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"как использовать daemon" Отправлено primus, 26-Окт-06 20:34
Here is some skeleton code for creating a daemon (modified from Unix Network Programming: The Sockets Networking API Vol 1, third edition,by W. R. Stevens, B Fenner, and A. M Rudoff, Addison Wesley, 2004) int daemon_init(const char *pname, int facility) {    int i;    pid_t pid;    pid = fork();    if (pid < 0) error("forking");    if (pid > 0) exit(0);  // parent process terminates    if (setsid() < 0) error("setsid");  // sets a new session id           //so that shell cannot send a kill signal    signal(SIGHUP, SIG_IGN);  // ignore the hangup signal    pid = fork();       if (pid > 0) exit(0);    //this guarantees that the child is not a session leader    //and so it cannot obtain a controlling terminal    chdir("/"); // change to the root directory    for(i=0;i < MAXFD;i++) close(i);    open("/dev/null",O_RDONLY);    open("/dev/null",O_RDWR);    open("/dev/null",O_RDWR);    // This guarantees that anything written to stdout or stderr will    // not cause a seg fault.    openlog(pname, gLOG_PID, facility);