 
 void show_prompt()
 {
-    if (WEXITSTATUS(status)) { printf("%d [%ld]> ", WEXITSTATUS(status), getpid()); }
+    if (!username)
+    {
+        struct passwd* user = getpwuid(getuid());
+        if (!user)
+        {
+            if (errno) perror("getpwuid");
+            username = "??";
+        }
+        else { username = user->pw_name; }
+    }
+    if (WEXITSTATUS(status)) { printf("%d [%s]> ", WEXITSTATUS(status), username); }
     else
-        printf("[%ld]> ", getpid());
+        printf("[%s]> ", username);
 }
 
 int command_matches(command* cmd, const char* string)