linenoise: error code distinguishes interrupt from eof.

In this commit, we introduce a persistent error
variable stored in the lino_t structure, and
functions to access it.

* linenoise/linenoise.c (struct lino_state): New
member, error.
(enable_raw_mode): Don't set errno to ENOTTY;
set linenoise error to lino_notty.
(complete_line, edit, go_raw, linenoise, lino_hist_save,
lino_hist_load):  Set linenoise error before returning -1.
(lino_get_error, lino_set_error): New functions.

* linenoise/linenoise.h (enum lino_error, lino_error_t):
New enum.
(lino_get_error, lino_set_error): Declared.

0 files changed, 0 insertions, 0 deletions