pm_sysPath::isFailedMove Interface Reference

Generate and return .true. if the requested move action failed, otherwise return .false. indicating success.
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Detailed Description

Generate and return .true. if the requested move action failed, otherwise return .false. indicating success.

The procedures of this generic interface perform the move action depending on the type of the two input paths:

1. If from is an existing file, then,
   1. If to is an existing directory, the source file from will be moved (with the same old file base name) into the existing destination folder.
      
   2. If to is an existing file, then the source file will overwrite the existing destination file if and only if the optional argument forced = .true. is specified.
      
   3. If to is a non-existing path, then to is interpreted as a non-existing destination file. If so,
      1. The (potentially nested non-existing) dirname of the destination file will be created.
         
      2. The source file from will be moved to the destination folder with a new name that is the base name of to.
         
2. If from is an existing directory, then,
   1. If to is an existing directory, the contents of the source directory from will be moved into the existing destination folder.
      
      1. Existing files with the same name as in the source folder from will be overwritten only if the optional argument forced = .true. is specified.
         
   2. If to is an existing file, the program will not perform the requested move action and will return failed = .true..
      
   3. If to is a non-existing path, then to is interpreted as a non-existing destination directory.
      
      1. Firstly, the (potentially nested) non-existing directory will be generated.
         
      2. Secondly, the contents of the source directory from will be moved into the newly-created destination directory to.
         
3. If from is neither an existing file nor an existing folder, the program will not perform the requested move action and will return failed = .true..
   

This procedure is capable of moving a file or a directory to nonexistent (potentially nested) directories.

The move request is done by first identifying the processor shell type (CMD, PowerShell, Bash, csh, zsh, ...) and then calling the runtime system shell via the Fortran intrinsic subroutine execute_command_line() to invoke mkdir shell command with appropriate flags.
Consequently, this procedure should function as expected in Windows CMD, PowerShell, and POSIX-compatible (Unix-like) shells.

1. On POSIX-compliant shells, the commands mv -arn and mv -arf are used to perform the move regularly or forcefully (with overwriting), respectively.
   
2. On Windows-based terminals, the commands xmove /e /q /s and xmove /e /q /s /Y are used to perform the move regularly or forcefully (with overwriting), respectively.
   

Parameters

[in]	from	: The input scalar character of default kind SK containing a POSIX-style or Windows-style path to a file or directory.
[in]	to	: The input scalar character of default kind SK containing a POSIX-style or Windows-style path to which the path from should be moved. When the input argument from points to a single file, there is ambiguity about how the destination path should be interpreted. As such, if to points to a (potentially non-existing) folder, make sure to end it with a suitable directory separator getDirSep before passing it to the procedures under this generic integer. Otherwise, to is assumed to point to a file name.
[in]	forced	: The input scalar logical of default kind LK. If .true. the move action will overwrite the destination to if it already exists. This input argument is relevant only if the input destination path partially or entirely contains the same files in from. (optional, default = .false.)
[in]	wait	: The input scalar logical of default kind LK with the same functionality as the wait argument of the Fortran intrinsic execute_command_line(). If .true., the procedure will wait for the shell action to terminate before returning the control to the Fortran program. Otherwise, the system call will be done asynchronously and the success of the action will not be verified. (optional, default = .true.)
[in]	ntry	: The input scalar positive integer of default kind IK representing the number of times the requested action should be attempted. Multiple tries are particularly useful on Windows platforms where applications take the ownership of a particular resource on the system and may not allow other applications to utilize the resource. For example, Dropbox is a well-known example of an application that blocks any other applications from making any changes to a specific path with which it is working, preventing any manipulation of the path by other applications. (optional, default = 1)
[in,out]	errmsg	: The input/output scalar character of default kind SK of arbitrary length type parameter. If present and an error occurs, it is assigned an explanatory message describing the nature of the error that has occurred. If the length of errmsg is too short for the output error message, the message tail will be clipped as needed. A length of 2047 characters for errmsg is likely enough to capture most error messages in full. (optional. If missing, no error message will be output.)

Returns

failed : The output scalar logical of default kind LK. It is .true. if and only if an error occurs while performing the requested task.
This includes the possibility of the input path from not existing before the move action or the destination path to not existing after the move action.

Possible calling interfaces ⛓

use pm_kind, only: LK, IK, SK
use pm_sysPath, only: isFailedMove
character(2047, SK) :: errmsg
logical(LK) :: failed, forced
logical(LK) :: wait
integer(IK) :: ntry
 
failed = isFailedMove(from, to, forced = forced, wait = wait, ntry = ntry, errmsg = errmsg)

Warning

Note that this procedure does not verify the conformance of the input paths to the naming conventions of the current processor shell. For example,

1. if the shell is POSIX-conforming, then the path is expected to conform to the POSIX conventions.
   
2. if the shell is Windows CMD or PowerShell, the path is expected to conform to the Windows conventions.
   

This procedure interprets the input paths verbatim.
This procedure potentially calls the operating system to create the input destination path directories.
To minimize security vulnerabilities and to properly handle the presence of whitespace or other potentially problematic characters, the input path will be interpreted verbatim by calling getPathVerbatim.

Asynchronous move action.
Note that even if the processor supports asynchronous command execution (wait = .false.), there is no mechanism provided for finding out later whether the command being executed asynchronously has terminated or what its exit status exitstat was.

The input ntry must be a positive (non-zero) integer.
This condition is verified only if the library is built with the preprocessor macro CHECK_ENABLED=1.

Remarks

The procedures under discussion are impure.

See also

isFailedCopy
isFailedMove
isFailedRemove
isFailedMakeDir

Example usage ⛓

program example
 
    use pm_kind, only: LK, IK, SK
    use pm_io, only: display_type
    use pm_sysPath, only: isFailedMove, isFile, isDir, getPathNew, getDirSep
 
    implicit none
 
    character(:, SK), allocatable :: from, to
 
    type(display_type) :: disp
    disp = display_type(file = "main.out.F90")
 
    call disp%skip()
    call disp%show("!%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
    call disp%show("! Move file to a new non-existing destination file.")
    call disp%show("!%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
    call disp%skip()
 
    call disp%skip()
    call disp%show("from = SK_'main.F90' ! define the source path name.")
                    from = SK_'main.F90'
    call disp%show("to = getPathNew(ext = SK_'.main.F90') ! define a random unique path name.")
                    to = getPathNew(ext = SK_'.main.F90')
    call disp%show("to")
    call disp%show( to , deliml = SK_"""" )
    call disp%show("[isFile(from), isFile(to)]")
    call disp%show( [isFile(from), isFile(to)] )
    call disp%show("if (isFailedMove(from, to)) error stop 'movement failed.'")
                    if (isFailedMove(from, to)) error stop 'movement failed.'
    call disp%show("[isFile(from), isFile(to)]")
    call disp%show( [isFile(from), isFile(to)] )
    call disp%show("if (isFailedMove(to, from)) error stop 'movement failed.'")
                    if (isFailedMove(to, from)) error stop 'movement failed.'
    call disp%show("[isFile(from), isFile(to)]")
    call disp%show( [isFile(from), isFile(to)] )
    call disp%skip()
 
    call disp%skip()
    call disp%show("!%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
    call disp%show("! Move file to a new non-existing doubly-nested destination folder.")
    call disp%show("!%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%")
    call disp%skip()
 
    call disp%skip()
    call disp%show("from = SK_'main.F90' ! define the source path name.")
                    from = SK_'main.F90'
    call disp%show("to = getPathNew(dir = getPathNew(), prefix = SK_'sub')//getDirSep() ! Ending the directory name with directory separator is crucial if it does not exit already, otherwise it is interpreted as file name.")
                    to = getPathNew(dir = getPathNew(), prefix = SK_'sub')//getDirSep()
    call disp%show("to")
    call disp%show( to , deliml = SK_"""" )
    call disp%show("[isDir(from), isFile(from), isDir(to), isFile(to)]")
    call disp%show( [isDir(from), isFile(from), isDir(to), isFile(to)] )
    call disp%show("if (isFailedMove(from, to)) error stop 'movement failed.'")
                    if (isFailedMove(from, to)) error stop 'movement failed.'
    call disp%show("[isFile(from), isFile(to//getDirSep()//from)]")
    call disp%show( [isFile(from), isFile(to//getDirSep()//from)] )
    call disp%show("if (isFailedMove(to//from, from)) error stop 'movement failed.'")
                    if (isFailedMove(to//from, from)) error stop 'movement failed.'
    call disp%show("[isFile(from), isFile(to)]")
    call disp%show( [isFile(from), isFile(to)] )
    call disp%skip()
 
end program example

Example Unix compile command via Intel ifort compiler ⛓

#!/usr/bin/env sh
rm main.exe
ifort -fpp -standard-semantics -O3 -Wl,-rpath,../../../lib -I../../../inc main.F90 ../../../lib/libparamonte* -o main.exe
./main.exe

Example Windows Batch compile command via Intel ifort compiler ⛓

del main.exe
set PATH=..\..\..\lib;%PATH%
ifort /fpp /standard-semantics /O3 /I:..\..\..\include main.F90 ..\..\..\lib\libparamonte*.lib /exe:main.exe
main.exe

Example Unix / MinGW compile command via GNU gfortran compiler ⛓

#!/usr/bin/env sh
rm main.exe
gfortran -cpp -ffree-line-length-none -O3 -Wl,-rpath,../../../lib -I../../../inc main.F90 ../../../lib/libparamonte* -o main.exe
./main.exe

Example output ⛓

 
!%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
! Move file to a new non-existing destination file.
!%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 
from = SK_'main.F90' ! define the source path name.
to = getPathNew(ext = SK_'.main.F90') ! define a random unique path name.
to
"new_20241027_224347_969_pid_1.main.F90"
[isFile(from), isFile(to)]
T, F
if (isFailedMove(from, to)) error stop 'movement failed.'
[isFile(from), isFile(to)]
F, T
if (isFailedMove(to, from)) error stop 'movement failed.'
[isFile(from), isFile(to)]
T, F
 
 
!%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
! Move file to a new non-existing doubly-nested destination folder.
!%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 
from = SK_'main.F90' ! define the source path name.
to = getPathNew(dir = getPathNew(), prefix = SK_'sub')//getDirSep() ! Ending the directory name with directory separator is crucial if it does not exit already, otherwise it is interpreted as file name.
to
"new_20241027_224347_976_pid_1/sub20241027_224347_978_pid_1/"
[isDir(from), isFile(from), isDir(to), isFile(to)]
F, T, F, F
if (isFailedMove(from, to)) error stop 'movement failed.'
[isFile(from), isFile(to//getDirSep()//from)]
F, T
if (isFailedMove(to//from, from)) error stop 'movement failed.'
[isFile(from), isFile(to)]
T, F
 
 

Test:

test_pm_sysPath

Todo:

High Priority: The current Fortran standard 202x does not allow passing characters of non-default kind to the intrinsic Fortran statements and procedures.
As such, the implementation of this procedure for non-default character kinds leads to compile-time kind mismatch errors.
This procedure should be converted back to a generic interface in the future when non-default character kinds are also fully supported by the intrinsic functions.

Final Remarks ⛓

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For details on the naming abbreviations, see this page.
For details on the naming conventions, see this page.
This software is distributed under the MIT license with additional terms outlined below.

1. If you use any parts or concepts from this library to any extent, please acknowledge the usage by citing the relevant publications of the ParaMonte library.
   
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This software is available to the public under a highly permissive license.
Help us justify its continued development and maintenance by acknowledging its benefit to society, distributing it, and contributing to it.

Copyright

Computational Data Science Lab

Author:

Amir Shahmoradi, Tuesday March 7, 2017, 3:09 AM, Institute for Computational Engineering and Sciences (ICES), The University of Texas Austin

Definition at line 3626 of file pm_sysPath.F90.

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The documentation for this interface was generated from the following file:

• src/fortran/main/pm_sysPath.F90