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AllAboutGetline
//Editor's notes: The article was originally posted on the comp.lang.awk newsgroup, and can still be . . . all other cases, it's clearest, simplest, less error-prone, and easiest to maintain to let awks normal . . . between a normal EOF or some read or opening error, you have to use gawks ERRNO variable or code . . . > 0) { ... } close(file) if(e < 0) some_error_handling }}} **b)** Don't forget to close() any . . .
16K - last updated 2009-02-15 22:14 UTC by waldner

AwkDc
This is an awk implementation of the [http://www.gnu.org/software/bc/manual/dc-1.05/html_mono/dc.html|dc] . . . not an integer - catch this case # and throw an error message. Also see how GNU dc # handles the case. . . . { _dc_put(stk, tos2 + tos1) } else { # FIXME: error message here # FIXME: extend '+' to operate on . . . { _dc_put(stk, tos2 - tos1) } else { # FIXME: error message here } } function _dc_mul(stk, tos1, . . . { _dc_put(stk, tos2 * tos1) } else { # FIXME: error message here # FIXME: take into account variable . . .
12K - last updated 2008-07-17 14:47 UTC by gnomon

AwkGuide
** Work in Progress ** {{{ import from Mark Hobley's wiki }}} <toc> ---- == Overview * [[Overview]] . . . * [[enumeration]] * [[environment|ENVIRON]] * [[error handling]] * [[escape sequence]]s * [[expression]]s . . .
4K - last updated 2011-08-14 15:57 UTC by markhobley

AwkOnWindowsHowto
AwkOnWindowsHowto\\ rough cut - needs edit {{{ 3) awk command line switches/usage from a win32 cmd.exe . . . are valid instead of ^ #: system() returns errorcode/256 eg system("%awk% BEGIN{exit(256)}) #: . . .
3K - last updated 2010-10-24 07:44 UTC by g0pher

compound assignment operator
The *compound assignment operators* (also called *combination assignment operators*) provide a more concise . . . results to occur: {{{ a = b + c += 2 ; # Syntax error: you cannot assign to 'b + c'. This is equivalent . . .
2K - last updated 2011-03-27 09:46 UTC by markhobley

division
== Quotient Division == The [[slash]] symbol can be used as the division [[operator]] to produce the . . . Unix behaviour is to abort awk with a fatal error, if a division by zero is encountered. === mawk . . . The mawk interpreter does not abort with a fatal error if a division by zero is encountered. Instead . . . an inf string without producing a warning or error: # This will cause a fatal error in traditional . . .
2K - last updated 2011-03-20 07:07 UTC by markhobley

dollarint
A [[dollar]] sign and followed by an [[integer]] are used to refer to [[field]]s within the current [[record]]: . . . will cause [[undefined behaviour]], or a [[fatal error]] will occur. == Assignment to dollarint variables . . .
3K - last updated 2011-06-25 05:28 UTC by pgas

EnvVarGeneral
**Answer 1:** On Unix, use "alternate quoting", e.g. {{{ awk -F: '$1 ~ /'"$USER"'/ {print $5}' /etc/passwd . . . BEGIN{ print # } awk: cmd. line:1: ^ syntax error }}} The above can be "corrected" by using double . . .
3K - last updated 2011-07-05 09:31 UTC by pgas

EnvVarGeneralJapanese
== 環境変数を使う **解答 1:** Unix では「もうひとつのクォート」を使います。例えば、以下のようなものです。 {{{ awk -F: '$1 ~ /'"$USER"'/ {print $5}' . . . BEGIN{ print # } awk: cmd. line:1: ^ syntax error }}} 上の例は awk プログラムの中でダブルクォートとして使用しているものとして「訂正」されてしまうかもしれません。 . . .
2K - last updated 2008-11-23 14:37 UTC by hi saito

Error
An error occured. (403 permission denied or something) . . .
1K - last updated 2009-03-05 09:43 UTC by pgas

field reference
== The field reference operator == The [[dollar]] symbol acts as a unary *field reference operator* and . . . will cause [[undefined behaviour]], or a [[fatal error]] will occur. === Assignment to referenced field . . .
2K - last updated 2011-06-28 09:12 UTC by markhobley

FileAndBitJoinClone
== Problem Description This was difficult to hash out. Eventually the task was described as, "for each . . . however, in the interest of avoiding stupid errors, # this should be checked. And then double-checked. . . .
7K - last updated 2009-03-08 16:26 UTC by waldner

FIXES
[[FIXES]]&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;revised:&nbsp;&nbsp; . . . instead ie -v alert=\007\\ system() returns errorcode / 256 (in windows)\\ cmd&nbsp;**{{{|}}}**&nbsp;getline;&nbsp;&nbsp;n . . . = close(cmd);&nbsp;&nbsp;n is the errorcode\\ nojoy re&nbsp;&nbsp;-v e==&nbsp;&nbsp;use . . .
6K - last updated 2014-01-15 23:17 UTC by g0ph3r

getline
The *getline* command can obtain input from any number of files and does not require a command line parameter . . . [[awk]] script should [[abort]] with a [[fatal]] error. However, some versions of [[awk]] do not [[abort]] . . .
1K - last updated 2011-05-02 20:14 UTC by markhobley

LshalOutputParser
=== Problem Specification 10:50 <Thanatermesis> i want to obtain the model of the disk, for example, . . . = 0 FS = " = " } function die(msg) { printf "ERROR on line %d of input: %s\n", NR, msg >> . . . info line encountered out of sequence, parsing error!") } }}} === Sample Output {{{ $ lshal | gawk . . .
3K - last updated 2008-06-27 16:22 UTC by gnomon

oawk
oawk is "old awk", it is the default /usr/bin/awk on Solaris and should not be used. You can also find . . . echo "foo" | /usr/bin/awk '1{print}' awk: syntax error near line 1 awk: bailing out near line 1 $ echo . . . "foo" | /usr/bin/awk '!x{print}' awk: syntax error near line 1 awk: bailing out near line 1 foo . . . '{print ($0=="foo") ? "yes" : "no"}' awk: syntax error near line 1 awk: illegal statement near line . . . '{print "<" sub(/o/,"X") ">"}' awk: syntax error near line 1 awk: illegal statement near line . . .
5K - last updated 2012-01-24 08:29 UTC by pgas

PrimeNumberSieve
This is the standard sieve of Eratosthenes implemented in portable awk. The running time of the bare . . . large enough to be distinguishable from timing error. ==== gawk 3.1.5 |=algorithm|=10,000|=20,000|=30,000|=32,767|=1,000,000| . . .
4K - last updated 2008-06-19 05:56 UTC by gnomon

printf
== Usage == === printf [ FORMAT, LIST ] === The **printf** [[variadic]] function provides generic [[string . . . {{{ echo "foo%d%sbar" | awk '{printf $0}' # error! echo "foo%d%sbar" | awk '{printf "%s", $0}' . . .
2K - last updated 2011-06-09 20:34 UTC by markhobley

qse
Not a standalone awk, but an interesting library embedding an awk interpreter, from [[https://groups.google.com/group/comp.lang.awk/browse_thread/thread/b02c0d75e49eab75/54fc2c6316d657bc?lnk=gst&q=c%2B%2B+embed#54fc2c6316d657bc| . . . \ xcout << QSE_T("ERR: ") << awk.getErrorMessage() << std::endl; \ return -1; \ } . . .
4K - last updated 2011-10-27 06:25 UTC by pgas

ReadDirectory
Getting a list of files in a directory is a tricky process. One might be tempted to try use ls and getline, . . . single file with the literal name "*"? That and error checking are left as an exercise for the reader. . . .
2K - last updated 2013-10-03 22:35 UTC by emg

Recursively Include C headers
=== Problem Specification i want to generate one big .hpp file out of multiple .hpp files and want to . . . -f \"%s\"", p)) == 0) return p } printf("error:%s: file not found in include_path\n", f) | "/bin/cat . . .
1K - last updated 2011-12-11 05:33 UTC by pgas

redirection
The awk scripting language provides support for redirection via the greaterthan, doublebeak and pipe . . . foobar.txt } }}} == Redirection to standard error == The traditional way to redirect output to . . . standard error is by using a kludge to pipeline redirection . . . external cat command: {{{ awk print "TST60000 An error has occured!" | "cat 1>&2" }}} On systems . . . made to this device: {{{ awk print "TST60000 An error has occured!" > /dev/stderr }}} . . .
2K - last updated 2011-06-25 05:12 UTC by pgas

return
The [[builtin]] '''return''' [[command]], can be used to exit from a [[function]] within the [[awk]] . . . === Using the return value command to set an errorlevel === By convention, when a function exits . . . # Function completed normal operation without an error It is possible to set an [[errorlevel]] using . . . return 245 # Function gave an internal error === Omitting the return value === In [[awk]], . . .
2K - last updated 2011-05-03 17:29 UTC by markhobley

SimpleCalc
Simple 4 operations calculator ... {{{ awk # usage: print calc("5 * (1 + 2) * 5 + 7") # reads and update . . . head -= 1 } if (head == 0) { print "Syntax Error" return 0 } else { head -= 1 } } } while ((head . . .
2K - last updated 2015-09-10 06:14 UTC by pgas

text.2.wiki.awk
&#35;: &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C:&#92;#&#92;awk&#92;lib&#92;text.2.wiki.awk\\ . . . \\ {{{ #: start /wait exefile & call echo.^%ERRORLEVEL^% }}} \\ {{{ #: %u%nircmd.exe exec show|hide|min|max . . .
11K - last updated 2012-09-24 14:55 UTC by g0ph3r

text 2 wiki.awk
{{{ #: C:\#\lib\awk\utl\text_2_wiki.awk #: 2012-09-15 23:40:11 #:rod.t_2012 #: This file is http://awk.freeshell.org/text_2_wiki.awk . . . cmd #: start /wait exefile & call echo.^%ERRORLEVEL^% #: %u%nircmd.exe exec show|hide|min|max . . .
2K - last updated 2012-09-16 09:12 UTC by g0ph3r

WartAndWishList
Awk is a wonderful language! That said, there are a few annoying bits... == The Good * well-documented . . . to a user-defined function. Awk does not throw errors when a user function is invoked with a mismatched . . . is either silent success or awk exiting with an error). This makes writing libraries of code difficult . . .
7K - last updated 2009-04-13 18:39 UTC by goedel

27 pages found.