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libssh2_sftp_symlink: wrong order of arguments

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维护者通常 1 天内回复

还没有人认领这个 Issue。

评估

难度
4/5
预计耗时
3-5 天
新手友好度
48/100
Issue 类型
缺陷
描述清晰度
基本清楚
活跃度
活跃
技术栈
c
领域
backend

调研方向

Start by reading the libssh2_sftp_symlink_ex implementation in src/sftp.c near line 3687 and compare its argument handling with the SFTP extension behavior described in the issue. Check related symlink tests and callers to understand compatibility expectations; done means the function handles the argument order correctly without breaking existing behavior, with tests covering the expected paths.

由索引模型根据 Issue 内容生成。

描述

documentation

I believe this function implementation has never worked correctly!?

/include/libssh2_sftp.h:

#define libssh2_sftp_symlink(sftp, orig, linkpath) \
    libssh2_sftp_symlink_ex((sftp), orig, (unsigned int)strlen(orig), \
                            linkpath, (unsigned int)strlen(linkpath), \
                            LIBSSH2_SFTP_SYMLINK)

Because:

https://www.sftp.net/spec/openssh-sftp-extensions.txt

When OpenSSH's sftp-server was implemented, the order of the arguments
to the SSH_FXP_SYMLINK method was inadvertently reversed. Unfortunately,
the reversal was not noticed until the server was widely deployed. Since
fixing this to follow the specification would cause incompatibility, the
current order was retained. For correct operation, clients should send
SSH_FXP_SYMLINK as follows:

	uint32		id
	string		targetpath
	string		linkpath

In my code, I'm simply reversing the arguments, but I think this should better be fixed at the source, inside:
https://github.com/libssh2/libssh2/blob/a951e06640c8432eba70f01efe85b10ec5f80119/src/sftp.c#L3687

主要语言
C
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  • 没有贡献指南

从这里开始

  1. 先读完整个 Issue,再读项目的贡献指南。
  2. 在 Issue 下留言说明你要接手 —— 这能避免两个人做同样的事。
  3. Fork 仓库,在一个分支上完成修改。
  4. 提交 Pull Request,并在描述里引用这个 Issue 编号。

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