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logv: preserve errno.

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Logging often gets called in error paths, so this is just good hygiene.
Also, log_io does this already.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2018-02-05 14:39:27 +10:30
parent 4130a47f5b
commit c076534220
1 changed files with 2 additions and 0 deletions
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2
lightningd/log.c
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@@ -232,6 +232,7 @@ static struct log_entry *new_log_entry(struct log *log, enum log_level level)
void logv(struct log *log, enum log_level level, const char *fmt, va_list ap)
{
int save_errno = errno;
struct log_entry *l = new_log_entry(log, level);
l->log = tal_vfmt(l, fmt, ap);
@@ -241,6 +242,7 @@ void logv(struct log *log, enum log_level level, const char *fmt, va_list ap)
log->lr->print_arg);
add_entry(log, l);
errno = save_errno;
}
void log_io(struct log *log, bool in, const void *data, size_t len)