AppImage/AppImageKit

--appimage-extract-and-run: mkdir_p error: Permission denied on FreeBSD

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#1,073 创建于 2020年9月3日

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buggood first issuehelp-wanted

描述

Trying to --appimage-extract-and-run a x86_64 Linux AppImage on FreeBSD 12.1-RELEASE-p8 with the Linux compatibility layer:

user@FreeBSD$  /home/user/Downloads/Akira-26-x86_64.AppImage --appimage-extract-and-run
mkdir_p error: Permission denied
Failed to extract AppImage

but

user@FreeBSD$  /home/user/Downloads/Akira-26-x86_64.AppImage --appimage-extract

user@FreeBSD$ truss /home/user/Downloads/Akira-26-x86_64.AppImage --appimage-extract-and-run 2>&1 | grep tmp
linux_access("/tmp/appimage_extracted_11b387e8ae9d3b2f6c030e4cfa7e8cc2/",F_OK) ERR#-2 'No such file or directory'
linux_mkdir("/tmp",493)                          ERR#-13 'Permission denied'

Doing manually:

user@FreeBSD$ mkdir -p /tmp/appimage_extracted_11b387e8ae9d3b2f6c030e4cfa7e8cc2/

works though, so why are we failing then?

贡献者指南

技术栈
cshell
领域
desktoptooling
议题类型
bug
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
half day
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
stale
清晰度议题是否清楚说明期望改动、验收标准和下一步。
mostly clear
前置要求
basic C knowledgeLinux compatibility layer on FreeBSD
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
30
研究方向
The issue is that mkdir p fails with permission denied on /tmp when running appimage extract and run, but manual mkdir works. Look at the source code for mkdir p in AppImageKit (likely in src/), especially how it constructs the path. Compare with the truss output showing linux mkdir failing; the issue might be related to the Linux compatibility layer's handling of permissions on /tmp. Check if the AppImage runtime is attempting to create the /tmp directory itself instead of just the subdirectory, or if there's a difference in how the mkdir system call is invoked.