[sr-dev] git:5.1:b43fbb18: kamctl: make jsonrpc filter portable

[Daniel-Constantin Mierla]

Module: kamailio
Branch: 5.1
Commit: b43fbb18acb86b97ff86bd867ab46c25747b2cf0
URL: https://github.com/kamailio/kamailio/commit/b43fbb18acb86b97ff86bd867ab46c25747b2cf0

Author: Sebastian Kemper <sebastian_ml at gmx.net>
Committer: Daniel-Constantin Mierla <miconda at gmail.com>
Date: 2018-10-19T08:25:56+02:00

kamctl: make jsonrpc filter portable

The filter has a regex looking for a literal '{' in the beginning of a
line. Some awk implementations interpret this as a meta character, so
the regex is deemed broken. Example with busybox awk (POSIX):

root at hank2:~# kamctl ps
awk: bad regex '^{.+"id"[ 	]*:[ 	]*[0-9]+[ 	]*}$': Invalid contents of {}
root at hank2:~#

To fix this enclose the character in square brackets. This always
matches for a literal '{' and is portable.

Signed-off-by: Sebastian Kemper <sebastian_ml at gmx.net>
(cherry picked from commit 59d287586f502a8df71c2e91899fde49594e072e)

---

Modified: utils/kamctl/kamctl.base

---

Diff:  https://github.com/kamailio/kamailio/commit/b43fbb18acb86b97ff86bd867ab46c25747b2cf0.diff
Patch: https://github.com/kamailio/kamailio/commit/b43fbb18acb86b97ff86bd867ab46c25747b2cf0.patch

---

diff --git a/utils/kamctl/kamctl.base b/utils/kamctl/kamctl.base
index 641449422c..2873c2ddb8 100644
--- a/utils/kamctl/kamctl.base
+++ b/utils/kamctl/kamctl.base
@@ -699,7 +699,7 @@ filter_json()
 	$AWK 'function ltrim(s) { sub(/^[ \t\r\n]+/, "", s); return s }
 		BEGIN { line=0; IGNORECASE=1; }
 		{ line++; }
-		NR == 1 && /^{.+"id"[ \t]*:[ \t]*[0-9]+[ \t]*}$/ { print; next; }
+		NR == 1 && /^[{].+"id"[ \t]*:[ \t]*[0-9]+[ \t]*}$/ { print; next; }
 		NR == 1 && /^200 OK/ { next; }
 		/^[ \t]*"jsonrpc":[ \t]*"2.0"/ { print; next; }
 		/^[ \t]*"result":[ \t]*\[.+/ {