1RPM2(3) User Contributed Perl Documentation RPM2(3)
2
6 RPM2 - Perl bindings for the RPM Package Manager API
7
9 use RPM2;
10 my $db = RPM2->open_rpm_db();
12 my $i = $db->find_all_iter();
14 print "The following packages are installed (aka, 'rpm -qa'):\n";
15 while (my $pkg = $i->next) {
16 print $pkg->as_nvre, "\n";
17 }
18 $i = $db->find_by_name_iter("kernel");
20 print "The following kernels are installed (aka, 'rpm -q kernel'):\n";
21 while (my $pkg = $i->next) {
22 print $pkg->as_nvre, " ", int($pkg->size()/1024), "k\n";
23 }
24 $i = $db->find_by_provides_iter("kernel");
26 print "The following packages provide 'kernel' (aka, 'rpm -q --whatprovides kernel'):\n";
27 while (my $pkg = $i->next) {
28 print $pkg->as_nvre, " ", int($pkg->size()/1024), "k\n";
29 }
30 print "The following packages are installed (aka, 'rpm -qa' once more):\n";
32 foreach my $pkg ($db->find_by_file("/bin/sh")) {
33 print $pkg->as_nvre, "\n";
34 }
35 my $pkg = RPM2->open_package("/tmp/XFree86-4.1.0-15.src.rpm");
37 print "Package opened: ", $pkg->as_nvre(), ", is source: ", $pkg->is_source_package, "\n";
38
40 The RPM2 module provides an object-oriented interface to querying both
41 the installed RPM database as well as files on the filesystem.
42
44 Pretty much all use of the class starts here. There are three main
45 entrypoints into the package -- either through the database of
46 installed rpms (aka the rpmdb), through a file on the filesystem (such
47 as kernel-2.4.9-31.src.rpm or kernel-2.4.9-31.i386.rpm, or via an rpm
48 transaction.
49 You can have multiple RPM databases open at once, as well as running
51 multiple queries on each. That being said if you expect to run a
52 transaction to install or erase some rpms, you will need to cause any
53 RPM2::DB and RPM2::PackageIterator objects to go out of scope. For
54 instance:
55 $db = RPM2->open_rpm_db();
57 $i = $db->find_by_name("vim");
58 $t = create_transaction();
59 while($pkg = $i->next()) {
60 $t->add_erase($pkg);
61 }
62 $t->run();
63 Would end up in a dead lock waiting for $db, and $i (the RPM2::DB and
65 RPM2::PackageIterator) objects to releaase their read lock on the
66 database. The correct way of handling this then would be to do the
67 following before running the transaction:
68 $db = undef;
70 $i = undef;
71 That is to explicitly cause the RPM2::DB and RPM2::PackageIterator
73 objects to go out of scope.
74 open_rpm_db(-path => "/path/to/db")
76 As it sounds, it opens the RPM database, and returns it as an
77 object. The path to the database (i.e. "-path") is optional.
78 open_package("foo-1.1-14.noarch.rpm")
80 Opens a specific package (RPM or SRPM). Returns a Header object.
81 create_transaction(RPM2->vsf_default)
83 Creates an RPM2::Transaction. This can be used to install and
84 remove packages. It, also, exposes the dependency ordering
85 functionality. It takes as an optional argument verify signature
86 flags. The following flags are available:
87 RPM2->vsf_default
89 You don't ever have to specify this, but you could if you wanted to
90 do so. This will check headers, not require a files payload, and
91 support all the various hash and signature formats that rpm
92 supports.
93 RPM2->vsf_nohdrchk
95 Don't check the header.
96 RPM2->vsf_needpayload
98 Require that a files payload be part of the RPM (Chip is this
99 right?).
100 RPM2->vsf_nosha1header
102 RPM2->vsf_nomd5header
103 RPM2->vsf_nodsaheader
104 RPM2->vsf_norsaheader
105 RPM2->vsf_nosha1
106 RPM2->vsf_nomd5
107 RPM2->vsf_nodsa
108 RPM2->vsf_norsa
109
111 find_all_iter()
112 Returns an iterator object that iterates over the entire database.
113 find_all()
115 Returns an list of all of the results of the find_all_iter()
116 method.
117 find_by_file_iter($filename)
119 Returns an iterator that returns all packages that contain a given
120 file.
121 find_by_file($filename)
123 Ditto, except it just returns the list
124 find_by_name_iter($package_name)
126 You get the idea. This one is for iterating by package name.
127 find_by_name($package_name)
129 Ditto, except it returns a list.
130 find_by_provides_iter($provides_string)
132 This one iterates over provides.
133 find_by_provides($provides_string)
135 Ditto, except it returns a list.
136 find_by_requires_iter($requires_string)
138 This one iterates over requires.
139 find_by_requires($requires_string)
141 Ditto, except it returns a list.
142
144 Once you have a a database iterator, then you simply need to step
145 through all the different package headers in the result set via the
146 iterator.
147 next()
149 Return the next package header in the result set.
150 expand_iter()
152 Return the list of all the package headers in the result set of the
153 iterator.
154
156 In addition to the following methods, all tags have simple accessors;
157 $hdr->epoch() is equivalent to $hdr->tag('epoch').
158 The <=> and cmp operators can be used to compare versions of two
160 packages.
161 $hdr->tag($tagname)
163 Returns the value of the tag $tagname.
164 $hdr->tagformat($format)
166 TODO.
167 $hdr->is_source_package()
169 Returns a true value if the package is a source package, false
170 otherwise.
171 $hdr->filename()
173 Returns the filename of the package.
174 $hdr->offset()
176 Returns the rpm database offset for the package.
177 $hdr->as_nvre()
179 Returns a string formatted like:
180 epoch:name-version-release
182 If epoch is undefined for this package, it and the leading colon
184 are omitted.
185 $hdr->files()
187 TODO.
188 $hdr->changelog()
190 Returns a list of hash refs containing the change log data of the
191 package. The hash keys represent individual change log entries,
192 and their keys are: "time" (the time of the changelog entry),
193 "name" (the "name", ie. often the email address of the author of
194 the entry), and "text" (the text of the entry).
195
197 Transactions are what allow you to install, upgrade, and remove rpms.
198 Transactions are created, have elements added to them (i.e. package
199 headers) and are ran. When run the updates to the system and the rpm
200 database are treated as on "transaction" which is assigned a
201 transaction id. This can be queried in install packages as the
202 INSTALLTID, and for repackaged packages they have the REMOVETID set.
203 add_install($pkg, $upgrade)
205 Adds a package to a transaction for installation. If you want this
206 to be done as a package upgrade, then be sure to set the second
207 optional parameter to 1. It will return 0 on failure and 1 on
208 success. Note, this should be obvious, but the package header must
209 come from an rpm file, not from the RPM database.
210 add_erase($pkg)
212 Adds a package to a transaction for erasure. The package header
213 should come from the database (i.e. via an iterator) and not an rpm
214 file.
215 element_count()
217 Returns the number of elements in a transaction (this is the sum of
218 the install and erase elements.
219 close_db()
221 Closes the rpm database. This is needed for some ordering of
222 transactions for non-install purposes.
223 check()
225 Verify that the dependencies for this transaction are met. Returns
226 0 on failure and 1 on success.
227 order()
229 Order the elements in dependency order.
230 elements()
232 Return a list of elements as they are presently ordered. Note,
233 this returns the NEVR's not the package headers.
234 run()
236 Run the transaction. This will automatically check for dependency
237 satisfaction, and order the transaction.
238
240 Make package installation and removal better (-;.
241 Signature validation.
243
245 0.01 Initial release.
246 0.68 RPM 4.6 Support.
247 0.69 RPM 4.9 Support.
248
250 RPM2 was originally written by Chip Turner <cturner@pattern.net> and
251 contributions were made by numerous authors. It is currently maintained
252 by Lubomir Rintel <lkundrak@v3.sk>.
253 The source code is kept in a Git repository at
255 <https://github.com/lkundrak/perl-RPM2.git>.
256
258 Report the bugs (and feature requests) at
259 <http://rt.cpan.org/Public/Bug/Report.html?Queue=RPM2>. Alternatively,
260 you can report a bug by sending mail to <bug-RPM2@rt.cpan.org>.
261
263 This module is free software and is licensed under the same terms as
264 Perl itself.
265
267 perl. The original RPM module.
268perl v5.30.1 2020-01-30 RPM2(3)