From 670e38e25147b1630f1c7f22d43e2164dbea7484 Mon Sep 17 00:00:00 2001
From: g1n <g1n@ttm.sh>
Date: Fri, 12 Aug 2022 19:41:24 +0300
Subject: [PATCH] Add logname util

---
 src/logname.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 src/logname.c

diff --git a/src/logname.c b/src/logname.c
new file mode 100644
index 0000000..8601a42
--- /dev/null
+++ b/src/logname.c
@@ -0,0 +1,26 @@
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+
+int usage(char *argv0) {
+  printf("Usage: %s\n", argv0);
+  return 1;
+}
+
+int main(int argc, char *argv[]){
+  int opt;
+  while ((opt = getopt(argc, argv, ":")) != -1) {
+    switch (opt) {
+      case '?':
+        fprintf(stderr, "%s: invalid option -- '%c'\n", argv[0], optopt);
+        return usage(argv[0]);
+    }
+  }
+
+  if (getlogin() != NULL) {
+    printf("%s\n", getlogin());
+  } else {
+    perror(argv[0]);
+  }
+  return errno;
+}