移植代码：在Linux中是否存在与utssys（）等效的API？我需要将utssys（）unix API移植到Linux环境中吗？

utssys() in unix gives the total numbers of users on a file.Its a undocumented API , there is no manual entry for this API neither in Solaris man page nor in Linux man page.Is there any equivalent API in Linux OR i can use the same in Linux also(I don't know as its undocumented). I googled it also but did not get any info as such.please help. utssys() in unix gives the total numbers of use