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Bug#658639: marked as done (kfreebsd-9: 'write' system call violates POSIX standard)

Your message dated Tue, 21 Oct 2014 11:33:49 +0000
with message-id <E1XgXhF-0006dh-6L@franck.debian.org>
and subject line Bug#765606: Removed package(s) from unstable
has caused the Debian Bug report #658639,
regarding kfreebsd-9: 'write' system call violates POSIX standard
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
658639: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=658639
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Source: kfreebsd-9
Severity: important
Tags: upstream

When a write() cannot transfer as many bytes as requested (because of a file
limit), it fails instead of transferring as many bytes as there is room to
write.

This is a violation of the POSIX standard:
http://pubs.opengroup.org/onlinepubs/007904975/functions/write.html

fsize-lim.c (attached) illustrates the problem. With a freebsd kernel, the
output is:
failed when adding 27 bytes after 59994 bytes (error: File too large)

The expected output (like with a linux kernel) should be:
added 6 bytes instead of 27 bytes after 59994 bytes
failed when adding 27 bytes after 60000 bytes (error: File too large)


-- System Information:
Debian Release: wheezy/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: kfreebsd-amd64 (x86_64)

Kernel: kFreeBSD 9.0-1-amd64
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Shell: /bin/sh linked to /bin/dash

#include <unistd.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <signal.h>
#include <errno.h>
#include <string.h>

#define TARGETSIZE	80000
#define LIMSIZE		60000
#define PATTSIZE	27


int main(void)
{
	struct rlimit lim;
	int fd;
	ssize_t retc;
	size_t count = 0;
	const char pattern[PATTSIZE] = "Hello world!";
	
	signal(SIGXFSZ, SIG_IGN);
	lim.rlim_cur = LIMSIZE; 
	setrlimit(RLIMIT_FSIZE, &lim);

	fd = open("result.txt", O_WRONLY|O_CREAT|O_TRUNC, S_IRUSR|S_IWUSR);

	while (count < TARGETSIZE) {
		retc = write(fd, pattern, PATTSIZE);

		if (retc < PATTSIZE && retc > 0)
			fprintf(stderr,
			        "added %zi bytes instead of %u bytes after %zu bytes\n",
				retc, PATTSIZE, count);
		else if (retc < 0) {
			fprintf(stderr,
			        "failed when adding %u bytes after %zu bytes (error: %s)\n",
				PATTSIZE, count, strerror(errno));
			break;
		}
		count += retc;
	}

	close(fd);

	return 0;
}

--- End Message ---
--- Begin Message --- 
Version: 9.2-2+rm

Dear submitter,

as the package kfreebsd-9 has just been removed from the Debian archive
unstable we hereby close the associated bug reports.  We are sorry
that we couldn't deal with your issue properly.

For details on the removal, please see https://bugs.debian.org/765606

The version of this package that was in Debian prior to this removal
can still be found using http://snapshot.debian.org/.

This message was generated automatically; if you believe that there is
a problem with it please contact the archive administrators by mailing
ftpmaster@ftp-master.debian.org.

Debian distribution maintenance software
pp.
Scott Kitterman (the ftpmaster behind the curtain)

--- End Message ---
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