[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/build/uClibc/libc/unistd/daemon.c b/ap/build/uClibc/libc/unistd/daemon.c
new file mode 100644
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+++ b/ap/build/uClibc/libc/unistd/daemon.c
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+/* vi: set sw=4 ts=4: */
+/* daemon implementation for uClibc
+ *
+ * Copyright (c) 1990, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
+ * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
+ *
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ * Modified for uClibc by Erik Andersen <andersen@uclibc.org>
+ */
+
+#include <stdio.h>
+#include <features.h>
+#include <fcntl.h>
+#include <paths.h>
+#include <signal.h>
+#include <unistd.h>
+#include <not-cancel.h>
+#include <errno.h>
+
+#ifdef __UCLIBC_HAS_THREADS_NATIVE__
+#include <sys/stat.h>
+#endif
+
+#ifdef __UCLIBC_HAS_LFS__
+#define STAT stat64
+#define FSTAT fstat64
+#else
+#define STAT stat
+#define FSTAT fstat
+#endif
+
+#if defined __USE_BSD || (defined __USE_XOPEN && !defined __USE_UNIX98)
+
+#ifndef __ARCH_USE_MMU__
+#include <sys/syscall.h>
+#include <sched.h>
+/* use clone() to get fork() like behavior here -- we just want to disassociate
+ * from the controlling terminal
+ */
+static inline attribute_optimize("O3")
+pid_t _fork_parent(void)
+{
+ INTERNAL_SYSCALL_DECL(err);
+ register long ret = INTERNAL_SYSCALL(clone, err, 2, CLONE_VM, 0);
+ if (ret > 0)
+ /* parent needs to die now w/out touching stack */
+ INTERNAL_SYSCALL(exit, err, 1, 0);
+ return ret;
+}
+static inline pid_t fork_parent(void)
+{
+ /* Block all signals to keep the parent from using the stack */
+ pid_t ret;
+ sigset_t new_set, old_set;
+ sigfillset(&new_set);
+ sigprocmask(SIG_BLOCK, &new_set, &old_set);
+ ret = _fork_parent();
+ sigprocmask(SIG_SETMASK, &old_set, NULL);
+ return ret;
+}
+#else
+static inline pid_t fork_parent(void)
+{
+ switch (fork()) {
+ case -1: return -1;
+ case 0: return 0;
+ default: _exit(0);
+ }
+}
+#endif
+
+int daemon(int nochdir, int noclose)
+{
+ int fd;
+
+ if (fork_parent() == -1)
+ return -1;
+
+ if (setsid() == -1)
+ return -1;
+
+ if (!nochdir)
+ chdir("/");
+
+ if (!noclose)
+ {
+ struct STAT st;
+
+ if ((fd = open_not_cancel(_PATH_DEVNULL, O_RDWR, 0)) != -1
+ && (__builtin_expect (FSTAT (fd, &st), 0) == 0))
+ {
+ if (__builtin_expect (S_ISCHR (st.st_mode), 1) != 0) {
+ dup2(fd, STDIN_FILENO);
+ dup2(fd, STDOUT_FILENO);
+ dup2(fd, STDERR_FILENO);
+ if (fd > 2)
+ close(fd);
+ } else {
+ /* We must set an errno value since no
+ function call actually failed. */
+ close_not_cancel_no_status (fd);
+ __set_errno (ENODEV);
+ return -1;
+ }
+ } else {
+ close_not_cancel_no_status (fd);
+ return -1;
+ }
+ }
+ return 0;
+}
+#endif