Пример #1
0
/*
 * Opens a file with FD_CLOEXEC set
 */
int qemu_open(const char *name, int flags, ...)
{
    int ret;
    int mode = 0;

#ifndef _WIN32
    const char *fdset_id_str;

    /* Attempt dup of fd from fd set */
    if (strstart(name, "/dev/fdset/", &fdset_id_str)) {
        int64_t fdset_id;
        int fd, dupfd;

        fdset_id = qemu_parse_fdset(fdset_id_str);
        if (fdset_id == -1) {
            errno = EINVAL;
            return -1;
        }

        fd = monitor_fdset_get_fd(fdset_id, flags);
        if (fd == -1) {
            return -1;
        }

        dupfd = qemu_dup_flags(fd, flags);
        if (dupfd == -1) {
            return -1;
        }

        ret = monitor_fdset_dup_fd_add(fdset_id, dupfd);
        if (ret == -1) {
            close(dupfd);
            errno = EINVAL;
            return -1;
        }

        return dupfd;
    }
#endif

    if (flags & O_CREAT) {
        va_list ap;

        va_start(ap, flags);
        mode = va_arg(ap, int);
        va_end(ap);
    }
Пример #2
0
Файл: osdep.c Проект: 8tab/qemu
int qemu_lock_fd_test(int fd, int64_t start, int64_t len, bool exclusive)
{
    int ret;
    struct flock fl = {
        .l_whence = SEEK_SET,
        .l_start  = start,
        .l_len    = len,
        .l_type   = exclusive ? F_WRLCK : F_RDLCK,
    };
    qemu_probe_lock_ops();
    ret = fcntl(fd, fcntl_op_getlk, &fl);
    if (ret == -1) {
        return -errno;
    } else {
        return fl.l_type == F_UNLCK ? 0 : -EAGAIN;
    }
}
#endif

/*
 * Opens a file with FD_CLOEXEC set
 */
int qemu_open(const char *name, int flags, ...)
{
    int ret;
    int mode = 0;

#ifndef _WIN32
    const char *fdset_id_str;

    /* Attempt dup of fd from fd set */
    if (strstart(name, "/dev/fdset/", &fdset_id_str)) {
        int64_t fdset_id;
        int fd, dupfd;

        fdset_id = qemu_parse_fdset(fdset_id_str);
        if (fdset_id == -1) {
            errno = EINVAL;
            return -1;
        }

        fd = monitor_fdset_get_fd(fdset_id, flags);
        if (fd == -1) {
            return -1;
        }

        dupfd = qemu_dup_flags(fd, flags);
        if (dupfd == -1) {
            return -1;
        }

        ret = monitor_fdset_dup_fd_add(fdset_id, dupfd);
        if (ret == -1) {
            close(dupfd);
            errno = EINVAL;
            return -1;
        }

        return dupfd;
    }
#endif

    if (flags & O_CREAT) {
        va_list ap;

        va_start(ap, flags);
        mode = va_arg(ap, int);
        va_end(ap);
    }