Capture rpm-3.0.3 examples from "Maximum RPM".
CVS patchset: 5306 CVS date: 2002/02/09 19:21:34
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# Makes the Maxumum RPM example programs
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# Scott Bronson, 20 Mar 1999
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# NOTE: if you do not have libdb1, change this makefile to use libdb
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# (or whatever database library rpm was compiled with).
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all: dumprpm showdb showdb2
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dumprpm: dumprpm.c
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gcc -Wall dumprpm.c -lrpm -lintl -lgz -o dumprpm
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showdb: showdb.c
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gcc -Wall showdb.c -lrpm -lintl -ldb1 -lgz -o showdb
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showdb2: showdb2.c
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gcc -Wall showdb2.c -lrpm -lintl -ldb1 -lgz -o showdb2
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clean:
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rm -f dumprpm showdb showdb2
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readme
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Scott Bronson
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4 Oct 99
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These are the example programs from MaximumRPM, updated to today's rpmlib.
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You can find MaximumRPM on the http://www.rpm.org/ site.
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To build these, edit the makefile as appropriate (if you're using gcc,
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you should not have to change anything), then "make all". 3 utilities
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will be built:
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dumprpm: % dumprpm filename
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Dumps a textual description of the the contents of the named RPM
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file on disk.
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showdb: % showdb rpmname
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Dumps a textual description of the named RPM. The RPM must be
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currently installed in the database.
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showdb2: % showdb2 rpmname
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Dumps a textual description of the named RPM, like showdb. However,
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uses a database query rather than a brute-force scan to locate the
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rpm (should be much more efficient).
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You will also find the string.txt file. This documents the only
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difficulty I had updating these programs.
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/* Example 1 from Maximum RPM book by Edward C. Bailey
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* Updated for 2.5.6 Mar 99 by Scott Bronson
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* Updated again for 3.0.3, 4 Oct 99.
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <rpm/rpmlib.h>
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int main( int argc, char **argv )
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{
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HeaderIterator iter;
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Header h, sig;
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int_32 itertag, type, count;
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void *p = NULL;
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char *name;
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FD_t fd;
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int stat;
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if( argc == 1 ) {
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fd = fdDup( STDIN_FILENO );
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} else {
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fd = fdOpen( argv[1], O_RDONLY, 0644 );
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}
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if( !fdValid(fd) ) {
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perror( "open" );
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exit( 1 );
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}
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stat = rpmReadPackageInfo( fd, &sig, &h );
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if( stat ) {
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fprintf( stderr, "rpmReadPackageInfo error status: %d\n%s\n",
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stat, strerror(errno) );
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exit( stat );
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}
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headerGetEntry( h, RPMTAG_NAME, &type, (void**)&name, &count );
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if( headerIsEntry(h,RPMTAG_PREIN) ) {
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printf( "There is a preinstall script for %s\n", name );
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}
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if( headerIsEntry(h,RPMTAG_POSTIN) ) {
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printf( "There is a postinstall script for %s\n", name );
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}
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/* NOTE:
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* This is actually rather a ridiculous thing to do, since headerDump
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* will incorrectly assume header types (RPMTAG_NAME, RPMTAG_RELEASE,
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* RPMTAG_SUMMARY). Since we're passing a signature, the correct types
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* would be (RPMSIGTAG_SIZE, RPMSIGTAG_PGP, and RPMSIGTAG_MD5).
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* TO FIX:
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* I think rpm's tagtable.c should define an rpmSigTable global var.
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* This is the perfect dual to rpmTagTable and would be passed to
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* headerDump when appropriate. It looks like someone intended to do
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* this at one time, but never finished it?
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*/
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printf( "Dumping signatures...\n" );
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/* Use HEADER_DUMP_INLINE to include inline dumps of header items */
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headerDump( sig, stdout, HEADER_DUMP_INLINE, rpmTagTable );
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rpmFreeSignature( sig );
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printf( "Iterating through the header...\n" );
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iter = headerInitIterator( h );
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while( headerNextIterator( iter, &itertag, &type, &p, &count ) ) {
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/* printf( "itertag=%04d, type=%08lX, p=%08lX, c=%08lX\n",
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(int)itertag, (long)type, (long)p, (long)count ); */
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switch( itertag ) {
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case RPMTAG_SUMMARY:
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if( type == RPM_I18NSTRING_TYPE ) {
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/* We'll only print out the first string if there's an array */
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printf( "The Summary: \"%s\"\n", *(char**)p );
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}
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if( type == RPM_STRING_TYPE ) {
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printf( "The Summary: \"%s\"\n", (char*)p );
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}
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break;
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case RPMTAG_FILENAMES:
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printf( "There are %d files in %s\n", count, name );
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break;
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}
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/* rpmlib allocates a buffer to return these two values... */
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if( type == RPM_STRING_ARRAY_TYPE || type == RPM_I18NSTRING_TYPE ) {
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free( p );
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}
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}
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headerFreeIterator( iter );
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headerFree( h );
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return 0;
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}
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<a href="Makefile">Makefile<a><p>
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<a href="dumprpm.c">dumprpm.c<a><p>
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<a href="README">README<a><p>
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<a href="showdb.c">showdb.c<a><p>
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<a href="showdb2.c">showdb2.c<a><p>
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<a href="string.txt">string.txt<a><p>
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/* Example 2 from Maximum RPM book by Edward C. Bailey
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* Updated for 2.5.6 20 Mar 99 by Scott Bronson
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* Updated again for 3.0.3 4 Oct 99 by Scott Bronson
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*/
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/* This iterates through all RPMs by name, using strcmp
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* to find the RPM named on the command line. See Example 3
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* for a much better way of doing this
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <rpm/rpmlib.h>
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int main( int argc, char **argv )
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{
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Header h;
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int offset;
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int_32 type, count;
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char *name;
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rpmdb db;
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rpmReadConfigFiles( NULL, NULL );
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printf( "Calling rpmdbOpen\n" );
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if( rpmdbOpen( "", &db, O_RDONLY, 0644 ) != 0 ) {
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fprintf( stderr, "cannot open database!\n" );
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exit( 1 );
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}
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printf( "rpmdbOpen done.\n" );
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offset = rpmdbFirstRecNum( db );
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while( offset ) {
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h = rpmdbGetRecord( db, offset );
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if( !h ) {
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fprintf( stderr, "Header Read Failed!\n" );
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exit( 1 );
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}
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headerGetEntry( h, RPMTAG_NAME, &type, (void**)&name, &count );
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if( strcmp(name,argv[1]) == 0 ) {
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headerDump( h, stdout, 1, rpmTagTable );
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}
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headerFree( h );
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offset = rpmdbNextRecNum( db, offset );
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}
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rpmdbClose( db );
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return 0;
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}
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/* Example 3 from Maximum RPM book by Edward C. Bailey
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* Updated for 2.5.6 20 Mar 99 by Scott Bronson
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* Updated again for 3.0.3 4 Oct 99 by Scott Bronson
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*/
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/* This uses rpmlib to search the database for the RPM
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* named on the command line.
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <rpm/rpmlib.h>
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int main( int argc, char **argv )
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{
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Header h;
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int stat;
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rpmdb db;
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dbiIndexSet matches;
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if( argc != 2 ) {
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fprintf( stderr, "usage: showdb2 <search term>\n" );
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exit( 1 );
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}
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rpmReadConfigFiles( NULL, NULL );
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if( rpmdbOpen( "", &db, O_RDONLY, 0644 ) != 0 ) {
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fprintf( stderr, "cannot open RPM database.\n" );
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exit( 1 );
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}
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stat = rpmdbFindPackage( db, argv[1], &matches );
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printf( "Status is: %d\n", stat );
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if( stat == 0 ) {
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if( matches.count ) {
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printf( "Number of matches: %d\n", matches.count );
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h = rpmdbGetRecord( db, matches.recs[0].recOffset );
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if( h ) {
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headerDump( h, stdout, HEADER_DUMP_INLINE, rpmTagTable );
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headerFree( h );
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}
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}
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dbiFreeIndexRecord( matches );
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}
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rpmdbClose( db );
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return 0;
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}
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@ -0,0 +1,43 @@
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string.txt
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Scott Bronson
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bronson@trestle.com
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This describes the format of RPM_I18NSTRING_TYPE or RPM_STRING_ARRAY_TYPE,
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I could not find this documented anywhere except the source of rpmlib.
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This memory block consists of count charptrs pointing to strings further
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along in the block. A brief example for a count of 2 (as returned by
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headerGetEntry), using typedef to illustrate the structure:
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count = 2;
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typedef struct block { # beginning of malloc'd block
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char *c1 = &s1; # points to s1 below
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char *c2 = &s2; # points to s2 below
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char s1[] = "data for string 1";
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char s2[] = "data for string 2";
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} # end of malloc'd block
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And, if count were three, this would be the result:
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count = 2;
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typedef struct block { # beginning of malloc'd block
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char *c1 = &s1; # points to s1 below
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char *c2 = &s2; # points to s2 below
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char *c3 = &s3; # points to s2 below
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char s1[] = "data for string 1";
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char s2[] = "data for string 2";
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char s3[] = "data for string 3";
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} # end of malloc'd block
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Therefore, to print out all the strings in one of these blocks in order...
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(p and count are values returned by rpmlib)
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for( i=0; i<count; i++ ) {
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printf( "String %d: %s\n", i, *((char**)p+i) );
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}
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