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- To debug fakeroot, one may try:
-
- Start faked in xterm 1:
- $ faked --foreground --debug
- 51452231:280
- # First number here is the 'FAKEROOTKEY', second is the pid of
- # faked. Both to be used later.
- # Later, when programs go using faked, a _lot_ of debug output
- # will be shown here.
-
- Send signals to faked in xterm 2:
- #Whenever you want to get info about the internal inode data
- #faked is keeping, do:
- kill -s USR1 280
-
- And the 'real' program runs (at your choise) in another xterm [3], or gdb
- In an xterm, do:
- $ LD_PRELOAD=/usr/lib/libfakeroot/libfakeroot.so.0
- $ FAKEROOTKEY=51452231 # number output by faked, xterm 1
- $ export LD_PRELOAD FAKEROOTKEY
- $ my-prog #start anything you like.
-
- Or, if you want to run the programme in a gdb session:
- To make specifying the paths easier, put libfakeroot.c, libfakeroot.so.0.0.1
- and the binary you want to run in the same directory (libfakeroot.so.0.0.1
- is put in ./.libs/libfakeroot.so.0.0.1 by libtool during compilation, copy
- it out there).
- Then, in gdb do:
- $ gdb ./ls #as an example, I run 'ls'.
- (gdb) set env LD_PRELOAD=/home/joost/maintain/vpathlib/libfakeroot-0.1/libfakeroot.so.0.0.1
- (gdb) set env FAKEROOTKEY=51452231 #number from xterm 1.
- # Or wherever you've got your libfakeroot.so.0.0.1
- (gdb) break libfakeroot.c:181
- Breakpoint 1 at 0x4000ecc8: file libfakeroot.c, line 181.
- (gdb) run -al
- Starting program: /home/joost/maintain/vpathlib/libfakeroot-0.1/ls -al
- Temporarily disabling shared library breakpoints:
- 1
-
- Breakpoint 1, __lxstat (ver=134556187, file_name=0x0, statbuf=0x80529c8)
- at libfakeroot.c:208
- 208 struct stat *statbuf){
-
- # OK, and there I've found a bug -- ver can only be '0' in the
- # current libc6 (glibc2). Unfortunately, it didn't reproduce.
-