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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 06:03:02 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 06:03:02 +0000 |
commit | 4897093455a2bf08f3db3a1132cc2f6f5484d77c (patch) | |
tree | 9e6373544263f003139431fb4b08f9766e1ed530 /support/nfs/atomicio.c | |
parent | Initial commit. (diff) | |
download | nfs-utils-4897093455a2bf08f3db3a1132cc2f6f5484d77c.tar.xz nfs-utils-4897093455a2bf08f3db3a1132cc2f6f5484d77c.zip |
Adding upstream version 1:2.6.4.upstream/1%2.6.4upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'support/nfs/atomicio.c')
-rw-r--r-- | support/nfs/atomicio.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/support/nfs/atomicio.c b/support/nfs/atomicio.c new file mode 100644 index 0000000..0e81838 --- /dev/null +++ b/support/nfs/atomicio.c @@ -0,0 +1,57 @@ +/* + * Copyright (c) 2002 Marius Aamodt Eriksen <marius@monkey.org> + * Copyright (c) 1995,1999 Theo de Raadt. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/types.h> +#include <unistd.h> +#include <errno.h> + +#include "nfslib.h" + +/* + * ensure all of data on socket comes through. f==read || f==write + */ +ssize_t atomicio(ssize_t(*f) (int, void *, size_t), int fd, void *_s, size_t n) +{ + char *s = _s; + ssize_t res, pos = 0; + + while ((ssize_t)n > pos) { + res = (f) (fd, s + pos, n - pos); + switch (res) { + case -1: + if (errno == EINTR || errno == EAGAIN) + continue; + /* FALLTHRU */ + case 0: + if (pos != 0) + return pos; + return res; + default: + pos += res; + } + } + return pos; +} |