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+usage: h5diff [OPTIONS] file1 file2 [obj1[ obj2]]
+ file1 File name of the first HDF5 file
+ file2 File name of the second HDF5 file
+ [obj1] Name of an HDF5 object, in absolute path
+ [obj2] Name of an HDF5 object, in absolute path
+
+ ERROR
+ --enable-error-stack Prints messages from the HDF5 error stack as they occur.
+ Optional value 2 also prints file open errors.
+ OPTIONS
+ -h, --help
+ Print a usage message and exit.
+ -V, --version
+ Print version number and exit.
+ -r, --report
+ Report mode. Print differences.
+ -v --verbose
+ Verbose mode. Print differences information and list of objects.
+ -vN --verbose=N
+ Verbose mode with level. Print differences and list of objects.
+ Level of detail depends on value of N:
+ 0 : Identical to '-v' or '--verbose'.
+ 1 : All level 0 information plus one-line attribute status summary.
+ 2 : All level 1 information plus extended attribute status report.
+ 3 : All level 2 information plus file names.
+ -q, --quiet
+ Quiet mode. Do not produce output.
+ --vol-value-1 Value (ID) of the VOL connector to use for opening the
+ first HDF5 file specified
+ --vol-name-1 Name of the VOL connector to use for opening the first
+ HDF5 file specified
+ --vol-info-1 VOL-specific info to pass to the VOL connector used for
+ opening the first HDF5 file specified
+ --vol-value-2 Value (ID) of the VOL connector to use for opening the
+ second HDF5 file specified
+ --vol-name-2 Name of the VOL connector to use for opening the second
+ HDF5 file specified
+ --vol-info-2 VOL-specific info to pass to the VOL connector used for
+ opening the second HDF5 file specified
+ If none of the above options are used to specify a VOL for a file, then
+ the VOL named by HDF5_VOL_CONNECTOR (or the native VOL connector,
+ if that environment variable is unset) will be used
+ --vfd-value-1 Value (ID) of the VFL driver to use for opening the
+ first HDF5 file specified
+ --vfd-name-1 Name of the VFL driver to use for opening the first
+ HDF5 file specified
+ --vfd-info-1 VFD-specific info to pass to the VFL driver used for
+ opening the first HDF5 file specified
+ --vfd-value-2 Value (ID) of the VFL driver to use for opening the
+ second HDF5 file specified
+ --vfd-name-2 Name of the VFL driver to use for opening the second
+ HDF5 file specified
+ --vfd-info-2 VFD-specific info to pass to the VFL driver used for
+ opening the second HDF5 file specified
+ --follow-symlinks
+ Follow symbolic links (soft links and external links and compare the)
+ links' target objects.
+ If symbolic link(s) with the same name exist in the files being
+ compared, then determine whether the target of each link is an existing
+ object (dataset, group, or named datatype) or the link is a dangling
+ link (a soft or external link pointing to a target object that does
+ not yet exist).
+ - If both symbolic links are dangling links, they are treated as being
+ the same; by default, h5diff returns an exit code of 0.
+ If, however, --no-dangling-links is used with --follow-symlinks,
+ this situation is treated as an error and h5diff returns an
+ exit code of 2.
+ - If only one of the two links is a dangling link,they are treated as
+ being different and h5diff returns an exit code of 1.
+ If, however, --no-dangling-links is used with --follow-symlinks,
+ this situation is treated as an error and h5diff returns an
+ exit code of 2.
+ - If both symbolic links point to existing objects, h5diff compares the
+ two objects.
+ If any symbolic link specified in the call to h5diff does not exist,
+ h5diff treats it as an error and returns an exit code of 2.
+ --no-dangling-links
+ Must be used with --follow-symlinks option; otherwise, h5diff shows
+ error message and returns an exit code of 2.
+ Check for any symbolic links (soft links or external links) that do not
+ resolve to an existing object (dataset, group, or named datatype).
+ If any dangling link is found, this situation is treated as an error
+ and h5diff returns an exit code of 2.
+ -c, --compare
+ List objects that are not comparable
+ -N, --nan
+ Avoid NaNs detection
+ -n C, --count=C
+ Print differences up to C. C must be a positive integer.
+ -d D, --delta=D
+ Print difference if (|a-b| > D). D must be a positive number. Where a
+ is the data point value in file1 and b is the data point value in file2.
+ Can not use with '-p' or '--use-system-epsilon'.
+ -p R, --relative=R
+ Print difference if (|(a-b)/b| > R). R must be a positive number. Where a
+ is the data point value in file1 and b is the data point value in file2.
+ Can not use with '-d' or '--use-system-epsilon'.
+ --use-system-epsilon
+ Print difference if (|a-b| > EPSILON), EPSILON is system defined value. Where a
+ is the data point value in file1 and b is the data point value in file2.
+ If the system epsilon is not defined,one of the following predefined
+ values will be used:
+ FLT_EPSILON = 1.19209E-07 for floating-point type
+ DBL_EPSILON = 2.22045E-16 for double precision type
+ Can not use with '-p' or '-d'.
+ --exclude-path "path"
+ Exclude the specified path to an object when comparing files or groups.
+ If a group is excluded, all member objects will also be excluded.
+ The specified path is excluded wherever it occurs.
+ This flexibility enables the same option to exclude either objects that
+ exist only in one file or common objects that are known to differ.
+
+ When comparing files, "path" is the absolute path to the excluded;
+ object; when comparing groups, "path" is similar to the relative
+ path from the group to the excluded object. This "path" can be
+ taken from the first section of the output of the --verbose option.
+ For example, if you are comparing the group /groupA in two files and
+ you want to exclude /groupA/groupB/groupC in both files, the exclude
+ option would read as follows:
+ --exclude-path "/groupB/groupC"
+
+ If there are multiple paths to an object, only the specified path(s)
+ will be excluded; the comparison will include any path not explicitly
+ excluded.
+ This option can be used repeatedly to exclude multiple paths.
+
+ --exclude-attribute "path/to/object/with/attribute"
+ Exclude attributes on the specified path to an object when comparing files or groups.
+
+ If there are multiple paths to an object, only the specified path(s)
+ will be excluded; the comparison will include any path not explicitly
+ excluded.
+ This option can be used repeatedly to exclude multiple paths.
+
+ Modes of output:
+ Default mode: print the number of differences found and where they occurred
+ -r Report mode: print the above plus the differences
+ -v Verbose mode: print the above plus a list of objects and warnings
+ -q Quiet mode: do not print output
+
+ File comparison:
+ If no objects [obj1[ obj2]] are specified, the h5diff comparison proceeds as
+ a comparison of the two files' root groups. That is, h5diff first compares
+ the names of root group members, generates a report of root group objects
+ that appear in only one file or in both files, and recursively compares
+ common objects.
+
+ Object comparison:
+ 1) Groups
+ First compares the names of member objects (relative path, from the
+ specified group) and generates a report of objects that appear in only
+ one group or in both groups. Common objects are then compared recursively.
+ 2) Datasets
+ Array rank and dimensions, datatypes, and data values are compared.
+ 3) Datatypes
+ The comparison is based on the return value of H5Tequal.
+ 4) Symbolic links
+ The paths to the target objects are compared.
+ (The option --follow-symlinks overrides the default behavior when
+ symbolic links are compared.).
+
+ Subsetting options:
+ --no-compact-subset Disable compact form of subsetting and allow the use
+ of "[" in dataset names.
+ Subsetting is available by using the fcompact form of subsetting, as follows:
+ obj1 /foo/mydataset[START;STRIDE;COUNT;BLOCK]
+ It is not required to use all parameters, but until the last parameter value used,
+ all of the semicolons (;) are required, even when a parameter value is not specified. Example:
+ obj1 /foo/mydataset[START;;COUNT;BLOCK]
+ obj1 /foo/mydataset[START]
+ The STRIDE, COUNT, and BLOCK parameters are optional and will default to 1 in
+ each dimension. START is optional and will default to 0 in each dimension.
+ Each of START, STRIDE, COUNT, and BLOCK must be a comma-separated list of integers with
+ one integer for each dimension of the dataset.
+
+ Exit code:
+ 0 if no differences, 1 if differences found, 2 if error
+
+ Examples of use:
+ 1) h5diff file1 file2 /g1/dset1 /g1/dset2
+ Compares object '/g1/dset1' in file1 with '/g1/dset2' in file2
+
+ 2) h5diff file1 file2 /g1/dset1
+ Compares object '/g1/dset1' in both files
+
+ 3) h5diff file1 file2
+ Compares all objects in both files
+
+ Notes:
+ file1 and file2 can be the same file.
+ Use h5diff file1 file1 /g1/dset1 /g1/dset2 to compare
+ '/g1/dset1' and '/g1/dset2' in the same file
+
+EXIT CODE: 1