将消息从子进程发送到父进程 [英] Send messages from child process to parent

问题描述

我正在执行父代码.然后，我先执行fork，然后执行execvpe.我"execvpe"的新程序会抛出很多控制台消息，我想隐藏这些消息.

I am executing the parent code. I then do a fork and then execvpe. The new program that i "execvpe" throws a lot of console messages and i want to hide those.

我是否可以将子进程中的所有stdout和stderr消息重定向到文件上?

Is it possible for me to redirect all my stdout and stderr messages in the child process onto a file?

我尝试了close(1)，这样我就不会在控制台(stdout)上转储消息了，这没有帮助

I tried a close(1) so that i dont dump messages on console (stdout) and that didnt help

推荐答案

pid_t pid = fork();
/* Child process */
if (pid == 0) {
    /* Open log file */
    int log = creat("logfile", 0644);
    /* Redirect stdout to log file */
    close(1);
    dup(log);
    /* Redirect stderr to log file */
    close(2);
    dup(log);
    /* Execute other program: its stdout & stderr (1 & 2) will both point to logfile */
    execvpe(.......);
}

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