LibC+Ports: Implement stpncpy() and update dash to 0.5.13.5

Ports/AvailablePorts.md

@@ -49,7 +49,7 @@ This list is also available at [ports.serenityos.net](https://ports.serenityos.n
 | [`cowsay`](cowsay/)                             | cowsay                                                        | 3.04                   | https://github.com/tnalpgge/rank-amateur-cowsay                      |
 | [`cpio`](cpio/)                                 | GNU cpio archive utility                                      | 2.15                   | https://www.gnu.org/software/cpio/                                   |
 | [`curl`](curl/)                                 | curl                                                          | 8.22.0                 | https://curl.se/                                                     |
-| [`dash`](dash/)                                 | DASH                                                          | 0.5.10.2               | http://gondor.apana.org.au/~herbert/dash                             |
+| [`dash`](dash/)                                 | DASH                                                          | 0.5.13.5               | http://gondor.apana.org.au/~herbert/dash                             |
 | [`deutex`](deutex/)                             | DeuTex                                                        | 5.2.3                  | https://github.com/Doom-Utils/deutex                                 |
 | [`DevilutionX`](DevilutionX/)                   | DevilutionX                                                   | 1.5.5                  | https://github.com/diasurgical/DevilutionX                           |
 | [`dialog`](dialog/)                             | Dialog                                                        | 1.3-20260721           | https://invisible-island.net/dialog/                                 |

Ports/dash/package.sh

@@ -1,9 +1,9 @@
 #!/usr/bin/env -S bash ../.port_include.sh
-port=dash
-version=0.5.10.2
-useconfigure=true
+port='dash'
+version='0.5.13.5'
+useconfigure='true'
 files=(
-    "http://gondor.apana.org.au/~herbert/dash/files/dash-${version}.tar.gz#3c663919dc5c66ec991da14c7cf7e0be8ad00f3db73986a987c118862b5f6071"
+    "http://gondor.apana.org.au/~herbert/dash/files/dash-${version}.tar.gz#40090101a2a491f13e901d3d48e90414f26634628b9bfff35ff540363c227a7d"
 )
 
 configure() {

Ports/dash/patches/0001-Replace-a-use-of-wait3-with-waitpid-in-the-job-contr.patch

@@ -9,15 +9,15 @@ wait3() does not exist on serenity.
  1 file changed, 1 insertion(+), 1 deletion(-)
 
 diff --git a/src/jobs.c b/src/jobs.c
-index 606d603..92ac84d 100644
+index 914b383a953d1e24c72e713ffa67d58895ea26b0..3e2f63ad60025339cf66a65c20c8cf26562a50d8 100644
 --- a/src/jobs.c
 +++ b/src/jobs.c
-@@ -1147,7 +1147,7 @@ waitproc(int block, int *status)
-
- 	do {
- 		gotsigchld = 0;
--		err = wait3(status, flags, NULL);
-+		err = waitpid(-1, status, flags);
- 		if (err || !block)
- 			break;
+@@ -1208,7 +1208,7 @@ waitproc(int block, int *status)
+ #ifdef HAVE_WAIT3
+ 			err = wait3(status, flags, NULL);
+ #else
+-			err = waitpid((pid_t)-1, status, flags, NULL);
++			err = waitpid((pid_t)-1, status, flags);
+ #endif
+ 		while (err < 0 && errno == EINTR);
 

Ports/dash/patches/0002-Skip-building-helpers-by-default.patch

@@ -9,10 +9,10 @@ Subject: [PATCH] Skip building helpers by default
  2 files changed, 5 insertions(+)
 
 diff --git a/configure.ac b/configure.ac
-index 4829288..9f9a155 100644
+index a247d95cc63f4434f5af3dcf741abb61170578c9..f99ba6093cdc65d8a846aa3fc7eacd5bfe87d3bf 100644
 --- a/configure.ac
 +++ b/configure.ac
-@@ -181,5 +181,8 @@ AC_ARG_ENABLE(lineno, AS_HELP_STRING(--disable-lineno, \
+@@ -228,5 +228,8 @@ AC_ARG_ENABLE(lineno, AS_HELP_STRING(--disable-lineno, \
  if test "$enable_lineno" != "no"; then
  	AC_DEFINE([WITH_LINENO], 1, [Define if you build with -DWITH_LINENO])
  fi
@@ -22,16 +22,16 @@ index 4829288..9f9a155 100644
  AC_CONFIG_FILES([Makefile src/Makefile])
  AC_OUTPUT
 diff --git a/src/Makefile.am b/src/Makefile.am
-index 139355e..e95491a 100644
+index 173246535de4c8058a5f61ffbc3df569a44ec556..a128d0f2eb979e4a6aa0fddb2c2ee4e1bc622f76 100644
 --- a/src/Makefile.am
 +++ b/src/Makefile.am
-@@ -66,7 +66,9 @@ syntax.c syntax.h: mksyntax
+@@ -64,7 +64,9 @@ syntax.c syntax.h: mksyntax
  signames.c: mksignames
- 	./$^
+ 	$(AM_V_GEN)./$^
 
 +if BUILD_HELPERS
  mksyntax: token.h
 
  $(HELPERS): %: %.c
- 	$(COMPILE_FOR_BUILD) -o $@ $<
+ 	$(AM_V_CC)$(COMPILE_FOR_BUILD) -o $@ $<
 +endif

Tests/LibC/CMakeLists.txt

@@ -34,6 +34,7 @@ set(TEST_SOURCES
     TestSnprintf.cpp
     TestStackSmash.cpp
     TestStdio.cpp
+    TestStpncpy.cpp
     TestStrlcpy.cpp
     TestStrtodAccuracy.cpp
     TestTruncate.cpp

Tests/LibC/TestStpncpy.cpp

@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2026, Linus Groh <mail@linusgroh.de>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibTest/TestCase.h>
+
+#include <string.h>
+
+TEST_CASE(src_longer_than_dest)
+{
+    char dest[8] = {};
+    memset(dest, 'X', sizeof(dest));
+
+    char* result = stpncpy(dest, "Hello World!", sizeof(dest));
+    EXPECT_EQ(result, dest + sizeof(dest));
+    EXPECT(memcmp(dest, "Hello Wo", sizeof(dest)) == 0);
+}
+
+TEST_CASE(src_shorter_than_dest)
+{
+    char dest[8] = {};
+    memset(dest, 'X', sizeof(dest));
+
+    char* result = stpncpy(dest, "Hello", sizeof(dest));
+    EXPECT_EQ(result, dest + 5);
+    EXPECT(memcmp(dest, "Hello\0\0\0", sizeof(dest)) == 0);
+}
+
+TEST_CASE(dest_empty)
+{
+    char dest[8] = {};
+    memset(dest, 'X', sizeof(dest));
+
+    char* result = stpncpy(dest, "Hello World!", 0);
+    EXPECT_EQ(result, dest);
+    EXPECT(memcmp(dest, "XXXXXXXX", sizeof(dest)) == 0);
+}
+
+TEST_CASE(nul_in_src)
+{
+    char dest[8] = {};
+    memset(dest, 'X', sizeof(dest));
+
+    char const src[] = { 'a', 'b', '\0', 'c', 'd' };
+    char* result = stpncpy(dest, src, sizeof(dest));
+    EXPECT_EQ(result, dest + 2);
+    EXPECT(memcmp(dest, "ab\0\0\0\0\0\0", sizeof(dest)) == 0);
+}

Userland/Libraries/LibC/string.cpp

@@ -219,6 +219,18 @@ char* stpcpy(char* dest, char const* src)
     return dest;
 }
 
+// https://pubs.opengroup.org/onlinepubs/9699919799/functions/stpncpy.html
+char* stpncpy(char* dest, char const* src, size_t n)
+{
+    size_t i;
+    for (i = 0; i < n && src[i] != '\0'; ++i)
+        dest[i] = src[i];
+    char* result = &dest[i];
+    for (; i < n; ++i)
+        dest[i] = '\0';
+    return result;
+}
+
 // https://pubs.opengroup.org/onlinepubs/9699919799/functions/strncpy.html
 char* strncpy(char* dest, char const* src, size_t n)
 {

Userland/Libraries/LibC/string.h

@@ -48,6 +48,7 @@ __attribute__((malloc)) char* strndup(char const*, size_t);
 char* strcpy(char* dest, char const* src);
 char* stpcpy(char* dest, char const* src);
 char* strncpy(char* dest, char const* src, size_t);
+char* stpncpy(char* dest, char const* src, size_t);
 __attribute__((warn_unused_result)) size_t strlcpy(char* dest, char const* src, size_t);
 
 char* strchr(char const*, int c);