The latest version of tcsh has a problem with the built-in echo. When echo is used to write to a file from within a script, and then the script runs a program that attempts to open the file, the program is not able to open the file.
The attachment has a sample program, fortopen.f, which gave the problem when compiled with the Intel Fortran compiler. A C program using fopen did not show the problem. The problem also does not occur when the program is compiled with g77 under Cygwin. The executable made the tar file too large for your mail program, so it is not included. (Please tell me a better email address to use if you need it from me.) The script echotest uses echo to write to a file, then runs fortopen which tries to open the file. It does it first with echo piped to cat, and with /bin/echo, which do not fail, then it does it with the built-in echo, which fails with permission denied. The problem occurs only with tcsh 6.13, not tcsh 6.12 (see two output files). I am running Windows XP SP1. Thanks. David Mastronarde
echobug.tar.gz
Description: GNU Zip compressed data
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