Enhancement: Support OpenBSD - Document compilation instructions and code changes to support OpenBSD

docs/install.md

@@ -205,6 +205,23 @@
 sudo zypper install libnotify-devel
 ```
 
+### Dependencies: OpenBSD
+
+```text
+pkg_add bash bash-completion gmake pkgconf autoconf automake newsyslog libinotify git sqlite3 dmd
+```
+> [!NOTE]
+> If asked to chose package for autoconf, select `autoconf-2.72p0`
+> 
+> If asked to chose package for automake, select `automake-1.16.5`
+
+For GUI notifications the following is also necessary:
+```text
+pkg_add libnotify
+```
+> [!NOTE]
+> Install the required OpenBSD packages as 'root' unless you have installed 'sudo'
+
 ## Compilation & Installation
 ### High Level Steps
 1.  Install the platform dependencies for your platform
@@ -234,15 +251,84 @@
 ```
 
 ### FreeBSD: Building the application using FreeBSD version of LDC
+> [!NOTE]
+> It is recommended to build and install the application as 'root' unless you have installed 'sudo'
+
 ```text
 git clone https://github.com/abraunegg/onedrive.git
 cd onedrive
 ./configure
 gmake clean; gmake;
 gmake install
 ```
+
+### OpenBSD: Building the application using OpenBSD version of DMD
 > [!NOTE]
-> Install the application as 'root' unless you have installed 'sudo'
+> It is recommended to build and install the application as 'root' unless you have installed 'sudo'
+
+#### Configure 'ldconfig' for libinotify
+The `libinotify` port installs into a subdirectory of `/usr/local/lib` so it is not picked up by the default `ld.so` "hints" or search paths.
+
+Use `ldconfig` to modify the shared library search path. There are a number of ways to do this so check out `man ldconfig` for your prefered way to do it. An example is:
+```
+ldconfig -m /usr/local/lib/inotify
+```
+
+#### Configure 'login.conf' for non-root users for compilation
+When compiling the application, you may run into an "our of memory" type error during compile. This is due to the extra security layers of OpenBSD and their "login class database" parameters. 
+
+Check out `man login.conf` for more details but generally you will be looking for a `datasize-cur` and `datasize-max` setting under whichever login class your build user belongs to; most likely `default:`.
+
+The settings below were used to compile the application to create this documentation:
+```
+#
+# The default values
+# To alter the default authentication types change the line:
+#       :tc=auth-defaults:\
+# to read something like: (enables passwd, "myauth", and activ)
+#       :auth=passwd,myauth,activ:\
+# Any value changed in the daemon class should be reset in default
+# class.
+#
+default:\
+        :path=/usr/bin /bin /usr/sbin /sbin /usr/X11R6/bin /usr/local/bin /usr/local/sbin:\
+        :umask=022:\
+        :datasize-max=infinity:\
+        :datasize-cur=8192M:\
+        :maxproc-max=256:\
+        :maxproc-cur=128:\
+        :openfiles-max=1024:\
+        :openfiles-cur=512:\
+        :stacksize-cur=4M:\
+        :localcipher=blowfish,a:\
+        :tc=auth-defaults:\
+        :tc=auth-ftp-defaults:
+.....
+#
+# Staff have fewer restrictions and can login even when nologins are set.
+#
+staff:\
+        :datasize-cur=8192M:\
+        :datasize-max=infinity:\
+        :maxproc-max=512:\
+        :maxproc-cur=256:\
+        :ignorenologin:\
+        :requirehome@:\
+        :tc=default:
+```
+Ensure you run `cap_mkdb /etc/login.conf` to apply the new settings for users.
+
+Confirm these changes with `ulimit -a` after logging out and logging back in with your non-root user.
+
+#### Compiling the application on OpenBSD
+The base installation of OpenBSD uses `ksh` instead of `bash` so when running the `configure` scripts from the repo, bash must be used.
+```
+git clone https://github.com/abraunegg/onedrive.git
+cd onedrive
+bash ./configure
+gmake clean; gmake;
+gmake install
+```
 
 ### Linux: Building the application with GDC
 First, make sure at least version 15 of GDC is available in your path: