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exec-util: handle putenv() errors
Just paranoia, as putenv() can fail and we should catch it, like we catch all other errors. Follow-up for #10073
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@ -102,7 +102,8 @@ static int do_execute(
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alarm(DIV_ROUND_UP(timeout, USEC_PER_SEC));
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STRV_FOREACH(e, envp)
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putenv(*e);
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if (putenv(*e) < 0)
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return log_error_errno(errno, "Failed to set environment variable: %m");
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STRV_FOREACH(path, paths) {
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_cleanup_free_ char *t = NULL;
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