1 files changed, 27 insertions, 0 deletions

diff --git a/libblkid/exec_shell.c b/libblkid/exec_shell.c
new file mode 100644
index 000000000..95620cd4d
--- /dev/null
+++ b/libblkid/exec_shell.c
@@ -0,0 +1,27 @@
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+
+#include "nls.h"
+#include "c.h"
+#include "xalloc.h"
+
+#include "exec_shell.h"
+
+#define DEFAULT_SHELL "/bin/sh"
+
+void __attribute__((__noreturn__)) exec_shell(void) {
+	const char *shell = getenv("SHELL"), *shell_basename;
+	char *arg0;
+	if (!shell)
+		shell = DEFAULT_SHELL;
+
+	shell_basename = basename(shell);
+	arg0 = xmalloc(strlen(shell_basename) + 2);
+	arg0[0] = '-';
+	strcpy(arg0 + 1, shell_basename);
+
+	execl(shell, arg0, NULL);
+	err(EXIT_FAILURE, _("failed to execute %s"), shell);
+}