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    Command:

    sysfs

    
    
    

    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  filesystem  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 filesystem identifier string fsname into a filesystem
              type index.
    
           2  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.
    
           3  Return the total number of filesystem types currently present in the
              kernel.
    
           The numbering of the filesystem type indexes begins with zero.
    
    
    

    RETURN VALUE

           On 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.
    
    
    

    ERRORS

           EFAULT Either fsname or buf is outside your accessible address space.
    
           EINVAL fsname is not a valid filesystem type  identifier;  fs_index  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           This  System-V  derived system call is obsolete; don't use it.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.
    
    
    

    Linux 2010-06-27 SYSFS(2)

    
    
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