introduce libbb/termios.c for terminal-related functions

5 files changed, 189 insertions, 83 deletions

diff --git a/include/cygwin_termios.h b/include/cygwin_termios.h
new file mode 100644
index 000000000..b7ec2957f
--- /dev/null
+++ b/include/cygwin_termios.h
@@ -0,0 +1,109 @@
+/* iflag bits */
+#define IGNBRK  0x00001
+#define BRKINT  0x00002
+#define IGNPAR  0x00004
+#define IMAXBEL 0x00008
+#define INPCK   0x00010
+#define ISTRIP  0x00020
+#define INLCR   0x00040
+#define IGNCR   0x00080
+#define ICRNL   0x00100
+#define IXON    0x00400
+#define IXOFF   0x01000
+#define IUCLC   0x04000
+#define IXANY   0x08000
+#define PARMRK  0x10000
+
+/* oflag bits */
+
+#define OPOST   0x00001
+#define OLCUC   0x00002
+#define OCRNL   0x00004
+#define ONLCR   0x00008
+#define ONOCR   0x00010
+#define ONLRET  0x00020
+#define OFILL   0x00040
+#define CRDLY   0x00180
+#define CR0     0x00000
+#define CR1     0x00080
+#define CR2     0x00100
+#define CR3     0x00180
+#define NLDLY   0x00200
+#define NL0     0x00000
+#define NL1     0x00200
+#define BSDLY   0x00400
+#define BS0     0x00000
+#define BS1     0x00400
+#define TABDLY  0x01800
+#define TAB0    0x00000
+#define TAB1    0x00800
+#define TAB2    0x01000
+#define TAB3    0x01800
+#define XTABS   0x01800
+#define VTDLY   0x02000
+#define VT0     0x00000
+#define VT1     0x02000
+#define FFDLY   0x04000
+#define FF0     0x00000
+#define FF1     0x04000
+#define OFDEL   0x08000
+
+/* lflag bits */
+#define ISIG    0x0001
+#define ICANON  0x0002
+#define ECHO    0x0004
+#define ECHOE   0x0008
+#define ECHOK   0x0010
+#define ECHONL  0x0020
+#define NOFLSH  0x0040
+#define TOSTOP  0x0080
+#define IEXTEN  0x0100
+#define FLUSHO  0x0200
+#define ECHOKE  0x0400
+#define ECHOCTL 0x0800
+
+#define VDISCARD        1
+#define VEOL            2
+#define VEOL2           3
+#define VEOF            4
+#define VERASE          5
+#define VINTR           6
+#define VKILL           7
+#define VLNEXT          8
+#define VMIN            9
+#define VQUIT           10
+#define VREPRINT        11
+#define VSTART          12
+#define VSTOP           13
+#define VSUSP           14
+#define VSWTC           15
+#define VTIME           16
+#define VWERASE 17
+
+#define TCSAFLUSH       1
+#define TCSANOW         2
+#define TCSADRAIN       3
+#define TCSADFLUSH      4
+
+typedef unsigned char cc_t;
+typedef unsigned int  tcflag_t;
+typedef unsigned int  speed_t;
+typedef unsigned short otcflag_t;
+typedef unsigned char ospeed_t;
+
+#define NCCS            18
+struct termios {
+        tcflag_t        c_iflag;
+        tcflag_t        c_oflag;
+        tcflag_t        c_cflag;
+        tcflag_t        c_lflag;
+        char            c_line;
+        cc_t            c_cc[NCCS];
+        speed_t         c_ispeed;
+        speed_t         c_ospeed;
+};
+
+int tcgetattr(int fd, struct termios *t);
+int tcsetattr(int fd, int mode,  const struct termios *t);
+int is_cygwin_tty(int fd);
+int wincon_read(int fd, char *buf, int size);
diff --git a/libbb/Kbuild b/libbb/Kbuild
index e335a95dc..b3560bd0b 100644
--- a/libbb/Kbuild
+++ b/libbb/Kbuild
@@ -138,6 +138,7 @@ lib-$(CONFIG_MINGW32) += setenv.o
 lib-$(CONFIG_MINGW32) += strbuf.o
 lib-$(CONFIG_MINGW32) += strbuf_file.o
 lib-$(CONFIG_MINGW32) += strlcpy.o
+lib-$(CONFIG_MINGW32) += termios.o
 lib-$(CONFIG_MINGW32) += trace.o
 lib-$(CONFIG_MINGW32) += usage.o
 lib-$(CONFIG_MINGW32) += winansi.o
diff --git a/libbb/lineedit.c b/libbb/lineedit.c
index b349bc6f2..e56dd20b0 100644
--- a/libbb/lineedit.c
+++ b/libbb/lineedit.c
@@ -59,28 +59,13 @@
 #define ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR \
 (ENABLE_FEATURE_USERNAME_COMPLETION || ENABLE_FEATURE_EDITING_FANCY_PROMPT)
 
-
-static line_input_t *state;
-
 #ifdef __MINGW32__
-struct termios {
-        int c_lflag;
-        int c_cc[3];
-};
-#define safe_read(fd,buf,n) wincon_read(fd,buf,n)
-/* True value does not matter because it's emulated */
-#define ICANON  1
-#define ECHO    2
-#define ECHONL  4
-#define ISIG    8
-
-#define VMIN    0
-#define VTIME   1
-#define VINTR   2
-
-static int wincon_read(int fd, char *buf, int size);
+#include "cygwin_termios.h"
+#define safe_read(fd,buf,size) wincon_read(fd,buf,size)
 #endif
 
+static line_input_t *state;
+
 static struct termios initial_settings, new_settings;
 
 static volatile unsigned cmdedit_termw = 80;        /* actual terminal width */
@@ -1227,13 +1212,10 @@ static void parse_prompt(const char *prmt_ptr)
 }
 #endif
 
-#ifdef __MINGW32__
-#define setTermSettings(fd, argp)
-#define getTermSettings(fd, argp) ((struct termios *)argp)->c_lflag = ECHO;
-#else
 #define setTermSettings(fd, argp) tcsetattr(fd, TCSANOW, argp)
 #define getTermSettings(fd, argp) tcgetattr(fd, argp);
 
+#ifndef __MINGW32__
 static sighandler_t previous_SIGWINCH_handler;
 #endif
 
@@ -1770,46 +1752,6 @@ line_input_t *new_line_input_t(int flags)
         return n;
 }
 
-#ifdef __MINGW32__
-#include <windef.h>
-#include <wincon.h>
-#include "strbuf.h"
-
-#undef safe_read
-static int wincon_read(int fd, char *buf, int size)
-{
-        static struct strbuf input = STRBUF_INIT;
-        HANDLE cin = GetStdHandle(STD_INPUT_HANDLE);
-        static int initialized = 0;
-
-        if (fd != 0)
-                die("wincon_read is for stdin only");
-        if (cin == INVALID_HANDLE_VALUE)
-                return safe_read(fd, buf, size);
-        if (!initialized) {
-                SetConsoleMode(cin, ENABLE_ECHO_INPUT);
-                initialized = 1;
-        }
-        while (input.len < size) {
-                INPUT_RECORD record;
-                DWORD nevent = 0, nevent_out;
-                int ch;
-
-                if (!ReadConsoleInput(cin, &record, 1, &nevent_out))
-                        return -1;
-                if (record.EventType != KEY_EVENT || !record.Event.KeyEvent.bKeyDown)
-                        continue;
-                ch = record.Event.KeyEvent.uChar.AsciiChar;
-                /* Ctrl-X is handled by ReadConsoleInput, Alt-X is not needed anyway */
-                strbuf_addch(&input, ch);
-        }
-        memcpy(buf, input.buf, size);
-        memcpy(input.buf, input.buf+size, input.len-size+1);
-        strbuf_setlen(&input, input.len-size);
-        return size;
-}
-#endif
-
 #else
 
 #undef read_line_input
diff --git a/libbb/termios.c b/libbb/termios.c
new file mode 100644
index 000000000..f47593a49
--- /dev/null
+++ b/libbb/termios.c
@@ -0,0 +1,73 @@
+#include "libbb.h"
+#include <windef.h>
+#include <wincon.h>
+#include "strbuf.h"
+#include "cygwin_termios.h"
+
+int tcgetattr(int fd, struct termios *t)
+{
+        t->c_lflag = ECHO;
+        return 0;
+}
+
+
+int tcsetattr(int fd, int mode, const struct termios *t)
+{
+        return 0;
+}
+
+static int get_wincon_width_height(const int fd, int *width, int *height)
+{
+        HANDLE console;
+        CONSOLE_SCREEN_BUFFER_INFO sbi;
+
+        console = GetStdHandle(STD_OUTPUT_HANDLE);
+        if (console == INVALID_HANDLE_VALUE || !console)
+                return -1;
+
+        GetConsoleScreenBufferInfo(console, &sbi);
+
+        if (width)
+                *width = sbi.srWindow.Right - sbi.srWindow.Left;
+        if (height)
+                *height = sbi.srWindow.Bottom - sbi.srWindow.Top;
+        return 0;
+}
+
+int get_terminal_width_height(const int fd, int *width, int *height)
+{
+        return get_wincon_width_height(fd, width, height);
+}
+
+int wincon_read(int fd, char *buf, int size)
+{
+        static struct strbuf input = STRBUF_INIT;
+        HANDLE cin = GetStdHandle(STD_INPUT_HANDLE);
+        static int initialized = 0;
+
+        if (fd != 0)
+                die("wincon_read is for stdin only");
+        if (cin == INVALID_HANDLE_VALUE || is_cygwin_tty(fd))
+                return safe_read(fd, buf, size);
+        if (!initialized) {
+                SetConsoleMode(cin, ENABLE_ECHO_INPUT);
+                initialized = 1;
+        }
+        while (input.len < size) {
+                INPUT_RECORD record;
+                DWORD nevent_out;
+                int ch;
+
+                if (!ReadConsoleInput(cin, &record, 1, &nevent_out))
+                        return -1;
+                if (record.EventType != KEY_EVENT || !record.Event.KeyEvent.bKeyDown)
+                        continue;
+                ch = record.Event.KeyEvent.uChar.AsciiChar;
+                /* Ctrl-X is handled by ReadConsoleInput, Alt-X is not needed anyway */
+                strbuf_addch(&input, ch);
+        }
+        memcpy(buf, input.buf, size);
+        memcpy(input.buf, input.buf+size, input.len-size+1);
+        strbuf_setlen(&input, input.len-size);
+        return size;
+}
diff --git a/libbb/xfuncs.c b/libbb/xfuncs.c
index 06bba0fe3..3d0bec7ac 100644
--- a/libbb/xfuncs.c
+++ b/libbb/xfuncs.c
@@ -625,26 +625,7 @@ void selinux_or_die(void)
 
 /* It is perfectly ok to pass in a NULL for either width or for
  * height, in which case that value will not be set.  */
-#ifdef __MINGW32__
-#include <windows.h>
-int get_terminal_width_height(const int fd, int *width, int *height)
-{
-        HANDLE console;
-        CONSOLE_SCREEN_BUFFER_INFO sbi;
-
-        console = GetStdHandle(STD_OUTPUT_HANDLE);
-        if (console == INVALID_HANDLE_VALUE || !console)
-                return -1;
-
-        GetConsoleScreenBufferInfo(console, &sbi);
-
-        if (width)
-                *width = sbi.srWindow.Right - sbi.srWindow.Left;
-        if (height)
-                *height = sbi.srWindow.Bottom - sbi.srWindow.Top;
-        return 0;
-}
-#else
+#ifndef __MINGW32__
 int get_terminal_width_height(const int fd, int *width, int *height)
 {
         struct winsize win = { 0, 0, 0, 0 };