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| -rw-r--r-- | txr.1 | 34 |
1 files changed, 34 insertions, 0 deletions
@@ -80078,6 +80078,7 @@ or to request a shared or private mapping, respectively. If a mapping is requested which is neither shared nor private, the underlying POSIX function will likely fail. + If a .meta source is specified, indicating a filesystem object to be mapped, the @@ -80089,6 +80090,39 @@ In this situation, the .code map-anon flag must be present. +The +.meta source +argument may be an integer file descriptor. If so, this value +will be passed to the underlying POSIX function directly. +The +.meta source +argument may be a stream object, in which case the +.code fileno +function will be applied to it, which must retrieve an integer +file descriptor which will be passed to the POSIX function. +The +.meta source +argument may be a filename. The specified file is opened as if via +.codn open-file , +with a +.meta mode-string +which is +.str "r+" +if the +.meta prot +argument includes the +.code prot-write +flag, otherwise +.strn "r" . +The integer file descriptor from this open stream is used in the underlying +.code mmap +call. The file is immediately closed when +.code mmap +returns. In all cases, the integer file descriptor passed to the POSIX +function must be a value suitable for conversion to the +.code int +type. + Note: in the context of .codn mmap , "anonymous" means "not associated with a filesystem object referenced by a |