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File synchronization fixes.

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* admin/CPP-DEFINES (BSD_SYSTEM, HAVE_FSYNC): Remove.
* admin/merge-gnulib (GNULIB_MODULES): Add fsync, fdatasync.
* configure.ac (BSD_SYSTEM, BSD_SYSTEM_AHB): Remove; no longer needed.
(fsync): Remove check; now done by gnulib.
* lib/fdatasync.c, lib/fsync.c, m4/fdatasync.m4, m4/fsync.m4:
New files, from gnulib.
* lib/gnulib.mk, m4/gnulib-comp.m4: Regenerate.
* lib-src/Makefile.in (LIB_FDATASYNC): New macro.
(emacsclient${EXEEXT}): Use it.
* lib-src/emacsclient.c (main): Use fdatasync, not fsync, since we don't
care about metadata.  Keep trying if interrupted.
* lib-src/movemail.c (main, popmail): Don't worry about BSD_SYSTEM, since
fsync is available everywhere (or there is a substitute).  Don't
report an error if fsync returns EINVAL.
* nt/inc/ms-w32.h (fdatasync): New macro, suggested by Eli Zaretskii.
* src/Makefile.in (LIB_FDATASYNC): New macro.
(LIBES): Use it.
* src/conf_post.h (BSD_SYSTEM, BSD_SYSTEM_AHB): Remove; no longer needed.
* src/fileio.c (Fwrite_region, write_region_inhibit_fsync):
Don't worry about HAVE_FSYNC, since a substitute fsync is
available if the system lacks one.
(Fwrite_regin): Retry fsync if interrupted.

Fixes: debbugs:13944
This commit is contained in:
Paul Eggert 2013-03-13 11:42:22 -07:00
parent c7ffccaf17
commit 47d7532e09
23 changed files with 273 additions and 76 deletions
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6
lib-src/emacsclient.c
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@ -1724,7 +1724,8 @@ main (int argc, char **argv)
needlf = 2;
}
fflush (stdout);
fsync (1);
while (fdatasync (1) != 0 && errno == EINTR)
continue;
/* Now, wait for an answer and print any messages. */
while (exit_status == EXIT_SUCCESS)
@ -1825,7 +1826,8 @@ main (int argc, char **argv)
if (needlf)
printf ("\n");
fflush (stdout);
fsync (1);
while (fdatasync (1) != 0 && errno == EINTR)
continue;
if (rl < 0)
exit_status = EXIT_FAILURE;