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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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10
procps/powertop.c
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@@ -683,7 +683,6 @@ int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv)
ullong cur_duration[MAX_CSTATE_COUNT];
char cstate_lines[MAX_CSTATE_COUNT + 2][64];
#if ENABLE_FEATURE_USE_TERMIOS
struct termios new_settings;
struct pollfd pfd[1];
pfd[0].fd = 0;
@@ -707,14 +706,11 @@ int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv)
puts("Collecting data for "DEFAULT_SLEEP_STR" seconds");
#if ENABLE_FEATURE_USE_TERMIOS
tcgetattr(0, (void *)&G.init_settings);
memcpy(&new_settings, &G.init_settings, sizeof(new_settings));
/* Turn on unbuffered input, turn off echoing */
new_settings.c_lflag &= ~(ISIG | ICANON | ECHO | ECHONL);
/* Turn on unbuffered input; turn off echoing, ^C ^Z etc */
set_termios_to_raw(STDIN_FILENO, &G.init_settings, TERMIOS_CLEAR_ISIG);
bb_signals(BB_FATAL_SIGS, sig_handler);
/* So we don't forget to reset term settings */
atexit(reset_term);
bb_signals(BB_FATAL_SIGS, sig_handler);
tcsetattr_stdin_TCSANOW(&new_settings);
#endif
/* Collect initial data */