Stevens and Rago write in "Advanced Programming in the Unix Environment":
The vfork function originated with 2.9BSD. Some consider the function a blemish, but all the platforms covered in this book support it. In fact, the BSD developers removed it from the 4.4BSD release, but all the open source BSD distributions that derive from 4.4BSD add support for it back into their own releases. The vfork function is marked as an obsolete interface in Version 3 of the Single UNIX Specification.

In reply to Re^2: backticks and 'Cannot allocate memory' by JavaFan
in thread backticks and 'Cannot allocate memory' by NetWallah

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