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Avoid NULL pointer to vsnprintf()

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GLIBC is friendly enough to check for NULL and replace segfault with
"(null)", but other C-libs may not handle it as gracefully.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
This commit is contained in:
Joachim Wiberg 2021-11-22 04:27:18 +01:00
parent 558caf1a10
commit 1018d4a7f4
1 changed files with 6 additions and 3 deletions
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7
src/syslogd.c
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@ -1699,8 +1699,11 @@ void fprintlog_write(struct filed *f, struct iovec *iov, int iovcnt, int flags)
}
#define fmtlogit(bm) logit("%s(%d, 0x%02x, %s, %s, %s, %s, %s, %s)", __func__, \
bm->pri, bm->flags, bm->hostname, bm->app_name, \
bm->proc_id, bm->msgid, bm->sd, bm->msg)
bm->pri, bm->flags, bm->hostname ? bm->hostname : "-", \
bm->app_name ? bm->app_name : "-", \
bm->proc_id ? bm->proc_id : "-", \
bm->msgid ? bm->msgid : "-", \
bm->sd ? bm->sd : "-", bm->msg ? bm->msg : "-")
static int fmt3164(struct buf_msg *buffer, char *fmt, struct iovec *iov, size_t iovmax)
{