CAPNG\_APPLY\_CAPS\_FD(3) Libcap-ng API CAPNG\_APPLY\_CAPS\_FD(3)

# [NAME](#NAME)

capng\_apply\_caps\_fd - write file-based capabilities to extended attributes

# [SYNOPSIS](#SYNOPSIS)

**#include <cap-ng.h>**

int capng\_apply\_caps\_fd(int fd);

# [DESCRIPTION](#DESCRIPTION)

This function will write the file based capabilities to the extended attributes of the file that the descriptor was opened against. The bounding set is not included in file based capabilities operations. Note that this function will only work if compiled on a kernel that supports file based capabilities such as 2.6.2 6 and later.

# [RETURN VALUE](#RETURN_VALUE)

This returns 0 on success, -1 if something besides a regular file is passed or the extended attribute operation fails, and -2 if the file capability data cannot be serialized.

# [SEE ALSO](#SEE_ALSO)

[**capng\_get\_caps\_fd**(3)](/man/os/libcap-ng/capng_get_caps_fd.3), [**capabilities**(7)](/man/os/libcap-ng/capabilities.7)

# [AUTHOR](#AUTHOR)

Steve Grubb

Sept 2020 Red Hat

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Document: capng_apply_caps_fd(3) from libcap-ng 0.9.6-r1 (Chainguard OS)
Source: https://github.com/stevegrubb/libcap-ng.git