From 2d187d58553becd61677a2db0181ff2c7b07c8a3 Mon Sep 17 00:00:00 2001
From: Alexander Kapshuk <alexander.kapshuk@gmail.com>
Date: Mon, 22 Aug 2016 21:19:17 +0300
Subject: [PATCH] ver_linux: complete awk implementation

The algorithm that extracts the version number of the utility being
queried, and prints the name of the utility and its version number is
currently implemented in awk. The code is used throughout the script,
making its use repetative. The proposed implementation confines the
algorithm in question to a function, which makes the script easier to
read overall, as well as considerably reduces the number of lines of
code. Every attempt has been made to retain the look and the format
generated by the current implementation.

Signed-off-by: Alexander Kapshuk <alexander.kapshuk@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 scripts/ver_linux.awk | 89 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100755 scripts/ver_linux.awk

diff --git a/scripts/ver_linux.awk b/scripts/ver_linux.awk
new file mode 100755
index 000000000000..430b201f3e25
--- /dev/null
+++ b/scripts/ver_linux.awk
@@ -0,0 +1,89 @@
+#!/bin/awk -f
+# Before running this script please ensure that your PATH is
+# typical as you use for compilation/installation. I use
+# /bin /sbin /usr/bin /usr/sbin /usr/local/bin, but it may
+# differ on your system.
+
+BEGIN {
+	usage = "If some fields are empty or look unusual you may have an old version.\n"
+	usage = usage "Compare to the current minimal requirements in Documentation/Changes.\n"
+	print usage
+
+	system("uname -a")
+	printf("\n")
+
+	printversion("GNU C", version("gcc -dumpversion 2>&1"))
+	printversion("GNU Make", version("make --version 2>&1"))
+	printversion("Binutils", version("ld -v 2>&1"))
+	printversion("Util-linux", version("mount --version 2>&1"))
+	printversion("Mount", version("mount --version 2>&1"))
+	printversion("Module-init-tools", version("depmod -V  2>&1"))
+	printversion("E2fsprogs", version("tune2fs 2>&1"))
+	printversion("Jfsutils", version("fsck.jfs -V 2>&1"))
+	printversion("Reiserfsprogs", version("reiserfsck -V 2>&1"))
+	printversion("Reiser4fsprogs", version("fsck.reiser4 -V 2>&1"))
+	printversion("Xfsprogs", version("xfs_db -V 2>&1"))
+	printversion("Pcmciautils", version("pccardctl -V 2>&1"))
+	printversion("Pcmcia-cs", version("cardmgr -V 2>&1"))
+	printversion("Quota-tools", version("quota -V 2>&1"))
+	printversion("PPP", version("pppd --version 2>&1"))
+	printversion("Isdn4k-utils", version("isdnctrl 2>&1"))
+	printversion("Nfs-utils", version("showmount --version 2>&1"))
+
+	if (system("test -r /proc/self/maps") == 0) {
+		while (getline <"/proc/self/maps" > 0) {
+			n = split($0, procmaps, "/")
+			if (/libc.*so$/ && match(procmaps[n], /[0-9]+([.]?[0-9]+)+/)) {
+				ver = substr(procmaps[n], RSTART, RLENGTH)
+				printversion("Linux C Library", ver)
+				break
+			}
+		}
+	}
+
+	printversion("Dynamic linker (ldd)", version("ldd --version 2>&1"))
+
+	while ("ldconfig -p 2>/dev/null" | getline > 0) {
+		if (/(libg|stdc)[+]+\.so/) {
+			libcpp = $NF
+			break
+		}
+	}
+	if (system("test -r " libcpp) == 0)
+		printversion("Linux C++ Library", version("readlink " libcpp))
+
+	printversion("Procps", version("ps --version 2>&1"))
+	printversion("Net-tools", version("ifconfig --version 2>&1"))
+	printversion("Kbd", version("loadkeys -V 2>&1"))
+	printversion("Console-tools", version("loadkeys -V 2>&1"))
+	printversion("Oprofile", version("oprofiled --version 2>&1"))
+	printversion("Sh-utils", version("expr --v 2>&1"))
+	printversion("Udev", version("udevadm --version 2>&1"))
+	printversion("Wireless-tools", version("iwconfig --version 2>&1"))
+
+	if (system("test -r /proc/modules") == 0) {
+		while ("sort /proc/modules" | getline > 0) {
+			mods = mods sep $1
+			sep = " "
+		}
+		printversion("Modules Loaded", mods)
+	}
+}
+
+function version(cmd,    ver) {
+	while (cmd | getline > 0) {
+		if (!/ver_linux/ && match($0, /[0-9]+([.]?[0-9]+)+/)) {
+			ver = substr($0, RSTART, RLENGTH)
+			break
+		}
+	}
+	close(cmd)
+	return ver
+}
+
+function printversion(name, value,  ofmt) {
+	if (value != "") {
+		ofmt = "%-20s\t%s\n"
+		printf(ofmt, name, value)
+	}
+}
-- 
2.20.1