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Diffstat (limited to 'libbb/run_shell.c')
-rw-r--r--libbb/run_shell.c18
1 files changed, 10 insertions, 8 deletions
diff --git a/libbb/run_shell.c b/libbb/run_shell.c
index 4608a24..4d92c3c 100644
--- a/libbb/run_shell.c
+++ b/libbb/run_shell.c
@@ -49,15 +49,14 @@ void FAST_FUNC set_current_security_context(security_context_t 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. */
-
+/* Run SHELL, or DEFAULT_SHELL if SHELL is "" or NULL.
+ * 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 FAST_FUNC run_shell(const char *shell, int loginshell, const char *command, const char **additional_args)
{
const char **args;
- int argno = 1;
+ int argno;
int additional_args_cnt = 0;
for (args = additional_args; args && *args; args++)
@@ -65,11 +64,13 @@ void FAST_FUNC run_shell(const char *shell, int loginshell, const char *command,
args = xmalloc(sizeof(char*) * (4 + additional_args_cnt));
- args[0] = bb_get_last_path_component_nostrip(xstrdup(shell));
+ if (!shell || !shell[0])
+ shell = DEFAULT_SHELL;
+ args[0] = bb_get_last_path_component_nostrip(shell);
if (loginshell)
args[0] = xasprintf("-%s", args[0]);
-
+ argno = 1;
if (command) {
args[argno++] = "-c";
args[argno++] = command;
@@ -79,6 +80,7 @@ void FAST_FUNC run_shell(const char *shell, int loginshell, const char *command,
args[argno++] = *additional_args;
}
args[argno] = NULL;
+
#if ENABLE_SELINUX
if (current_sid)
setexeccon(current_sid);