Package: bash Version: 4.1-3 Severity: normal Despite what manual (and common knowledge/sources) say, bash'es "source" builtin command does not seem to be fully equivalent to "." builtin command. This shows when regarding the "export" of a variable to environment, in a sourced subprogram. In normal interactive post-login terminal usage (both A and B examples), it works fine:
-- START terminal A: pawel@debiann:~$ cat test.sh T1=1 export T2=2 pawel@debiann:~$ echo $T1 $T2 pawel@debiann:~$ . ./test.sh pawel@debiann:~$ echo $T1 $T2 1 2 pawel@debiann:~$ bash pawel@debiann:~$ echo $T1 $T2 2 pawel@debiann:~$ -- STOP terminal A -- START terminal B: pawel@debiann:~$ cat test.sh T1=1 export T2=2 pawel@debiann:~$ echo $T1 $T2 pawel@debiann:~$ source ./test.sh pawel@debiann:~$ echo $T1 $T2 1 2 pawel@debiann:~$ bash pawel@debiann:~$ echo $T1 $T2 2 -- STOP terminal B: However, when "." and "source" are used in ".bash_profile" each works differently. When runnning a sub-script, which uses "export" it works differently, depending on whether "." (example C) or "source" (example D) is used. -- START example C pawel@debiann:~$ cat .bash_profile .. /u01/app/oracle/product/11.2.0/xe/bin/oracle_env.sh pawel@debiann:~$ cat /u01/app/oracle/product/11.2.0/xe/bin/oracle_env.sh export ORACLE_HOME=/u01/app/oracle/product/11.2.0/xe -- STOP example C -- START example D pawel@debiann:~$ cat .bash_profile source /u01/app/oracle/product/11.2.0/xe/bin/oracle_env.sh pawel@debiann:~$ cat /u01/app/oracle/product/11.2.0/xe/bin/oracle_env.sh export ORACLE_HOME=/u01/app/oracle/product/11.2.0/xe -- STOP example D In a system booted using example C, for every later interactive terminal (in my case "gnome-terminal" , with /bin/bash), the variable "ORACLE_HOME" will be set with the above value. In example D, "ORACLE_HOME" will be empty/unset/unavailable in the exported environment. -- System Information: Debian Release: 6.0.3 APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 2.6.32-5-amd64 (SMP w/4 CPU cores) Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Versions of packages bash depends on: ii base-files 6.0squeeze3 Debian base system miscellaneous f ii dash 0.5.5.1-7.4 POSIX-compliant shell ii debianutils 3.4 Miscellaneous utilities specific t ii libc6 2.11.2-10 Embedded GNU C Library: Shared lib ii libncurses5 5.7+20100313-5 shared libraries for terminal hand Versions of packages bash recommends: ii bash-completion 1:1.2-3 programmable completion for the ba Versions of packages bash suggests: pn bash-doc <none> (no description available) -- no debconf information -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
