system - execute operating system command
integer function system (string) character*(*) string
The function system gives string to your shell as input, as if the string had been typed as a command. If the environment variable SHELL is found, its value is used as the command 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 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 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 preferred over the routine system.
Note that both sh(3F) and system(3F) return integer results.
libfsu.a
execve(2), wait(2), sh(3F), system(3C)
string cannot be longer than 1023 characters.