46 lines
1.4 KiB
Diff
46 lines
1.4 KiB
Diff
From 2b32735af480055e27400068d27364d521071117 Mon Sep 17 00:00:00 2001
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From: "Richard W.M. Jones" <rjones@redhat.com>
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Date: Mon, 24 Sep 2012 17:35:47 +0100
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Subject: [PATCH 2/2] command: Change virCommandAddEnv so it replaces existing
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environment variables.
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---
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src/util/command.c | 17 ++++++++++++++++-
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1 file changed, 16 insertions(+), 1 deletion(-)
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diff --git a/src/util/command.c b/src/util/command.c
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index f7d92dd..1adf7b9 100644
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--- a/src/util/command.c
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+++ b/src/util/command.c
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@@ -985,11 +985,26 @@ virCommandNonblockingFDs(virCommandPtr cmd)
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}
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/* Add an environment variable to the cmd->env list. 'env' is a
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- * string like "name=value".
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+ * string like "name=value". If the named environment variable is
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+ * already set, then it is replaced in the list.
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*/
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static inline void
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virCommandAddEnv(virCommandPtr cmd, char *env)
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{
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+ size_t namelen;
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+ size_t i;
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+
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+ /* Search for the name in the existing environment. */
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+ namelen = strcspn(env, "=");
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+ for (i = 0; i < cmd->nenv; ++i) {
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+ /* + 1 because we want to match the '=' character too. */
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+ if (STREQLEN(cmd->env[i], env, namelen + 1)) {
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+ VIR_FREE(cmd->env[i]);
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+ cmd->env[i] = env;
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+ return;
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+ }
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+ }
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+
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/* Arg plus trailing NULL. */
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if (VIR_RESIZE_N(cmd->env, cmd->maxenv, cmd->nenv, 1 + 1) < 0) {
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VIR_FREE(env);
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--
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1.7.10.4
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