dennis wrote: > Configuration Information [Automatically generated, do not change]: > Machine: i486OS: linux-gnuCompiler: gccCompilation CFLAGS: > -DPROGRAM='bash' -DCONF_HOSTTYPE='i486' -DCONF_OSTYPE='linux-gnu' > -DCONF_MACHTYPE='i486-pc-linux-gnu' -DCONF_VENDOR='pc' > -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash' -DSHELL -DHAVE_CONFIG_H > -I. -I../bash -I../bash/include -I../bash/lib -g -O2 -Walluname output: > Linux emperor 2.6.28-11-generic #42-Ubuntu SMP Fri Apr 17 01:57:59 UTC 2009 > i686 GNU/LinuxMachine Type: i486-pc-linux-gnu > Bash Version: 3.2Patch Level: 48Release Status: release > Description: > (Also reproduced in bash 4.0.16(1)-release on Fedora 11 when > HISTCONTROL=ignorespace.) > In a script that I developed which adds comments to the ends ofbash > history entries, if the entry contains a newline, history -s givesdifferent > results than if the entry does not contain a newline. > Specifically, the entry is duplicated (with comment added) when > there's a newline. The expected behavior is that the existing entry would > be replaced by the comment-appended version as it correctly is when there's > no newline. > I have attached a test script below which duplicates the > pertinentparts of my script, leaves out what isn't applicable to this > problem, and includes various features to aid in reproducing the problem. > It also includes further details of this issue.
This is the result of an interaction between compound or multiline commands, command-oriented history, and history -s. history -s will not delete the previous history entry before pushing the new entry if it's added to a previous entry as part of a compound command. Otherwise, history -s used within a compound command will remove the entire compound command from the history list. This seems to be an unusual case; I'm not inclined to change the current behavior. Better to have an extra command in the history than delete them inadvertently. Chet -- ``The lyf so short, the craft so long to lerne.'' - Chaucer Chet Ramey, ITS, CWRU c...@case.edu http://cnswww.cns.cwru.edu/~chet/
