win32: implement ioctl

3 files changed, 26 insertions, 1 deletions

diff --git a/win32/Kbuild b/win32/Kbuild
index 42df86692..ceede0c67 100644
--- a/win32/Kbuild
+++ b/win32/Kbuild
@@ -6,6 +6,7 @@ lib-y:=
 
 lib-$(CONFIG_PLATFORM_MINGW32) += env.o
 lib-$(CONFIG_PLATFORM_MINGW32) += fnmatch.o
+lib-$(CONFIG_PLATFORM_MINGW32) += ioctl.o
 lib-$(CONFIG_PLATFORM_MINGW32) += mingw.o
 lib-$(CONFIG_PLATFORM_MINGW32) += process.o
 lib-$(CONFIG_PLATFORM_MINGW32) += regex.o
diff --git a/win32/ioctl.c b/win32/ioctl.c
new file mode 100644
index 000000000..73ceeedec
--- /dev/null
+++ b/win32/ioctl.c
@@ -0,0 +1,24 @@
+#include "libbb.h"
+
+int ioctl(int fd UNUSED_PARAM, int code, ...)
+{
+        va_list ap;
+        void *arg;
+        int ret = -1;
+
+        va_start(ap, code);
+
+        switch (code) {
+        case TIOCGWINSZ:
+                arg = va_arg(ap, void *);
+                ret = winansi_get_terminal_width_height((struct winsize *)arg);
+                break;
+        default:
+                ret = -1;
+                errno = EINVAL;
+                break;
+        }
+
+        va_end(ap);
+        return ret;
+}
diff --git a/win32/winansi.c b/win32/winansi.c
index 7730fd006..c923bde56 100644
--- a/win32/winansi.c
+++ b/win32/winansi.c
@@ -432,5 +432,5 @@ int winansi_get_terminal_width_height(struct winsize *win)
                 win->ws_col = sbi.srWindow.Right - sbi.srWindow.Left + 1;
         }
 
-        return ret;
+        return ret ? 0 : -1;
 }