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File _service:tar_scm:backport-json-do-something-remotely-reasonable-when-we-see-Na.patch of Package systemd
From 06444b314b863facdb173f10f2d1ff11196755d2 Mon Sep 17 00:00:00 2001 From: Lennart Poettering <lennart@poettering.net> Date: Tue, 26 Oct 2021 15:45:49 +0200 Subject: [PATCH] json: do something remotely reasonable when we see NaN/infinity JSON doesn't have NaN/infinity/-infinity concepts in the spec. Implementations vary what they do with it. JSON5 + Python simply generate special words "NAN" and "Inifinity" from it. Others generate "null" for it. At this point we never actually want to output this, so let's be conservative and generate RFC compliant JSON, i.e. convert to null. One day should JSON5 actually become a thing we can revisit this, but in that case we should implement things via a flag, and only optinally process nan/infinity/-infinity. This patch is extremely simple: whenever accepting a nan/infinity/-infinity from outside it converts it to NULL. I.e. we convert on input, not output. (cherry picked from commit 8f1daefce6e952f2fad9510e5101b5fc675d363f) Conflict:NA Reference:https://github.com/systemd/systemd/commit/06444b314b863facdb173f10f2d1ff11196755d2 --- src/shared/json.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/src/shared/json.c b/src/shared/json.c index c52460a3ec..d72b1e3a38 100644 --- a/src/shared/json.c +++ b/src/shared/json.c @@ -359,6 +359,12 @@ int json_variant_new_real(JsonVariant **ret, long double d) { } REENABLE_WARNING; + /* JSON doesn't know NaN, +Infinity or -Infinity. Let's silently convert to 'null'. */ + if (isnan(d) || isinf(d)) { + *ret = JSON_VARIANT_MAGIC_NULL; + return 0; + } + r = json_variant_new(&v, JSON_VARIANT_REAL, sizeof(d)); if (r < 0) return r; -- 2.33.0
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