octave-lojdl/gnulib-hg: lib/full-write.c annotate

annotate lib/full-write.c @ 7302:8a1a9361108c

* _fpending.c: Include <config.h> unconditionally, since we no longer worry about uses that don't define HAVE_CONFIG_H. * acl.c, alloca.c, argmatch.c, atexit.c, backupfile.c: * basename.c, c-stack.c, c-strtod.c, calloc.c, canon-host.c: * canonicalize.c, chdir-long.c, chdir-safer.c, chown.c: * cloexec.c, close-stream.c, closeout.c, creat-safer.c: * cycle-check.c, diacrit.c, dirchownmod.c, dirfd.c, dirname.c: * dup-safer.c, dup2.c, error.c, euidaccess.c, exclude.c: * exitfail.c, fchmodat.c, fchown-stub.c, fd-safer.c: * file-type.c, fileblocks.c, filemode.c, filenamecat.c: * fnmatch.c, fopen-safer.c, fprintftime.c, free.c, fsusage.c: * ftruncate.c, fts-cycle.c, fts.c, full-write.c, gai_strerror.c: * getcwd.c, getdate.y, getdomainname.c, getgroups.c: * gethostname.c, gethrxtime.c, getloadavg.c, getlogin_r.c: * getndelim2.c, getnline.c, getopt.c, getopt1.c, getpass.c: * gettime.c, gettimeofday.c, getugroups.c, getusershell.c: * glob.c, group-member.c, hard-locale.c, hash-pjw.c, hash.c: * human.c, idcache.c, inet_ntop.c, inet_pton.c, inttostr.c: * isdir.c, lchown.c, linebuffer.c, long-options.c, lstat.c: * malloc.c, md5.c, memcasecmp.c, memchr.c, memcmp.c, memcoll.c: * memcpy.c, memmove.c, memrchr.c, mkancesdirs.c, mkdir-p.c: * mkdir.c, mkdirat.c, mkstemp-safer.c, mkstemp.c, modechange.c: * mountlist.c, nanosleep.c, obstack.c, open-safer.c: * openat-die.c, openat.c, pagealign_alloc.c, physmem.c: * pipe-safer.c, posixtm.c, posixver.c, putenv.c, quote.c: * quotearg.c, raise.c, readtokens.c, readtokens0.c, readutmp.c: * realloc.c, regex.c, rename.c, rmdir.c, rpmatch.c, safe-read.c: * same.c, save-cwd.c, savedir.c, setenv.c, settime.c, sha1.c: * sig2str.c, snprintf.c, strdup.c, strerror.c, strftime.c: * stripslash.c, strndup.c, strnlen.c, strpbrk.c, strtod.c: * strtoimax.c, strtol.c, strverscmp.c, tempname.c, time_r.c: * timegm.c, tmpfile-safer.c, unlinkdir.c, userspec.c, utime.c: * utimecmp.c, utimens.c, version-etc-fsf.c, version-etc.c: * xalloc-die.c, xgetcwd.c, xgethostname.c, xmalloc.c: * xmemcoll.c, xnanosleep.c, xreadlink.c, xstrtod.c: * xstrtoimax.c, xstrtol.c, xstrtoumax.c, yesno.c: Likewise.

author	Paul Eggert <eggert@cs.ucla.edu>
date	Wed, 13 Sep 2006 22:38:14 +0000
parents	a84d5045e247
children	318625b71404

rev	line source
4140 40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	1 /* An interface to read and write that retries (if necessary) until complete.
3403 9ab12ba48e48 Correct credits, as cccp.c no longer Jim Meyering <jim@meyering.net> parents: 2460 diff changeset	2
5159 a535859efd14 Merge from coreutils. Paul Eggert <eggert@cs.ucla.edu> parents: 4144 diff changeset	3 Copyright (C) 1993, 1994, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
7302 8a1a9361108c * _fpending.c: Include <config.h> unconditionally, since we no Paul Eggert <eggert@cs.ucla.edu> parents: 7015 diff changeset	4 2004, 2005, 2006 Free Software Foundation, Inc.
179 c8185437a5d1 . Jim Meyering <jim@meyering.net> parents: diff changeset	5
c8185437a5d1 . Jim Meyering <jim@meyering.net> parents: diff changeset	6 This program is free software; you can redistribute it and/or modify
c8185437a5d1 . Jim Meyering <jim@meyering.net> parents: diff changeset	7 it under the terms of the GNU General Public License as published by
c8185437a5d1 . Jim Meyering <jim@meyering.net> parents: diff changeset	8 the Free Software Foundation; either version 2, or (at your option)
c8185437a5d1 . Jim Meyering <jim@meyering.net> parents: diff changeset	9 any later version.
c8185437a5d1 . Jim Meyering <jim@meyering.net> parents: diff changeset	10
c8185437a5d1 . Jim Meyering <jim@meyering.net> parents: diff changeset	11 This program is distributed in the hope that it will be useful,
c8185437a5d1 . Jim Meyering <jim@meyering.net> parents: diff changeset	12 but WITHOUT ANY WARRANTY; without even the implied warranty of
c8185437a5d1 . Jim Meyering <jim@meyering.net> parents: diff changeset	13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
c8185437a5d1 . Jim Meyering <jim@meyering.net> parents: diff changeset	14 GNU General Public License for more details.
c8185437a5d1 . Jim Meyering <jim@meyering.net> parents: diff changeset	15
c8185437a5d1 . Jim Meyering <jim@meyering.net> parents: diff changeset	16 You should have received a copy of the GNU General Public License
640 d60db0e1c0d9 Libit tweaks. Jim Meyering <jim@meyering.net> parents: 557 diff changeset	17 along with this program; if not, write to the Free Software Foundation,
5848 a48fb0e98c8c * empty log message * Paul Eggert <eggert@cs.ucla.edu> parents: 5159 diff changeset	18 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
179 c8185437a5d1 . Jim Meyering <jim@meyering.net> parents: diff changeset	19
7302 8a1a9361108c * _fpending.c: Include <config.h> unconditionally, since we no Paul Eggert <eggert@cs.ucla.edu> parents: 7015 diff changeset	20 #include <config.h>
179 c8185437a5d1 . Jim Meyering <jim@meyering.net> parents: diff changeset	21
4144 96e52fc820a5 Include specification first. Bruno Haible <bruno@clisp.org> parents: 4142 diff changeset	22 /* Specification. */
96e52fc820a5 Include specification first. Bruno Haible <bruno@clisp.org> parents: 4142 diff changeset	23 #ifdef FULL_READ
96e52fc820a5 Include specification first. Bruno Haible <bruno@clisp.org> parents: 4142 diff changeset	24 # include "full-read.h"
96e52fc820a5 Include specification first. Bruno Haible <bruno@clisp.org> parents: 4142 diff changeset	25 #else
96e52fc820a5 Include specification first. Bruno Haible <bruno@clisp.org> parents: 4142 diff changeset	26 # include "full-write.h"
96e52fc820a5 Include specification first. Bruno Haible <bruno@clisp.org> parents: 4142 diff changeset	27 #endif
96e52fc820a5 Include specification first. Bruno Haible <bruno@clisp.org> parents: 4142 diff changeset	28
4142 1e52316e571b Undefine and define-away `const' after inclusion Jim Meyering <jim@meyering.net> parents: 4140 diff changeset	29 #include <errno.h>
1e52316e571b Undefine and define-away `const' after inclusion Jim Meyering <jim@meyering.net> parents: 4140 diff changeset	30
4140 40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	31 #ifdef FULL_READ
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	32 # include "safe-read.h"
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	33 # define safe_rw safe_read
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	34 # define full_rw full_read
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	35 # undef const
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	36 # define const /* empty */
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	37 #else
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	38 # include "safe-write.h"
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	39 # define safe_rw safe_write
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	40 # define full_rw full_write
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	41 #endif
3403 9ab12ba48e48 Correct credits, as cccp.c no longer Jim Meyering <jim@meyering.net> parents: 2460 diff changeset	42
4140 40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	43 #ifdef FULL_READ
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	44 /* Set errno to zero upon EOF. */
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	45 # define ZERO_BYTE_TRANSFER_ERRNO 0
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	46 #else
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	47 /* Some buggy drivers return 0 when one tries to write beyond
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	48 a device's end. (Example: Linux 1.2.13 on /dev/fd0.)
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	49 Set errno to ENOSPC so they get a sensible diagnostic. */
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	50 # define ZERO_BYTE_TRANSFER_ERRNO ENOSPC
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	51 #endif
4002 9fcf64c770ed Orthogonal approach to read()/write() that handles EINTR and counts > 2^31 Bruno Haible <bruno@clisp.org> parents: 3403 diff changeset	52
4140 40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	53 /* Write(read) COUNT bytes at BUF to(from) descriptor FD, retrying if
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	54 interrupted or if a partial write(read) occurs. Return the number
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	55 of bytes transferred.
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	56 When writing, set errno if fewer than COUNT bytes are written.
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	57 When reading, if fewer than COUNT bytes are read, you must examine
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	58 errno to distinguish failure from EOF (errno == 0). */
3403 9ab12ba48e48 Correct credits, as cccp.c no longer Jim Meyering <jim@meyering.net> parents: 2460 diff changeset	59 size_t
4140 40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	60 full_rw (int fd, const void *buf, size_t count)
179 c8185437a5d1 . Jim Meyering <jim@meyering.net> parents: diff changeset	61 {
4140 40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	62 size_t total = 0;
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	63 const char *ptr = buf;
181 983c0e170fc4 . Jim Meyering <jim@meyering.net> parents: 180 diff changeset	64
4140 40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	65 while (count > 0)
179 c8185437a5d1 . Jim Meyering <jim@meyering.net> parents: diff changeset	66 {
4140 40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	67 size_t n_rw = safe_rw (fd, ptr, count);
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	68 if (n_rw == (size_t) -1)
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	69 break;
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	70 if (n_rw == 0)
179 c8185437a5d1 . Jim Meyering <jim@meyering.net> parents: diff changeset	71 {
4140 40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	72 errno = ZERO_BYTE_TRANSFER_ERRNO;
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	73 break;
179 c8185437a5d1 . Jim Meyering <jim@meyering.net> parents: diff changeset	74 }
4140 40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	75 total += n_rw;
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	76 ptr += n_rw;
40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	77 count -= n_rw;
179 c8185437a5d1 . Jim Meyering <jim@meyering.net> parents: diff changeset	78 }
4002 9fcf64c770ed Orthogonal approach to read()/write() that handles EINTR and counts > 2^31 Bruno Haible <bruno@clisp.org> parents: 3403 diff changeset	79
4140 40c9aa461079 Rework so that it may serve to define full_read, too. Jim Meyering <jim@meyering.net> parents: 4002 diff changeset	80 return total;
179 c8185437a5d1 . Jim Meyering <jim@meyering.net> parents: diff changeset	81 }

Mercurial > hg > octave-lojdl > gnulib-hg

annotate lib/full-write.c @ 7302:8a1a9361108c