diff options
| author | Vadim Yanitskiy <axilirator@gmail.com> | 2019-11-21 02:20:11 +0700 |
|---|---|---|
| committer | Vadim Yanitskiy <axilirator@gmail.com> | 2019-11-21 10:48:30 +0700 |
| commit | b639b4d4f7f3d51c50dd687a38690c57ba20dced (patch) | |
| tree | 22d9f9e53206c84fa99c6097d272aef3c0f04969 /src/vty/vty.c | |
| parent | 4abda9ea26403e24b2d91b83a1e4c81f5fb4b003 (diff) | |
logging/vty: fix vty_read_file(): do not write warnings to stdin
Setting vty->fd to 0 is a bad idea, which may cause the process
to write() warnings to its own _stdin_ (yes, it's possible).
For example, when a configuration file contains deprecated
logging commands. Let's use stderr by default.
Change-Id: Icdeaea67a06da3a2f07b252e455629559ecc1829
Diffstat (limited to 'src/vty/vty.c')
| -rw-r--r-- | src/vty/vty.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/vty/vty.c b/src/vty/vty.c index babe0ef6..3357d5a7 100644 --- a/src/vty/vty.c +++ b/src/vty/vty.c @@ -1468,11 +1468,15 @@ vty_read_file(FILE *confp, void *priv) struct vty *vty; vty = vty_new(); - vty->fd = 0; vty->type = VTY_FILE; vty->node = CONFIG_NODE; vty->priv = priv; + /* By default, write to stderr. Otherwise, during parsing of the logging + * configuration, all invocations to vty_out() would make the process + * write() to its own stdin (fd=0)! */ + vty->fd = fileno(stderr); + ret = config_from_file(vty, confp); if (ret != CMD_SUCCESS) { |