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C Library Functions  - system_isblk (3)

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NAME

system_isblk(3f) - [M_system:QUERY_FILE] checks if argument is a block device (LICENSE:PD)

CONTENTS

Synopsis
Description
Options
Return Value
Errors
See Also
Examples

SYNOPSIS

elemental impure logical function system_isblk(pathname)

     character(len=*),intent(in) :: pathname
     logical                     :: system_isblk

DESCRIPTION

The isblk(3f) function checks if path is a path to a block device.

OPTIONS

path	a character string representing a block device pathname. Trailing spaces are ignored.

RETURN VALUE

The system_isblk() function should always be successful and no return value is reserved to indicate an error.

ERRORS

No errors are defined.

SEE ALSO

system_isreg(3f), system_stat(3f), system_isdir(3f), system_perm(3f)

EXAMPLES

check if filename is a block device

   program demo_system_isblk
   use M_system, only : system_isblk
   implicit none
   integer                     :: i
   character(len=80),parameter :: names(*)=[ &
   ’/tmp            ’, &
   ’/tmp/NOTTHERE   ’, &
   ’/usr/local      ’, &
   ’.               ’, &
   ’block_device.tst’, &
   ’PROBABLY_NOT    ’]
   do i=1,size(names)
       write(*,*)’ is ’,trim(names(i)),’ a block device? ’, &
               & system_isblk(names(i))
   enddo
   end program demo_system_isblk

Results:

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Nemo Release 3.1

system_isblk (3)

June 29, 2025

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