Bug 592883
| Summary: | can not edit files on images mounted with guestmount cmd | ||||||
|---|---|---|---|---|---|---|---|
| Product: | [Community] Virtualization Tools | Reporter: | Pengzhen Cao <pcao> | ||||
| Component: | libguestfs | Assignee: | Richard W.M. Jones <rjones> | ||||
| Status: | CLOSED UPSTREAM | QA Contact: | |||||
| Severity: | high | Docs Contact: | |||||
| Priority: | high | ||||||
| Version: | unspecified | CC: | mbooth, virt-maint | ||||
| Target Milestone: | --- | ||||||
| Target Release: | --- | ||||||
| Hardware: | All | ||||||
| OS: | Linux | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2011-07-14 19:08:47 UTC | Type: | --- | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Bug Depends On: | 501889 | ||||||
| Bug Blocks: | |||||||
| Attachments: |
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I forgot about this, but it's just that we didn't implement the 'write' syscall: http://git.annexia.org/?p=libguestfs.git;a=blob;f=fuse/guestmount.c;h=27a4cef2e149027b06cefbfadf89ab64c4de4bc7;hb=HEAD#l649 So while in theory this is a simple fix, in fact it's a little more complex than that because it requires bug 501889 to be fixed first, and that requires some changes to the generator (see discussion of BufferIn in the TODO file here: http://libguestfs.org/TODO.txt ) Proposed fixes posted upstream: https://www.redhat.com/archives/libguestfs/2010-May/msg00113.html https://www.redhat.com/archives/libguestfs/2010-May/msg00114.html |
Created attachment 414504 [details] guestmount logs Description of problem: Can not edit the content of files mounted with guestmount cmd Version-Release number of selected component (if applicable): libguestfs-mount-1.2.3-1.fc12.6.x86_64, latest git version v1.3.13 How reproducible: 100% Steps to Reproduce: 1. create a blank image with guestfish 2. create several ascii files on it 3. mount the image with guestmount cmd, e.g.: guestmount -a /home/libguestfs-test/test.img -n -m /dev/sda1 /home/pcao/mnt --trace 4. using vi to create a new file or edit an existing file on "/home/pcao/mnt" Actual results: file can not be changed and got read-only error. Expected results: file should be changed Additional info: cp a file from host to the mount point , and echo sth to a file can not work either. However, truncate , chmod, ln could work.