Manpage of SYSFS

SYSFS

Section: Linux Programmer's Manual (2)
Updated: 2010-06-27
Index
 

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

sysfs() 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 optionin effect:
1
Translate the filesystem identifier string fsnameinto a filesystem type index.
2
Translate the filesystem type index fs_indexinto a null-terminated filesystem identifier string. This string will be written to the buffer pointed to by buf. Make sure that bufhas 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 errnois set appropriately.  

ERRORS

EFAULT
Either fsname or bufis outside your accessible address space.
EINVAL
fsnameis not a valid filesystem type identifier; fs_indexis out-of-bounds; optionis 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This System-V derived system call is obsolete; don't use it.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.


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
CONFORMING TO
NOTES
BUGS

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Time: 22:27:42 GMT, June 20, 2016