capng_print_caps_text - Linux

Overview

capng_print_caps_text is a command-line tool that displays the Capability NG (cap_ng) capabilities of a file, process, or thread in human-readable text format. Cap_ng is a modern alternative to the traditional POSIX.1e capabilities system and provides finer-grained control over process privileges.

Syntax

capng_print_caps_text [options] <target>

Where:

• target is the path to a file, process ID, or thread ID for which to display capabilities.

Options/Flags

• -F: Display capabilities in a format suitable for parsing by the capng_set_caps_text command.
• -S: Display capabilities in a format suitable for parsing by the seccomp_ruleset command.
• -q: Quiet mode – only print capabilities that differ from the initial set.
• -v: Verbose mode – print additional information about capabilities.

Examples

To display the capabilities of a file:

capng_print_caps_text /bin/bash

To display the capabilities of a process:

capng_print_caps_text 1234

To display the capabilities of a thread:

capng_print_caps_text -v 1234:1

Common Issues

• Error: Unknown file type: This error occurs when the specified file is not a file, process, or thread. Ensure that the target is a valid object type.
• Error: Permission denied: This error occurs when the user does not have sufficient permissions to access the target or view its capabilities. Check permissions and ensure the user has necessary access rights.

Integration

capng_print_caps_text can be integrated into scripts or command chains for automating tasks related to capability management:

• Combine with capng_set_caps_text to modify capabilities of a target.
• Use with seccomp_ruleset to analyze capabilities and create seccomp filter rules.

Related Commands

• setcap: Set POSIX.1e capabilities on a file.
• capng_set_caps_text: Set cap_ng capabilities on a target.
• seccomp_ruleset: Generate seccomp filter rules based on capabilities.