search for: guestfs_set_trac

This is very useful for debugging multithreaded programs. Rich.

...() from /lib64/libguestfs.so.0 > #4 0x00007fe3aa1fab2b in guestfs_impl_launch () from /lib64/libguestfs.so.0 > #5 0x00007fe3aa196b4d in guestfs_launch () from /lib64/libguestfs.so.0 > #6 0x00000000004116f8 in main () Before you call guestfs_launch(), call: guestfs_set_verbose (1); guestfs_set_trace (1); That should print (on stderr) a lot more information about what is going on. (http://libguestfs.org/guestfs-faq.1.html#how-do-i-debug-when-using-the-api) If printing on stderr is not convenient from your program, then you can also set up logging. See the example here: https://github.com/l...

...\ + fprintf (stderr, _("%s: cannot mix --ro and --rw options\n"), \ + program_name); \ + exit (EXIT_FAILURE); \ + } + #define OPTION_x \ guestfs_set_trace (g, 1) diff --git a/fuse/guestmount.c b/fuse/guestmount.c index 55b71d7..1b3abf9 100644 --- a/fuse/guestmount.c +++ b/fuse/guestmount.c @@ -884,7 +884,7 @@ main (int argc, char *argv[]) /* The command line arguments are broadly compatible with (a subset * of) guestfish. Thus we have to d...

https://bugzilla.redhat.com/show_bug.cgi?id=1175196 Currently if you write something like LIBGUESTFS_DEBUG=0 or LIBGUESTFS_DEBUG=true then it doesn't do what you probably expect. This patch series fixes that. Rich.

...{ > guestfs_h *g; > size_t i; > > g = guestfs_create (); > if (g == NULL) { > perror ("failed to create libguestfs handle"); > exit (EXIT_FAILURE); > } > > /* Set the trace flag so that we can see each libguestfs call. */ > guestfs_set_trace (g, 1); > > /* Create a raw-format sparse disk image, 512 MB in size. */ > if (guestfs_disk_create (g, "disk.img", "raw", UINT64_C(512)*1024*1024, > -1) == -1) > exit (EXIT_FAILURE); > > /* Add the disk image to l...

The existing mechanism was clunky, slow and used ~ 10 MB of local disk. Rich.

The error message: hivex_close: do_hivex_close: you must call 'hivex-open' first to initialize the hivex handle This is the process flow: g = guestfs_create (); guestfs_add_drive_opts (g, diskFile,GUESTFS_ADD_DRIVE_OPTS_FORMAT, "raw",-1); guestfs_launch (g) char **roots = guestfs_inspect_os (g); guestfs_inspect_os returns NULL, guestfs_last_error(g) returns

...if (ftruncate (fd, 512 * 1024 * 1024) == -1) { - perror ("disk.img: truncate"); - exit (EXIT_FAILURE); - } - if (close (fd) == -1) { - perror ("disk.img: close"); - exit (EXIT_FAILURE); } /* Set the trace flag so that we can see each libguestfs call. */ guestfs_set_trace (g, 1); + /* Create a raw-format sparse disk image, 512 MB in size. */ + if (guestfs_disk_create (g, "disk.img", "raw", UINT64_C(512)*1024*1024, + -1) == -1) + exit (EXIT_FAILURE); + /* Add the disk image to libguestfs. */ if (guestfs_add_...

On Tue, Apr 09, 2013 at 10:18:50AM -0400, Skippy VonDrake wrote: > Hello, > > Apologies upfront if posting to this list is inappropriate. > > I have an app that forks a process with calls qemu-nbd with an offset > into an image. > The app then uses libguestfs to attach the nbd device. > But it appears that qemu is failing. When you say "qemu is failing", do you

...--git a/guestfs.pod b/guestfs.pod index d8e4da3..b8379d0 100644 --- a/guestfs.pod +++ b/guestfs.pod @@ -983,6 +983,11 @@ used. See also L</QEMU WRAPPERS> above. +=item LIBGUESTFS_TRACE + +Set C<LIBGUESTFS_TRACE=1> to enable command traces. This +has the same effect as calling C<guestfs_set_trace (handle, 1)>. + =item TMPDIR Location of temporary directory, defaults to C</tmp>. diff --git a/src/generator.ml b/src/generator.ml index 765cb16..6184890 100755 --- a/src/generator.ml +++ b/src/generator.ml @@ -805,6 +805,32 @@ is passed to the appliance at boot time. See C<guest...

Hi, this patch series fixes few more issues discovered by Coverity. Thanks, Pino Toscano (6): tail: check the return value pf guestfs_set_pgroup daemon: btrfs: check end_stringsbuf return values everywhere java: use cleanup handlers for structs (lists) as return values lib: qemu: improve handling of FILE* p2v: check more return values p2v: fix possible close(-1) issue cat/tail.c

Hi ,all : thanks for helping me ! I am using libguestfs-1.28.1 on ubuntu 12.04 to manage vm disk created by KVM. I downloaded libguestfs-1.28.1.tar.gz ,and then executed (1) ./autogen.sh (2) ./configure (3) make (4) make check .there is the error. /usr/Libvmi/libguestfs-1.28.1/run --test guest-aux/make-fedora-img.pl md_create: feature 'mdadm' is not available in this

...NULL; /* Work around collectd bug with waitpid() after fork() */ signal (SIGCHLD, SIG_DFL); g = guestfs_create(); if (g == NULL) { ERROR(PLUGIN_NAME " plugin: failed to create libguestfs handle"); goto cont; //exit(EXIT_FAILURE); } guestfs_set_trace(g,1); //guestfs_set_verbose(g,1); if ( 0 != guestfs_set_backend (g, "direct") ) { ERROR(PLUGIN_NAME " plugin: guestfs_set_backend failed"); } cnt_drives = guestfs_add_domain (g, name, GUESTFS_ADD_DOMAIN_READONLY, 1, -1); if (cnt_drives ==...

Hello, I have a simple C program that uses libguestfs to extract info about disk usage from a libvirt domain. It works when ran manually as root, but fails when started as a systemd service. I'm attaching the service file, source code and verbose logs from both the successful manual run and from the service journal. SELinix is disabled. Error messages: libguestfs:

...0x00007fe3aa1fab2b in guestfs_impl_launch () from > /lib64/libguestfs.so.0 > > #5 0x00007fe3aa196b4d in guestfs_launch () from /lib64/libguestfs.so.0 > > #6 0x00000000004116f8 in main () > > Before you call guestfs_launch(), call: > > guestfs_set_verbose (1); > guestfs_set_trace (1); > > That should print (on stderr) a lot more information about what is > going on. (http://libguestfs.org/guestfs-faq.1.html#how-do-i- > debug-when-using-the-api) > > If printing on stderr is not convenient from your program, then you > can also set up logging. See the e...

...override the printing of verbose messages to stderr by setting up a callback. GUESTFS_EVENT_TRACE (payload type: message buffer) The callback function is called whenever a trace message is generated. This only applies if the trace flag ("guestfs_set_trace") is set. If no callback is registered: the messages are discarded unless the verbose flag is set in which case they are sent to stderr. You can override the printing of verbose messages to stderr by setting up a callback. guestfs_set_even...

Hi everyone, lately I've been getting familiar with library and working on slight re-layering of the library. It's about having locking layer in public API and tracing one layer below that (let's call it __t_ layer. I'm not very good at making up names, so this is temporary:) ). Then making sure that all generated public stuff call __t_ layer and all other internal stuff

...try? Here is the complete output from collectd: [2018-11-07 12:21:54] plugin_load: plugin "logfile" successfully loaded. [2018-11-07 12:21:54] plugin_load: plugin "syslog" successfully loaded. Before guestfs_create() UID: 0 Effective UID: 0 Before guestfs_set_verbose() Before guestfs_set_trace() Before guestfs_add_domain() libguestfs: trace: add_domain "wer" "readonly:true" libguestfs: opening libvirt handle: URI = NULL, auth = default+wrapper, flags = 0 libguestfs: successfully opened libvirt handle: conn = 0x7f7e70005210 libguestfs: trace: add_libvirt_dom (virDomai...

https://bugzilla.redhat.com/show_bug.cgi?id=836710 https://bugzilla.redhat.com/show_bug.cgi?id=836913 There are at least two related bugs going on: (1) Linux sync(2) system call doesn't send a write barrier to the disk, so in effect it doesn't force the hard disk to flush its cache. libguestfs used sync(2) to force changes to disk. We didn't expect that qemu was caching anything

This is the same as the previous patch, but the partition type is now chosen automatically from mbr or gpt, unless the user expresses a preference. https://gb.redhat.com/archives/libguestfs/2012-January/msg00136.html Rich.