Date: Sat, 17 Feb 1996 20:56:16 +0200 (SAT) From: Mark Murray <mark@grondar.za> To: FreeBSD-gnats-submit@freebsd.org Subject: bin/1030: /bin/sh does not pass environment variables on properly Message-ID: <199602171856.UAA13002@grumble.grondar.za> Resent-Message-ID: <199602171900.LAA23168@freefall.freebsd.org>
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>Number: 1030
>Category: bin
>Synopsis: /bin/sh does not pass environment variables on properly
>Confidential: no
>Severity: serious
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sat Feb 17 11:00:01 PST 1996
>Last-Modified:
>Originator: Mark Murray
>Organization:
GTA
>Release: FreeBSD 2.2-CURRENT i386
>Environment:
FreeBSD 2.0.5 through -Current (maybe more)
>Description:
Environment variables created "on the fly" are not properly passed
through to compiled code, although subshells seem able to get to them.
This may be a bug in getenv(3).
The following operationg systems do NOT have the problem:
BSDI HP-UX IRIX Linux OSF1 SunOS4 SunOS5 ULTRIX
>How-To-Repeat:
Run the following script:
------------------------------8<-test1----------------------------
#! /bin/sh
echo "-- Shell version"
(echo FOO=/bar/baz ; echo "echo FOO is \$FOO") | /bin/sh -ax
echo "-- Shell version with export"
(echo export FOO=/bar/baz ; echo "echo FOO is \$FOO") | /bin/sh -ax
echo "-- C version"
(echo FOO=/bar/baz ; echo "./env") | /bin/sh -ax
echo "-- C version with export"
(echo export FOO=/bar/baz ; echo "./env") | /bin/sh -ax
------------------------------8<-----------------------------
...where "env" is compiled from this C code:
------------------------------8<-env.c----------------------------
#include <stdlib.h>
#include <stdio.h>
void main(void)
{
char *foo;
foo = getenv("FOO");
if (foo) printf("FOO is %s\n", foo);
else printf("FOO does not exist!\n");
}
------------------------------8<-----------------------------
... and here is a script of a run:
------------------------------8<-run----------------------------
Script started on Sat Feb 17 20:36:45 1996
bash$ ./test1
-- Shell version
+ FOO=/bar/baz
+ echo FOO is /bar/baz
FOO is /bar/baz
-- Shell version with export
+ export FOO=/bar/baz
+ echo FOO is /bar/baz
FOO is /bar/baz
-- C version
+ FOO=/bar/baz
+ ./env
FOO does not exist! <----------Lookee here - env did not get the var!
-- C version with export
+ export FOO=/bar/baz
+ ./env
FOO is /bar/baz
bash$ exit
exit
Script done on Sat Feb 17 20:36:53 1996
------------------------------8<-----------------------------
>Fix:
Use bash :-). Bash does not have this problem.
>Audit-Trail:
>Unformatted:
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