system_islnk(3f) - [M_system:QUERY_FILE] checks if argument is a link
(LICENSE:PD)
elemental impure logical function system_islnk(pathname)
character(len=*),intent(in) :: pathname
logical :: system_islnk
The islnk(3f) function checks if path is a path to a link.
path a character string representing a link
pathname. Trailing spaces are ignored.
system_islnk The system_islnk() function should always be
successful and no return value is reserved to
indicate an error.
No errors are defined.
system_isreg(3f), system_stat(3f), system_isdir(3f), system_perm(3f)
Sample program:
program demo_system_islnk
use M_system, only : system_islnk
implicit none
integer :: i
character(len=80),parameter :: names(*)=[ &
'/tmp ', &
'/tmp/NOTTHERE ', &
'/usr/local ', &
'. ', &
'link.test ', &
'PROBABLY_NOT ']
do i=1,size(names)
write(*,*)' is ',trim(names(i)),' a link? ', system_islnk(names(i))
enddo
end program demo_system_islnk
Results:
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| character(len=*), | intent(in) | :: | pathname |
elemental impure function system_islnk(pathname)
implicit none
! ident_8="@(#) M_system system_islnk(3f) determine if pathname is a link"
character(len=*),intent(in) :: pathname
logical :: system_islnk
character(kind=c_char,len=1),allocatable :: temp(:)
interface
function c_islnk(pathname) bind (C,name="my_islnk") result (c_ierr)
import c_char,c_int
character(kind=c_char,len=1),intent(in) :: pathname(*)
integer(kind=c_int) :: c_ierr
end function c_islnk
end interface
! kludge for bug in ifort (IFORT) 2021.3.0 20210609
temp = str2_carr(trim(pathname))
if(c_islnk(temp).eq.1)then
system_islnk=.true.
else
system_islnk=.false.
endif
end function system_islnk