Change wording, add 'Known Issues' section

Re-order distros to be alphabetical
Mention editing the script itself for configuration

README.md

@@ -1,16 +1,19 @@
 <div align="center">
 <h1>fet.sh</h1>
-fetch written in POSIX shell with no external commands
+a fetch written in POSIX shell with no external commands
 <br>
 <img src="screenshot.png" width="250px">
 </div>
 
 ### Installing
-**Arch:** [fet.sh-git](https://aur.archlinux.org/packages/fet.sh-git/) (AUR)  
-**Other Distros:** copy `fet.sh` to somewhere in $PATH
+**Arch:** [fet.sh-git](https://aur.archlinux.org/packages/fet.sh-git) (AUR)  
+**Gentoo:** [app-misc/fetsh](https://gpo.zugaina.org/Overlays/guru/app-misc/fetsh) (GURU overlay)  
+**KISS:** [fetsh](https://github.com/kisslinux/community/tree/master/community/fetsh) (Community)  
+**Nix:** [fet-sh](https://search.nixos.org/packages?show=fet-sh&query=fet-sh&channel=unstable) (nixpkgs-unstable)  
+Alternatively, copy `fet.sh` to somewhere in $PATH and mark it as executable (`chmod +x fet.sh`)
 
 ### Customization
-`fet.sh` can be configured using environment variables, for example:
+`fet.sh` has a few basic configuration options using environment variables, for example:
 ```
 $ info='n os wm sh n' fet.sh
 ```
@@ -18,3 +21,8 @@ Supported options are:
 - `accent` (0-7)
 - `info`
 - `separator`
+
+For less simple configuration I recommend editing the script, I tried to keep it simple.
+
+### Known Issues
+MacOS, BSD, and Android don't show much info.

fet.sh

@@ -1,110 +1,239 @@
 #!/bin/sh
 #
-#   fet.sh
-# a fetch in pure POSIX shell
+#    fet.sh
+#  a fetch in pure POSIX shell
 #
 
 # supress errors
 exec 2>/dev/null
 set --
-_() {  # [ a = b ] with globbing
+eq() {  # equals  |  [ a = b ] with globbing
 	case $1 in
-		$2) return
-	esac;! :
+		$2) ;;
+		*) return 1;;
+	esac
 }
 
-## Terminal
-while [ ! "$term" ]; do
-	# loop over lines in /proc/pid/status until it reaches PPid
-	# then save that to a variable and exit the file
-	while read -r line; do
-		_ "$line" "PPid*" && ppid=${line##*:?} && break
-	done < "/proc/${ppid:-$PPID}/status"
-
-	# get name of binary
-	read -r name < "/proc/$ppid/comm"
-	case $name in
-		*sh|"${0##*/}") ;;  # skip shells
-		*[Ll]ogin*|*init*) break;;  # exit when the top is reached
-		*) term="$name"  # anything else can be assumed to be the terminal
-	esac
-done
-
-## WM/DE
-# standard variables, mostly used for DEs
-if [ "$XDG_CURRENT_DESKTOP" ]; then
-	wm="$XDG_CURRENT_DESKTOP"
-elif [ "$DESKTOP_SESSION" ]; then
-	wm="$DESKTOP_SESSION"
-elif [ "$DISPLAY" ]; then
-	# non-standard WMs
-	# loop over all processes and check the binary name
-	for i in /proc/*/comm; do
-		read -r c < "$i"
-		case $c in
-			awesome|xmonad|qtile|i3*|*box*|*wm*) wm="$c"; break;;
-		esac
-	done
-fi
+## DE
+wm=$XDG_CURRENT_DESKTOP
+[ "$wm" ] || wm=$DESKTOP_SESSION
 
 ## Distro
-. /etc/os-release   # a common file that has variables about the distro
+# freedesktop.org/software/systemd/man/os-release.html
+# a common file that has variables about the distro
+for os in /etc/os-release /usr/lib/os-release; do
+	# some POSIX shells exit when trying to source a file that doesn't exist
+	[ -f $os ] && . $os && break
+done
 
-## Memory
-# loop over lines in /proc/meminfo until it reaches MemTotal,
-# then convert the amount (second word) from KB to MB
-while read -r line; do
-	_ "$line" "MemTotal*" && set -- $line && break
-done < /proc/meminfo
-mem="$(( $2 / 1000 ))MB"
+if [ -e /proc/$$/comm ]; then
+	## Terminal
+	while [ ! "$term" ]; do
+		# loop over lines in /proc/pid/status until it reaches PPid
+		# then save that to a variable and exit the file
+		while read -r line; do
+			eq "$line" 'PPid*' && ppid=${line##*:?} && break
+		done < "/proc/${ppid:-$PPID}/status"
 
-## Processor
-while read -r line; do
-	case $line in
-		vendor_id*) vendor="${line##*: }";;
-		model\ name*) cpu="${line##*: }"; break;;
+		# Make sure not to do an infinite loop
+		[ "$pppid" = "$ppid" ] && break
+		pppid=$ppid
+
+		# get name of binary
+		read -r name < "/proc/$ppid/comm"
+
+		case $name in
+			*sh|"${0##*/}") ;;  # skip shells
+			*[Ll]ogin*|*init*|*systemd*) break;;  # exit when the top is reached
+			# anything else can be assumed to be the terminal
+			# this has the side affect of catching tmux, but tmux
+			# detaches from the terminal and therefore ignoring that
+			# will just make the init the term
+			*) term=$name
+		esac
+	done
+
+	## WM/DE
+	[ ! "$wm" ] &&
+		# loop over all processes and check the binary name
+		for i in /proc/*/comm; do
+			read -r c < "$i"
+			case $c in
+				*bar*) ;;
+				awesome|xmonad*|qtile|sway|i3|[bfo]*box|*wm*) wm=${c%%-*}; break;;
+			esac
+		done
+
+	## Memory
+	# loop over lines in /proc/meminfo until it reaches MemTotal,
+	# then convert the amount (second word) from KB to MB
+	while read -r line; do
+		eq "$line" 'MemTotal*' && set -- $line && break
+	done < /proc/meminfo
+	mem="$(( $2 / 1000 ))MB"
+
+	## Processor
+	while read -r line; do
+		case $line in
+			vendor_id*) vendor="${line##*: } ";;
+			model\ name*) cpu=${line##*: }; break;;
+		esac
+	done < /proc/cpuinfo
+
+	## Uptime
+	# the simple math is shamefully stolen from aosync
+	IFS=. read -r uptime _ < /proc/uptime
+	d=$((uptime / 60 / 60 / 24))
+	up=$(printf %02d:%02d $((uptime / 60 / 60 % 24)) $((uptime / 60 % 60)))
+	[ "$d" -gt 0 ] && up="${d}d $up"
+
+	## Kernel
+	read -r _ _ version _ < /proc/version
+	kernel=${version%%-*}
+	eq "$version" '*Microsoft*' && ID="fake $ID"
+
+	## Motherboard // laptop
+	read -r model < /sys/devices/virtual/dmi/id/product_name
+	# invalid model handling
+	case $model in
+		# alternate file with slightly different info
+		# on my laptop it has the device model (instead of 'hp notebook')
+		# on my desktop it has the extended motherboard model
+		'System '*|'Default '*)
+			read -r model < /sys/devices/virtual/dmi/id/board_name
 	esac
-done < /proc/cpuinfo
-vendor="${vendor##*Authentic}"
-vendor="${vendor##*Genuine}"
-# this is so messy due to so many inconsistencies in the model names
-cpu="${cpu##*) }"
-cpu="${cpu%% @*}"
-cpu="${cpu%% CPU}"
-cpu="${cpu##CPU }"
-cpu="${cpu##*AMD }"
-cpu="${cpu%% with*}"
-cpu="${cpu% *-Core*}"
 
-## Uptime
-# the simple math is shamefully stolen from aosync
-IFS=. read -r uptime _ < /proc/uptime
-d=$((uptime / 60 / 60 / 24))
-up=$(printf %02d:%02d $((uptime / 60 / 60 % 24)) $((uptime / 60 % 60)))
-[ "$d" -gt 0 ] && up="${d}d $up"
+	## Packages
+	# clean environment, then make every file in the dir an argument,
+	# then save the argument count to $pkgs
+	set --
+	# kiss, arch, debian, void, gentoo
+	for i in '/var/db/kiss/installed/*'  '/var/lib/pacman/local/[0-9a-z]*' \
+	'/var/lib/dpkg/info/*.list'  '/var/db/xbps/.*'  '/var/db/pkg/*/*'; do
+		set -- $i
+		[ $# -gt 1 ] && break
+	done
+	pkgs=${###0}
 
-## Kernel
-read -r _ _ version _ < /proc/version
-kernel="${version%%-*}"
-_ "$version" "*Microsoft*" && ID="fake $ID"
+	read -r host < /proc/sys/kernel/hostname
+elif [ -f /var/run/dmesg.boot ]; then
+	# Both OpenBSD and FreeBSD use this file, however they're formatted differently
+	read -r bsd < /var/run/dmesg.boot
+	case $bsd in
+	Open*)
+		## OpenBSD cpu/mem/name
+		while read -r line; do
+			case $line in
+				'real mem'*)
+					# use the pre-formatted value which is in brackets
+					mem=${line##*\(}
+					mem=${mem%\)*}
+				;;
+				# set $cpu to everything before a comma and after the field name
+				cpu0:*)
+					cpu=${line#cpu0: }
+					# Remove excess info after the actual CPU name
+					cpu=${cpu%%,*}
+					# Set the CPU Manufacturer to the first word of the cpu
+					# variable [separated by '(' or ' ']
+					vendor=${cpu%%[\( ]*}
+					# We got all the info we want, stop reading
+					break
+				;;
+				# First 2 words in the file are OpenBSD <version>
+				*) [ "$ID" ] || { set -- $line; ID="$1 $2"; }
+			esac
+		done < /var/run/dmesg.boot
+		[ -d /var/db/pkg ] && set -- /var/db/pkg/* && pkgs=$#
+		read -r host < /etc/myname
+		host=${host%.*}
+	;;
+	# Everything else, assume FreeBSD (first line is ---<<BOOT>> or something)
+	*)
+		# shellcheck source=/dev/null
+		. /etc/rc.conf
+		# shut shellcheck up without disabling the warning
+		host=${hostname:-}
+
+		while read -r line; do
+			case $line in
+				# Ignore useless lines at the top
+				-*|'  '*) ;;
+				*trademark*) ;;
+
+				# os version
+				FreeBSD*)
+					# If the OS is already set, no need to set it again
+					[ "$ID" ] && continue
+					ID=${line%%-R*}
+				;;
+
+				CPU:*)
+					cpu=${cpu#CPU: }
+					# Remove excess info from after the actual CPU name
+					cpu=${line%\(*}
+				;;
+				*Origin=*)
+					# CPU Manufacturer
+					vendor=${line#*Origin=\"}
+					vendor="${vendor%%\"*} "
+				;;
+
+				'real memory'*)
+					# Get the pre-formatted amount which is inside brackets
+					mem=${line##*\(}
+					mem=${mem%\)*}
+					# This appears to be the final thing we need from the file,
+					# no need to read it more.
+					break
+			esac
+		done < /var/run/dmesg.boot
+	;;
+	esac
+elif v=/System/Library/CoreServices/SystemVersion.plist; [ -f "$v" ]; then
+	## Macos
+	# make sure this variable is empty as to not break the following loop
+	temp=
+	while read -r line; do
+		case $line in
+			# set a variable so the script knows it's on the correct line
+			# (the line after this one is the important one)
+			*ProductVersion*) temp=.;;
+			*)
+				# check if the script is reading the derired line, if not
+				# don't do anything
+				[ "$temp" ] || continue
+				# Remove everything before and including the first '>'
+				ID=${line#*>}
+				# Remove the other side of the XML tag, and insert the actual OS name
+				ID="MacOS ${ID%<*}"
+				# We got the info we want, end the loop.
+				break
+		esac
+	done < "$v"
+fi
+
+eq "$0" '*fetish' && printf 'Step on me daddy\n' && exit
+
+# help i dont know if it's a capital consistently
+eq "$wm" '*[Gg][Nn][Oo][Mm][Ee]*' && wm='foot DE'
 
 ## GTK
 while read -r line; do
-	_ "$line" "gtk-theme*" && gtk="${line##*=}" && break
-done < "${XDG_CONFIG_HOME:-$HOME/.config}"/gtk-3.0/settings.ini
+	eq "$line" 'gtk-theme*' && gtk=${line##*=} && break
+done < "${XDG_CONFIG_HOME:=$HOME/.config}/gtk-3.0/settings.ini"
 
-## Motherboard // laptop
-read -r model < /sys/devices/virtual/dmi/id/product_name
-
-## Packages
-# clean environment, then make every file in the dir an argument,
-# then save the argument count to $pkgs
-set --
-[ -d /var/db/kiss/installed ] && set -- /var/db/kiss/installed/*
-[ -d /var/lib/pacman/local  ] && set -- /var/lib/pacman/local/*
-[ -d /var/db/xbps ] && set -- /var/db/xbps/.*
-[ -d /var/db/pkg  ] && set -- /var/db/pkg/*/*  # gentoo
-[ $# -gt 0 ] && pkgs=$#
+# Shorten $cpu and $vendor
+# this is so messy due to so many inconsistencies in the model names
+vendor=${vendor##*Authentic}
+vendor=${vendor##*Genuine}
+cpu=${cpu##*) }
+cpu=${cpu%% @*}
+cpu=${cpu%% CPU}
+cpu=${cpu##CPU }
+cpu=${cpu##*AMD }
+cpu=${cpu%% with*}
+cpu=${cpu% *-Core*}
 
 col() {
 	printf '  '
@@ -119,8 +248,6 @@ print() {
 		"${accent:-4}" "$1" "${separator:- ~ }" "$2"
 }
 
-read -r host < /proc/sys/kernel/hostname
-
 # default value
 : "${info:=n user os sh wm up gtk cpu mem host kern pkgs term col n}"
 
@@ -129,10 +256,10 @@ for i in $info; do
 		n) echo;;
 		os) print os "$ID";;
 		sh) print sh "${SHELL##*/}";;
-		wm) print wm "$wm";;
+		wm) print wm "${wm##*/}";;
 		up) print up "$up";;
 		gtk) print gtk "${gtk# }";;
-		cpu) print cpu "$vendor $cpu";;
+		cpu) print cpu "$vendor$cpu";;
 		mem) print mem "$mem";;
 		host) print host "$model";;
 		kern) print kern "$kernel";;