Return a list of <interface> objects, each denoting a configured network interface. This is implemented using the 'getifaddrs' libc function.

Return #t if the block DEVICE is in use, #f otherwise. This is inspired from fdisk_device_is_used function of util-linux. This is particularly useful for devices that do not appear in /proc/self/mounts like overlayfs lowerdir backend device.

Wait and acquire an exclusive lock on FILE. Return an open port according to MODE.

Return the list of entries read from the user accounting database.

Create a new child process by duplicating the current parent process. Unlike the fork system call, clone accepts FLAGS that specify which resources are shared between the parent and child processes.

This procedure improves on Guile's 'scandir' procedure in several ways:

1. Systematically encode decode file names using STRING->POINTER and POINTER->STRING (UTF-8 by default; this works around a defect in Guile 2.0/2.2 where 'scandir' decodes file names according to the current locale, which is not always desirable.

2. Each entry that is returned has the form (NAME . PROPERTIES). PROPERTIES is an alist showing additional properties about the entry, as found in 'struct dirent'. An entry may look like this:

("foo.scm" (type . regular) (inode . 123456))

Callers must be prepared to deal with the case where 'type' is 'unknown' since some file systems do not provide that information.

3. Raise to 'system-error' when NAME cannot be opened.

Return two values: the major and minor device numbers that make up DEVICE.

Add a network route for DESTINATION (a socket address as returned by 'make-socket-address') that goes through GATEWAY (a socket address). For instance, the call:

(add-network-route/gateway sock (make-socket-address AF_INET (inet-pton AF_INET "192.168.0.1") 0))

is equivalent to this 'net-tools' command:

route add -net default gw 192.168.0.1

because the default value of DESTINATION is "0.0.0.0".