avc_sid_to_context - Linux
Overview
The avc_sid_to_context command is a powerful tool for converting a Security Identification (SID) into the corresponding Security Context (SELinux Context). This translation is particularly useful in security analysis, troubleshooting, and system auditing.
Syntax
avc_sid_to_context [options] <sid>
Options/Flags
- -V, –version: Display version information and exit.
- -h, –help: Display usage and exit.
- -t, –type: Specify SID type (default: sid). Possible values are: sid, sidcontext, user, role, type, range, avtab.
- -n: Print the context in the format used by the kernel.
Examples
Convert SID to Context
To convert a SID to a SELinux context:
avc_sid_to_context s0
Convert User or Role SID to Context
To retrieve the context associated with a user or role, specify the -t option:
avc_sid_to_context -t user s0-s0
Output Kernel-Formatted Context
To output the context in the format used by the Linux kernel, use the -n option:
avc_sid_to_context -n s0
Common Issues
- Invalid SID: The specified SID may be invalid or in an unrecognized format. Ensure that the SID is correct.
- Permission Denied: You may require root privileges to execute this command. Try running the command with
sudo.
Integration
avc_sid_to_context can be used in conjunction with other SELinux-related tools:
- ausearch: To analyze SELinux audit logs.
- getenforce: To determine the current SELinux enforcement mode.
- setenforce: To modify the SELinux enforcement mode.
Related Commands
getseboolsetseboolchecksemac