Apple-2gs-SW/hush
1
0
Fork 0
mirror of https://github.com/sheumann/hush.git synced 2024-12-22 14:30:31 +00:00
Code Issues Projects Releases Wiki Activity

vi: explain why reading 4 chars is unsafe

Browse Source
This commit is contained in:
Denis Vlasenko 2008-10-18 19:37:41 +00:00
parent 3ab3d8a5cf
commit e3742f4217
1 changed files with 5 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
editors/vi.c
View File

@ -2243,9 +2243,11 @@ static char readit(void) // read (maybe cursor) key from stdin
n = chars_to_parse; n = chars_to_parse;
if (n == 0) { if (n == 0) {
// If no data, block waiting for input // If no data, block waiting for input.
// (can't read more than minimal ESC sequence - // Can't read more than minimal ESC sequence size -
// see "n = 0" below). // see "n = 0" below. Example of mishandled
// sequence if we read 4 chars here: "ESC O A ESC O A".
// We'll read "ESC O A ESC" and lose second ESC!
n = safe_read(0, readbuffer, 3); n = safe_read(0, readbuffer, 3);
if (n <= 0) { if (n <= 0) {
error: error: