Don't filter time stamps through the resolution supported

[chaz/tar] / ChangeLog

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+2005-09-16  Paul Eggert  <eggert@cs.ucla.edu>
+
+       Don't filter time stamps through the resolution supported
+       by struct stat; keep them to full nanosecond resolution.
+       This affects behavior only on older hosts or file systems
+       that have lower-resolution time stamps.
+       * src/common.h (OLDER_STAT_TIME): Parenthesize arg.
+       (OLDER_TAR_STAT_TIME): New macro.
+       (code_timespec): New function.
+       (BILLION, LOG10_BILLION, TIMESPEC_STRSIZE_BOUND): New constants.
+       * src/compare.c (diff_file): Use full time stamp resolution.
+       * src/create.c (start_header, dump_file0): Likewise.
+       (start_header, dump_file0): Adjust to new structure layout.
+       (dump_regular_finish): Simplify by using timespec_cmp.
+       * src/extract.c (struct delayed_set_stat): Don't store stat info
+       that we don't need, to save space.  All uses changed.
+       (struct delayed_set_stat, struct delayed_link, file_newer_p):
+       (create_placeholder_file, extract_link, apply_delayed_links):
+       Use full time stamp resolution.
+       (check_time): Use code_timespec rather than rolling our own code.
+       (set_stat, delay_set_stat): Arg now points to tar_stat_info to
+       avoid losing time information.  All callers changed.
+       * src/list.c (read_and, decode_header, print_heaeder):
+       Use full time stamp resolution.
+       * src/misc.c (code_timespec): New function.
+       * src/tar.h (struct tar_stat_info): Record atime, mtime, ctime
+       separately, for benefit of hosts with lower resolution.
+       * src/update.c (update_archive): Use full time stamp resolution.
+       * src/xheader.c (code_time): Use new code_timespec function
+       to simplify code.
+       (atime_coder, atime_decoder, ctime_coder, ctime_decoder):
+       (mtime_coder, mtime_decoder): Use full time stamp resolution.
+
+       Report time stamps to full resolution in environment.
+       Report memory allocation failures rather than ignoring them.
+       * src/system.c (time_to_env): New function.
+       (oct_to_env, str_to_env, chr_to_env): Report memory allocation failures.
+       (stat_to_env): Report full resolution in time stamps.
+
 2005-09-16  Paul Eggert  <eggert@cs.ucla.edu>
 
        Merge changes from gnulib for file system sub-second time stamps.