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Use fchmodat(), fchownat(), and utimensat() to implement the SET_ATTR request rather than using the non-'at' variants of these functions. These can operate on a file descriptor path using the /proc file handle and "self/fd/N" filename to modify the attributes of a file without actually opening it, which means we can avoid problems like not being able to open a read-only file with O_RDWR, which happened previously with chmod requests. This means we don't need to open the file at all, except in the case of a request that needs to set the size, since there is no equivalent truncateat() function. BUG=chromium:1369647 TEST=touch /mnt/chromeos/MyFiles/Downloads/hello.txt TEST=chmod -w /mnt/chromeos/MyFiles/Downloads/hello.txt TEST=chmod +w /mnt/chromeos/MyFiles/Downloads/hello.txt TEST=chmod a-r /mnt/chromeos/MyFiles/Downloads/hello.txt TEST=chmod a+r /mnt/chromeos/MyFiles/Downloads/hello.txt TEST=chown $USER /mnt/chromeos/MyFiles/Downloads/hello.txt TEST=truncate -s1 /mnt/chromeos/MyFiles/Downloads/hello.txt Change-Id: I0461ed231cc78b26bcc37ede1a364af984c87f8b Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/3935537 Reviewed-by: Alexandre Courbot <acourbot@chromium.org> Reviewed-by: Keiichi Watanabe <keiichiw@chromium.org> Commit-Queue: Daniel Verkamp <dverkamp@chromium.org> |
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| assertions | ||
| audio_streams | ||
| balloon_control | ||
| cros-fuzz | ||
| cros_asyncv2 | ||
| data_model | ||
| p9 | ||
| sync | ||
| chromeos_warning.md | ||
| README.md | ||
Crosvm General Purpose Libraries
The crates in this folder are general purpose libraries used by other projects in ChromeOS as well.
To make them accessible independendly of crosvm, each of these crates is excluded from the crosvm workspace.