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Man Pages
explain_fstatfs_or_die(3) FreeBSD Library Functions Manual explain_fstatfs_or_die(3)

explain_fstatfs_or_die - get file system statistics and report errors

#include <libexplain/fstatfs.h>
void explain_fstatfs_or_die(int fildes, struct statfs *data);
 
int explain_fstatfs_on_error(int fildes, struct statfs *data);

The explain_fstatfs_or_die function is used to call the fstatfs(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_fstatfs(3) function, and then the process terminates by calling exit(EXIT_FAILURE).
The explain_fstatfs_on_error function is used to call the fstatfs(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_fstatfs(3) function, but still returns to the caller.
fildes
The fildes, exactly as to be passed to the fstatfs(2) system call.
data
The data, exactly as to be passed to the fstatfs(2) system call.

The explain_fstatfs_or_die function only returns on success, see fstatfs(2) for more information. On failure, prints an explanation and exits, it does not return.
The explain_fstatfs_on_error function always returns the value return by the wrapped fstatfs(2) system call.

The explain_fstatfs_or_die function is intended to be used in a fashion similar to the following example:
explain_fstatfs_or_die(fildes, data);

fstatfs(2)
get file system statistics
explain_fstatfs(3)
explain fstatfs(2) errors
exit(2)
terminate the calling process

libexplain version 1.3
 
Copyright (C) 2009 Peter Miller

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