samples: posix: add sample for uname

Add a simple sample to print everything in the utsname struct.

Signed-off-by: Yong Cong Sin <ycsin@meta.com>

include/zephyr/posix/sys/utsname.h

@@ -6,23 +6,23 @@
 #ifndef ZEPHYR_INCLUDE_POSIX_SYS_UTSNAME_H_
 #define ZEPHYR_INCLUDE_POSIX_SYS_UTSNAME_H_
 
+#include "version.h"
 #include <errno.h>
-#include <zephyr/toolchain/common.h>
 #include <zephyr/net/hostname.h>
-#include "version.h"
+#include <zephyr/toolchain/common.h>
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 /* sysname */
-#define SYS_NAMELEN     sizeof("Zephyr")
+#define SYS_NAMELEN sizeof("Zephyr")
 
 /* nodename */
 #ifdef CONFIG_NET_HOSTNAME_ENABLE
-#define NODE_NAMELEN    NET_HOSTNAME_MAX_LEN
+#define NODE_NAMELEN NET_HOSTNAME_MAX_LEN
 #else
-#define NODE_NAMELEN    SYS_NAMELEN
+#define NODE_NAMELEN SYS_NAMELEN
 #endif
 
 /* release */

lib/posix/utsname.c

@@ -4,17 +4,18 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-#include <zephyr/posix/sys/utsname.h>
 #include <stdio.h>
 #include <string.h>
+#include <zephyr/posix/sys/utsname.h>
 
 int uname(struct utsname *name)
 {
 	strncpy(name->sysname, "Zephyr", sizeof(name->sysname));
 	strncpy(name->nodename, net_hostname_get(), sizeof(name->nodename));
 	strncpy(name->release, KERNEL_VERSION_STRING, sizeof(name->release));
 #if defined(__DATE__) && defined(__TIME__)
-	snprintf(name->version, sizeof(name->version), "%s %s %s", VERSION_BUILD, __DATE__, __TIME__);
+	snprintf(name->version, sizeof(name->version), "%s %s %s", VERSION_BUILD, __DATE__,
+		 __TIME__);
 #else
 	strncpy(name->version, VERSION_BUILD, sizeof(name->version));
 #endif

samples/posix/uname/CMakeLists.txt

@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.20.0)
+
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(posix_uname)
+
+target_sources(app PRIVATE src/main.c)

samples/posix/uname/prj.conf

@@ -0,0 +1 @@
+CONFIG_POSIX_API=y

samples/posix/uname/sample.yaml

@@ -0,0 +1,22 @@
+sample:
+  description: posix uname sample
+  name: posix uname
+common:
+  tags: posix
+  filter: not CONFIG_ARCH_POSIX
+  integration_platforms:
+    - native_posix_64
+    - qemu_riscv64
+  harness: console
+  harness_config:
+    type: multi_line
+    ordered: true
+    regex:
+      - "sysname\\[7\\]: Zephyr"
+      - "nodename\\[\\d+\\]: .*"
+      - "release\\[\\d+\\]: \\d+\\.\\d+\\.\\d+"
+      - "version\\[\\d+\\]: .*"
+      - "machine\\[\\d+\\]: .*"
+tests:
+  sample.posix.uname:
+    tags: uname

samples/posix/uname/src/main.c

@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2023 Meta
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/kernel.h>
+#include <sys/utsname.h>
+
+int main(void)
+{
+	struct utsname info;
+
+	uname(&info);
+
+	printk("\nPrinting everything in utsname...\n");
+	printk("sysname[%ld]: %s\n", sizeof(info.sysname), info.sysname);
+	printk("nodename[%ld]: %s\n", sizeof(info.nodename), info.nodename);
+	printk("release[%ld]: %s\n", sizeof(info.release), info.release);
+	printk("version[%ld]: %s\n", sizeof(info.version), info.version);
+	printk("machine[%ld]: %s\n", sizeof(info.machine), info.machine);
+
+	return 0;
+}
+
+
+	return 0;
+}