| Commit message (Collapse) | Author | Age | Files | Lines |
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case_sensitive_path is undefined when the final path element doesn't
exist. Currently it returns an error, but this means that creating a
new file doesn't work as expected:
$ guestfish --rw -i -d windows touch 'win:c:\blah'
libguestfs: error: case_sensitive_path: blah no file or directory found with this name
We should allow this case (provided there is no trailing slash) so
that new files or directories can be created.
(cherry picked from commit 973581780d8a006f336684fef6762801402d775d)
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This is just code motion.
(cherry picked from commit ac0373bdecfabe6acf99d3662e5117de73fa2aef)
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The presumption is that all file descriptors should be created with
the close-on-exec flag set. The only exception are file descriptors
that we want passed through to exec'd subprocesses (mainly pipes and
stdin/stdout/stderr).
For open calls, we pass O_CLOEXEC as an extra flag, eg:
fd = open ("foo", O_RDONLY|O_CLOEXEC);
This is a Linux-ism, but using a macro we can easily make it portable.
For sockets, similarly:
sock = socket (..., SOCK_STREAM|SOCK_CLOEXEC, ...);
For accepted sockets, we use the Linux accept4 system call which
allows flags to be supplied, but we use the Gnulib 'accept4' module to
make this portable.
For dup, dup2, we use the Linux dup3 system call, and the Gnulib
modules 'dup3' and 'cloexec'.
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Callers are supposed to use the availability API to check for
functions that may not be available in particular builds of
libguestfs. If they don't do this, currently they tend to get obscure
error messages, eg:
libguestfs: error: zerofree: /dev/vda1: zerofree: No such file or directory
This commit changes the error message to explain what callers ought to
be doing instead:
libguestfs: error: zerofree: feature 'zerofree' is not available in this
build of libguestfs. Read 'AVAILABILITY' in the guestfs(3) man page for
how to check for the availability of features.
This patch makes the stubs check for availability. The stub code
changes to:
static void
zerofree_stub (XDR *xdr_in)
{
[...]
/* The caller should have checked before calling this. */
if (! optgroup_zerofree_available ()) {
reply_with_error ("feature '%s' is not available in this\n"
"build of libguestfs. Read 'AVAILABILITY' in the guestfs(3) man page for\n"
"how to check for the availability of features.",
"zerofree");
goto done;
}
[...]
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This commit tidies up the code by splitting out the path
element-searching code into a separate function.
Valgrind found that 'closedir' frees the 'struct dirent *', which
wasn't immediately obvious. So now we do the 'closedir' after all
operations which touch 'd->d_name'.
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Update all copyright dates to 2012.
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Remove some debug messages which were basically left over from when
the code was being developed.
However we leave debug messages where it is printing an external
command that is about to be executed, since those are useful.
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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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* daemon/realpath.c: Don't include "openat.h". not used.
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git grep -l 'strcasecmp *([^=]*== *0'| xargs \
perl -pi -e 's/\bstrcasecmp( *\(.*?\)) *== *0/STRCASEEQ$1/'
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Uses Gnulib implementation of openat which should be portable.
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This function handles an annoyance/peculiarity of the Linux
NTFS 3g driver, which is that it exports NTFS filesystems with
names case sensitive, even though under Windows they would be
case insensitive.
This causes problems because the location of (eg.) c:\windows
might appear as /windows or /WINDOWS (etc) depending on the
inconsequential details of how it was originally created.
Example of this problem on a real Windows guest:
><fs> file /windows/system32/config/system.log
libguestfs: error: file: access: /windows/system32/config/system.log: No such file or directory
><fs> case-sensitive-path /windows/system32/config/system.log
/WINDOWS/system32/config/system.LOG
><fs> file /WINDOWS/system32/config/system.LOG
MS Windows registry file, NT/2000 or above
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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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run this command:
git grep -l -w NEED_ROOT|xargs perl -pi -e \
's/(NEED_ROOT) \((.*?)\)/$1 (return $2)/'
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run this command:
git grep -l -w ABS_PATH|xargs perl -pi -e \
's/(?:ABS_PATH)( \(.*?,) (.*?)\)/ABS_PATH$1 return $2)/'
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