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-rw-r--r--libbb/vfork_daemon_rexec.c63
1 files changed, 57 insertions, 6 deletions
diff --git a/libbb/vfork_daemon_rexec.c b/libbb/vfork_daemon_rexec.c
index c8f9d27..2fd70ba 100644
--- a/libbb/vfork_daemon_rexec.c
+++ b/libbb/vfork_daemon_rexec.c
@@ -1,27 +1,78 @@
/*
* Rexec program for system have fork() as vfork() with foregound option
- * Copyright (C) Vladminr Oleynik and many different people.
+ *
+ * Copyright (C) Vladimir N. Oleynik <dzo@simtreas.ru>
+ * Copyright (C) 2003 Russ Dill <Russ.Dill@asu.edu>
+ *
+ * daemon() portion taken from uclibc:
+ *
+ * Copyright (c) 1991, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Modified for uClibc by Erik Andersen <andersee@debian.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <unistd.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <paths.h>
#include "libbb.h"
#if defined(__uClinux__)
-void vfork_daemon_rexec(int argc, char **argv, char *foreground_opt)
+void vfork_daemon_rexec(int nochdir, int noclose,
+ int argc, char **argv, char *foreground_opt)
{
+ int fd;
char **vfork_args;
int a = 0;
+
+ setsid();
+
+ if (!nochdir)
+ chdir("/");
+
+ if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) {
+ dup2(fd, STDIN_FILENO);
+ dup2(fd, STDOUT_FILENO);
+ dup2(fd, STDERR_FILENO);
+ if (fd > 2)
+ close(fd);
+ }
vfork_args = xcalloc(sizeof(char *), argc + 3);
+ vfork_args[a++] = "/bin/busybox";
while(*argv) {
vfork_args[a++] = *argv;
argv++;
}
vfork_args[a] = foreground_opt;
- execvp("/proc/self/exe", vfork_args);
- vfork_args[0] = "/bin/busybox";
- execv(vfork_args[0], vfork_args);
- bb_perror_msg_and_die("execv %s", vfork_args[0]);
+ switch (vfork()) {
+ case 0: /* child */
+ /* Make certain we are not a session leader, or else we
+ * might reacquire a controlling terminal */
+ if (vfork())
+ _exit(0);
+ execv(vfork_args[0], vfork_args);
+ bb_perror_msg_and_die("execv %s", vfork_args[0]);
+ case -1: /* error */
+ bb_perror_msg_and_die("vfork");
+ default: /* parent */
+ exit(0);
+ }
}
#endif /* uClinux */