Editing File descriptor (section)

==<code>at</code> suffix operations==
A series of new operations has been added to many modern Unix-like systems, as well as numerous C libraries, to be standardized in a future version of [[POSIX]].<ref>{{cite book
  | title = Extended API Set, Part 2
  | publisher = The Open Group
  | date = October 2006
  | url = https://www2.opengroup.org/ogsys/catalog/c063
  | url-access = registration
  | isbn = 1931624674}}</ref> The <code>at</code> suffix signifies that the function takes an additional first argument supplying a file descriptor from which [[relative path]]s are resolved, the forms lacking the <code>at</code> suffix thus becoming equivalent to passing a file descriptor corresponding to the current [[working directory]]. The purpose of these new operations is to defend against a certain class of [[Time-of-check-to-time-of-use|TOCTOU]] attacks.

*{{mono|openat()}}
*{{mono|faccessat()}}
*{{mono|fchmodat()}}
*{{mono|fchownat()}}
*{{mono|fstatat()}}
*{{mono|futimesat()}}
*{{mono|linkat()}}
*{{mono|mkdirat()}}
*{{mono|mknodat()}}
*{{mono|readlinkat()}}
*{{mono|renameat()}}
*{{mono|symlinkat()}}
*{{mono|unlinkat()}}
*{{mono|mkfifoat()}}
*{{mono|fdopendir()}}