[Bug 13317] rsync returns success when target filesystem is full

[samba-bugs at samba.org]

https://bugzilla.samba.org/show_bug.cgi?id=13317

--- Comment #18 from Rui DeSousa <rui.desousa at icloud.com> ---
I also wrote a little util as well; I get the correct error in write spot.

[postgres at hades ~]$ cat 000000010000005E00000017 | ./fwrite/fwrite
arch/000000010000005E00000017
fwrite: write: Disc quota exceeded
[postgres at hades ~]$ echo $?
1
[postgres at hades ~]$ du -h arch/000000010000005E00000017.GghJVR 
1.9M    arch/000000010000005E00000017.GghJVR


Here's the code:

#include <sys/stat.h>
#include <err.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>


#define    BUFSIZE 131072

int
main(int argc, char *argv[])
{
  int fd, r, w;
  char *buf;
  char *name;

  if (argc != 2) {
    fprintf(stderr, "usage: fwrite [file]\n");
    exit(1);
  }

  if ((buf = malloc(BUFSIZE)) == NULL)
    err(1, "malloc");

  ++argv;
  if ((name = (char *) malloc(strlen(*argv) + 10)) == NULL)
    err(1, "malloc");

  strcat(strcpy(name, *argv), ".XXXXXX");

  if ((fd = mkstemp(name)) < 0)
    err(1, "mkstemp");

  while ((r = read(STDIN_FILENO, buf, BUFSIZE)) > 0)
    if ((w = write(fd, buf, r)) == -1)
      err(1, "write");

  if (r < 0)
   err(1, "read");

  if (fsync(fd) != 0)
   err(1, "fsync");

  if (close(fd) != 0)
   err(1, "close");

  if (rename(name, *argv) != 0)
   err(1, "rename");

  free(name);
  exit(0);
}

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