The POSIX [:cntrl:] character class does not exactly cover the same chars which must be escaped according to https://tools.ietf.org/html/rfc7159#section-7 (i.e. U+0000 through U+001F). [:cntrl:] does also cover U+007F, and all C1 control chars when used in a UTF locale. See the below example where I am getting an error in my locale "en_US.UTF-8". Apart from using LC_ALL=C, the error can be avoided when changing [:cntrl:] to the range defined in the spec: \x00-\x1F.
$ echo world_bank109.json | awk -f JSON.awk > /dev/null
world_bank109.json: expected <value> but got <"> at input token 263
, "productlinetype" : "L" , "project_abstract" : { "cdata" : <<">> T h e o b j e c t i
$ echo world_bank109.json | LC_ALL=C awk -f JSON.awk > /dev/null
(no error message here)
world_bank109.json.txt, which is line 109 from the world bank sample file at http://jsonstudio.com/resources/
The POSIX [:cntrl:] character class does not exactly cover the same chars which must be escaped according to https://tools.ietf.org/html/rfc7159#section-7 (i.e. U+0000 through U+001F). [:cntrl:] does also cover U+007F, and all C1 control chars when used in a UTF locale. See the below example where I am getting an error in my locale "en_US.UTF-8". Apart from using LC_ALL=C, the error can be avoided when changing [:cntrl:] to the range defined in the spec: \x00-\x1F.
$ echo world_bank109.json | awk -f JSON.awk > /dev/nullworld_bank109.json: expected <value> but got <"> at input token 263, "productlinetype" : "L" , "project_abstract" : { "cdata" : <<">> T h e o b j e c t i$ echo world_bank109.json | LC_ALL=C awk -f JSON.awk > /dev/null(no error message here)
world_bank109.json.txt, which is line 109 from the world bank sample file at http://jsonstudio.com/resources/