c# - Reading an unfinished gzip file -

i creating file using cygwin bash script on remote:

(echo $$ > tail.pid; exec tail -f -n+0 --retry fix.log) | gzip -c >> /faraway/log.gz 

at same time, on local machine, reading /faraway/log.gz in c# using:

    txtfilereader = new streamreader(new gzipstream(new filestream(@"log.gz"), filemode.open, fileaccess.read, fileshare.readwrite), compressionmode.decompress, true));      bool isdone = false; // set true when "done.txt" file appears signal log.gz completed      while (true)  // read until finished     {             if (!isdone)             {                 if (txtfilereader.peek() == -1) // wait if file still being transferred                 {                      while (!file.exists(@"done.txt"))                     {                          thread.sleep(10000);                     }                     isdone = true;                      // goes wrong here when gzip closes on remote                                         }             }              if ((line = txtfilereader.readline()) == null)             {                     return "";                 }     } 

i have indicated point in code think goes wrong.

when (peek() == -1) , gzip still running (i.e. slow transfer data) next readline works correctly, when gzip closed on remote, next readline not return correct line - returns random part of line.

later, when zcat file, see correct lines infact sent. appears losing "position" in gzipstream when gzip shuts down.

what happens when gzip closes? affect written?