[Feature][ZXW-33]merge ZXW 0428 version
Change-Id: I11f167edfea428d9fab198ff00ff1364932d1b0b
diff --git a/ap/libc/glibc/glibc-2.23/posix/execl.c b/ap/libc/glibc/glibc-2.23/posix/execl.c
new file mode 100644
index 0000000..102d19d
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/posix/execl.c
@@ -0,0 +1,73 @@
+/* Copyright (C) 1991-2016 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <unistd.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <stackinfo.h>
+
+
+/* Execute PATH with all arguments after PATH until
+ a NULL pointer and environment from `environ'. */
+int
+execl (const char *path, const char *arg, ...)
+{
+#define INITIAL_ARGV_MAX 1024
+ size_t argv_max = INITIAL_ARGV_MAX;
+ const char *initial_argv[INITIAL_ARGV_MAX];
+ const char **argv = initial_argv;
+ va_list args;
+
+ argv[0] = arg;
+
+ va_start (args, arg);
+ unsigned int i = 0;
+ while (argv[i++] != NULL)
+ {
+ if (i == argv_max)
+ {
+ argv_max *= 2;
+ const char **nptr = realloc (argv == initial_argv ? NULL : argv,
+ argv_max * sizeof (const char *));
+ if (nptr == NULL)
+ {
+ if (argv != initial_argv)
+ free (argv);
+ va_end (args);
+ return -1;
+ }
+ if (argv == initial_argv)
+ /* We have to copy the already filled-in data ourselves. */
+ memcpy (nptr, argv, i * sizeof (const char *));
+
+ argv = nptr;
+ }
+
+ argv[i] = va_arg (args, const char *);
+ }
+ va_end (args);
+
+ int ret = __execve (path, (char *const *) argv, __environ);
+ if (argv != initial_argv)
+ free (argv);
+
+ return ret;
+}
+libc_hidden_def (execl)