- Rename getpty() to xgetpty() and adjust callers.

- Rewrite kbd_mode and setconsole
- Introduce and use console_make_active() and xopen_xwrite_close()
- honour buffer-reservation method as set by the user (dumpkmap, loadkmap)
- shrink rtcwake and some console-tools

  Saves about 270 Bytes

libbb/Kbuild

@@ -98,6 +98,7 @@ lib-y += vfork_daemon_rexec.o
 lib-y += warn_ignoring_args.o
 lib-y += wfopen.o
 lib-y += wfopen_input.o
+lib-y += write.o
 lib-y += xatonum.o
 lib-y += xconnect.o
 lib-y += xfuncs.o

libbb/get_console.c

@@ -8,10 +8,8 @@
  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  */
 
-//#include <sys/ioctl.h>
 #include "libbb.h"
 
-
 /* From <linux/kd.h> */
 enum { KDGKBTYPE = 0x4B33 };  /* get keyboard type */
 
@@ -70,3 +68,15 @@ int get_console_fd(void)
 	bb_error_msg("can't open console");
 	return fd;                      /* total failure */
 }
+
+/* From <linux/vt.h> */
+enum {
+	VT_ACTIVATE = 0x5606,   /* make vt active */
+	VT_WAITACTIVE = 0x5607  /* wait for vt active */
+};
+
+void console_make_active(int fd, const int vt_num)
+{
+	xioctl(fd, VT_ACTIVATE, (void *)(ptrdiff_t)vt_num);
+	xioctl(fd, VT_WAITACTIVE, (void *)(ptrdiff_t)vt_num);
+}

libbb/getpty.c

@@ -10,7 +10,7 @@
 
 #define DEBUG 0
 
-int getpty(char *line)
+int xgetpty(char *line)
 {
 	int p;
 #if ENABLE_FEATURE_DEVPTS
@@ -22,7 +22,7 @@ int getpty(char *line)
 		name = ptsname(p);
 		if (!name) {
 			bb_perror_msg("ptsname error (is /dev/pts mounted?)");
-			return -1;
+			goto fail;
 		}
 		safe_strncpy(line, name, GETPTY_BUFSIZE);
 		return p;
@@ -52,7 +52,9 @@ int getpty(char *line)
 		}
 	}
 #endif /* FEATURE_DEVPTS */
-	return -1;
+USE_FEATURE_DEVPTS( fail:)
+	bb_error_msg_and_die("open pty");
+	return -1; /* never get here */
 }
 
 

libbb/write.c

@@ -0,0 +1,20 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Utility routines.
+ *
+ * Copyright (C) 2008 Bernhard Fischer
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+#include "libbb.h"
+
+/* Open file and write string str to it, close file.
+ * Die on any open or write-error.  */
+void xopen_xwrite_close(const char* file, const char* str)
+{
+	int fd = xopen(file, O_WRONLY);
+
+	xwrite(fd, str, strlen(str));
+	close(fd);
+}