NAME
sysfs - get file system 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 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. |
RETURN VALUE
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.
ERRORS
| 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. |
CONFORMING TO
SVr4.
NOTES
On Linux with the proc file system mounted on /proc, the same information can be derived from /proc/filesystems.
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 3.23 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.
