Fix sonarcloud warnings

docker/Dockerfile

@@ -1,12 +1,9 @@
 ARG DISTRO
 
-FROM ubuntu:noble as ubuntu_builder
-
-RUN apt-get update && \
-    apt-get install --no-install-recommends -y apt-transport-https
+FROM ubuntu:noble AS ubuntu_builder
 
 # Install build dependencies
-RUN apt-get install --no-install-recommends -y gcc make libc6-dev libx11-dev libxmu-dev libxcb-randr0-dev libpng-dev libssl-dev libunistring-dev
+RUN apt-get update && apt-get install --no-install-recommends -y gcc make libc6-dev libx11-dev libxmu-dev libxcb-randr0-dev libpng-dev libssl-dev libunistring-dev
 
 # Install test dependencies
 RUN apt-get install --no-install-recommends -y openssl xclip python3-minimal diffutils findutils coreutils netcat-openbsd sed
@@ -16,15 +13,15 @@ WORKDIR /debs
 RUN apt-get download xvfb libunwind8 libgl1 libpixman-1-0 libxfont2 libglvnd0 libglx0 libfontenc1 libfreetype6 libbrotli1 xkb-data libxkbfile1 x11-xkb-utils
 RUN dpkg --force-depends -i ./*.deb 2>/dev/null && apt-get clean -y
 
-FROM fedora:41 as fedora_builder
+FROM fedora:41 AS fedora_builder
 
 # Install build dependencies
 RUN dnf install --setopt=install_weak_deps=False -y gcc make glibc-devel libX11-devel libXmu-devel libpng-devel openssl-devel libunistring-devel
 
 # Install test dependencies
 RUN dnf install --setopt=install_weak_deps=False -y xorg-x11-server-Xvfb openssl xclip python3 findutils diffutils coreutils netcat sed && dnf clean all
 
-FROM archlinux:base as arch_builder
+FROM archlinux:base AS arch_builder
 
 # Install build dependencies
 RUN pacman -Sy && \

docker/release/Dockerfile

@@ -1,20 +1,17 @@
 ARG DISTRO
 ARG VERSION="latest"
 
-FROM ubuntu:${VERSION} as ubuntu_builder
-
-RUN apt-get update && \
-    apt-get install --no-install-recommends -y apt-transport-https
+FROM ubuntu:${VERSION} AS ubuntu_builder
 
 # Install dependencies
-RUN apt-get install --no-install-recommends -y coreutils gcc make libc6-dev libx11-dev libxmu-dev libxcb-randr0-dev libpng-dev libssl-dev libunistring-dev && apt-get clean -y
+RUN apt-get update && apt-get install --no-install-recommends -y coreutils gcc make libc6-dev libx11-dev libxmu-dev libxcb-randr0-dev libpng-dev libssl-dev libunistring-dev && apt-get clean -y
 
-FROM fedora:41 as fedora_builder
+FROM fedora:41 AS fedora_builder
 
 # Install dependencies
 RUN dnf install --setopt=install_weak_deps=False -y coreutils gcc make glibc-devel libX11-devel libXmu-devel libpng-devel openssl-devel libunistring-devel
 
-FROM archlinux:base as arch_builder
+FROM archlinux:base AS arch_builder
 
 # Install dependencies
 RUN pacman -Sy && \

docs/examples/v1.html

@@ -480,7 +480,7 @@ <h2 id="get_image">Get Image</h2>
                         1B B0 42 B9 95 01 F5 AC 8B BF 9A D6 CD FC 0F 82 8C 0E 05 22 B1 80 9C 00 00 00 00 49 45 4E 44 AE
                         42 60 82</td>
                     <td>Server sends the image copied to the clipboard (or a screenshot), which is 95 bytes long.<br>
-                        <div class="image"><span>The image is: </span><img alt="shared image"
+                        <div class="image"><span>The image is: </span><img alt="shared item"
                                 src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAIAAAACDbGyAAAAJklEQVQI11XLIRIAIBCAQHD8/5cxaPBoG7BCuZUB9ayLv5rWzfwPgowOBSKxgJwAAAAASUVORK5CYII=">
                         </div>
                     </td>

docs/examples/v2.html

@@ -665,7 +665,7 @@ <h2 id="get_image">Get Image</h2>
                         1B B0 42 B9 95 01 F5 AC 8B BF 9A D6 CD FC 0F 82 8C 0E 05 22 B1 80 9C 00 00 00 00 49 45 4E 44 AE
                         42 60 82</td>
                     <td>Server sends the image copied to the clipboard (or a screenshot), which is 95 bytes long.<br>
-                        <div class="image"><span>The image is: </span><img alt="shared image"
+                        <div class="image"><span>The image is: </span><img alt="shared item"
                                 src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAIAAAACDbGyAAAAJklEQVQI11XLIRIAIBCAQHD8/5cxaPBoG7BCuZUB9ayLv5rWzfwPgowOBSKxgJwAAAAASUVORK5CYII=">
                         </div>
                     </td>

docs/examples/v3.html

@@ -761,7 +761,7 @@ <h2 id="get_image">Get Image/Screenshot</h2>
                         1B B0 42 B9 95 01 F5 AC 8B BF 9A D6 CD FC 0F 82 8C 0E 05 22 B1 80 9C 00 00 00 00 49 45 4E 44 AE
                         42 60 82</td>
                     <td>Server sends the image copied to the clipboard (or a screenshot), which is 95 bytes long.<br>
-                        <div class="image"><span>The image is: </span><img alt="shared image"
+                        <div class="image"><span>The image is: </span><img alt="shared item"
                                 src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAIAAAACDbGyAAAAJklEQVQI11XLIRIAIBCAQHD8/5cxaPBoG7BCuZUB9ayLv5rWzfwPgowOBSKxgJwAAAAASUVORK5CYII=">
                         </div>
                     </td>
@@ -829,7 +829,7 @@ <h2 id="get_copied_image_only">Get Copied Image Only</h2>
                         1B B0 42 B9 95 01 F5 AC 8B BF 9A D6 CD FC 0F 82 8C 0E 05 22 B1 80 9C 00 00 00 00 49 45 4E 44 AE
                         42 60 82</td>
                     <td>Server sends the image copied to the clipboard, which is 95 bytes long.<br>
-                        <div class="image"><span>The image is: </span><img alt="shared image"
+                        <div class="image"><span>The image is: </span><img alt="shared item"
                                 src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAIAAAACDbGyAAAAJklEQVQI11XLIRIAIBCAQHD8/5cxaPBoG7BCuZUB9ayLv5rWzfwPgowOBSKxgJwAAAAASUVORK5CYII=">
                         </div>
                     </td>

src/xclip/xclib.h

@@ -41,7 +41,7 @@
 extern int xcout(Display *, Window, XEvent, Atom, Atom, Atom *, unsigned char **, unsigned long *, unsigned int *);
 extern int xcin(Display *, Window *, XEvent, Atom *, Atom, const unsigned char *, unsigned long, unsigned long *,
                 unsigned int *);
-extern void *xcmalloc(size_t);
-extern void *xcrealloc(void *, size_t);
+extern void *xcmalloc(size_t) __attribute__((__malloc__));
+extern void *xcrealloc(void *, size_t) __attribute__((__malloc__));
 
 #endif  // XCLIP_XCLIB_H_