ver_linux: Assign constant RE to variable name for clarity
diff mbox series

Message ID 20190105170923.6424-1-alexander.kapshuk@gmail.com
State Accepted
Commit 2ca46ed207d5d4e3c7a183fe11e8a2d02f86e7c6
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Series
  • ver_linux: Assign constant RE to variable name for clarity
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Commit Message

Alexander Kapshuk Jan. 5, 2019, 5:09 p.m. UTC
The regular expression that matches the version number of a utility
being queried is used as a constant expression in the current
implementation. Assigning the RE in question to a variable gives it a
meaningful name that clearly expresses the intended use of the expression
without having to think about the details of implementation.

Signed-off-by: Alexander Kapshuk <alexander.kapshuk@gmail.com>
---
 scripts/ver_linux | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

Patch
diff mbox series

diff --git a/scripts/ver_linux b/scripts/ver_linux
index a6c728db05ce..810e608baa24 100755
--- a/scripts/ver_linux
+++ b/scripts/ver_linux
@@ -13,6 +13,8 @@  BEGIN {
 	system("uname -a")
 	printf("\n")
 
+	vernum = "[0-9]+([.]?[0-9]+)+"
+
 	printversion("GNU C", version("gcc -dumpversion"))
 	printversion("GNU Make", version("make --version"))
 	printversion("Binutils", version("ld -v"))
@@ -34,7 +36,7 @@  BEGIN {
 	while (getline <"/proc/self/maps" > 0) {
 		if (/libc.*\.so$/) {
 			n = split($0, procmaps, "/")
-			if (match(procmaps[n], /[0-9]+([.]?[0-9]+)+/)) {
+			if (match(procmaps[n], vernum)) {
 				ver = substr(procmaps[n], RSTART, RLENGTH)
 				printversion("Linux C Library", ver)
 				break
@@ -70,7 +72,7 @@  BEGIN {
 function version(cmd,    ver) {
 	cmd = cmd " 2>&1"
 	while (cmd | getline > 0) {
-		if (match($0, /[0-9]+([.]?[0-9]+)+/)) {
+		if (match($0, vernum)) {
 			ver = substr($0, RSTART, RLENGTH)
 			break
 		}