process_close(3fm) - [M_process] close a process being written to
or read from
(LICENSE:PD)
subroutine process_close(fp,ierr)
type(streampointer) :: fp
integer :: ierr
The M_process Fortran procedures use the ISO_C_BINDING interface to define Fortran-callable versions of the C procedures popen(3c)/pclose(3c) and fgets(3c)/fputs(3c). A set of record-oriented wrapper routines are then used to create a simple Fortran-callable interface.
A POSIX C interface is generally available but may require using a Linux subwindow or an application such as CygWin on MSWindows platforms.
See “M_process” for an extended description.
fp C file pointer returned by process_open_*()
ierr error flag returned.
This example shows a simple open and close of a process
program demo_process_close use M_process ,ONLY: process_open_read, process_open_write use M_process ,ONLY: streampointer, process_close implicit none type(streampointer) :: fp integer :: ierr ! open process to read from call process_open_read(‘ls -l’,fp,ierr) write(,)’CLOSE : process is opened with status ‘,ierr call process_close(fp,ierr) write(,)’CLOSE : process closed with status ‘,ierr end program demo_process_close
Sample output:
CLOSE : process is opened with status 0
CLOSE : process closed with status 13
o PIPES: pipe(3c), popen(3c), pclose(3c), fflush(3c)
o NAMED PIPES: mkfifo(3c), mknod(3c)
o SUBPROCESSES: fork(3c)
o OTHER: fflush(3c)
John S. Urban
Public Domain
Type | Intent | Optional | Attributes | Name | ||
---|---|---|---|---|---|---|
type(streampointer) | :: | fp | ||||
integer, | intent(out) | :: | ierr |
subroutine process_close(fp,ierr)
! ident_5="@(#)M_process::process_close(3f): close process"
! file pointer returned for process ! DO NOT MAKE fp INTENT(IN)
type(streampointer) :: fp
integer(c_int) :: ios
integer,intent(out) :: ierr
!-------------------------------------------------------------------------------
ios=0_c_int
if (.not.c_associated(fp%handle)) then
write(*,*)'*process_close* process not found'
else
ios=fflush(fp%handle)
if(ierr.ge.0)then
ios=system_pclose(fp%handle)
endif
endif
if(process_debug)then
write(*,*) '*process_close* Closed pipe with status ',ios
endif
ierr=ios
end subroutine process_close