*: code shrink by adding a wrapper around very common tcsetattr(0, TCSANOW, xx) op

function                                             old     new   delta
tcsetattr_stdin_TCSANOW                                -      14     +14
set_sane_term                                        116     113      -3
top_main                                            1277    1273      -4
make_new_session                                     421     415      -6
rawmode                                              133     126      -7
reset_term                                            18      10      -8
die                                                   43      35      -8
cookmode                                              62      54      -8
vlock_main                                           425     415     -10
read_line_input                                     3165    3155     -10
bb_askpass                                           357     347     -10
fsck_minix_main                                     3079    3065     -14
getty_main                                          2375    2332     -43
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/12 up/down: 14/-131)         Total: -117 bytes

13 files changed, 34 insertions, 27 deletions

diff --git a/e2fsprogs/old_e2fsprogs/e2fsck.c b/e2fsprogs/old_e2fsprogs/e2fsck.c
index 61a30f487..741536c1c 100644
--- a/e2fsprogs/old_e2fsprogs/e2fsck.c
+++ b/e2fsprogs/old_e2fsprogs/e2fsck.c
@@ -12281,7 +12281,7 @@ static int ask_yn(const char * string, int def)
         tmp.c_lflag &= ~(ICANON | ECHO);
         tmp.c_cc[VMIN] = 1;
         tmp.c_cc[VTIME] = 0;
-        tcsetattr (0, TCSANOW, &tmp);
+        tcsetattr_stdin_TCSANOW(&tmp);
 #endif
 
         if (def == 1)
@@ -12297,7 +12297,7 @@ static int ask_yn(const char * string, int def)
                         break;
                 if (c == 3) {
 #ifdef HAVE_TERMIOS_H
-                        tcsetattr (0, TCSANOW, &termios);
+                        tcsetattr_stdin_TCSANOW(&termios);
 #endif
                         if (e2fsck_global_ctx &&
                             e2fsck_global_ctx->flags & E2F_FLAG_SETJMP_OK) {
@@ -12323,7 +12323,7 @@ static int ask_yn(const char * string, int def)
         else
                 puts ("no\n");
 #ifdef HAVE_TERMIOS_H
-        tcsetattr (0, TCSANOW, &termios);
+        tcsetattr_stdin_TCSANOW(&termios);
 #endif
         return def;
 }
diff --git a/editors/vi.c b/editors/vi.c
index 93e564756..92c069de0 100644
--- a/editors/vi.c
+++ b/editors/vi.c
@@ -2106,13 +2106,13 @@ static void rawmode(void)
         term_vi.c_cc[VMIN] = 1;
         term_vi.c_cc[VTIME] = 0;
         erase_char = term_vi.c_cc[VERASE];
-        tcsetattr(0, TCSANOW, &term_vi);
+        tcsetattr_stdin_TCSANOW(&term_vi);
 }
 
 static void cookmode(void)
 {
         fflush(stdout);
-        tcsetattr(0, TCSANOW, &term_orig);
+        tcsetattr_stdin_TCSANOW(&term_orig);
 }
 
 //----- Come here when we get a window resize signal ---------
diff --git a/include/libbb.h b/include/libbb.h
index 5b6a2dae1..086a59f05 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -1142,6 +1142,8 @@ extern void print_login_prompt(void) FAST_FUNC;
 /* NB: typically you want to pass fd 0, not 1. Think 'applet | grep something' */
 int get_terminal_width_height(int fd, unsigned *width, unsigned *height) FAST_FUNC;
 
+int tcsetattr_stdin_TCSANOW(const struct termios *tp) FAST_FUNC;
+
 /* NB: "unsigned request" is crucial! "int request" will break some arches! */
 int ioctl_or_perror(int fd, unsigned request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5))) FAST_FUNC;
 int ioctl_or_perror_and_die(int fd, unsigned request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5))) FAST_FUNC;
diff --git a/init/init.c b/init/init.c
index ae2dd6a7a..3d171d71f 100644
--- a/init/init.c
+++ b/init/init.c
@@ -261,7 +261,7 @@ static void set_sane_term(void)
         tty.c_lflag =
                 ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE | IEXTEN;
 
-        tcsetattr(STDIN_FILENO, TCSANOW, &tty);
+        tcsetattr_stdin_TCSANOW(&tty);
 }
 
 /* Open the new terminal device.
diff --git a/libbb/bb_askpass.c b/libbb/bb_askpass.c
index fba82a07b..c60ef3708 100644
--- a/libbb/bb_askpass.c
+++ b/libbb/bb_askpass.c
@@ -37,7 +37,7 @@ char* FAST_FUNC bb_askpass(int timeout, const char *prompt)
         tio = oldtio;
         tio.c_iflag &= ~(IUCLC|IXON|IXOFF|IXANY);
         tio.c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|TOSTOP);
-        tcsetattr(STDIN_FILENO, TCSANOW, &tio);
+        tcsetattr_stdin_TCSANOW(&tio);
 
         memset(&sa, 0, sizeof(sa));
         /* sa.sa_flags = 0; - no SA_RESTART! */
@@ -70,7 +70,7 @@ char* FAST_FUNC bb_askpass(int timeout, const char *prompt)
         }
         sigaction_set(SIGINT, &oldsa);
 
-        tcsetattr(STDIN_FILENO, TCSANOW, &oldtio);
+        tcsetattr_stdin_TCSANOW(&oldtio);
         bb_putchar('\n');
         fflush(stdout);
         return ret;
diff --git a/libbb/get_console.c b/libbb/get_console.c
index ad56e740f..74022b543 100644
--- a/libbb/get_console.c
+++ b/libbb/get_console.c
@@ -13,7 +13,6 @@
 /* From <linux/kd.h> */
 enum { KDGKBTYPE = 0x4B33 };  /* get keyboard type */
 
-
 static int open_a_console(const char *fnam)
 {
         int fd;
@@ -37,7 +36,6 @@ static int open_a_console(const char *fnam)
  * We try several things because opening /dev/console will fail
  * if someone else used X (which does a chown on /dev/console).
  */
-
 int FAST_FUNC get_console_fd_or_die(void)
 {
         static const char *const console_names[] = {
diff --git a/libbb/lineedit.c b/libbb/lineedit.c
index 1f21866ca..3953cc904 100644
--- a/libbb/lineedit.c
+++ b/libbb/lineedit.c
@@ -1436,7 +1436,7 @@ int FAST_FUNC read_line_input(const char *prompt, char *command, int maxsize, li
 #define _POSIX_VDISABLE '\0'
 #endif
         new_settings.c_cc[VINTR] = _POSIX_VDISABLE;
-        tcsetattr(STDIN_FILENO, TCSANOW, &new_settings);
+        tcsetattr_stdin_TCSANOW(&new_settings);
 
         /* Now initialize things */
         previous_SIGWINCH_handler = signal(SIGWINCH, win_changed);
@@ -1860,7 +1860,7 @@ int FAST_FUNC read_line_input(const char *prompt, char *command, int maxsize, li
 #endif
 
         /* restore initial_settings */
-        tcsetattr(STDIN_FILENO, TCSANOW, &initial_settings);
+        tcsetattr_stdin_TCSANOW(&initial_settings);
         /* restore SIGWINCH handler */
         signal(SIGWINCH, previous_SIGWINCH_handler);
         fflush(stdout);
diff --git a/libbb/xfuncs.c b/libbb/xfuncs.c
index 8ef305ba0..e2aee136c 100644
--- a/libbb/xfuncs.c
+++ b/libbb/xfuncs.c
@@ -289,3 +289,8 @@ int FAST_FUNC get_terminal_width_height(int fd, unsigned *width, unsigned *heigh
 
         return ret;
 }
+
+int FAST_FUNC tcsetattr_stdin_TCSANOW(const struct termios *tp)
+{
+        return tcsetattr(STDIN_FILENO, TCSANOW, tp);
+}
diff --git a/loginutils/getty.c b/loginutils/getty.c
index 8b0e729fb..0f536888b 100644
--- a/loginutils/getty.c
+++ b/loginutils/getty.c
@@ -279,7 +279,7 @@ static void termios_init(struct termios *tp, int speed, struct options *op)
          */
 #ifdef __linux__
         /* flush input and output queues, important for modems! */
-        ioctl(0, TCFLSH, TCIOFLUSH);
+        ioctl(0, TCFLSH, TCIOFLUSH); /* tcflush(0, TCIOFLUSH)? - same */
 #endif
 
         tp->c_cflag = CS8 | HUPCL | CREAD | speed;
@@ -297,7 +297,7 @@ static void termios_init(struct termios *tp, int speed, struct options *op)
                 tp->c_cflag |= CRTSCTS;
 #endif
 
-        ioctl(0, TCSETS, tp);
+        tcsetattr_stdin_TCSANOW(tp);
 
         debug("term_io 2\n");
 }
@@ -334,7 +334,7 @@ static void auto_baud(char *buf, unsigned size_buf, struct termios *tp)
         tp->c_iflag |= ISTRIP;          /* enable 8th-bit stripping */
         vmin = tp->c_cc[VMIN];
         tp->c_cc[VMIN] = 0;             /* don't block if queue empty */
-        ioctl(0, TCSETS, tp);
+        tcsetattr_stdin_TCSANOW(tp);
 
         /*
          * Wait for a while, then read everything the modem has said so far and
@@ -359,7 +359,7 @@ static void auto_baud(char *buf, unsigned size_buf, struct termios *tp)
         /* Restore terminal settings. Errors will be dealt with later on. */
         tp->c_iflag = iflag;
         tp->c_cc[VMIN] = vmin;
-        ioctl(0, TCSETS, tp);
+        tcsetattr_stdin_TCSANOW(tp);
 }
 
 /* do_prompt - show login prompt, optionally preceded by /etc/issue contents */
@@ -404,7 +404,7 @@ static char *get_logname(char *logname, unsigned size_logname,
 
         /* Flush pending input (esp. after parsing or switching the baud rate). */
         sleep(1);
-        ioctl(0, TCFLSH, TCIFLUSH);
+        ioctl(0, TCFLSH, TCIFLUSH); /* tcflush(0, TCIOFLUSH)? - same */
 
         /* Prompt for and read a login name. */
         logname[0] = '\0';
@@ -552,12 +552,13 @@ static void termios_final(struct options *op, struct termios *tp, struct chardat
         }
 #endif
         /* Optionally enable hardware flow control */
-#ifdef  CRTSCTS
+#ifdef CRTSCTS
         if (op->flags & F_RTSCTS)
                 tp->c_cflag |= CRTSCTS;
 #endif
 
         /* Finally, make the new settings effective */
+        /* It's tcsetattr_stdin_TCSANOW() + error check */
         ioctl_or_perror_and_die(0, TCSETS, tp, "%s: TCSETS", op->tty);
 }
 
@@ -689,6 +690,7 @@ int getty_main(int argc UNUSED_PARAM, char **argv)
          * by patching the SunOS kernel variable "zsadtrlow" to a larger value;
          * 5 seconds seems to be a good value.
          */
+        /* tcgetattr() + error check */
         ioctl_or_perror_and_die(0, TCGETS, &termios, "%s: TCGETS", options.tty);
 
 #ifdef __linux__
@@ -753,7 +755,7 @@ int getty_main(int argc UNUSED_PARAM, char **argv)
                         baud_index = (baud_index + 1) % options.numspeed;
                         termios.c_cflag &= ~CBAUD;
                         termios.c_cflag |= options.speeds[baud_index];
-                        ioctl(0, TCSETS, &termios);
+                        tcsetattr_stdin_TCSANOW(&termios);
                 }
         }
 
diff --git a/loginutils/vlock.c b/loginutils/vlock.c
index 42ef44732..0262da5bd 100644
--- a/loginutils/vlock.c
+++ b/loginutils/vlock.c
@@ -87,7 +87,7 @@ int vlock_main(int argc UNUSED_PARAM, char **argv)
         term.c_iflag |= IGNBRK;
         term.c_lflag &= ~ISIG;
         term.c_lflag &= ~(ECHO | ECHOCTL);
-        tcsetattr(STDIN_FILENO, TCSANOW, &term);
+        tcsetattr_stdin_TCSANOW(&term);
 
         do {
                 printf("Virtual console%s locked by %s.\n",
@@ -101,6 +101,6 @@ int vlock_main(int argc UNUSED_PARAM, char **argv)
         } while (1);
 
         ioctl(STDIN_FILENO, VT_SETMODE, &ovtm);
-        tcsetattr(STDIN_FILENO, TCSANOW, &oterm);
+        tcsetattr_stdin_TCSANOW(&oterm);
         fflush_stdout_and_exit(EXIT_SUCCESS);
 }
diff --git a/networking/telnetd.c b/networking/telnetd.c
index 7f748641b..efc2bf607 100644
--- a/networking/telnetd.c
+++ b/networking/telnetd.c
@@ -243,7 +243,7 @@ make_new_session(
         termbuf.c_iflag |= ICRNL;
         termbuf.c_iflag &= ~IXOFF;
         /*termbuf.c_lflag &= ~ICANON;*/
-        tcsetattr(0, TCSANOW, &termbuf);
+        tcsetattr_stdin_TCSANOW(&termbuf);
 
         /* Uses FILE-based I/O to stdout, but does fflush(stdout),
          * so should be safe with vfork.
diff --git a/procps/top.c b/procps/top.c
index 908ae8151..1d22871f6 100644
--- a/procps/top.c
+++ b/procps/top.c
@@ -649,7 +649,7 @@ static void clearmems(void)
 
 static void reset_term(void)
 {
-        tcsetattr(0, TCSANOW, &initial_settings);
+        tcsetattr_stdin_TCSANOW(&initial_settings);
         if (ENABLE_FEATURE_CLEAN_UP) {
                 clearmems();
 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
@@ -941,7 +941,7 @@ int top_main(int argc UNUSED_PARAM, char **argv)
         new_settings.c_lflag &= ~(ISIG | ICANON | ECHO | ECHONL);
 
         bb_signals(BB_FATAL_SIGS, sig_catcher);
-        tcsetattr(0, TCSANOW, (void *) &new_settings);
+        tcsetattr_stdin_TCSANOW(&new_settings);
 #endif /* FEATURE_USE_TERMIOS */
 
 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
diff --git a/util-linux/fsck_minix.c b/util-linux/fsck_minix.c
index 2dbd437a3..78a7c826b 100644
--- a/util-linux/fsck_minix.c
+++ b/util-linux/fsck_minix.c
@@ -293,7 +293,7 @@ static void die(const char *str) NORETURN;
 static void die(const char *str)
 {
         if (termios_set)
-                tcsetattr(0, TCSANOW, &sv_termios);
+                tcsetattr_stdin_TCSANOW(&sv_termios);
         bb_error_msg_and_die("%s", str);
 }
 
@@ -1254,7 +1254,7 @@ int fsck_minix_main(int argc UNUSED_PARAM, char **argv)
                 tcgetattr(0, &sv_termios);
                 tmp = sv_termios;
                 tmp.c_lflag &= ~(ICANON | ECHO);
-                tcsetattr(0, TCSANOW, &tmp);
+                tcsetattr_stdin_TCSANOW(&tmp);
                 termios_set = 1;
         }
 
@@ -1299,7 +1299,7 @@ int fsck_minix_main(int argc UNUSED_PARAM, char **argv)
                 write_superblock();
 
         if (OPT_manual)
-                tcsetattr(0, TCSANOW, &sv_termios);
+                tcsetattr_stdin_TCSANOW(&sv_termios);
 
         if (changed)
                 retcode += 3;