Patch from Robert Griebl <griebl@gmx.de> to support

getusershell() and friends.

libc/unistd/usershell.c

@@ -0,0 +1,63 @@
+/* vi: set sw=4 ts=4: */
+/* getusershell and friends for uClibc
+ *
+ * Copyright (C) 2002 by Robert Griebl <griebl@gmx.de>
+ *
+ * This program 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 program 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 program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+
+/* Rely on the .bss to zero these */
+static FILE *fp;
+static int isopen;
+static char **cursh;
+static char *validsh [] = { "/bin/sh", "/bin/csh", 0 };
+
+void endusershell ( void )
+{
+	if ( fp && isopen )
+		fclose ( fp );
+	isopen = 0;
+}
+
+void setusershell ( void )
+{
+	if ( isopen )
+		endusershell ( );
+	fp = fopen ( "/etc/shells", "r" );
+	cursh = validsh;
+	isopen = 1;
+}
+
+char *getusershell ( void )
+{
+	char line [BUFSIZ];
+
+	if ( !isopen )
+		setusershell ( );
+
+	if ( fp ) {
+		return fgets ( line, sizeof( line ) - 1, fp );
+	} else {
+		char *result = *cursh;
+
+		if ( result )
+			cursh++;
+		return result;  
+	}
+}
+