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* environ.cc (build_env): When merging the user's Windows environment,

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explicitely skip the variables needing conversion to avoid collisions.
	Extend comment to explain.
This commit is contained in:
Corinna Vinschen 2015-01-14 10:31:14 +00:00
parent f91272b8c2
commit 63716e7d42
2 changed files with 25 additions and 3 deletions
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6
winsup/cygwin/ChangeLog
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@ -1,3 +1,9 @@
2015-01-14 Corinna Vinschen <corinna@vinschen.de>
* environ.cc (build_env): When merging the user's Windows environment,
explicitely skip the variables needing conversion to avoid collisions.
Extend comment to explain.
2015-01-13 Corinna Vinschen <corinna@vinschen.de>
* uinfo.cc (pwdgrp::fetch_account_from_windows): Drop code from

22
winsup/cygwin/environ.cc
View File

@ -1071,9 +1071,11 @@ build_env (const char * const *envp, PWCHAR &envblock, int &envc,
sys_wcstombs_alloc (&winenv[winnum], HEAP_NOTHEAP, var);
}
DestroyEnvironmentBlock (cwinenv);
/* Eliminate variables which are already available in envp. The windows
env is sorted, so we can use bsearch. We're doing this first step,
so the following code doesn't allocate too much memory. */
/* Eliminate variables which are already available in envp, as well as
the small set of crucial variables needing POSIX conversion and
potentially collide. The windows env is sorted, so we can use
bsearch. We're doing this first step, so the following code doesn't
allocate too much memory. */
if (winenv)
{
for (srcp = envp; *srcp; srcp++)
@ -1091,6 +1093,20 @@ build_env (const char * const *envp, PWCHAR &envblock, int &envc,
--winnum;
}
}
for (char **elem = winenv; *elem; elem++)
{
if (match_first_char (*elem, WC))
for (int i = 0; conv_envvars[i].name != NULL; i++)
if (strncmp (*elem, conv_envvars[i].name,
conv_envvars[i].namelen) == 0)
{
free (*elem);
memmove (elem, elem + 1,
(winnum - (elem - winenv)) * sizeof *elem);
--winnum;
--elem;
}
}
}
}