Copyright (C) 1995, Thomas K. Dyas <firstname.lastname@example.org> %%%LICENSE_START(VERBATIM) Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and this permission notice are preserved on all copies. Permission is granted to copy and distribute modified versions of this manual under the conditions for verbatim copying, provided that the entire resulting derived work is distributed under the terms of a permission notice identical to this one. ...
NAMEsysfs - get filesystem type information
SYNOPSISint sysfs(int option, const char *fsname);
int sysfs(int option, unsigned int fs_index, char *buf);
int sysfs(int option);
DESCRIPTIONNote: 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:
- Translate the filesystem identifier string fsname into a filesystem type index.
- 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.
- Return the total number of filesystem types currently present in the kernel.
The numbering of the filesystem type indexes begins with zero.
RETURN VALUEOn 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.
- Either fsname or buf is outside your accessible address space.
- fsname is not a valid filesystem type identifier; fs_index is out-of-bounds; option is invalid.