tee, whoami, wc

1 files changed, 24 insertions, 0 deletions

diff --git a/src/commands/whoami.c b/src/commands/whoami.c
new file mode 100644
index 0000000..efc9bcd
--- /dev/null
+++ b/src/commands/whoami.c
@@ -0,0 +1,24 @@
+#include "../command.h"
+
+#include <pwd.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+static void help() {
+    printf("Usage: whoami\n\n");
+    printf("Print the username associated with the current effective user id\n");
+    exit(EXIT_SUCCESS);
+}
+
+COMMAND(whoami) {
+    if (argc > 0 && streql("--help", argv[0])) help();
+
+    uid_t usr = getuid();
+    struct passwd* passwd = getpwuid(usr);
+    if (passwd == NULL) {
+        printf("\x1b[1;91myou do not exist.\n");
+    } else {
+        printf("%s\n", passwd->pw_name);
+    }
+    return EXIT_SUCCESS;
+}