cc: tina.harriott.mathemat...@gmail.com Subject: Re: [ast-users] Edit 10GB file with fixed size records --------
> Does ksh have an API to edit a file at a specific position pos1, read > n1 bytes, and write n1 bytes at that position without truncating the > file? I need this to do edit a file in place without reading and > writing it completely each time. > > Tina > -- > Tina Harriott - Women in Mathematics > Contact: tina.harriott.mathemat...@gmail.com Yes, it does. The redirection operator <> opens the file for reading and writing. The operator <# can be used to seek to a location in the file. If it is followed by ((expr)) it is evaluated as an arithmetic expression to get the seek pointer. If followed by a string, it seeks to the next line containing that string. read -N n1 reads count bytes that the current location and printf can be use to write n1 bytes after seeking back. David Korn d...@research.att.com _______________________________________________ ast-users mailing list ast-users@lists.research.att.com http://lists.research.att.com/mailman/listinfo/ast-users
