On Jan 23, 2004, at 1:40 PM, Ulf Lamping wrote:
Well, if you press the ok button in the file save (as) dialog, this
starts the function "file_open_ok_cb" in file gtk/file_dlg.c.
I would hope that it wouldn't, given that "file_open_ok_cb()" is the
function called for the "OK" button in the "File->Open" dialog.
It should be calling "file_save_as_ok_cb()" - and, in fact, it is.
The actual file access is in one of the calls named cf_xy(), probably
the cf_open() call.
No, "cf_save()", in the case of "file_save_as_ok_cb()".
Hint: Have a call to simple_dialog() to make a message to the user.
"cf_save()" will, if you're saving a temporary capture file, in its
entirety, in standard libpcap format, first try to call "rename()" to
move the file to its target location.
If "rename()" returns 0, it is presumed to have succeeded, and no
message is displayed. Perhaps "rename()" returns 0 even when it fails
on Windows; if that were the case, it would at best be an extreme
bogosity on Windows, and at worst an actual bug. However, Microsoft's
documentation suggests that it does *not* return 0 when it fails, but
behaves sufficiently similarly to UNIX's "rename()" as to be usable in
Ethereal:
http://msdn.microsoft.com/library/en-us/vclib/html/
_crt_rename.2c_._wrename.asp?frame=true
If "rename()" doesn't return 0, then, if it returns EXDEV, that's
assumed to mean "you can't just move the file because the target is on
a different file system", and Ethereal copies the file and removes the
old file instead. Otherwise, it uses "simple_dialog()" to put up an
error message alert box.
If the "rename()" got EXDEV, or you're doing a "Save As" of a permanent
file in the same format that it's currently in, a raw binary copy of
the file will be done. If the routine that copies it,
"copy_binary_file()", fails, it will pop up an error message alert box
using "simple_dialog()".
If you're saving the file in a format other than the one it's already
in, or saving only some of the packets in the file, "cf_save()" will
call "wtap_dump_open()" to create the output file. If that fails,
it'll call "simple_dialog()" to put up an error message alert box.