Fwd: [Rpm-python-list] How to handle remote rpm package file ?

[Nicolas Pinto <nicolas.pinto@xxxxxxxxx>]

---------- Forwarded message ----------
From: Nicolas Pinto <nicolas.pinto@xxxxxxxxx>
Date: Jul 20, 2005 4:25 PM
Subject: How to handle remote rpm package file ?
To: rpm-python-list@xxxxxxxxxxxxxx


Hi all,
 
 I'm trying to handle the installation/upgrade of a remote rpm file
(by http or ftp) with the rpm-python binding library.
 
 I know that the rpmlib provides a Fopen() function which retrieves
the file and give you the file descriptor; then you can call the
rpmReadPackageFile() function and get the header of the package (this
header is required to add the package to the transaction set).
 
 You can find a working C implementation at the end of this message.
 
 I tried to use the rpm.fd() function from rpm-python but I always
have this error :
 
 # python
 Python 2.2.3 (#1, Feb 14 2005, 14:38:30)
 [GCC 3.2.3 20030502 (Red Hat Linux 3.2.3-49)] on linux2
 Type "help", "copyright", "credits" or "license" for more information.
 >>> import rpm,urllib
 >>> url = "ftp://sunsite.auc.dk/projects/newrpms/www/htdocs/apt/redhat/en/i386/9.0/RPMS.newrpms/eboard-0.9.0-1.i386.rpm
"
 >>> f = urllib.urlopen(url)
 >>> f = rpm.fd(url, "u.ufdio")
 *** rpmfd_init(0xa0ed130,0xa0ed81c,(nil))
 0xa0ed130 -- fd (nil)
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
 rpm.error: (2, 'No such file or directory')
 >>>
 
 Moreover, rpm-python doesn't provide the rpmReadPackageFile()
function but only hdrFromFdno() which needs a file descriptor
number...
 
 So my question is : how to handle remote package with rpm-python ? Do
I have to retrieve the file using urllib and use it as a local package
?
 
 Thanks in advance.
 
 Nicolas Pinto
 
 
 
 A working C implementation (taken from rpmt-4.2.1:
http://isscvs.cern.ch:8180/cgi-bin/cvsweb.cgi/elfms/quattor/rpmt-4.2.1/?cvsroot=elfms)
:
 /*
  * Install or Upgrade a new package
  *
  * - ts        transaction set
  * - package    package file name
  * - upgrade    0 installation, 1 upgrading
  *
  */
 void rpmEts_AddInstallElement(rpmts ts, const char *package, int upgrade) {
 
     Header    hdr;
     FD_t    fd;
     int        err;
 
     /* read package header from file */
     printf("%s\n", package);
     fd = Fopen(package, "r.ufdio");
 
 
     if (fd == NULL || Ferror(fd)) {
         printf("error: cannot open file %s\n", package);
     rpmEtsExit(ts, 1);
     }
 
     rpmReadPackageFile(ts, fd, package, &hdr);
 
     if (hdr == NULL) {
         printf("failed to read header from package %s\n", package);
     rpmEtsExit(ts, 1);
     }
 
     Fclose(fd);
 
     /* add package to transaction set */
 
     err = rpmtsAddInstallElement(ts, hdr, strdup(package), upgrade, NULL);
 
     switch(err) {
         case 0: break;
         case 1: printf("I/O error reading file %s\n", package);
                 rpmEtsExit(ts, 1);
         case 2: printf("needs capabilities to isntall package %s\n", package);
                 rpmEtsExit(ts, 1);
     }
 
     headerFree(hdr);
 
     return;
 }