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-rw-r--r--libc/unistd/usershell.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/libc/unistd/usershell.c b/libc/unistd/usershell.c
new file mode 100644
index 000000000..dcd95fb6d
--- /dev/null
+++ b/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;
+ }
+}
+