1 files changed, 82 insertions, 1 deletions
diff --git a/src/pwd/getpwuid.c b/src/pwd/getpwuid.c
index dd1236ff..fd9ce1a2 100644
--- a/src/pwd/getpwuid.c
+++ b/src/pwd/getpwuid.c
@@ -1,10 +1,91 @@
 #include "sys/types.h"
 #include <pwd.h>
 #include "stddef.h"
+#include "stdio.h"
+#include "limits.h"
+#include "string.h"
+#include "_config.h"
+
+#ifndef LINE_MAX
+#define LINE_MAX _POSIX2_LINE_MAX
+#endif
 
 struct passwd * getpwuid(uid_t uid)
 {
-	(void)uid;
+	static char buf[LINE_MAX + 1];
+	static struct passwd pwd = { 0 };
+	char *user, *password, *pwuid, *gid, *gecos, *home, *shell, *nl;
+
+	/* TODO: attempt calling first _PWD_CMD */
+
+	FILE *db = fopen(_PWD_DB, "r");
+	if (db == NULL) {
+		return NULL;
+	}
+
+	while (fgets(buf, sizeof(buf), db) != NULL) {
+		user = buf;
+		if ((password = strchr(buf, ':')) != NULL) {
+			*password = '\0';
+			password++;
+		} else {
+			continue;
+		}
+
+		if ((pwuid = strchr(password, ':')) != NULL) {
+			*pwuid = '\0';
+			pwuid++;
+		} else {
+			continue;
+		}
+
+		if ((gid = strchr(pwuid, ':')) != NULL) {
+			*gid = '\0';
+			gid++;
+		} else {
+			continue;
+		}
+
+		if ((gecos = strchr(gid, ':')) != NULL) {
+			*gecos = '\0';
+			gecos++;
+		} else {
+			continue;
+		}
+
+		if ((home = strchr(gecos, ':')) != NULL) {
+			*home = '\0';
+			home++;
+		} else {
+			continue;
+		}
+
+		if ((shell = strchr(home, ':')) != NULL) {
+			*shell = '\0';
+			shell++;
+			if ((nl = strchr(shell, '\n')) != NULL) {
+				*nl = '\0';
+			}
+		} else {
+			continue;
+		}
+
+		pwd.pw_name = user;
+		pwd.pw_uid = strtoul(pwuid, NULL, 10);
+		pwd.pw_gid = strtoul(gid, NULL, 10);
+		pwd.pw_dir = home;
+		pwd.pw_shell = shell;
+		if (pwd.pw_uid == uid) {
+			break;
+		}
+	}
+
+	fclose(db);
+
+	if (pwd.pw_uid == uid) {
+		return &pwd;
+	}
+
 	return NULL;
 }