Read in text mode in a needed place only

Converting CR+LF to LF in blocking_read() which is a underlying read
function, may affect to the functions which do not perform line-based
operation.

    modified:   funcs.c
    modified:   main.c
    modified:   misc.c
    modified:   os2.c
    modified:   shf.c

funcs.c

@@ -1975,6 +1975,9 @@ c_read(const char **wp)
 #define c_read_opts "Aad:N:n:prst:u,"
 #else
 #define c_read_opts "Aad:N:n:prsu,"
+#endif
+#ifdef __OS2__
+	int saved_mode;
 #endif
 
 	while ((c = ksh_getopt(wp, &builtin_opt, c_read_opts)) != -1)
@@ -2104,7 +2107,13 @@ c_read(const char **wp)
 	}
 #endif
 
+#ifdef __OS2__
+	saved_mode = setmode(fd, O_TEXT);
+#endif
 	if ((bytesread = blocking_read(fd, xp, bytesleft)) == (size_t)-1) {
+#ifdef __OS2__
+		setmode(fd, saved_mode);
+#endif
 		if (errno == EINTR) {
 			/* check whether the signal would normally kill */
 			if (!fatal_trap_check()) {
@@ -2119,6 +2128,9 @@ c_read(const char **wp)
 		rv = 2;
 		goto c_read_out;
 	}
+#ifdef __OS2__
+	setmode(fd, saved_mode);
+#endif
 
 	switch (readmode) {
 	case READALL: