Re: [Libguestfs] [PATCH 1/2] filesystem_walk: more information into tsk_dirent

On Monday 04 July 2016 00:00:59 Matteo Cafasso wrote: > Access, modification, last status change and creation time in > Unix format as for statns. > > Number of links pointing to a given entry. > > If the entry is a symbolic link, report its target path. > > A new flag (DIRENT_COMPRESSED 0x04) indicating whether the file is > compressed using native filesystem compression support. > > Signed-off-by: Matteo Cafasso <noxdafox(a)gmail.com&gt; > --- > daemon/tsk.c | 39 +++++++++++++++++++++++++++++++-------- > generator/actions.ml | 34 ++++++++++++++++++++++++++++++++++ > generator/structs.ml | 20 ++++++++++---------- > 3 files changed, 75 insertions(+), 18 deletions(-) > > diff --git a/daemon/tsk.c b/daemon/tsk.c > index 446213e..8657bf3 100644 > --- a/daemon/tsk.c > +++ b/daemon/tsk.c > @@ -38,7 +38,8 @@ > enum tsk_dirent_flags { > DIRENT_UNALLOC = 0x00, > DIRENT_ALLOC = 0x01, > - DIRENT_REALLOC = 0x02 > + DIRENT_REALLOC = 0x02, > + DIRENT_COMPRESSED = 0x04 > }; > > static int open_filesystem (const char *, TSK_IMG_INFO **, TSK_FS_INFO **); > @@ -108,6 +109,7 @@ fswalk_callback (TSK_FS_FILE *fsfile, const char *path, void *data) > { > int ret = 0; > CLEANUP_FREE char *fname = NULL; > + CLEANUP_FREE char *flink = NULL; > struct guestfs_int_tsk_dirent dirent; > > /* Ignore ./ and ../ */ > @@ -122,20 +124,38 @@ fswalk_callback (TSK_FS_FILE *fsfile, const char *path, void *data) > return TSK_WALK_ERROR; > } > > + /* Set dirent fields */ > + memset (&dirent, 0, sizeof dirent); > + > dirent.tsk_inode = fsfile->name->meta_addr; > dirent.tsk_type = file_type (fsfile); > dirent.tsk_size = (fsfile->meta != NULL) ? fsfile->meta->size : -1; > dirent.tsk_name = fname; > dirent.tsk_flags = file_flags (fsfile); > - dirent.tsk_spare1 = dirent.tsk_spare2 = dirent.tsk_spare3 = > - dirent.tsk_spare4 = dirent.tsk_spare5 = dirent.tsk_spare6 = > - dirent.tsk_spare7 = dirent.tsk_spare8 = dirent.tsk_spare9 = > - dirent.tsk_spare10 = dirent.tsk_spare11 = 0; > + > + if (fsfile->meta != NULL) { > + dirent.tsk_nlink = fsfile->meta->nlink; > + dirent.tsk_atime_sec = fsfile->meta->atime; > + dirent.tsk_atime_nsec = fsfile->meta->atime_nano; > + dirent.tsk_mtime_sec = fsfile->meta->mtime; > + dirent.tsk_mtime_nsec = fsfile->meta->mtime_nano; > + dirent.tsk_ctime_sec = fsfile->meta->ctime; > + dirent.tsk_ctime_nsec = fsfile->meta->ctime_nano; > + dirent.tsk_crtime_sec = fsfile->meta->crtime; > + dirent.tsk_crtime_nsec = fsfile->meta->crtime_nano; > + > + ret = asprintf (&flink, "%s", fsfile->meta->link); > + if (ret < 0) { > + perror ("asprintf"); > + return TSK_WALK_ERROR; > + } The asprintf is simply duplicating the string, so strdup can be a better (and faster) alternative. OTOH, why do you need to duplicate fsfile->meta->link at all, given that the copy will be free'd at the end of the function?

> + > + dirent.tsk_link = flink; > + } Also note that NULL values for FString in structs cannot be returned in daemon calls, you need to have empty strings for the unset values. > ret = send_dirent_info (&dirent); > - ret = (ret == 0) ? TSK_WALK_CONT : TSK_WALK_ERROR; > > - return ret; > + return (ret == 0) ? TSK_WALK_CONT : TSK_WALK_ERROR; Unrelated change. > } > > /* Inspect fsfile to identify its type. */ > @@ -175,7 +195,7 @@ file_type (TSK_FS_FILE *fsfile) > return 'u'; > } > > -/* Inspect fsfile to retrieve the file allocation state. */ > +/* Inspect fsfile to retrieve file allocation and compression status. */ > static int > file_flags (TSK_FS_FILE *fsfile) > { > @@ -188,6 +208,9 @@ file_flags (TSK_FS_FILE *fsfile) > else > flags |= DIRENT_ALLOC; > > + if (fsfile->meta && fsfile->meta->flags & TSK_FS_META_FLAG_COMP) > + flags |= DIRENT_COMPRESSED; > + > return flags; > } > > diff --git a/generator/actions.ml b/generator/actions.ml > index e0931b8..1591863 100644 > --- a/generator/actions.ml > +++ b/generator/actions.ml > @@ -3615,8 +3615,42 @@ This generally implies the metadata has been reallocated to a new file. > Therefore, information such as file type and file size > might not correspond with the ones of the original deleted entry. > > +=item 0x0004 > + > +The bit is set to C<1> when the file is compressed using filesystem > +native compression support (NTFS). The API is not able to detect > +application level compression. > + > =back > > +=item 'tsk_atime_sec' > + > +=item 'tsk_atime_nsec' > + > +=item 'tsk_mtime_sec' > + > +=item 'tsk_mtime_nsec' > + > +=item 'tsk_ctime_sec' > + > +=item 'tsk_ctime_nsec' > + > +=item 'tsk_crtime_sec' > + > +=item 'tsk_crtime_nsec' > + > +Respectively, access, modification, last status change and creation > +time in Unix format in seconds and nanoseconds. > + > +=item 'tsk_nlink' > + > +Number of file names pointing to this entry. > + > +=item 'tsk_link' > + > +If the entry is a symbolic link, this field will contain the path > +to the target file. > + > =back > > The C<tsk_type> field will contain one of the following characters: > diff --git a/generator/structs.ml b/generator/structs.ml > index eb8931f..029bc3a 100644 > --- a/generator/structs.ml > +++ b/generator/structs.ml > @@ -454,17 +454,17 @@ let structs = [ > "tsk_size", FInt64; > "tsk_name", FString; > "tsk_flags", FUInt32; > + "tsk_atime_sec", FInt64; > + "tsk_atime_nsec", FInt64; > + "tsk_mtime_sec", FInt64; > + "tsk_mtime_nsec", FInt64; > + "tsk_ctime_sec", FInt64; > + "tsk_ctime_nsec", FInt64; > + "tsk_crtime_sec", FInt64; > + "tsk_crtime_nsec", FInt64; > + "tsk_nlink", FInt64; > + "tsk_link", FString; > "tsk_spare1", FInt64; > - "tsk_spare2", FInt64; > - "tsk_spare3", FInt64; > - "tsk_spare4", FInt64; > - "tsk_spare5", FInt64; > - "tsk_spare6", FInt64; > - "tsk_spare7", FInt64; > - "tsk_spare8", FInt64; > - "tsk_spare9", FInt64; > - "tsk_spare10", FInt64; > - "tsk_spare11", FInt64; > ]; > s_camel_name = "TSKDirent" }; > > -- > 2.8.1 > > _______________________________________________ > Libguestfs mailing list > Libguestfs(a)redhat.com > https://www.redhat.com/mailman/listinfo/libguestfs _______________________________________________ Libguestfs mailing list Libguestfs(a)redhat.com https://www.redhat.com/mailman/listinfo/libguestfs