NAME
sysfs - get file system type information SYNOPSIS int sysfs(int option, const char *fsname); int sysfs(int option, unsigned int fsindex, 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-sys‐ tem type index.
2 Translate the file-system type index fsindex 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. 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; fsindex is
out-of-bounds; option is invalid. CONFORMING TO SVr4. NOTES
This System-V derived system call is obsolete; don't use it. On sys‐ tems 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 3.53 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/.
Linux 2010-06-27 SYSFS(2)