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authorDenys Vlasenko <vda.linux@googlemail.com>2017-07-26 20:06:48 +0200
committerDenys Vlasenko <vda.linux@googlemail.com>2017-07-26 20:33:51 +0200
commitd04fc712e30b681117afaad490fec2a747b390c6 (patch)
tree6b60ab1de6c02dcb1d85bfd49923443a0a25da7c /shell/ash_test/ash-misc/local2.right
parent85241c7b0b4558f405f7e633ad62520299b8396d (diff)
downloadbusybox-d04fc712e30b681117afaad490fec2a747b390c6.tar.gz
ash: [VAR] Fix loss of variables when hash collides
Upstream commit: Date: Tue, 6 Jul 2010 17:40:53 +0800 [VAR] Fix loss of variables when hash collides Brian Koropoff reported that the new var patches broke the following script: #!/bin/dash GDM_LANG="bar" OPTION="foo" unset GDM_LANG # OPTION has mysteriously become unset echo "$OPTION" He correctly diagnosed this as a result of removing all variables in the hash chain preceding the one that should be removed in setvareq. He also provided a patch to fix this. This patch is based on his but without keeping the original vpp. As a result, we now store new variables at the end of the hash chain instead of the beginning. To make this work, setvareq/setvar now returns the vp pointer modified. In case they're used to unset a variable the pointer returned is undefined. This is because mklocal needs it and used to get it by assuming that the new variable always appear at the beginning of the chain. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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