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authorDenis Vlasenko <vda.linux@googlemail.com>2008-04-01 17:43:03 +0000
committerDenis Vlasenko <vda.linux@googlemail.com>2008-04-01 17:43:03 +0000
commit0edbdd8ac8c0add7902d73a7ef921abba9f5752a (patch)
tree364657f4a4613a7cdaab1e7b43e058f75a73b45e /libbb
parentc59d802a5aa70c0c8f1f9fb8478351c6cbc3f86d (diff)
downloadbusybox-0edbdd8ac8c0add7902d73a7ef921abba9f5752a.tar.gz
xfunc_die: resurrect (actually, it's "svn add" being forgotten again)
Diffstat (limited to 'libbb')
-rw-r--r--libbb/xfunc_die.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/libbb/xfunc_die.c b/libbb/xfunc_die.c
new file mode 100644
index 000000000..357494d34
--- /dev/null
+++ b/libbb/xfunc_die.c
@@ -0,0 +1,40 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Utility routines.
+ *
+ * Copyright (C) 2008 by Denys Vlasenko <vda.linux@googlemail.com>
+ *
+ * Licensed under GPLv2, see file LICENSE in this tarball for details.
+ */
+
+/* Keeping it separate allows to NOT suck in stdio for VERY small applets.
+ * Try building busybox with only "true" enabled... */
+
+#include "libbb.h"
+
+int die_sleep;
+#if ENABLE_FEATURE_PREFER_APPLETS || ENABLE_HUSH
+jmp_buf die_jmp;
+#endif
+
+void xfunc_die(void)
+{
+ if (die_sleep) {
+ if ((ENABLE_FEATURE_PREFER_APPLETS || ENABLE_HUSH)
+ && die_sleep < 0
+ ) {
+ /* Special case. We arrive here if NOFORK applet
+ * calls xfunc, which then decides to die.
+ * We don't die, but jump instead back to caller.
+ * NOFORK applets still cannot carelessly call xfuncs:
+ * p = xmalloc(10);
+ * q = xmalloc(10); // BUG! if this dies, we leak p!
+ */
+ /* -2222 means "zero" (longjmp can't pass 0)
+ * run_nofork_applet() catches -2222. */
+ longjmp(die_jmp, xfunc_error_retval ? xfunc_error_retval : -2222);
+ }
+ sleep(die_sleep);
+ }
+ exit(xfunc_error_retval);
+}