From ed1e4ddfa7d1dba8326421b27d16664feafa661e Mon Sep 17 00:00:00 2001
From: Xiang Xiao <xiaoxiang@xiaomi.com>
Date: Mon, 29 Nov 2021 12:46:00 +0800
Subject: [PATCH] libc: Add getprogname function

defined here:
https://www.freebsd.org/cgi/man.cgi?query=getprogname&sektion=3

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
---
 include/stdlib.h                   |  4 +++
 libs/libc/stdlib/Make.defs         |  2 +-
 libs/libc/stdlib/lib_getprogname.c | 44 ++++++++++++++++++++++++++++++
 3 files changed, 49 insertions(+), 1 deletion(-)
 create mode 100644 libs/libc/stdlib/lib_getprogname.c

diff --git a/include/stdlib.h b/include/stdlib.h
index d3454a05305..690ac4c13d6 100644
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -265,6 +265,10 @@ FAR void  *bsearch(FAR const void *key, FAR const void *base, size_t nel,
                    size_t width, CODE int (*compar)(FAR const void *,
                    FAR const void *));
 
+/* Current program name manipulation */
+
+FAR const char *getprogname(void);
+
 #undef EXTERN
 #if defined(__cplusplus)
 }
diff --git a/libs/libc/stdlib/Make.defs b/libs/libc/stdlib/Make.defs
index 018130ce6fe..4643d53682e 100644
--- a/libs/libc/stdlib/Make.defs
+++ b/libs/libc/stdlib/Make.defs
@@ -20,7 +20,7 @@
 
 # Add the stdlib C files to the build
 
-CSRCS += lib_abs.c lib_abort.c lib_atof.c lib_atoi.c
+CSRCS += lib_abs.c lib_abort.c lib_atof.c lib_atoi.c lib_getprogname.c
 CSRCS += lib_atol.c lib_atoll.c lib_div.c lib_ldiv.c lib_lldiv.c lib_Exit.c
 CSRCS += lib_itoa.c lib_labs.c lib_llabs.c lib_realpath.c lib_bsearch.c
 CSRCS += lib_rand.c lib_qsort.c lib_srand.c lib_strtol.c
diff --git a/libs/libc/stdlib/lib_getprogname.c b/libs/libc/stdlib/lib_getprogname.c
new file mode 100644
index 00000000000..a0a712151b2
--- /dev/null
+++ b/libs/libc/stdlib/lib_getprogname.c
@@ -0,0 +1,44 @@
+/****************************************************************************
+ * libs/libc/stdlib/lib_getprogname.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdlib.h>
+#include <nuttx/tls.h>
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: getprogname
+ ****************************************************************************/
+
+FAR const char *getprogname(void)
+{
+  FAR struct task_info_s *info;
+
+  info = task_get_info();
+  return info->argv[0];
+}