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libbb: consolidate the code to set termios unbuffered mode

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function                                             old     new   delta
set_termios_to_raw                                     -     116    +116
count_lines                                           72      74      +2
powertop_main                                       1458    1430     -28
top_main                                             943     914     -29
more_main                                            759     714     -45
fsck_minix_main                                     2969    2921     -48
conspy_main                                         1197    1135     -62
rawmode                                               99      36     -63
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/6 up/down: 118/-275)         Total: -157 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2017-01-11 16:17:59 +01:00
parent 8944c67b1f
commit 01ccdd1d3c
15 changed files with 71 additions and 55 deletions
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15
editors/vi.c
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@@ -354,7 +354,7 @@ struct globals {
#if ENABLE_FEATURE_VI_USE_SIGNALS
sigjmp_buf restart; // catch_sig()
#endif
struct termios term_orig, term_vi; // remember what the cooked mode was
struct termios term_orig; // remember what the cooked mode was
#if ENABLE_FEATURE_VI_COLON
char *initial_cmds[3]; // currently 2 entries, NULL terminated
#endif
@@ -462,7 +462,6 @@ struct globals {
#define context_end (G.context_end )
#define restart (G.restart )
#define term_orig (G.term_orig )
#define term_vi (G.term_vi )
#define initial_cmds (G.initial_cmds )
#define readbuffer (G.readbuffer )
#define scr_out_buf (G.scr_out_buf )
@@ -2731,15 +2730,9 @@ static char *swap_context(char *p) // goto new context for '' command make this
//----- Set terminal attributes --------------------------------
static void rawmode(void)
{
tcgetattr(0, &term_orig);
term_vi = term_orig;
term_vi.c_lflag &= (~ICANON & ~ECHO); // leave ISIG on - allow intr's
term_vi.c_iflag &= (~IXON & ~ICRNL);
term_vi.c_oflag &= (~ONLCR);
term_vi.c_cc[VMIN] = 1;
term_vi.c_cc[VTIME] = 0;
erase_char = term_vi.c_cc[VERASE];
tcsetattr_stdin_TCSANOW(&term_vi);
// no TERMIOS_CLEAR_ISIG: leave ISIG on - allow signals
set_termios_to_raw(STDIN_FILENO, &term_orig, TERMIOS_RAW_CRNL);
erase_char = term_orig.c_cc[VERASE];
}
static void cookmode(void)