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Prefer the first, not last, of any env var duplicates

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If envp contains duplicate environment variables, use the
first value, not the last value. Fixes #2784.
This commit is contained in:
ridiculousfish 2016-03-05 19:02:50 -08:00
parent 1e7c3fe709
commit 3044697baa
1 changed files with 9 additions and 5 deletions
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14
src/env.cpp
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@ -449,12 +449,16 @@ void env_init(const struct config_paths_t *paths /* or NULL */)
is to insert valid data
*/
/*
Import environment variables
*/
for (char **p = (environ ? environ : __environ); p && *p; p++)
/* Import environment variables. Walk backwards so that the first one out of any duplicates wins (#2784) */
const char * const * envp = (environ ? environ : __environ);
size_t i = 0;
while (envp && envp[i])
{
const wcstring key_and_val = str2wcstring(*p); //like foo=bar
i++;
}
while (i--)
{
const wcstring key_and_val = str2wcstring(envp[i]); //like foo=bar
size_t eql = key_and_val.find(L'=');
if (eql == wcstring::npos)
{