Commit Graph

3 Commits

Author SHA1 Message Date
Ivan Grokhotkov
4d42b5ea24 console: handle empty input to esp_console_run correctly
Fixes https://github.com/espressif/esp-idf/issues/1067

Ref. TW15752
2017-10-13 07:14:53 +08:00
Ivan Grokhotkov
0ed64da963 console: initialize buf_size before calling open_memstream
POSIX open_memstream documentation [1] does not mention that it may use
the  value supplied in buf_size before the call.
newlib implementation of open_memstream does use it as a hint of the
buffer size [2]. To avoid using potential garbage in this variable,
newlib caps the size to 64kB (!).

If the allocation of this initial buffer fails, NULL file pointer is
returned. Previous code did not check returned file pointer and crashed
when it was used.

Initialize size to zero (in which case newlib allocates a 64 byte
buffer), and check the returned file pointer.

[1] http://pubs.opengroup.org/onlinepubs/9699919799/functions/open_memstream.html
[2] https://github.com/espressif/newlib-esp32/blob/23c0f21/newlib/libc/stdio/open_memstream.c#L26-L29
    https://github.com/espressif/newlib-esp32/blob/23c0f21/newlib/libc/stdio/open_memstream.c#L324-L336
2017-08-23 01:10:30 +08:00
Ivan Grokhotkov
5de7c91a54 add console component and example 2017-08-21 15:58:27 +08:00