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Full Discussion: Show date/time with tail|grep command
Top Forums Shell Programming and Scripting Show date/time with tail|grep command Post 302296020 by jim mcnamara on Tuesday 10th of March 2009 07:16:34 AM
Old 03-10-2009
Ok- then you tell us how to know when the line in the logfile was written. If the file was written out over a period of time the file mtime is LAST time it was written to - the time for the last line in the file - not the time a given line was written.

Without timestamps or some other file with timestamps you cannot get anything but a file mtime - or a ctime which in this case is pretty much useless.
 

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LEARN ABOUT CENTOS

archive_entry_time

ARCHIVE_ENTRY_TIME(3)					   BSD Library Functions Manual 				     ARCHIVE_ENTRY_TIME(3)

NAME

     archive_entry_atime, archive_entry_atime_nsec, archive_entry_atime_is_set, archive_entry_set_atime, archive_entry_unset_atime,
     archive_entry_birthtime, archive_entry_birthtime_nsec, archive_entry_birthtime_is_set, archive_entry_set_birthtime,
     archive_entry_unset_birthtime, archive_entry_ctime, archive_entry_ctime_nsec, archive_entry_ctime_is_set, archive_entry_set_ctime,
     archive_entry_unset_ctime, archive_entry_mtime, archive_entry_mtime_nsec, archive_entry_mtime_is_set, archive_entry_set_mtime,
     archive_entry_unset_mtime, -- functions for manipulating times in archive entry descriptions

LIBRARY

     Streaming Archive Library (libarchive, -larchive)

SYNOPSIS

     #include <archive_entry.h>

     time_t
     archive_entry_atime(struct archive_entry *a);

     long
     archive_entry_atime_nsec(struct archive_entry *a);

     int
     archive_entry_atime_is_set(struct archive_entry *a);

     void
     archive_entry_set_atime(struct archive_entry *a, time_t sec, long nanosec);

     void
     archive_entry_unset_atime(struct archive_entry *a);

     time_t
     archive_entry_birthtime(struct archive_entry *a);

     long
     archive_entry_birthtime_nsec(struct archive_entry *a);

     int
     archive_entry_birthtime_is_set(struct archive_entry *a);

     void
     archive_entry_set_birthtime(struct archive_entry *a, time_t sec, long nanosec);

     void
     archive_entry_unset_birthtime(struct archive_entry *a);

     time_t
     archive_entry_ctime(struct archive_entry *a);

     long
     archive_entry_ctime_nsec(struct archive_entry *a);

     int
     archive_entry_ctime_is_set(struct archive_entry *a);

     void
     archive_entry_set_ctime(struct archive_entry *a, time_t sec, long nanosec);

     void
     archive_entry_unset_ctime(struct archive_entry *a);

     time_t
     archive_entry_mtime(struct archive_entry *a);

     long
     archive_entry_mtime_nsec(struct archive_entry *a);

     int
     archive_entry_mtime_is_set(struct archive_entry *a);

     void
     archive_entry_set_mtime(struct archive_entry *a, time_t sec, long nanosec);

     void
     archive_entry_unset_mtime(struct archive_entry *a);

DESCRIPTION

     These functions create and manipulate the time fields in an archive_entry.  Supported time fields are atime (access time), birthtime (cre-
     ation time), ctime (last time an inode property was changed) and mtime (modification time).

     libarchive(3) provides a high-resolution interface.  The timestamps are truncated automatically depending on the archive format (for archiv-
     ing) or the filesystem capabilities (for restoring).

     All timestamp fields are optional.  The XXX_unset() functions can be used to mark the corresponding field as missing.  The current state can
     be queried using XXX_is_set().  Unset time fields have a second and nanosecond field of 0.

SEE ALSO

     archive(3), archive_entry(3)

HISTORY

     The libarchive library first appeared in FreeBSD 5.3.

AUTHORS

     The libarchive library was written by Tim Kientzle <kientzle@acm.org>.

BSD
								 February 2, 2012							       BSD
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