busybox/loadkmap.c

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C
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#include "internal.h"
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <linux/kd.h>
#include <linux/keyboard.h>
#include <sys/ioctl.h>
const char loadkmap_usage[] = "loadkmap\n"
"\n"
"\tLoad a binary keyboard translation table from standard input.\n"
"\n";
int
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loadkmap_main(int argc, char * * argv)
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{
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];
fd = open("/dev/tty0", O_RDWR);
if (fd < 0) {
fprintf(stderr, "Error opening /dev/tty0: %s\n", strerror(errno));
return 1;
}
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;
}
ibuff=(u_short *) malloc(ibuffsz);
if (!ibuff) {
fprintf(stderr, "Out of memory.\n");
return 1;
}
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);
}
}
}
close (fd);
return 0;
}