X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=libbb%2Frun_shell.c;h=6be09088d76d5308fbbc337b81b672e57d4db25b;hb=ab24e18c7a32ee1637be19f239e9dd9d7c7f6534;hp=d154b9852121b4b7eeb4ed6c4a3beb8ba1fa6533;hpb=cad5364599eb5062d59e0c397ed638ddd61a8d5d;p=oweals%2Fbusybox.git

diff --git a/libbb/run_shell.c b/libbb/run_shell.c
index d154b9852..6be09088d 100644
--- a/libbb/run_shell.c
+++ b/libbb/run_shell.c
@@ -36,45 +36,66 @@
 #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 )
+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++ )
+
+	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] = bb_get_last_path_component ( bb_xstrdup ( shell ));
-	
-	if ( loginshell ) {
-		char *args0;
-		bb_xasprintf ( &args0, "-%s", args [0] );
-		args [0] = args0;
-	}
-    
-	if ( command ) {
-		args [argno++] = "-c";
-		args [argno++] = command;
+	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;
+	if (additional_args) {
+		for (; *additional_args; ++additional_args)
+			args[argno++] = *additional_args;
 	}
-	args [argno] = 0;
-	execv ( shell, (char **) args );
-	bb_perror_msg_and_die ( "cannot run %s", shell );
+	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);
 }
-