phreaknet.sh: more openSUSE compatibility patches (#70)

* Update phreaknet.sh

Added a check for openSUSE Leap in the package manager detector section.

* install: Add kernel header detection for openSUSE

openSUSE uses a different path format for kernel headers that was not checked for by install_kernel_headers(), resulting in an error. This commit adds detection for these paths.

* install: Add missing kernel package for zypper

In openSUSE, one of the "kernel-*-devel" packages is required to build kernel modules, otherwise PhreakScript fails to find the kernel build directory. This commit adds the "default" version (a safe assumption, given it's for the standard kernel) of this package to the list of kernel module-related packages that zypper is told to install.

* install: Check for build directory on openSUSE

openSUSE does not place kernel build directories in /usr/lib/linux-kbuild-*. This commit adds a check for /usr/src/linux-*, where it is located, in case the first path doesn't exist.

* install: add a missing newline to the previously-added build directory code

I forgot a newline in the "no build directory found" message, so I added one.

* install: zypper: added autoconf

Because autoconf wasn't installed, the DAHDI tools installation failed, so I added it to the list of packages.

* install: add two more zypper packages, add message for zypper users on unsupported modules.

After installing libtool and automake, DAHDI finally built sucessfully, so I added them to the prereqs.
I also discovered that openSUSE disables the loading of "unsupported" (i.e. external, not signed by SUSE) kernel modules, so I added a message that displays on zypper-based systems that have installed DAHDI that tells the user how to enable loading them, otherwise DAHDI won't work.

Author: htravis123

phreaknet.sh

@@ -1076,7 +1076,7 @@ install_prereq() {
 			fi
 		fi
 	elif [ "$PAC_MAN" = "zypper" ]; then
-		PREREQ_PACKAGES="$PREREQ_PACKAGES git-core make patch gawk subversion bzip2 gcc-c++"
+		PREREQ_PACKAGES="$PREREQ_PACKAGES git-core make patch gawk autoconf automake libtool subversion bzip2 gcc-c++"
 		if [ "$CHAN_DAHDI" = "1" ]; then
 			PREREQ_PACKAGES="$PREREQ_PACKAGES newt-devel dwarves"
 		fi
@@ -2006,7 +2006,8 @@ install_kernel_headers() {
 				echog "kernel-devel is matched with kernel. Package provides $KERNEL_DEVEL_VERSION, and running kernel is $kernel_ver"
 			fi
 		elif [ "$PAC_MAN" = "zypper" ]; then
-			install_package "kmod kernel-source"
+			# There are multiple kernel-*-devel packages in the openSUSE repos. The default one should be a safe assumption.
+			install_package "kmod kernel-source kernel-devel kernel-default-devel"
 		elif [ "$PAC_MAN" = "pacman" ]; then
 			install_package "kmod linux-headers"
 		elif [ "$PAC_MAN" = "apk" ]; then
@@ -2046,7 +2047,8 @@ install_kernel_headers() {
 		# Check that the kernel sources are really present
 		# /usr/src/linux-headers-* on Debian
 		# /usr/src/kernels on Rocky Linux
-		numkernheaders=$( ls /usr/src/linux-headers-* /usr/src/kernels/* 2>/dev/null | wc -w )
+		# /usr/src/linux-* on openSUSE
+		numkernheaders=$( ls /usr/src/linux-headers-* /usr/src/kernels/* /usr/src/linux-* 2>/dev/null | wc -w )
 		if [ "$numkernheaders" = "0" ]; then
 			echoerr "Kernel headers do not appear to be installed... compilation will likely fail"
 			sleep 2
@@ -2214,6 +2216,13 @@ install_dahdi() {
 	KERNEL_MM=$( uname -r | cut -d'.' -f1-2 )
 	printf "Kernel major.minor version is %s\n" "$KERNEL_MM"
 	KBUILD_DIR="/usr/lib/linux-kbuild-${KERNEL_MM}"
+	# Check if this directory exists, otherwise try looking in /usr/src
+	# This is for openSUSE compatibility
+	if [ ! -d "$KBUILD_DIR" ]; then
+		KERNEL_VER=$( uname -r | cut -d'-' -f1-2)
+		printf "No build directory found in /usr/lib, checking /usr/src for ${KERNEL_VER}...\n"
+		KBUILD_DIR="/usr/src/linux-${KERNEL_VER}"
+	fi
 	if [ -d "$KBUILD_DIR" ]; then
 		MODFINAL_FILE="${KBUILD_DIR}/scripts/Makefile.modfinal"
 		if [ -f "$MODFINAL_FILE" ]; then
@@ -4214,6 +4223,10 @@ elif [ "$cmd" = "install" ]; then
 	if [ "$CHAN_DAHDI" = "1" ]; then
 		echog "Note that DAHDI was installed and requires a reboot (or hotswap of kernel modules, e.g. phreaknet restart) before it can be used."
 		echog "Note that you will need to manually configure /etc/dahdi/system.conf appropriately for your spans."
+		if [ "$PAC_MAN" = "zypper" ]; then
+			echog "Additionally, since you appear to be using openSUSE/SUSE Linux Enterprise, you will need to enable the loading of unsupported kernel modules."
+			echog "See https://support.scc.suse.com/s/kb/Enable-loading-of-unsupported-kernel-modules for details on how to do this."
+		fi
 	fi
 	if [ "$FREEPBX_GUI" = "1" ]; then
 		printf "%s\n" "Installation of FreePBX GUI will begin in 5 seconds..."