这篇教程C++ vfs_writev函数代码示例写得很实用，希望能帮到您。
本文整理汇总了C++中vfs_writev函数的典型用法代码示例。如果您正苦于以下问题：C++ vfs_writev函数的具体用法？C++ vfs_writev怎么用？C++ vfs_writev使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。 在下文中一共展示了vfs_writev函数的9个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。 示例1: rumpcomp_virtif_sendvoidrumpcomp_virtif_send(struct virtif_user *vu, struct iovec *iov, size_t niov){ mm_segment_t oseg; loff_t off = 0; ssize_t nn; oseg = get_fs(); set_fs(get_ds()); /* something is written, rest (if any) is dropped */ KLOCK_WRAP(nn = vfs_writev(vu->tapfile, iov, niov, &off)); set_fs(oseg);}
开发者ID:jaimeyu，项目名称:rumpuser-linuxkernel，代码行数:13，
示例2: sys_writevasmlinkage ssize_tsys_writev(unsigned long fd, const struct iovec __user *vec, unsigned long vlen){ struct file *file; ssize_t ret = -EBADF; int fput_needed; file = fget_light(fd, &fput_needed); if (file) { ret = vfs_writev(file, vec, vlen, &file->f_pos); fput_light(file, fput_needed); } return ret;}
开发者ID:OS2World，项目名称:DRV-LXAPI32，代码行数:15，
示例3: log_to_exception/** * tag: the tag of this command * msg: concrete command string to write to /dev/log/exception * return: on success return the bytes writed successfully, on error return -1 **/int log_to_exception(char* tag, char* msg){ mm_segment_t oldfs; struct file *file; unsigned char * prio_err = "6";//ANDROID_ERROR int ret = 0; struct iovec vec[3]; if(NULL == tag || NULL == msg) { pr_err("log_exception: the arguments invalidate/n"); return -1; } oldfs = get_fs(); set_fs(KERNEL_DS); file = filp_open(LOG_EXCEPTION_FS,O_RDWR,0); if(!file || IS_ERR(file)) { pr_err("log_exception: Failed to access /dev/log/exception/n"); set_fs(oldfs); return -1; } vec[0].iov_base = prio_err; vec[0].iov_len = 1; vec[1].iov_base = tag; vec[1].iov_len = strlen(tag) + 1; vec[2].iov_base = msg; vec[2].iov_len = strlen(msg)+1; ret = vfs_writev(file, &vec[0], 3, &file->f_pos); if(ret < 0) { pr_err("log_exception: Failed to write to /dev/log/exception/n"); filp_close(file, NULL); set_fs(oldfs); return -1; } filp_close(file, NULL); set_fs(oldfs); return ret;}
开发者ID:printusrzero，项目名称:hwp6s-kernel，代码行数:52，
示例4: SYSCALL_DEFINE3SYSCALL_DEFINE3(writev, unsigned long, fd, const struct iovec __user *, vec, unsigned long, vlen){ struct fd f = fdget(fd); ssize_t ret = -EBADF; if (f.file) { loff_t pos = file_pos_read(f.file); ret = vfs_writev(f.file, vec, vlen, &pos); file_pos_write(f.file, pos); fdput(f); } if (ret > 0) add_wchar(current, ret); inc_syscw(current); return ret;}
开发者ID:dkati，项目名称:Hulk-Kernel-V2，代码行数:18，
示例5: do_writevstatic ssize_t do_writev(unsigned long fd, const struct iovec __user *vec, unsigned long vlen, int flags){ struct fd f = fdget_pos(fd); ssize_t ret = -EBADF; if (f.file) { loff_t pos = file_pos_read(f.file); ret = vfs_writev(f.file, vec, vlen, &pos, flags); if (ret >= 0) file_pos_write(f.file, pos); fdput_pos(f); } if (ret > 0) add_wchar(current, ret); inc_syscw(current); return ret;}
开发者ID:020gzh，项目名称:linux，代码行数:19，
示例6: SYSCALL_DEFINE3SYSCALL_DEFINE3(writev, unsigned long, fd, const struct iovec __user *, vec, unsigned long, vlen){ struct file *file; ssize_t ret = -EBADF; int fput_needed; file = fget_light(fd, &fput_needed); if (file) { loff_t pos = file_pos_read(file); ret = vfs_writev(file, vec, vlen, &pos); file_pos_write(file, pos); fput_light(file, fput_needed); } if (ret > 0) add_wchar(current, ret); inc_syscw(current); return ret;}
开发者ID:kuailexs，项目名称:A820_kernel，代码行数:20，
示例7: do_pwritevstatic ssize_t do_pwritev(unsigned long fd, const struct iovec __user *vec, unsigned long vlen, loff_t pos, int flags){ struct fd f; ssize_t ret = -EBADF; if (pos < 0) return -EINVAL; f = fdget(fd); if (f.file) { ret = -ESPIPE; if (f.file->f_mode & FMODE_PWRITE) ret = vfs_writev(f.file, vec, vlen, &pos, flags); fdput(f); } if (ret > 0) add_wchar(current, ret); inc_syscw(current); return ret;}
开发者ID:020gzh，项目名称:linux，代码行数:22，
示例8: fd_do_writevstatic int fd_do_writev(struct se_task *task){ struct fd_request *req = FILE_REQ(task); struct se_device *se_dev = req->fd_task.task_se_cmd->se_dev; struct fd_dev *dev = se_dev->dev_ptr; struct file *fd = dev->fd_file; struct scatterlist *sg = task->task_sg; struct iovec *iov; mm_segment_t old_fs; loff_t pos = (task->task_lba * se_dev->se_sub_dev->se_dev_attrib.block_size); int ret, i = 0; iov = kzalloc(sizeof(struct iovec) * task->task_sg_nents, GFP_KERNEL); if (!iov) { pr_err("Unable to allocate fd_do_writev iov[]/n"); return -ENOMEM; } for (i = 0; i < task->task_sg_nents; i++) { iov[i].iov_len = sg[i].length; iov[i].iov_base = sg_virt(&sg[i]); } old_fs = get_fs(); set_fs(get_ds()); ret = vfs_writev(fd, &iov[0], task->task_sg_nents, &pos); set_fs(old_fs); kfree(iov); if (ret < 0 || ret != task->task_size) { pr_err("vfs_writev() returned %d/n", ret); return (ret < 0 ? ret : -EINVAL); } return 1;}
开发者ID:SSKain，项目名称:linux-2.6-imx，代码行数:38，
示例9: SYSCALL_DEFINE5SYSCALL_DEFINE5(pwritev, unsigned long, fd, const struct iovec __user *, vec, unsigned long, vlen, unsigned long, pos_l, unsigned long, pos_h){ loff_t pos = pos_from_hilo(pos_h, pos_l); struct fd f; ssize_t ret = -EBADF; if (pos < 0) return -EINVAL; f = fdget(fd); if (f.file) { ret = -ESPIPE; if (f.file->f_mode & FMODE_PWRITE) ret = vfs_writev(f.file, vec, vlen, &pos); fdput(f); } if (ret > 0) add_wchar(current, ret); inc_syscw(current); return ret;}
开发者ID:dkati，项目名称:Hulk-Kernel-V2，代码行数:23，
注：本文中的vfs_writev函数示例整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。
C++ vfscanf函数代码示例
C++ vfs_unlink函数代码示例 |
