diff options
| -rw-r--r-- | libbb/lineedit.c | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/libbb/lineedit.c b/libbb/lineedit.c index 3905b8cc4..a62ab6d29 100644 --- a/libbb/lineedit.c +++ b/libbb/lineedit.c @@ -149,6 +149,7 @@ struct lineedit_statics { CHAR_T delbuf[DELBUFSIZ]; /* a place to store deleted characters */ #endif #if ENABLE_FEATURE_EDITING_ASK_TERMINAL + smallint unknown_width; smallint sent_ESC_br6n; #endif @@ -1610,14 +1611,16 @@ static void ask_terminal(void) * poll([{fd=0, events=POLLIN}], 1, 4294967295) = 1 ([{fd=0, revents=POLLIN}]) * read(0, "\n", 1) = 1 <-- oh crap, user's input got in first */ - struct pollfd pfd; - - pfd.fd = STDIN_FILENO; - pfd.events = POLLIN; - if (safe_poll(&pfd, 1, 0) == 0) { - S.sent_ESC_br6n = 1; - fputs("\033" "[6n", stdout); - fflush_all(); /* make terminal see it ASAP! */ + if (S.unknown_width) { /* only if window size is not known */ + struct pollfd pfd; + + pfd.fd = STDIN_FILENO; + pfd.events = POLLIN; + if (safe_poll(&pfd, 1, 0) == 0) { + S.sent_ESC_br6n = 1; + fputs("\033" "[6n", stdout); + fflush_all(); /* make terminal see it ASAP! */ + } } } #else @@ -1763,11 +1766,13 @@ static void cmdedit_setwidth(unsigned w, int redraw_flg) static void win_changed(int nsig) { + int sv_errno = errno; unsigned width; - get_terminal_width_height(0, &width, NULL); + IF_FEATURE_EDITING_ASK_TERMINAL(S.unknown_width =) get_terminal_width_height(0, &width, NULL); cmdedit_setwidth(width, nsig /* - just a yes/no flag */); if (nsig == SIGWINCH) signal(SIGWINCH, win_changed); /* rearm ourself */ + errno = sv_errno; } static int lineedit_read_key(char *read_key_buffer) |