SYSFS(2)SYSFS(2)NAMEsysfs - 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
The sysfs() function returns information about the file system types
configured in the system. The number of arguments accepted by sysfs()
depends on the opcode argument, which can take the following values:
GETFSIND
Translate fsname, a null-terminated file-system type iden‐
tifier, 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, which 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.
RETURN VALUES
Upon successful completion, the value returned depends upon the opcode
argument as follows:
GETFSIND
the file-system type index
GETFSTYP
0
GETNFSTYP
the number of file system types configured
Otherwise, −1 is returned and errno is set to indicate the error.
ERRORS
The sysfs() function will fail if:
EFAULT
The buf or fsname argument points to an illegal address.
EINVAL
The fsname argument points to an invalid file-system identi‐
fier; the fs_index argument is 0 or invalid; or the opcode
argument is invalid.
Jul 5, 1990 SYSFS(2)
