How do I get a file s last modified time in Perl

Question

Suppose I have a filehandle  fh   I can check its existence with -e  fh or its file size with -s  fh or a slew of additional information about the file   How can I get its last modified time stamp

User · Answer

Use the builtin stat function  Or more specifically   my  modtime    stat  fh   9

User · Answer

Calling the built-in function stat  fh  returns an array with the following information about the file handle passed in  from the perlfunc man page for stat      0 dev      device number of filesystem   1 ino      inode number   2 mode     file mode   type and permissions    3 nlink    number of  hard  links to the file   4 uid      numeric user ID of file s owner   5 gid      numeric group ID of file s owner   6 rdev     the device identifier  special files only    7 size     total size of file  in bytes   8 atime    last access time since the epoch   9 mtime    last modify time since the epoch  10 ctime    inode change time  NOT creation time   since the epoch  11 blksize  preferred block size for file system I O  12 blocks   actual number of blocks allocated   Element number 9 in this array will give you the last modified time since the epoch  00 00 January 1  1970 GMT    From that you can determine the local time   my  epoch timestamp    stat  fh   9   my  timestamp         localtime  epoch timestamp     Alternatively  you can use the built-in module File  stat  included as of Perl 5 004  for a more object-oriented interface   And to avoid the magic number 9 needed in the previous example  additionally use Time  localtime  another built-in module  also included as of Perl 5 004    Together these lead to some  arguably  more legible code   use File  stat  use Time  localtime  my  timestamp   ctime stat  fh - gt mtime

User · Answer

You could use stat   or the File  Stat module   perldoc -f stat

User · Answer

my  array   stat  filehandle     The modification time is stored in Unix format in  array 9    Or explicitly   my   dev   ino   mode   nlink   uid   gid   rdev   size       atime   mtime   ctime   blksize   blocks    stat  filepath      0 dev      Device number of filesystem   1 ino      inode number   2 mode     File mode   type and permissions    3 nlink    Number of  hard  links to the file   4 uid      Numeric user ID of file s owner   5 gid      Numeric group ID of file s owner   6 rdev     The device identifier  special files only    7 size     Total size of file  in bytes   8 atime    Last access time in seconds since the epoch   9 mtime    Last modify time in seconds since the epoch  10 ctime    inode change time in seconds since the epoch  11 blksize  Preferred block size for file system I O  12 blocks   Actual number of blocks allocated   The epoch was at 00 00 January 1  1970 GMT   More information is in stat

User · Answer

my  array   stat  filehandle     The modification time is stored in Unix format in  array 9    Or explicitly   my   dev   ino   mode   nlink   uid   gid   rdev   size       atime   mtime   ctime   blksize   blocks    stat  filepath      0 dev      Device number of filesystem   1 ino      inode number   2 mode     File mode   type and permissions    3 nlink    Number of  hard  links to the file   4 uid      Numeric user ID of file s owner   5 gid      Numeric group ID of file s owner   6 rdev     The device identifier  special files only    7 size     Total size of file  in bytes   8 atime    Last access time in seconds since the epoch   9 mtime    Last modify time in seconds since the epoch  10 ctime    inode change time in seconds since the epoch  11 blksize  Preferred block size for file system I O  12 blocks   Actual number of blocks allocated   The epoch was at 00 00 January 1  1970 GMT   More information is in stat

User · Answer

You need the stat call  and the file name   my  last mod time    stat   file   9     Perl also has a different version   my  last mod time   -M  file    but that value is relative to when the program started   This is useful for things like sorting  but you probably want the first version

User · Answer

You need the stat call  and the file name   my  last mod time    stat   file   9     Perl also has a different version   my  last mod time   -M  file    but that value is relative to when the program started   This is useful for things like sorting  but you probably want the first version

User · Answer

I think you re looking for the stat function  perldoc -f stat   In particular  the 9th field  10th  index  9  of the returned list is the last modify time of the file in seconds since the epoch   So   my  last modified    stat  fh   9

User · Answer

I think you re looking for the stat function  perldoc -f stat   In particular  the 9th field  10th  index  9  of the returned list is the last modify time of the file in seconds since the epoch   So   my  last modified    stat  fh   9

User · Answer

I think you re looking for the stat function  perldoc -f stat   In particular  the 9th field  10th  index  9  of the returned list is the last modify time of the file in seconds since the epoch   So   my  last modified    stat  fh   9

User · Answer

Calling the built-in function stat  fh  returns an array with the following information about the file handle passed in  from the perlfunc man page for stat      0 dev      device number of filesystem   1 ino      inode number   2 mode     file mode   type and permissions    3 nlink    number of  hard  links to the file   4 uid      numeric user ID of file s owner   5 gid      numeric group ID of file s owner   6 rdev     the device identifier  special files only    7 size     total size of file  in bytes   8 atime    last access time since the epoch   9 mtime    last modify time since the epoch  10 ctime    inode change time  NOT creation time   since the epoch  11 blksize  preferred block size for file system I O  12 blocks   actual number of blocks allocated   Element number 9 in this array will give you the last modified time since the epoch  00 00 January 1  1970 GMT    From that you can determine the local time   my  epoch timestamp    stat  fh   9   my  timestamp         localtime  epoch timestamp     Alternatively  you can use the built-in module File  stat  included as of Perl 5 004  for a more object-oriented interface   And to avoid the magic number 9 needed in the previous example  additionally use Time  localtime  another built-in module  also included as of Perl 5 004    Together these lead to some  arguably  more legible code   use File  stat  use Time  localtime  my  timestamp   ctime stat  fh - gt mtime

User · Answer

This is very old thread  but I tried using the solution and could not get the information out of File  stat   Perl 5 10 1   I had to do the following   my  f stats   stat  fh   my  timestamp mod   localtime  f stats- gt mtime   print  MOD TIME    timestamp mod  n     Just thought I share in case anyone else had the same trouble

User · Answer

You could use stat   or the File  Stat module   perldoc -f stat

User · Answer

You could use stat   or the File  Stat module   perldoc -f stat

User · Answer

my  array   stat  filehandle     The modification time is stored in Unix format in  array 9    Or explicitly   my   dev   ino   mode   nlink   uid   gid   rdev   size       atime   mtime   ctime   blksize   blocks    stat  filepath      0 dev      Device number of filesystem   1 ino      inode number   2 mode     File mode   type and permissions    3 nlink    Number of  hard  links to the file   4 uid      Numeric user ID of file s owner   5 gid      Numeric group ID of file s owner   6 rdev     The device identifier  special files only    7 size     Total size of file  in bytes   8 atime    Last access time in seconds since the epoch   9 mtime    Last modify time in seconds since the epoch  10 ctime    inode change time in seconds since the epoch  11 blksize  Preferred block size for file system I O  12 blocks   Actual number of blocks allocated   The epoch was at 00 00 January 1  1970 GMT   More information is in stat

User · Answer

If you re just comparing two files to see which is newer then -C should work   if  -C  file1 txt   gt  -C  file2 txt              Update        There s also -M  but I don t think it s what you want  Luckily  it s almost impossible to search for documentation on these file operators via Google

User · Answer

This is very old thread  but I tried using the solution and could not get the information out of File  stat   Perl 5 10 1   I had to do the following   my  f stats   stat  fh   my  timestamp mod   localtime  f stats- gt mtime   print  MOD TIME    timestamp mod  n     Just thought I share in case anyone else had the same trouble

User · Answer

You need the stat call  and the file name   my  last mod time    stat   file   9     Perl also has a different version   my  last mod time   -M  file    but that value is relative to when the program started   This is useful for things like sorting  but you probably want the first version

User · Answer

On my FreeBSD system  stat just returns a bless    VAR1   bless                     102                   8                   33188                   1                   0                   0                   661                   276                   1372816636                   1372755222                   1372755233                   32768                   8                    File  stat       You need to extract mtime like this   my  ABC    stat  my file     print  ----------- ABC  File  stat   9  ------------------------ n     or  print  ----------- ABC 0  9  ------------------------ n

User · Answer

Calling the built-in function stat  fh  returns an array with the following information about the file handle passed in  from the perlfunc man page for stat      0 dev      device number of filesystem   1 ino      inode number   2 mode     file mode   type and permissions    3 nlink    number of  hard  links to the file   4 uid      numeric user ID of file s owner   5 gid      numeric group ID of file s owner   6 rdev     the device identifier  special files only    7 size     total size of file  in bytes   8 atime    last access time since the epoch   9 mtime    last modify time since the epoch  10 ctime    inode change time  NOT creation time   since the epoch  11 blksize  preferred block size for file system I O  12 blocks   actual number of blocks allocated   Element number 9 in this array will give you the last modified time since the epoch  00 00 January 1  1970 GMT    From that you can determine the local time   my  epoch timestamp    stat  fh   9   my  timestamp         localtime  epoch timestamp     Alternatively  you can use the built-in module File  stat  included as of Perl 5 004  for a more object-oriented interface   And to avoid the magic number 9 needed in the previous example  additionally use Time  localtime  another built-in module  also included as of Perl 5 004    Together these lead to some  arguably  more legible code   use File  stat  use Time  localtime  my  timestamp   ctime stat  fh - gt mtime

User · Answer

Use the builtin stat function  Or more specifically   my  modtime    stat  fh   9

User · Answer

Calling the built-in function stat  fh  returns an array with the following information about the file handle passed in  from the perlfunc man page for stat      0 dev      device number of filesystem   1 ino      inode number   2 mode     file mode   type and permissions    3 nlink    number of  hard  links to the file   4 uid      numeric user ID of file s owner   5 gid      numeric group ID of file s owner   6 rdev     the device identifier  special files only    7 size     total size of file  in bytes   8 atime    last access time since the epoch   9 mtime    last modify time since the epoch  10 ctime    inode change time  NOT creation time   since the epoch  11 blksize  preferred block size for file system I O  12 blocks   actual number of blocks allocated   Element number 9 in this array will give you the last modified time since the epoch  00 00 January 1  1970 GMT    From that you can determine the local time   my  epoch timestamp    stat  fh   9   my  timestamp         localtime  epoch timestamp     Alternatively  you can use the built-in module File  stat  included as of Perl 5 004  for a more object-oriented interface   And to avoid the magic number 9 needed in the previous example  additionally use Time  localtime  another built-in module  also included as of Perl 5 004    Together these lead to some  arguably  more legible code   use File  stat  use Time  localtime  my  timestamp   ctime stat  fh - gt mtime

User · Answer

You need the stat call  and the file name   my  last mod time    stat   file   9     Perl also has a different version   my  last mod time   -M  file    but that value is relative to when the program started   This is useful for things like sorting  but you probably want the first version

User · Answer

On my FreeBSD system  stat just returns a bless    VAR1   bless                     102                   8                   33188                   1                   0                   0                   661                   276                   1372816636                   1372755222                   1372755233                   32768                   8                    File  stat       You need to extract mtime like this   my  ABC    stat  my file     print  ----------- ABC  File  stat   9  ------------------------ n     or  print  ----------- ABC 0  9  ------------------------ n

User · Answer

Use the builtin stat function  Or more specifically   my  modtime    stat  fh   9

User · Answer

my  array   stat  filehandle     The modification time is stored in Unix format in  array 9    Or explicitly   my   dev   ino   mode   nlink   uid   gid   rdev   size       atime   mtime   ctime   blksize   blocks    stat  filepath      0 dev      Device number of filesystem   1 ino      inode number   2 mode     File mode   type and permissions    3 nlink    Number of  hard  links to the file   4 uid      Numeric user ID of file s owner   5 gid      Numeric group ID of file s owner   6 rdev     The device identifier  special files only    7 size     Total size of file  in bytes   8 atime    Last access time in seconds since the epoch   9 mtime    Last modify time in seconds since the epoch  10 ctime    inode change time in seconds since the epoch  11 blksize  Preferred block size for file system I O  12 blocks   Actual number of blocks allocated   The epoch was at 00 00 January 1  1970 GMT   More information is in stat

User · Answer

I think you re looking for the stat function  perldoc -f stat   In particular  the 9th field  10th  index  9  of the returned list is the last modify time of the file in seconds since the epoch   So   my  last modified    stat  fh   9

User · Answer

You could use stat   or the File  Stat module   perldoc -f stat

User · Answer

If you re just comparing two files to see which is newer then -C should work   if  -C  file1 txt   gt  -C  file2 txt              Update        There s also -M  but I don t think it s what you want  Luckily  it s almost impossible to search for documentation on these file operators via Google

User · Answer

Use the builtin stat function  Or more specifically   my  modtime    stat  fh   9

[perl] How do I get a file's last modified time in Perl?

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