Bigger patch for (partial) tinylogin integration

- Made a new dir loginutils
- Moved all applets from pwd_grp to loginutils
- Added new applets su.c login.c to loginutils
- Made a new dir libpwdgrp
- Moved everything from pwd_grp/libpwd_grp there
- Added shadow.c to libpwdgrp
- Removed dir pwd_grp
- Added usage strings for login and su to usage.h
- Changed main Makefile to reflect the dir rearrangements
[Parts of this patch may overlap with my other two patches]

1 files changed, 51 insertions, 0 deletions

diff --git a/libpwdgrp/getpwnam.c b/libpwdgrp/getpwnam.c
new file mode 100644
index 0000000..88a31f8
--- /dev/null
+++ b/libpwdgrp/getpwnam.c
@@ -0,0 +1,51 @@
+/*
+ * getpwnam.c - This file is part of the libc-8086/pwd package for ELKS,
+ * Copyright (C) 1995, 1996 Nat Friedman <ndf@linux.mit.edu>.
+ * 
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Library General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Library General Public
+ *  License along with this library; if not, write to the Free
+ *  Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include "busybox.h" 
+
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <fcntl.h>
+#include "pwd.h"
+
+
+struct passwd *getpwnam(const char *name)
+{
+	int passwd_fd;
+	struct passwd *passwd;
+
+	if (name == NULL) {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	if ((passwd_fd = open("/etc/passwd", O_RDONLY)) < 0)
+		return NULL;
+
+	while ((passwd = __getpwent(passwd_fd)) != NULL)
+		if (!strcmp(passwd->pw_name, name)) {
+			close(passwd_fd);
+			return passwd;
+		}
+
+	close(passwd_fd);
+	return NULL;
+}