The NAG Fortran Compiler provides access to a large number of Posix system calls. For example, the SYSTEM routine, which passes a string to the command processor for execution, is in the F90_UNIX_PROC module.
Seven modules providing more than 60 Posix procedures covering directories, files, environment and processes are available. These are fully documented in the manual, on-line and at http://www.nag.co.uk/nagware/np/r53_doc/index.
For specific technical advice in using NAG's products, please contact our technical experts.
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