| Commit message (Collapse) | Author | Age | Files | Lines |
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This includes various code cleanups:
(a) A regression test for RHBZ#580246.
(b) Use write instead of fwrite to write out the tar file. This is
just because the error handling of write seems to be better
specified and easier to use.
(c) Use size_t instead of int for length.
(d) Clearer debug messages when in verbose mode.
(cherry picked from commit de7ef2a0fdcbcddfd35ecb8ee2804e1ca0968454)
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The problem was this sequence of events:
(1) File transfer goes through OK.
(2) pclose returns failure (because 'tar' subprocess failed)
(3) We try to cancel the transfer by calling cancel_receive.
Step (3) fails because the transfer (as far as the library is
concerned) has succeeded, so causing a hang.
The more fundamental reason why we see steps (1) and (2) is that
'tar' does NOT fail immediately if there is a write error. Instead
it continues reading and discarding the input until the end of the
input before giving "Error exit delayed from previous errors".
IMHO this is a bug with tar, since an ENOSPC write error should
be fatal for tar.
(cherry picked from commit 07f4b20ae959069fca41756b0dc103ec5fa99754)
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The RPC stubs already prefix the command name to error messages.
The daemon doesn't have to do this. As a (small) benefit this also
makes the daemon slightly smaller.
Code in the daemon such as:
if (argv[0] == NULL) {
reply_with_error ("passed an empty list");
return NULL;
}
now results in error messages like this:
><fs> command ""
libguestfs: error: command: passed an empty list
(whereas previously you would have seen ..command: command:..)
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git grep -l 'strncmp *([^=]*== *0'|xargs \
perl -pi -e 's/\bstrncmp( *\(.*?\)) *== *0\b/STREQLEN$1/g'
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* daemon/proto.c (send_chunk): Don't ignore socket-write error.
* daemon/proto.c (send_file_end): Return "int", not void,
so we can propagate send_chunk failure to caller.
* daemon/daemon.h (send_file_end): Update prototype.
* daemon/tar.c (do_tar_out, do_tgz_out): Update uses of send_file_end.
* daemon/upload.c (do_download): Likewise.
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* src/generator.ml: Update all rules to handle Dev_or_Path.
(the above changes to generator.ml are mostly mechanical)
Emit a use of REQUIRE_ROOT_OR_RESOLVE_DEVICE.
* daemon/upload.c (do_download): Remove use of
REQUIRE_ROOT_OR_RESOLVE_DEVICE, now that it's automatically done
in calling code.
* daemon/file.c (do_file): Likewise.
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Nearly every file-related function in daemons/*.c is affected:
Remove this pair of statements from each affected do_* function:
- NEED_ROOT (return -1);
- ABS_PATH (dir, return -1);
and change the type of the corresponding parameter to "const char *".
* src/generator.ml: Emit NEED_ROOT just once, even when there are two or
more Pathname args.
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Use this command:
git grep -l -w IS_DEVICE|xargs perl -pi -e \
's/\b(?:IS_DEVICE)\b( \(.*?,) (.*?)\)/RESOLVE_DEVICE$1 return $2)/'
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- don't leak the file descriptor along error paths
- can't use those macros in FileIn functions
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