Hi, Bash 5.2 has a broken built-in printf for float numbers.
Example: printf "%5.1f" 1024 should print "1024.0" (with standard locale LC_ALL=C.UTF-8)
Testing the Bash shell in different versions of recent Debian and Ubuntu setups, the output is wrong. Bug tracker for Debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1081424 .Depending on the Debian/Ubuntu patch version of Bash, the output made by Bash is either complete garbage (random), or "nan" or "-0.0". The output of the external command /usr/bin/printf is always correct.
The attached small Bash script runs Docker with different Debian and Ubuntu containers, generating test output with version information. The generated output of ./bash-bug-test1 | tee bash-bug-test1.log is attached as well.
-- Best regards / Mit freundlichen Grüßen / Med vennlig hilsen ======================================================================= Thomas Dreibholz Simula@OsloMet -- Simula Metropolitan Centre for Digital Engineering Centre for Resilient Networks and Applications Pilestredet 52 0167 Oslo, Norway ----------------------------------------------------------------------- E-Mail: dre...@simula.no Homepage: http://simula.no/people/dreibh =======================================================================
Thu Nov 7 10:01:01 CET 2024 debian:buster: [34mUsing /usr/bin/printf: 1024.0 KiB[0m Version: 5.0-4 BASH_VERSION=5.0.3(1)-release [34mBefore update, built-in: 1024.0 KiB[0m Version: 5.0-4 BASH_VERSION=5.0.3(1)-release [34mAfter update, built-in: 1024.0 KiB[0m debian:bullseye: [34mUsing /usr/bin/printf: 1024.0 KiB[0m Version: 5.1-2+deb11u1 BASH_VERSION=5.1.4(1)-release [34mBefore update, built-in: 1024.0 KiB[0m Version: 5.1-2+deb11u1 BASH_VERSION=5.1.4(1)-release [34mAfter update, built-in: 1024.0 KiB[0m debian:bookworm: [34mUsing /usr/bin/printf: 1024.0 KiB[0m Version: 5.2.15-2+b7 BASH_VERSION=5.2.15(1)-release [34mBefore update, built-in: 1024.0 KiB[0m Version: 5.2.15-2+b7 BASH_VERSION=5.2.15(1)-release [34mAfter update, built-in: 1024.0 KiB[0m debian:trixie: [34mUsing /usr/bin/printf: 1024.0 KiB[0m Version: 5.2.32-1+b1 BASH_VERSION=5.2.32(1)-release [34mBefore update, built-in: -0.0 KiB[0m Version: 5.2.32-1+b2 BASH_VERSION=5.2.32(1)-release [34mAfter update, built-in: -0.0 KiB[0m debian:testing: [34mUsing /usr/bin/printf: 1024.0 KiB[0m Version: 5.2.32-1+b1 BASH_VERSION=5.2.32(1)-release [34mBefore update, built-in: 0.0 KiB[0m Version: 5.2.32-1+b2 BASH_VERSION=5.2.32(1)-release [34mAfter update, built-in: 0.0 KiB[0m debian:unstable: [34mUsing /usr/bin/printf: 1024.0 KiB[0m Version: 5.2.32-1+b1 BASH_VERSION=5.2.32(1)-release [34mBefore update, built-in: -204327741538987132533192794927419046106144370772369067144001965065161242045289853933424603039610742765779999979381059780118475412927505336030961811096942323171738406243205842734782630748596976291469166433050997920003284204949195776429007878596275736935007691106996923972915473612927078576999273496097655501043071338361834078882078850755912931818920827245197726966663326364442031143230223929730810056589847920708690398438582878981441498169074943933218158268054220171747256413622123975399385198219024023879154133208957055720188517989037730247700292212441151723053181805479540138422321518901193531429388391697914548984650050659263509343279372238291953229590280638085794489225096322179406415253680739802310461391940631178627094147814436764904224321712237729546042046381013808394878617794341484407467759616002786242644990565786359712596106210508302861695422729191377824213383173190750221838894807241703259045813812113734202450414375863722081132856553082358143896448018875504894789835664909993069125918608119516460219028656434140753507954328276226808102717499624240036340822278748633780935786387767842590662370878848137752657683466353305033380873137034473631229793757037455575494328649131380303951266324630246038895608219705196789340459774673934620534409754654505623252551511003254543282306879136627285896944333899514928630393550685386623887892526350036451276713129726085073378724023869632307748215719486388502038791993879425283007731845378609284397366110735131007529423033584041742331568321969383362036890245722385471462368193460178823278103440600397719035311516793232021971170491117120486545239563685155925494258633897459583530858457868809252123326413897720653180783379249963882999646794065365421092617696672652070703223121221933355173866517595190957481959632549355709934287240731044302396098427712762987314912897350396994796943345559425463146196003127246474766133319122050720327297331744524683642367411827228986043022871130034411727952227847162767191689360316920174140564370979343486297477402561201772205138893931592891550731825484086698877654849718595250433542794597831402478062044535617274599917782406776947010222982874871389854489126680079162145985872908680895006045926955835727916233200168057787240797752348729518111824111971812951577295894777341595485679757788524109836286560800774285814395351112028524640210278165712295769487836641998996568313589105317326891165523740448496282539661228896877691215539542073347635952152437513125744459988637405842023578832505895923793320691183959876159061608746446540235535743570530692569413998241994113156662245409896797096799376844893973759621776611095550539771065613296703858958259837628226547704878683546514137412726517009503687868465082676950993018601549711109657790786056040174171112959598753683052475890866489757681955183265039162928612396045574719715260928635012789180251222880930062253141307068891177056798915610938812369470261902721292831934314556953106930501025989939346030097900961037306661237282296284276777604904721867765652753619310266959362683077382550736293701594869455522727564932607584050529984183341867595240557838637525465908868120039649020868495057512419048777877894280333642668118368059790464967816334079804442779052559258721941505968634797064829642281945522559700562453855731142765990125815174068147882825107806095531805142335116674861232859324496114044426228750583914151685405393205511963711998047938742639034885470885873543234370262032419214032166155317313030107223332970437931622336172375819192552721620372377889586230667197992343336769352639533278484975632249218742194256435382397869147716116108208281952343710429880230017251959685618826680991287542303797152056404668330905306101552706364637184.0 KiB[0m Version: 5.2.32-1+b2 BASH_VERSION=5.2.32(1)-release [34mAfter update, built-in: -204327741538987132533192794927419046106144370772369067144001965065161242045289853933424603039610742765779999979381059780118475412927505336030961811096942323171738406243205842734782630748596976291469166433050997920003284204949195776429007878596275736935007691106996923972915473612927078576999273496097655501043071338361834078882078850755912931818920827245197726966663326364442031143230223929730810056589847920708690398438582878981441498169074943933218158268054220171747256413622123975399385198219024023879154133208957055720188517989037730247700292212441151723053181805479540138422321518901193531429388391697914548984650050659263509343279372238291953229590280638085794489225096322179406415253680739802310461391940631178627094147814436764904224321712237729546042046381013808394878617794341484407467759616002786242644990565786359712596106210508302861695422729191377824213383173190750221838894807241703259045813812113734202450414375863722081132856553082358143896448018875504894789835664909993069125918608119516460219028656434140753507954328276226808102717499624240036340822278748633780935786387767842590662370878848137752657683466353305033380873137034473631229793757037455575494328649131380303951266324630246038895608219705196789340459774673934620534409754654505623252551511003254543282306879136627285896944333899514928630393550685386623887892526350036451276713129726085073378724023869632307748215719486388502038791993879425283007731845378609284397366110735131007529423033584041742331568321969383362036890245722385471462368193460178823278103440600397719035311516793232021971170491117120486545239563685155925494258633897459583530858457868809252123326413897720653180783379249963882999646794065365421092617696672652070703223121221933355173866517595190957481959632549355709934287240731044302396098427712762987314912897350396994796943345559425463146196003127246474766133319122050720327297331744524683642367411827228986043022871130034411727952227847162767191689360316920174140564370979343486297477402561201772205138893931592891550731825484086698877654849718595250433542794597831402478062044535617274599917782406776947010222982874871389854489126680079162145985872908680895006045926955835727916233200168057787240797752348729518111824111971812951577295894777341595485679757788524109836286560800774285814395351112028524640210278165712295769487836641998996568313589105317326891165523740448496282539661228896877691215539542073347635952152437513125744459988637405842023578832505895923793320691183959876159061608746446540235535743570530692569413998241994113156662245409896797096799376844893973759621776611095550539771065613296703858958259837628226547704878683546514137412726517009503687868465082676950993018601549711109657790786056040174171112959598753683052475890866489757681955183265039162928612396045574719715260928635012789180251222880930062253141307068891177056798915610938812369470261902721292831934314556953106930501025989939346030097900961037306661237282296284276777604904721867765652753619310266959362683077382550736293701594869455522727564932607584050529984183341867595240557838637525465908868120039649020868495057512419048777877894280333642668118368059790464967816334079804442779052559258721941505968634797064829642281945522559700562453855731142765990125815174068147882825107806095531805142335116674861232859324496114044426228750583914151685405393205511963711998047938742639034885470885873543234370262032419214032166155317313030107223332970437931622336172375819192552721620372377889586230667197992343336769352639533278484975632249218742194256435382397869147716116108208281952343710429880230017251959685618826680991287542303797152056404668330905306101552706364637184.0 KiB[0m ubuntu:trusty: [34mUsing /usr/bin/printf: 1024.0 KiB[0m Version: 4.3-7ubuntu1.7 BASH_VERSION=4.3.11(1)-release [34mBefore update, built-in: 1024.0 KiB[0m Version: 4.3-7ubuntu1.7 BASH_VERSION=4.3.11(1)-release [34mAfter update, built-in: 1024.0 KiB[0m ubuntu:bionic: [34mUsing /usr/bin/printf: 1024.0 KiB[0m Version: 4.4.18-2ubuntu1.3 BASH_VERSION=4.4.20(1)-release [34mBefore update, built-in: 1024.0 KiB[0m Version: 4.4.18-2ubuntu1.3 BASH_VERSION=4.4.20(1)-release [34mAfter update, built-in: 1024.0 KiB[0m ubuntu:jammy: [34mUsing /usr/bin/printf: 1024.0 KiB[0m Version: 5.1-6ubuntu1.1 BASH_VERSION=5.1.16(1)-release [34mBefore update, built-in: 1024.0 KiB[0m Version: 5.1-6ubuntu1.1 BASH_VERSION=5.1.16(1)-release [34mAfter update, built-in: 1024.0 KiB[0m ubuntu:noble: [34mUsing /usr/bin/printf: 1024.0 KiB[0m Version: 5.2.21-2ubuntu4 BASH_VERSION=5.2.21(1)-release [34mBefore update, built-in: 1024.0 KiB[0m Version: 5.2.21-2ubuntu4 BASH_VERSION=5.2.21(1)-release [34mAfter update, built-in: 1024.0 KiB[0m ubuntu:oracular: [34mUsing /usr/bin/printf: 1024.0 KiB[0m Version: 5.2.32-1ubuntu1 BASH_VERSION=5.2.32(1)-release [34mBefore update, built-in: nan KiB[0m Version: 5.2.32-1ubuntu1 BASH_VERSION=5.2.32(1)-release [34mAfter update, built-in: nan KiB[0m
#!/bin/bash
LC_ALL=C.UTF-8 date
for d in \
debian:buster \
debian:bullseye \
debian:bookworm \
debian:trixie \
debian:testing \
debian:unstable \
ubuntu:trusty \
ubuntu:bionic \
ubuntu:jammy \
ubuntu:noble \
ubuntu:oracular \
; do
docker run --rm -it ${d} bash -c "
echo -e \"\\n$d:\" ; \
/usr/bin/printf \"\\e[34mUsing /usr/bin/printf: \\t%'5.1f KiB\\e[0m\\n\" 1024
dpkg -s bash | grep '^Version:' && \
echo \"BASH_VERSION=\${BASH_VERSION}\" && \
printf \"\\e[34mBefore update, built-in:\\t%'5.1f KiB\\e[0m\\n\" 1024
apt-get update >/dev/null 2>&1 && \
apt-get install -y bash >/dev/null 2>&1 && \
dpkg -s bash | grep '^Version:' && \
echo \"BASH_VERSION=\${BASH_VERSION}\" && \
printf \"\\e[34mAfter update, built-in: \\t%'5.1f KiB\\e[0m\\n\" 1024
"
done
OpenPGP_signature.asc
Description: OpenPGP digital signature
