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sortix--sortix/utils/chkblayout.cpp
Jonas 'Sortie' Termansen 8274981a81 Add chkblayout(1).
2015-12-19 02:49:37 +01:00

149 lines
4.1 KiB
C++

/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2014.
This program is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the Free
Software Foundation, either version 3 of the License, or (at your option)
any later version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
You should have received a copy of the GNU General Public License along with
this program. If not, see <http://www.gnu.org/licenses/>.
chkblayout.cpp
Changes the current keyboard layout.
*******************************************************************************/
#include <sys/stat.h>
#include <errno.h>
#include <error.h>
#include <fcntl.h>
#include <ioleast.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <termios.h>
static void compact_arguments(int* argc, char*** argv)
{
for ( int i = 0; i < *argc; i++ )
{
while ( i < *argc && !(*argv)[i] )
{
for ( int n = i; n < *argc; n++ )
(*argv)[n] = (*argv)[n+1];
(*argc)--;
}
}
}
static void help(FILE* fp, const char* argv0)
{
fprintf(fp, "Usage: %s [OPTION...] [LAYOUT-NAME]\n", argv0);
fprintf(fp, "Changes the current keyboard layout.\n");
fprintf(fp, "\n");
fprintf(fp, "Options supported by %s:\n", argv0);
fprintf(fp, " --help Display this help and exit\n");
fprintf(fp, " --version Output version information and exit\n");
}
static void version(FILE* fp, const char* argv0)
{
fprintf(fp, "%s (Sortix) %s\n", argv0, VERSIONSTR);
fprintf(fp, "License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.\n");
fprintf(fp, "This is free software: you are free to change and redistribute it.\n");
fprintf(fp, "There is NO WARRANTY, to the extent permitted by law.\n");
}
int main(int argc, char* argv[])
{
setlocale(LC_ALL, "");
const char* argv0 = argv[0];
for ( int i = 1; i < argc; i++ )
{
const char* arg = argv[i];
if ( arg[0] != '-' || !arg[1] )
continue;
argv[i] = NULL;
if ( !strcmp(arg, "--") )
break;
if ( arg[1] != '-' )
{
while ( char c = *++arg ) switch ( c )
{
default:
fprintf(stderr, "%s: unknown option -- '%c'\n", argv0, c);
help(stderr, argv0);
exit(1);
}
}
else if ( !strcmp(arg, "--help") )
help(stdout, argv0), exit(0);
else if ( !strcmp(arg, "--version") )
version(stdout, argv0), exit(0);
else
{
fprintf(stderr, "%s: unknown option: %s\n", argv0, arg);
help(stderr, argv0);
exit(1);
}
}
compact_arguments(&argc, &argv);
const char* tty_path = "/dev/tty";
int tty_fd = open(tty_path, O_WRONLY);
if ( tty_fd < 0 )
error(1, errno, "`%s'", tty_path);
if ( !isatty(tty_fd) )
error(1, errno, "`%s'", tty_path);
if ( argc == 1 )
error(1, 0, "expected path to new keyboard layout");
const char* kblayout_path = argv[1];
if ( !strchr(kblayout_path, '/') )
{
char* new_kblayout_path;
if ( asprintf(&new_kblayout_path, "/share/kblayout/%s", kblayout_path) < 0 )
error(1, errno, "asprintf");
kblayout_path = new_kblayout_path;
}
int kblayout_fd = open(kblayout_path, O_RDONLY);
if ( kblayout_fd < 0 )
error(1, errno, "`%s'", kblayout_path);
struct stat kblayout_st;
if ( fstat(kblayout_fd, &kblayout_st) < 0 )
error(1, errno, "stat: `%s'", kblayout_path);
if ( SIZE_MAX < (size_t) kblayout_st.st_size )
error(1, EFBIG, "`%s'", kblayout_path);
size_t kblayout_size = (size_t) kblayout_st.st_size;
unsigned char* kblayout = (unsigned char*) malloc(kblayout_size);
if ( !kblayout )
error(1, errno, "malloc");
if ( readall(kblayout_fd, kblayout, kblayout_size) != kblayout_size )
error(1, errno, "read: `%s'", kblayout_path);
close(kblayout_fd);
if ( tcsetblob(tty_fd, "kblayout", kblayout, kblayout_size) < 0 )
error(1, errno, "tcsetblob(\"kblayout\", `%s')", kblayout_path);
free(kblayout);
close(tty_fd);
return 0;
}