发送一个命令到其他的终端执行

#include 
#include 
#include 
#include 
#include 
#include 
#include 

void print_help(char *prog_name) {
        printf("Usage: %s [-n] DEVNAME COMMAND\n", prog_name);
        printf("Usage: '-n' is an optional argument if you want to push a new line at the end of the text\n");
        printf("Usage: Will require 'sudo' to run if the executable is not setuid root\n");
        exit(1);
}

int main (int argc, char *argv[]) {
    char *cmd, *nl = "\n";
    int i, fd;
    int devno, commandno, newline;
    int mem_len;
    devno = 1; commandno = 2; newline = 0;
    if (argc < 3) {
        print_help(argv[0]);
    }
    if (argc > 3 && argv[1][0] == '-' && argv[1][1] == 'n') {
        devno = 2; commandno = 3; newline=1;
    } else if (argc > 3 && argv[1][0] == '-' && argv[1][1] != 'n') {
        printf("Invalid Option\n");
        print_help(argv[0]);
    }
    fd = open(argv[devno],O_RDWR);
    if(fd == -1) {
        perror("open DEVICE");
        exit(1);
    }
    mem_len = 0;
    for ( i = commandno; i < argc; i++ ) {
        mem_len += strlen(argv[i]) + 2;
        if ( i > commandno ) {
            cmd = (char *)realloc((void *)cmd, mem_len);
        } else { //i == commandno
            cmd = (char *)malloc(mem_len);
        }

        strcat(cmd, argv[i]);
        strcat(cmd, " ");
    }
  if (newline == 0)
        usleep(225000);
    for (i = 0; cmd[i]; i++)
        ioctl (fd, TIOCSTI, cmd+i);
    if (newline == 1)
        ioctl (fd, TIOCSTI, nl);
    close(fd);
    free((void *)cmd);
    exit (0);
}

编译

使用方法

假使编译的程序叫echotty

使用方法

echotty -n   tty的路径  命令

例子

echotty -n /dev/pts/4  ifconfig

可以把命令送到/dev/pts/4 这个终端，并且执行ifconfig

参考链接：http://askubuntu.com/questions/194293/how-to-send-terminal-command-to-a-tty-terminal

http://stackoverflow.com/questions/8677623/linux-pseudo-terminals-executing-string-sent-from-one-terminal-in-another

http://unix.stackexchange.com/questions/39145/execute-command-in-remote-active-terminal

http://www.humbug.in/2010/utility-to-send-commands-or-data-to-other-terminals-ttypts/#.U3XAWHa7h9Y