ls: handle -i through option_mask32

[oweals/busybox.git] / console-tools / loadkmap.c

diff --git a/console-tools/loadkmap.c b/console-tools/loadkmap.c
index 0f092d1932e4058f1fd7cc647b36fafa05731d4d..70ab55a8e88cb0a2980ec7d0aa35612cd852f2f4 100644 (file)
--- a/console-tools/loadkmap.c
+++ b/console-tools/loadkmap.c
@@ -1,68 +1,103 @@
-#include "internal.h"
-#include <errno.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <linux/kd.h>
-#include <linux/keyboard.h>
-#include <sys/ioctl.h>
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini loadkmap implementation for busybox
+ *
+ * Copyright (C) 1998 Enrique Zanardi <ezanardi@ull.es>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+//config:config LOADKMAP
+//config:      bool "loadkmap"
+//config:      default y
+//config:      select PLATFORM_LINUX
+//config:      help
+//config:        This program loads a keyboard translation table from
+//config:        standard input.
 
+//applet:IF_LOADKMAP(APPLET(loadkmap, BB_DIR_SBIN, BB_SUID_DROP))
 
-const char                     loadkmap_usage[] = "loadkmap\n"
-"\n"
-"\tLoad a binary keyboard translation table from standard input.\n"
-"\n";
+//kbuild:lib-$(CONFIG_LOADKMAP) += loadkmap.o
 
+//usage:#define loadkmap_trivial_usage
+//usage:       "< keymap"
+//usage:#define loadkmap_full_usage "\n\n"
+//usage:       "Load a binary keyboard translation table from stdin"
+////usage:       "\n"
+////usage:       "\n   -C TTY  Affect TTY instead of /dev/tty"
+//usage:
+//usage:#define loadkmap_example_usage
+//usage:       "$ loadkmap < /etc/i18n/lang-keymap\n"
 
-int
-loadkmap_main(struct FileInfo * info, int argc, char * * argv)
-{ 
-    struct kbentry ke;
-    u_short *ibuff;
-    int i,j,fd,readsz,pos,ibuffsz=NR_KEYS * sizeof(u_short);
-    char flags[MAX_NR_KEYMAPS],magic[]="bkeymap",buff[7];
+#include "libbb.h"
 
-    fd = open("/dev/tty0", O_RDWR);
-    if (fd < 0) {
-       fprintf(stderr, "Error opening /dev/tty0: %s\n", strerror(errno));
-       return 1;
-    }
+#define BINARY_KEYMAP_MAGIC "bkeymap"
 
-    read(0,buff,7);
-    if (0 != strncmp(buff,magic,7)) {
-       fprintf(stderr, "This is not a valid binary keymap.\n");
-       return 1;
-    }
-   
-    if ( MAX_NR_KEYMAPS != read(0,flags,MAX_NR_KEYMAPS) ) {
-       fprintf(stderr, "Error reading keymap flags: %s\n", strerror(errno));
-       return 1;
-    }
+/* From <linux/kd.h> */
+struct kbentry {
+       unsigned char kb_table;
+       unsigned char kb_index;
+       unsigned short kb_value;
+};
+/* sets one entry in translation table */
+#define KDSKBENT        0x4B47
 
-    ibuff=(u_short *) malloc(ibuffsz);
-    if (!ibuff) {
-       fprintf(stderr, "Out of memory.\n");
-       return 1;
-    }
+/* From <linux/keyboard.h> */
+#define NR_KEYS         128
+#define MAX_NR_KEYMAPS  256
 
-    for(i=0; i<MAX_NR_KEYMAPS; i++) {
-       if (flags[i]==1){
-           pos=0;
-           while (pos < ibuffsz) {
-               if ( (readsz = read(0,ibuff+pos,ibuffsz-pos)) < 0 ) {
-                   fprintf(stderr, "Error reading keymap: %s\n", 
-                       strerror(errno));
-                   return 1;
-               }
-               pos += readsz;
-           }
-           for(j=0; j<NR_KEYS; j++) {
-               ke.kb_index = j;
-               ke.kb_table = i;
-               ke.kb_value = ibuff[j];
-               ioctl(fd, KDSKBENT, &ke);
-           }
+int loadkmap_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int loadkmap_main(int argc UNUSED_PARAM, char **argv)
+{
+       struct kbentry ke;
+       int i, j, fd;
+       uint16_t ibuff[NR_KEYS];
+/*     const char *tty_name = CURRENT_TTY; */
+       RESERVE_CONFIG_BUFFER(flags, MAX_NR_KEYMAPS);
+
+       /* When user accidentally runs "loadkmap FILE"
+        * instead of "loadkmap <FILE", we end up waiting for input from tty.
+        * Let's prevent it: */
+       if (argv[1])
+               bb_show_usage();
+/* bb_warn_ignoring_args(argv[1]); */
+
+       fd = get_console_fd_or_die();
+/* or maybe:
+       opt = getopt32(argv, "C:", &tty_name);
+       fd = xopen_nonblocking(tty_name);
+*/
+
+       xread(STDIN_FILENO, flags, 7);
+       if (!is_prefixed_with(flags, BINARY_KEYMAP_MAGIC))
+               bb_error_msg_and_die("not a valid binary keymap");
+
+       xread(STDIN_FILENO, flags, MAX_NR_KEYMAPS);
+
+       for (i = 0; i < MAX_NR_KEYMAPS; i++) {
+               if (flags[i] != 1)
+                       continue;
+               xread(STDIN_FILENO, ibuff, NR_KEYS * sizeof(uint16_t));
+               for (j = 0; j < NR_KEYS; j++) {
+                       ke.kb_index = j;
+                       ke.kb_table = i;
+                       ke.kb_value = ibuff[j];
+                       /*
+                        * Note: table[idx:0] can contain special value
+                        * K_ALLOCATED (marks allocated tables in kernel).
+                        * dumpkmap saves the value as-is; but attempts
+                        * to load it here fail, since it isn't a valid
+                        * key value: it is K(KT_SPEC,126) == 2<<8 + 126,
+                        * whereas last valid KT_SPEC is
+                        * K_BARENUMLOCK == K(KT_SPEC,19).
+                        * So far we just ignore these errors:
+                        */
+                       ioctl(fd, KDSKBENT, &ke);
+               }
+       }
+
+       if (ENABLE_FEATURE_CLEAN_UP) {
+               close(fd);
+               RELEASE_CONFIG_BUFFER(flags);
        }
-    }
-    close (fd);
-    return 0;
+       return EXIT_SUCCESS;
 }