Archipelago » qemu

/* file descriptors passed via SCM_RIGHTS */

typedef struct mon_fd_t mon_fd_t;

struct mon_fd_t {

    char *name;

    int fd;

    LIST_ENTRY(mon_fd_t) next;

};

    LIST_HEAD(,mon_fd_t) fds;

static void do_getfd(Monitor *mon, const char *fdname)

{

    mon_fd_t *monfd;

    int fd;

    fd = qemu_chr_get_msgfd(mon->chr);

    if (fd == -1) {

        monitor_printf(mon, "getfd: no file descriptor supplied via SCM_RIGHTS\n");

        return;

    }

    if (qemu_isdigit(fdname[0])) {

        monitor_printf(mon, "getfd: monitor names may not begin with a number\n");

        return;

    }

    fd = dup(fd);

    if (fd == -1) {

        monitor_printf(mon, "Failed to dup() file descriptor: %s\n",

                       strerror(errno));

        return;

    }

    LIST_FOREACH(monfd, &mon->fds, next) {

        if (strcmp(monfd->name, fdname) != 0) {

            continue;

        }

        close(monfd->fd);

        monfd->fd = fd;

        return;

    }

    monfd = qemu_mallocz(sizeof(mon_fd_t));

    monfd->name = qemu_strdup(fdname);

    monfd->fd = fd;

    LIST_INSERT_HEAD(&mon->fds, monfd, next);

}

static void do_closefd(Monitor *mon, const char *fdname)

{

    mon_fd_t *monfd;

    LIST_FOREACH(monfd, &mon->fds, next) {

        if (strcmp(monfd->name, fdname) != 0) {

            continue;

        }

        LIST_REMOVE(monfd, next);

        close(monfd->fd);

        qemu_free(monfd->name);

        qemu_free(monfd);

        return;

    }

    monitor_printf(mon, "Failed to find file descriptor named %s\n",

                   fdname);

}