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System Calls - Manual Reference Pages  - SYSFS (2)

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sysfs - get file system type information

CONTENTS

Synopsis
Description
Errors
Note
Bugs

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

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

int sysfs(int option);

sysfs() returns information about the file system 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 file-system identifier string fsname into a file-system type index.
2	Translate the file-system type index fs_index into a null-terminated file-system 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 file system types currently present in the kernel.

The numbering of the file-system type indexes begins with zero.

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

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

SVr4.

On Linux with the proc filesystem mounted on /proc, the same information can be derived from /proc/filesystems.

There is no libc or glibc support. There is no way to guess how large buf should be. or go to Top of page |  Section 2 |  Main Man Index.