Port over the last of the tinylogin applets

 -Erik

1 files changed, 81 insertions, 0 deletions

diff --git a/libbb/run_shell.c b/libbb/run_shell.c
new file mode 100644
index 000000000..30050fecb
--- /dev/null
+++ b/libbb/run_shell.c
@@ -0,0 +1,81 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Copyright 1989 - 1991, Julianne Frances Haugh <jockgrrl@austin.rr.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Julianne F. Haugh nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <errno.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <syslog.h>
+#include <ctype.h>
+#include "libbb.h"
+
+
+/* Run SHELL, or DEFAULT_SHELL if SHELL is empty.
+   If COMMAND is nonzero, pass it to the shell with the -c option.
+   If ADDITIONAL_ARGS is nonzero, pass it to the shell as more
+   arguments.  */
+
+void run_shell ( const char *shell, int loginshell, const char *command, const char **additional_args )
+{
+	const char **args;
+	int argno = 1;
+	int additional_args_cnt = 0;
+	
+	for ( args = additional_args; args && *args; args++ )
+		additional_args_cnt++;
+
+	if ( additional_args )
+		args = (const char **) xmalloc (sizeof (char *) * ( 4  + additional_args_cnt ));
+	else
+		args = (const char **) xmalloc (sizeof (char *) * 4 );
+		
+	args [0] = get_last_path_component ( xstrdup ( shell ));
+	
+	if ( loginshell ) {
+		char *args0 = xmalloc ( xstrlen ( args [0] ) + 2 );
+		args0 [0] = '-';
+		strcpy ( args0 + 1, args [0] );
+		args [0] = args0;
+	}
+    
+	if ( command ) {
+		args [argno++] = "-c";
+		args [argno++] = command;
+	}
+	if ( additional_args ) {
+		for ( ; *additional_args; ++additional_args )
+			args [argno++] = *additional_args;
+	}
+	args [argno] = 0;
+	execv ( shell, (char **) args );
+	perror_msg_and_die ( "cannot run %s", shell );
+}
+