SYSFS Section: Linux Programmer's Manual (2) Updated: 9 August 2025 Index   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. 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 EINVAL fsname is not a valid file-system type identifier; fs_index is out-of-bounds; option is invalid. EFAULT Either fsname or buf is outside your accessible address space.   CONFORMING TO SVr4.   Index NAME SYNOPSIS DESCRIPTION RETURN VALUE ERRORS CONFORMING TO This document was created by using the manual pages. Time: 11:56:07 GMT, March 24, 2025