topic Re: awk escape sequence in Operating System - Linux

awk escape sequence

Denis Goffinet — Fri, 31 Oct 2003 10:08:30 GMT

Hi,

Under HP-UX awk version, the escape sequence \c permits to continue writing to the same line with the next print command ( no carriage return, new line is set)

Under linux, the escape sequence \c doesn't exist so it replace it by a "c" character

awk: cmd. line:5: warning: escape sequence `\c' treated as plain `c'

Does an equivalent escape sequence or other stuff would work?

Thanks in advance
Denis

Re: awk escape sequence

Huc_1 — Fri, 31 Oct 2003 10:24:59 GMT

I am no awk expert far from it

I just know there is a compatibility switch in gawk

awk --compat 'your srcipt'

Probably there are other way's

will have a look

J-P

Re: awk escape sequence

Denis Goffinet — Fri, 31 Oct 2003 10:31:36 GMT

--compat or --traditional gaves me the same output problem

Re: awk escape sequence

Huc_1 — Fri, 31 Oct 2003 11:04:07 GMT

A simple \

Seem's to do it

extarcted from man page

a line can be continued by ending it with a â \â , in
which case the newline will be ignored.

end of extract from man page.

Does that work ?

Re: awk escape sequence

Huc_1 — Fri, 31 Oct 2003 11:29:26 GMT

Sorry about mess up character in previous reply
just did a cut and past from linux man gawk to reply, and should have preview before submit

In my doc here there is also the
-W posix

switch have you tried that ?

If none of the above works for you could attach a small example script that work under HP-UX and does not work under linux... so we can try or hand at this ?

J-P

Re: awk escape sequence

Bob_Vance — Sun, 02 Nov 2003 09:01:27 GMT

Use 'printf', instead of 'print'.

'printf' does not automatically add a newline to the end of the line and you can format it anyway you want:

mandy-DEB ## echo -e '\n'| awk '{printf NR " hohoho "}'
1 hohoho 2 hohoho

mandy-DEB ## echo -e '\n'| awk '{printf NR " hohoho\n"}'
1 hohoho
2 hohoho

Re: awk escape sequence

Denis Goffinet — Mon, 03 Nov 2003 02:15:44 GMT

Huc > a backslash at the end of a line permits to continue a statement on a new line ( very useful when long statement are used at prompt) but do not allow to continue the output of the script to be on the same line.
> "-W posix" doesn't seems to change anything as the error message is still the same

Bob > That will do the trick, thank you for this workaround

Thank you all for your help

Regards
Denis

Re: awk escape sequence

Huc_1 — Mon, 03 Nov 2003 06:33:38 GMT

Nice to know there are some knowledgeable awk reading/answering this forum as I sayed I am no expert, but you got your answer and this allowed me to dig a little in awk and learn more then I could deliver. nice

Thanks for the points.

(Zero points for this answer of course)

J-P