sysfs(2) sysfs(2)
NAME
sysfs - get file system type information
SYNOPSIS
#include <sys/fstyp.h>
#include <sys/fsid.h>
int sysfs(int opcode, const char *fsname);
int sysfs(int opcode, int fs_index, char *buf);
int sysfs(int opcode);
DESCRIPTION
sysfs returns information about the file system types configured in
the system. The number of arguments accepted by sysfs varies and
depends on the opcode. The currently recognized opcodes and their
functions are:
GETFSIND Translate fsname, a null-terminated file-system type
identifier, into a file-system type index.
GETFSTYP Translate fs_index, a file-system type index, into a
null-terminated file-system type identifier and write
it into the buffer pointed to by buf; this buffer must
be at least of size FSTYPSZ as defined in
<sys/fstyp.h>.
GETNFSTYP Return the total number of file system types configured
in the system.
sysfs fails if one or more of the following are true:
EINVAL fsname points to an invalid file-system identifier;
fs_index is zero, or invalid; opcode is invalid.
EFAULT buf or fsname points to an invalid user address.
DIAGNOSTICS
Upon successful completion, sysfs returns the file-system type index
if the opcode is GETFSIND, a value of 0 if the opcode is GETFSTYP, or
the number of file system types configured if the opcode is
GETNFSTYP. Otherwise, a value of -1 is returned and errno is set to
indicate the error.
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