Correcting tag name to be like previous ones1_3_0

1 files changed, 101 insertions, 0 deletions

diff --git a/libbb/run_shell.c b/libbb/run_shell.c
new file mode 100644
index 0000000..6be0908
--- /dev/null
+++ b/libbb/run_shell.c
@@ -0,0 +1,101 @@
+/* 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"
+#ifdef CONFIG_SELINUX
+#include <selinux/selinux.h>  /* for setexeccon  */
+#endif
+
+#ifdef CONFIG_SELINUX
+static security_context_t current_sid;
+
+void
+renew_current_security_context(void)
+{
+	if (current_sid)
+		freecon(current_sid);  /* Release old context  */
+	getcon(&current_sid);  /* update */
+}
+void
+set_current_security_context(security_context_t sid)
+{
+	if (current_sid)
+		freecon(current_sid);  /* Release old context  */
+	current_sid = sid;
+}
+
+#endif
+
+/* 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++;
+
+	args = xmalloc(sizeof(char*) * (4 + additional_args_cnt));
+
+	args[0] = bb_get_last_path_component(xstrdup(shell));
+
+	if (loginshell)
+		args[0] = xasprintf("-%s", args[0]);
+
+	if (command) {
+		args[argno++] = "-c";
+		args[argno++] = command;
+	}
+	if (additional_args) {
+		for (; *additional_args; ++additional_args)
+			args[argno++] = *additional_args;
+	}
+	args[argno] = NULL;
+#ifdef CONFIG_SELINUX
+	if (current_sid && !setexeccon(current_sid)) {
+		freecon(current_sid);
+		execve(shell, (char **) args, environ);
+	} else
+#endif
+	execv(shell, (char **) args);
+	bb_perror_msg_and_die("cannot run %s", shell);
+}