Man Page system.3f

NAME

     system - execute operating system command

SYNOPSIS

     integer function system (string)
     character*(*) string

DESCRIPTION

     The function system gives string to your shell as input,  as
     if  the string had been typed as a command.  If the environ-
     ment variable SHELL is found, its value is used as the  com-
     mand interpreter (shell); otherwise, sh(1) is used.

     The current process waits until the command terminates.  The
     returned value is the exit status of the shell.  See wait(2)
     for an explanation of this value.

     The functions sh(3f) and system(3f) pass the argument string
     to  a shell for execution.  They convert the argument string
     from a Fortran character value to a C string value and  pass
     it to the C routine system(3c).

     The routines sh(3f) and system(3f)  differ  in  that  system
     flushes the Fortran I/O buffers before calling the C routine
     system, while sh does not.  Flushing the  buffers  can  take
     significant   time,   and  so,  if  any  Fortran  output  is
     irrelevant to the result of the call, the routine sh is pre-
     ferred over the routine system.

     Note that both sh(3f) and system(3f) return integer results.

FILES

     libfui.a

SEE ALSO

     execve(2), wait(2), system(3c)

BUGS

     string cannot be longer than 1023 characters.

SEE ALSO

     sh(3F)