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common/utils: introduce tmpdir_mkstemp; use it

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Various unit tests were creating temporary files unconditionally in /tmp
and were not cleaning up after themselves. Introduce a new variant of
mkstemp(3p) that respects the TMPDIR environment variable, and use it in
the offending unit tests. This allows each test run to use a dedicated
TMPDIR that can be cleaned up after the run.

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Signed-off-by: Matt Whitlock <c-lightning@mattwhitlock.name>
This commit is contained in:
Matt Whitlock
2021-12-05 02:47:38 -05:00
committed by Rusty Russell
parent 5284ee4dae
commit 1f79aad830
8 changed files with 38 additions and 12 deletions
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5
common/test/run-route-specific.c
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@@ -13,6 +13,7 @@
#include <common/route.h>
#include <common/setup.h>
#include <common/type_to_string.h>
#include <common/utils.h>
#include <bitcoin/chainparams.h>
#include <stdio.h>
#include <wire/peer_wiregen.h>
@@ -185,7 +186,7 @@ int main(int argc, char *argv[])
struct gossmap *gossmap;
const double riskfactor = 1.0;
char gossip_version = GOSSIP_STORE_VERSION;
char gossipfilename[] = "/tmp/run-route-specific-gossipstore.XXXXXX";
char *gossipfilename;
common_setup(argv[0]);
node_id_from_hexstr("03c173897878996287a8100469f954dd820fcd8941daed91c327f168f3329be0bf",
@@ -203,7 +204,7 @@ int main(int argc, char *argv[])
chainparams = chainparams_for_network("regtest");
store_fd = mkstemp(gossipfilename);
store_fd = tmpdir_mkstemp(tmpctx, "run-route-specific-gossipstore.XXXXXX", &gossipfilename);
assert(write(store_fd, &gossip_version, sizeof(gossip_version))
== sizeof(gossip_version));