From cd7001f7055c3fc2d6298ab9e3befe91e951c652 Mon Sep 17 00:00:00 2001
From: Denis Vlasenko <vda.linux@googlemail.com>
Date: Mon, 9 Apr 2007 21:32:30 +0000
Subject: factor out NOFORK/NOEXEC code from find. Use it for xargs too.
---
libbb/vfork_daemon_rexec.c | 42 +++++++++++++++++++++++++++++++++++++++---
1 file changed, 39 insertions(+), 3 deletions(-)
(limited to 'libbb')
diff --git a/libbb/vfork_daemon_rexec.c b/libbb/vfork_daemon_rexec.c
index ff2b0bceb..d25693917 100644
--- a/libbb/vfork_daemon_rexec.c
+++ b/libbb/vfork_daemon_rexec.c
@@ -16,7 +16,7 @@
*/
#include <paths.h>
-#include "libbb.h"
+#include "busybox.h" /* for struct BB_applet */
/* This does a fork/exec in one call, using vfork(). Returns PID of new child,
* -1 for failure. Runs argv[0], searching path if that has no / in it. */
@@ -72,7 +72,8 @@ int wait4pid(int pid)
int status;
if (pid <= 0) {
- /*errno = ECHILD; -- wrong. we expect errno to be set from failed exec */
+ /*errno = ECHILD; -- wrong. */
+ /* we expect errno to be already set from failed [v]fork/exec */
return -1;
}
if (waitpid(pid, &status, 0) == -1)
@@ -80,7 +81,7 @@ int wait4pid(int pid)
if (WIFEXITED(status))
return WEXITSTATUS(status);
if (WIFSIGNALED(status))
- return WTERMSIG(status) + 10000;
+ return WTERMSIG(status) + 1000;
return 0;
}
@@ -99,6 +100,41 @@ int wait_pid(int *wstat, int pid)
return r;
}
+int spawn_and_wait(char **argv)
+{
+ int rc;
+
+ if (ENABLE_FEATURE_EXEC_PREFER_APPLETS) {
+ const struct BB_applet *a = find_applet_by_name(argv[0]);
+ if (a && (a->nofork
+#ifndef BB_NOMMU
+ || a->noexec /* NOEXEC cannot be used on NOMMU */
+#endif
+ )) {
+ int argc = 1;
+ char **pp = argv;
+ while (*++pp)
+ argc++;
+#ifdef BB_NOMMU
+ return a->main(argc, argv);
+#else
+ if (a->nofork)
+ return a->main(argc, argv);
+ /* a->noexec is true */
+ rc = fork();
+ if (rc)
+ goto w;
+ /* child */
+ current_applet = a;
+ run_current_applet_and_exit(argc, argv);
+#endif
+ }
+ }
+ rc = spawn(argv);
+ w:
+ return wait4pid(rc);
+}
+
#if 0 //ndef BB_NOMMU
// Die with an error message if we can't daemonize.
void xdaemon(int nochdir, int noclose)
--
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