DOKK / manpages / debian 12 / libexplain-dev / explain_mount_or_die.3.en
explain_mount_or_die(3) Library Functions Manual explain_mount_or_die(3)

explain_mount_or_die - mount file system and report errors

#include <libexplain/mount.h>

void explain_mount_or_die(const char *source, const char *target, const char *file_systems_type, unsigned long flags, const void *data);
int explain_mount_on_error(const char *source, const char *target, const char *file_systems_type, unsigned long flags, const void *data);

The explain_mount_or_die function is used to call the mount(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_mount(3) function, and then the process terminates by calling exit(EXIT_FAILURE).

The explain_mount_on_error function is used to call the mount(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_mount(3) function, but still returns to the caller.

The source, exactly as to be passed to the mount(2) system call.
The target, exactly as to be passed to the mount(2) system call.
The file_systems_type, exactly as to be passed to the mount(2) system call.
The flags, exactly as to be passed to the mount(2) system call.
The data, exactly as to be passed to the mount(2) system call.

The explain_mount_or_die function only returns on success, see mount(2) for more information. On failure, prints an explanation and exits, it does not return.

The explain_mount_on_error function always returns the value return by the wrapped mount(2) system call.

The explain_mount_or_die function is intended to be used in a fashion similar to the following example:

explain_mount_or_die(source, target, file_systems_type, flags, data);

mount(2)
mount file system
explain_mount(3)
explain mount(2) errors
exit(2)
terminate the calling process

libexplain version 1.4
Copyright (C) 2013 Peter Miller