cap_from_name - Linux

Overview

cap_from_name converts a capability name to a capability value. It is used to map symbolic capability names to their corresponding numeric values.

Syntax

cap_from_name CAPABILITY

• CAPABILITY: The symbolic capability name to convert to a value.

Options/Flags

None.

Examples

• Convert the capability name "CAP_SYS_ADMIN" to a value:

$ cap_from_name CAP_SYS_ADMIN
1

• Convert multiple capability names to values:

$ cap_from_name CAP_SYS_ADMIN CAP_DAC_READ_SEARCH CAP_SYS_PTRACE
1 0 7

Common Issues

• Unknown Capability Name: If the provided capability name is not recognized, cap_from_name will return "0" to indicate an error.

Integration

cap_from_name can be used in conjunction with other Linux commands, such as cap_setcap, to modify the capabilities associated with files or processes. For example:

$ cap_getcap FILE | cap_from_name CAPABILITY_1 CAPABILITY_2

Related Commands

• cap_setcap: Sets the capabilities of a file or process.
• cap_getcap: Gets the capabilities of a file or process.
• cap_to_name: Converts a capability value to a capability name.