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SYSFS

Section: Linux Programmer's Manual (2)
Updated: 2017-09-15
Index Return to Main Contents
 

NAME

sysfs - get filesystem type information  

SYNOPSIS

int sysfs(int option, const char *fsname);

int sysfs(int option, unsigned int fs_index, char *buf);

int sysfs(int option);  

DESCRIPTION

Note: if you are looking for information about the sysfs filesystem that is normally mounted at /sys, see sysfs(5).

The (obsolete) sysfs() system call returns information about the filesystem types currently present in the kernel. The specific form of the sysfs() call and the information returned depends on the option in effect:

1
Translate the filesystem identifier string fsname into a filesystem type index.
2
Translate the filesystem type index fs_index into a null-terminated filesystem identifier string. This string will be written to the buffer pointed to by buf. Make sure that buf has enough space to accept the string.
3
Return the total number of filesystem types currently present in the kernel.

The numbering of the filesystem type indexes begins with zero.  

RETURN VALUE

On success, sysfs() returns the filesystem index for option 1, zero for option 2, and the number of currently configured filesystems for option 3. On error, -1 is returned, and errno is set appropriately.  

ERRORS

EFAULT
Either fsname or buf is outside your accessible address space.
EINVAL
fsname is not a valid filesystem type identifier; fs_index is out-of-bounds; option is invalid.
 

CONFORMING TO

SVr4.  

NOTES

This System-V derived system call is obsolete; don't use it. On systems with /proc, the same information can be obtained via /proc/filesystems; use that interface instead.  

BUGS

There is no libc or glibc support. There is no way to guess how large buf should be.  

COLOPHON

This page is part of release 4.13 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
CONFORMING TO
NOTES
BUGS
COLOPHON





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