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Manual Reference Pages  - system_utime (3m_system)

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NAME

system_utime(3f) - [M_system:FILE_SYSTEM] set file access and modification times (LICENSE:PD)

CONTENTS

Synopsis
Description
Options
Return Value
Errors
Examples

SYNOPSIS

function utime(pathname,times)

     character(len=*),intent(in) :: pathname
     integer,intent(in),optional :: times(2)
     logical                     :: utime

DESCRIPTION

The system_utime(3f) function sets the access and modification times of the file named by the path argument by calling utime(3c).

If times() is not present the access and modification times of the file shall be set to the current time.

To use system_utime(3f) the effective user ID of the process must match the owner of the file, or the process has to have write permission to the file or have appropriate privileges,

OPTIONS

times	If present, the values will be interpreted as the access and modification times as Unix Epoch values. That is, they are times measured in seconds since the Unix Epoch.
pathname
	name of the file whose access and modification times are to be updated.

RETURN VALUE

Upon successful completion .TRUE. is returned. Otherwise, [char46]FALSE. is returned and errno shall be set to indicate the error, and the file times remain unaffected.

ERRORS

The underlying utime(3c) function fails if:

EACCES	Search permission is denied by a component of the path prefix; or the times argument is a null pointer and the effective user ID of the process does not match the owner of the file, the process does not have write permission for the file, and the process does not have appropriate privileges.
ELOOP	A loop exists in symbolic links encountered during resolution of the path argument.
ENAMETOOLONG
	The length of a component of a pathname is longer than {NAME_MAX}.
ENOENT	A component of path does not name an existing file or path is an empty string.
ENOTDIR
	A component of the path prefix names an existing file that is neither a directory nor a symbolic link to a directory, or the path argument contains at least one non-<slash> character and ends with one or more trailing <slash> characters and the last pathname component names an existing file that is neither a directory nor a symbolic link to a directory.
EPERM	The times argument is not a null pointer and the effective user ID of the calling process does not match the owner of the file and the calling process does not have appropriate privileges.
EROFS	The file system containing the file is read-only.

The utime() function may fail if:

   ELOOP  More than {SYMLOOP_MAX} symbolic links were encountered
          during resolution of the path argument.

   ENAMETOOLONG  The length of a pathname exceeds {PATH_MAX}, or
                 pathname resolution of a symbolic link produced
                 an intermediate result with a length that exceeds
                 {PATH_MAX}.

EXAMPLES

Sample program

      program demo_system_utime
      use M_system, only : system_utime, system_perror
      implicit none
      character(len=4096) :: pathname
      integer             :: times(2)
      integer             :: i
         do i=1,command_argument_count()
            call get_command_argument(i, pathname)
            if(.not.system_utime(pathname,times))then
               call system_perror(’*demo_system_utime*’)
            endif
         enddo
      end program demo_system_utime

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Nemo Release 3.1

system_utime (3m_system)

March 07, 2025

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