Add LINE_MAX configuration

Signed-off-by: zhangshoukui <zhangshoukui@xiaomi.com>

Author: Zhangshoukui

include/limits.h

@@ -130,7 +130,7 @@
 #define _POSIX_PIPE_BUF       512
 #define _POSIX_STREAM_MAX     16
 #define _POSIX_TZNAME_MAX     3
-#define _POSIX2_LINE_MAX      80
+#define _POSIX2_LINE_MAX      CONFIG_LINE_MAX
 
 #ifdef CONFIG_SMALL_MEMORY
 

sched/Kconfig

@@ -1412,6 +1412,16 @@ config PATH_MAX
 	---help---
 		The maximum size of path name.
 
+config LINE_MAX
+	int "Maximum size of line"
+	default 64 if DEFAULT_SMALL
+	default 80 if !DEFAULT_SMALL
+	---help---
+		The maximum size of line. Unless otherwise noted, the maximum length, in bytes,
+		of a utility's input line (either standard input or another file), when the
+		utility is described as processing text files. The length includes room for
+		the trailing newline.
+
 endmenu # Files and I/O
 
 menuconfig PRIORITY_INHERITANCE