PGI Fortran Reference manual - The Portland Group

3F Functions and VAX SubroutinesDescriptionftell returns the current position of the file connected to the logical unit lu. The value returned isan offset, in units of bytes, from the beginning of the file. If the value returned is negative, it isthe negation of the system error code.9.1.20. gerrorReturn system error message.Synopsischaracter*(*) function gerror()DescriptionReturn the system error message of the last detected system error.9.1.21. getargGet the nth command line argument.Synopsissubroutine getarg(n, arg)integer ncharacter*(*) argDescriptionReturn the nth command line argument in arg, where the 0th argument is the command name.9.1.22. iargcThe iargc subroutine returns the number of command line arguments following the programname.integer function iargc()9.1.23. getcGet character from unit 5.Synopsisinteger function getc(ch)character*(*) chPGI Fortran Reference Guide 196