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https://github.com/RGBCube/serenity
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0bbd9040ef
These 2 are an actual separate types of syscalls, so let's stop using special flags for bind mounting or re-mounting and instead let userspace calling directly for this kind of actions.
39 lines
1.3 KiB
Markdown
39 lines
1.3 KiB
Markdown
## Name
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bindmount - create a bindmount from `source_fd` to a target path.
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## Synopsis
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```**c++
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#include <LibCore/System.h>
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ErrorOr<void> bindmount(int source_fd, StringView target, int flags);
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```
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## Description
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`bindmount()` create a bindmount from `source_fd` to a target path `target`, with mount flags of `flags`.
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The following `flags` are supported:
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* `MS_NODEV`: Disallow opening any devices from this file system.
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* `MS_NOEXEC`: Disallow executing any executables from this file system.
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* `MS_NOSUID`: Ignore set-user-id bits on executables from this file system.
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* `MS_RDONLY`: Mount the filesystem read-only.
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* `MS_WXALLOWED`: Allow W^X protection circumvention for executables on this file system.
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* `MS_AXALLOWED`: Allow anonymous executable mappings for executables on this file system.
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* `MS_NOREGULAR`: Disallow opening any regular files from this file system.
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These flags can be used as a security measure to limit the possible abuses of the mounted file system.
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## Errors
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* `EINVAL`: The `flags` value contains deprecated flags such as `MS_REMOUNT` or `MS_BIND`.
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* `EPERM`: The current process does not have superuser privileges.
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* `ENODEV`: The `source_fd` is not an open file descriptor to a valid filesystem inode.
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All of the usual path resolution errors may also occur.
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## See also
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* [`mount`(2)](help://man/2/mount)
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