Return the width of a string as it would be printed on the terminal. This procedure accounts for characters that have a different width than 1, such as CJK double-width characters.

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.

Flush buffered output of PORT, an output file port, and then call fdatasync(2) on the underlying file descriptor.

Load for eventual use of kexec(8) the Linux kernel from kernel-fd, its initial RAM disk from initrd-fd, with the given command-line (a string). Optionally, flags can be a bitwise or of the KEXEC_FILE_* constants.

Return the mount flags of MOUNT, a <mount> record, as an inclusive or of MS_* constants.

Stop using block special device DEVICE for swapping.

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.

Set the address of network interface NAME to SOCKADDR.

Return the list of mounts (<mount> records) visible in the namespace of the current process.

Reassociate the current process with the namespace specified by FDES, a file descriptor obtained by opening a /proc/PID/ns/* file. NSTYPE specifies which type of namespace the current process may be reassociated with, or 0 if there is no such limitation.

Use the block special device at DEVICE for swapping.