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/*
* Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
* Copyright (C) 2013 John Crispin <blogic@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation
*
* 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.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
static int redirect_output(const char *dev)
{
pid_t p = setsid();
int fd;
chdir("/dev");
fd = open(dev, O_RDWR);
chdir("/");
if (fd < 0)
return -1;
close(STDIN_FILENO);
close(STDOUT_FILENO);
close(STDERR_FILENO);
dup2(fd, STDIN_FILENO);
dup2(fd, STDOUT_FILENO);
dup2(fd, STDERR_FILENO);
tcsetpgrp(fd, p);
close(fd);
return 0;
}
int main(int argc, char **argv)
{
if (redirect_output(argv[1]))
fprintf(stderr, "%s: Failed to open %s\n", argv[0], argv[1]);
printf("Please press Enter to activate this console.\n");
while (getchar() != 0xA)
;
execvp(argv[2], &argv[2]);
printf("%s: Failed to execute %s\n", argv[0], argv[2]);
return -1;
}
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