Путеводитель по Руководству Linux
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   open    ( 2 )

открыть и, возможно, создать файл (open and possibly create a file)
  Name  |  Synopsis  |  Description  |  Return value  |  Error  |  Versions  |    Conforming to    |  Note  |  Bugs  |  See also  |

Стандарты (Conforming to)

open(), creat() SVr4, 4.3BSD, POSIX.1-2001, POSIX.1-2008.


       openat(): POSIX.1-2008.


       openat2(2) is Linux-specific.


       The O_DIRECT, O_NOATIME, O_PATH, and O_TMPFILE flags are Linux-
       specific.  One must define _GNU_SOURCE to obtain their
       definitions.


       The O_CLOEXEC, O_DIRECTORY, and O_NOFOLLOW flags are not
       specified in POSIX.1-2001, but are specified in POSIX.1-2008.
       Since glibc 2.12, one can obtain their definitions by defining
       either _POSIX_C_SOURCE with a value greater than or equal to
       200809L or _XOPEN_SOURCE with a value greater than or equal to
       700.  In glibc 2.11 and earlier, one obtains the definitions by
       defining _GNU_SOURCE.


       As noted in feature_test_macros(7), feature test macros such as
       _POSIX_C_SOURCE, _XOPEN_SOURCE, and _GNU_SOURCE must be defined
       before including any header files.