15e15c778a539681074e151694013f76e45e21ba
[oweals/opkg-lede.git] / libopkg / opkg_install.c
1 /* opkg_install.c - the opkg package management system
2
3    Carl D. Worth
4
5    Copyright (C) 2001 University of Southern California
6
7    This program is free software; you can redistribute it and/or
8    modify it under the terms of the GNU General Public License as
9    published by the Free Software Foundation; either version 2, or (at
10    your option) any later version.
11
12    This program is distributed in the hope that it will be useful, but
13    WITHOUT ANY WARRANTY; without even the implied warranty of
14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15    General Public License for more details.
16 */
17
18 #include "includes.h"
19 #include <errno.h>
20 #include <dirent.h>
21 #include <glob.h>
22 #include <time.h>
23 #include <signal.h>
24 #ifndef __USE_GNU
25 typedef void (*sighandler_t)(int);
26 #endif
27
28 #include "pkg.h"
29 #include "pkg_hash.h"
30 #include "pkg_extract.h"
31
32 #include "opkg_install.h"
33 #include "opkg_configure.h"
34 #include "opkg_download.h"
35 #include "opkg_remove.h"
36
37 #include "opkg_utils.h"
38 #include "opkg_message.h"
39 #include "opkg_cmd.h"
40 #include "opkg_defines.h"
41
42 #include "sprintf_alloc.h"
43 #include "file_util.h"
44 #include "str_util.h"
45 #include "xsystem.h"
46 #include "user.h"
47 #include "libbb/libbb.h"
48
49 static int verify_pkg_installable(opkg_conf_t *conf, pkg_t *pkg);
50 static int unpack_pkg_control_files(opkg_conf_t *conf, pkg_t *pkg);
51
52 static int prerm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
53 static int prerm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
54 static int prerm_deconfigure_conflictors(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors);
55 static int prerm_deconfigure_conflictors_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors);
56 static int preinst_configure(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
57 static int preinst_configure_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
58 static int check_data_file_clashes(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
59 static int check_data_file_clashes_change(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
60 static int check_data_file_clashes_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
61 static int backup_modified_conffiles(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
62 static int backup_modified_conffiles_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
63 static int postrm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
64 static int postrm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
65
66 static int remove_obsolesced_files(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
67 static int install_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
68 static int remove_disappeared(opkg_conf_t *conf, pkg_t *pkg);
69 static int install_data_files(opkg_conf_t *conf, pkg_t *pkg);
70 static int resolve_conffiles(opkg_conf_t *conf, pkg_t *pkg);
71
72 static int cleanup_temporary_files(opkg_conf_t *conf, pkg_t *pkg);
73
74 static int user_prefers_old_conffile(const char *file, const char *backup);
75
76 static char *backup_filename_alloc(const char *file_name);
77 static int backup_make_backup(opkg_conf_t *conf, const char *file_name);
78 static int backup_exists_for(const char *file_name);
79 static int backup_remove(const char *file_name);
80
81
82 int opkg_install_from_file(opkg_conf_t *conf, const char *filename)
83 {
84      int err, cmp;
85      pkg_t *pkg, *old;
86      char *old_version, *new_version;
87
88      pkg = pkg_new();
89
90      err = pkg_init_from_file(pkg, filename);
91      if (err) {
92           return err;
93      }
94
95      if (!pkg->architecture) {
96           opkg_message(conf, OPKG_ERROR, "Package %s has no Architecture defined.\n", pkg->name);
97           return -EINVAL;
98      }
99
100      /* XXX: CLEANUP: hash_insert_pkg has a nasty side effect of possibly
101         freeing the pkg that we pass in. It might be nice to clean this up
102         if possible.  */
103      pkg = hash_insert_pkg(&conf->pkg_hash, pkg, 1,conf);
104      old = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg->name);
105
106      if (old) {
107           old_version = pkg_version_str_alloc(old);
108           new_version = pkg_version_str_alloc(pkg);
109
110           cmp = pkg_compare_versions(old, pkg);
111           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
112              cmp = -1 ;                                       /* then we force opkg to downgrade */ 
113                                                               /* We need to use a value < 0 because in the 0 case we are asking to */
114                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
115           } 
116           if (cmp > 0) {
117                  opkg_message(conf, OPKG_NOTICE,
118                               "Not downgrading package %s on %s from %s to %s.\n",
119                               old->name, old->dest->name, old_version, new_version);
120                  pkg->state_want = SW_DEINSTALL;
121                  pkg->state_flag |= SF_OBSOLETE;
122                  free(old_version);
123                  free(new_version);
124                  return 0;
125           } else {
126                free(old_version);
127                free(new_version);
128           }
129      }
130
131      opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
132      return opkg_install_pkg(conf, pkg,0);
133 }
134
135 opkg_error_t opkg_install_by_name(opkg_conf_t *conf, const char *pkg_name)
136 {
137      int cmp, err = 0;
138      pkg_t *old, *new;
139      char *old_version, *new_version;
140
141      opkg_message(conf, OPKG_DEBUG2, " Getting old  from pkg_hash_fetch \n" );
142      old = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg_name);
143      if ( old ) 
144         opkg_message(conf, OPKG_DEBUG2, " Old versions from pkg_hash_fetch %s \n",  old->version );
145     
146      opkg_message(conf, OPKG_DEBUG2, " Getting new  from pkg_hash_fetch \n" );
147      new = pkg_hash_fetch_best_installation_candidate_by_name(conf, pkg_name, &err);
148      if ( new ) 
149         opkg_message(conf, OPKG_DEBUG2, " New versions from pkg_hash_fetch %s \n",  new->version );
150
151 /* Pigi Basically here is broken the version stuff.
152    What's happening is that nothing provide the version to differents 
153    functions, so the returned struct is always the latest.
154    That's why the install by name don't work.
155 */
156      opkg_message(conf, OPKG_DEBUG2, " Versions from pkg_hash_fetch in %s ", __FUNCTION__ );
157
158      if ( old ) 
159         opkg_message(conf, OPKG_DEBUG2, " old %s ", old->version );
160      if ( new ) 
161         opkg_message(conf, OPKG_DEBUG2, " new %s ", new->version );
162      opkg_message(conf, OPKG_DEBUG2, " \n");
163
164      if (new == NULL) {
165           if (err)
166             return err;
167           else
168             return OPKG_PKG_HAS_NO_CANDIDATE;
169      }
170
171      new->state_flag |= SF_USER;
172      if (old) {
173           old_version = pkg_version_str_alloc(old);
174           new_version = pkg_version_str_alloc(new);
175
176           cmp = pkg_compare_versions(old, new);
177           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
178              opkg_message(conf, OPKG_DEBUG, " Forcing downgrade \n");
179              cmp = -1 ;                                       /* then we force opkg to downgrade */ 
180                                                               /* We need to use a value < 0 because in the 0 case we are asking to */
181                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
182           } 
183           opkg_message(conf, OPKG_DEBUG, 
184                        "Comparing visible versions of pkg %s:"
185                        "\n\t%s is installed "
186                        "\n\t%s is available "
187                        "\n\t%d was comparison result\n",
188                        pkg_name, old_version, new_version, cmp);
189           if (cmp == 0 && !conf->force_reinstall) {
190                opkg_message(conf, OPKG_NOTICE,
191                             "Package %s (%s) installed in %s is up to date.\n",
192                             old->name, old_version, old->dest->name);
193                free(old_version);
194                free(new_version);
195                return 0;
196           } else if (cmp > 0) {
197                opkg_message(conf, OPKG_NOTICE,
198                             "Not downgrading package %s on %s from %s to %s.\n",
199                             old->name, old->dest->name, old_version, new_version);
200                free(old_version);
201                free(new_version);
202                return 0;
203           } else if (cmp < 0) {
204                new->dest = old->dest;
205                old->state_want = SW_DEINSTALL;    /* Here probably the problem for bug 1277 */
206           }
207      }
208
209      /* XXX: CLEANUP: The error code of opkg_install_by_name is really
210         supposed to be an opkg_error_t, but opkg_install_pkg could
211         return any kind of integer, (might be errno from a syscall,
212         etc.). This is a real mess and will need to be cleaned up if
213         anyone ever wants to make a nice libopkg. */
214
215      opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
216      return opkg_install_pkg(conf, new,0);
217 }
218
219 opkg_error_t opkg_install_multi_by_name(opkg_conf_t *conf, const char *pkg_name)
220 {
221      abstract_pkg_vec_t *providers = pkg_hash_fetch_all_installation_candidates (&conf->pkg_hash, pkg_name);
222      int i;
223      opkg_error_t err;
224      abstract_pkg_t *ppkg ;
225
226      if (providers == NULL)
227           return OPKG_PKG_HAS_NO_CANDIDATE;
228
229      for (i = 0; i < providers->len; i++) {
230           ppkg = abstract_pkg_vec_get(providers, i);
231           opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_by_name %d \n",__FUNCTION__, i);
232           err = opkg_install_by_name(conf, ppkg->name);
233           if (err)
234                return err;
235 /* XXX Maybe ppkg should be freed ? */
236      }
237      return 0;
238 }
239
240 /*
241  * Walk dependence graph starting with pkg, collect packages to be
242  * installed into pkgs_needed, in dependence order.
243  */
244 int pkg_mark_dependencies_for_installation(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *pkgs_needed)
245 {
246      int i, err;
247      pkg_vec_t *depends = pkg_vec_alloc();
248      char **unresolved = NULL;
249      int ndepends;
250
251      ndepends = pkg_hash_fetch_unsatisfied_dependencies(conf, 
252                                                         pkg, depends, 
253                                                         &unresolved);
254
255      if (unresolved) {
256           opkg_message(conf, OPKG_ERROR,
257                        "%s: Cannot satisfy the following dependencies for %s:\n\t",
258                        conf->force_depends ? "Warning" : "ERROR", pkg->name);
259           while (*unresolved) {
260                opkg_message(conf, OPKG_ERROR, " %s", *unresolved);
261                unresolved++;
262           }
263           opkg_message(conf, OPKG_ERROR, "\n");
264           if (! conf->force_depends) {
265                opkg_message(conf, OPKG_INFO,
266                             "This could mean that your package list is out of date or that the packages\n"
267                             "mentioned above do not yet exist (try 'opkg update'). To proceed in spite\n"
268                             "of this problem try again with the '-force-depends' option.\n");
269                pkg_vec_free(depends);
270                return OPKG_PKG_DEPS_UNSATISFIED;
271           }
272      }
273
274      if (ndepends <= 0) {
275           pkg_vec_free(depends);
276           return 0;
277      }
278
279      for (i = 0; i < depends->len; i++) {
280           pkg_t *dep = depends->pkgs[i];
281           /* The package was uninstalled when we started, but another
282              dep earlier in this loop may have depended on it and pulled
283              it in, so check first. */
284           if ((dep->state_status != SS_INSTALLED)
285               && (dep->state_status != SS_UNPACKED)
286               && (dep->state_want != SW_INSTALL)) {
287
288                /* Mark packages as to-be-installed */
289                dep->state_want = SW_INSTALL;
290
291                /* Dependencies should be installed the same place as pkg */
292                if (dep->dest == NULL) {
293                     dep->dest = pkg->dest;
294                }
295
296                err = pkg_mark_dependencies_for_installation(conf, dep, pkgs_needed);
297                if (err) {
298                     pkg_vec_free(depends);
299                     return err;
300                }
301           }
302      }
303      if (pkgs_needed)
304           pkg_vec_insert(pkgs_needed, pkg);
305
306      pkg_vec_free(depends);
307
308      return 0;
309 }
310
311 int satisfy_dependencies_for(opkg_conf_t *conf, pkg_t *pkg)
312 {
313      int i, err;
314      pkg_vec_t *depends = pkg_vec_alloc();
315      pkg_t *dep;
316      char **unresolved = NULL;
317      int ndepends;
318
319      ndepends = pkg_hash_fetch_unsatisfied_dependencies(conf, 
320                                                         pkg, depends, 
321                                                         &unresolved);
322
323      if (unresolved) {
324           opkg_message(conf, OPKG_ERROR,
325                        "%s: Cannot satisfy the following dependencies for %s:\n\t",
326                        conf->force_depends ? "Warning" : "ERROR", pkg->name);
327           while (*unresolved) {
328                opkg_message(conf, OPKG_ERROR, " %s", *unresolved);
329                unresolved++;
330           }
331           opkg_message(conf, OPKG_ERROR, "\n");
332           if (! conf->force_depends) {
333                opkg_message(conf, OPKG_INFO,
334                             "This could mean that your package list is out of date or that the packages\n"
335                             "mentioned above do not yet exist (try 'opkg update'). To proceed in spite\n"
336                             "of this problem try again with the '-force-depends' option.\n");
337                pkg_vec_free(depends);
338                return OPKG_PKG_DEPS_UNSATISFIED;
339           }
340      }
341
342      if (ndepends <= 0) {
343           pkg_vec_free(depends);
344           return 0;
345      }
346
347      /* Mark packages as to-be-installed */
348      for (i=0; i < depends->len; i++) {
349           /* Dependencies should be installed the same place as pkg */
350           if (depends->pkgs[i]->dest == NULL) {
351                depends->pkgs[i]->dest = pkg->dest;
352           }
353           depends->pkgs[i]->state_want = SW_INSTALL;
354      }
355
356      for (i = 0; i < depends->len; i++) {
357           dep = depends->pkgs[i];
358           /* The package was uninstalled when we started, but another
359              dep earlier in this loop may have depended on it and pulled
360              it in, so check first. */
361           if ((dep->state_status != SS_INSTALLED)
362               && (dep->state_status != SS_UNPACKED)) {
363                opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
364                err = opkg_install_pkg(conf, dep,0);
365                /* mark this package as having been automatically installed to
366                 * satisfy a dependancy */
367                dep->auto_installed = 1;
368                if (err) {
369                     pkg_vec_free(depends);
370                     return err;
371                }
372           }
373      }
374
375      pkg_vec_free(depends);
376
377      return 0;
378 }
379
380
381 /* check all packages have their dependences satisfied, e.g., in case an upgraded package split */ 
382 int opkg_satisfy_all_dependences(opkg_conf_t *conf)
383 {
384      if (conf->nodeps == 0) {
385           int i;
386           pkg_vec_t *installed = pkg_vec_alloc();
387           pkg_hash_fetch_all_installed(&conf->pkg_hash, installed);
388           for (i = 0; i < installed->len; i++) {
389                pkg_t *pkg = installed->pkgs[i];
390                satisfy_dependencies_for(conf, pkg);
391           }
392           pkg_vec_free(installed);
393      }
394      return 0;
395 }
396
397
398 static int check_conflicts_for(opkg_conf_t *conf, pkg_t *pkg)
399 {
400      int i;
401      pkg_vec_t *conflicts = NULL;
402      int level;
403      const char *prefix;
404      if (conf->force_depends) {
405           level = OPKG_NOTICE;
406           prefix = "Warning";
407      } else {
408           level = OPKG_ERROR;
409           prefix = "ERROR";
410      }
411
412      if (!conf->force_depends)
413           conflicts = (pkg_vec_t *)pkg_hash_fetch_conflicts(&conf->pkg_hash, pkg);
414
415      if (conflicts) {
416           opkg_message(conf, level,
417                        "%s: The following packages conflict with %s:\n\t", prefix, pkg->name);
418           i = 0;
419           while (i < conflicts->len)
420                opkg_message(conf, level, " %s", conflicts->pkgs[i++]->name);
421           opkg_message(conf, level, "\n");
422           pkg_vec_free(conflicts);
423           return OPKG_PKG_DEPS_UNSATISFIED;
424      }
425      return 0;
426 }
427
428 static int update_file_ownership(opkg_conf_t *conf, pkg_t *new_pkg, pkg_t *old_pkg)
429 {
430      str_list_t *new_list = pkg_get_installed_files(new_pkg);
431      str_list_elt_t *iter, *niter;
432
433      for (iter = str_list_first(new_list), niter = str_list_next(new_list, iter); 
434              iter; 
435              iter = niter, niter = str_list_next(new_list, niter)) {
436           char *new_file = (char *)iter->data;
437           pkg_t *owner = file_hash_get_file_owner(conf, new_file);
438           if (!new_file)
439                opkg_message(conf, OPKG_ERROR, "Null new_file for new_pkg=%s\n", new_pkg->name);
440           if (!owner || (owner == old_pkg))
441                file_hash_set_file_owner(conf, new_file, new_pkg);
442      }
443      if (old_pkg) {
444           str_list_t *old_list = pkg_get_installed_files(old_pkg);
445           for (iter = str_list_first(old_list), niter = str_list_next(old_list, iter); 
446                   iter; 
447                   iter = niter, niter = str_list_next(old_list, niter)) {
448                char *old_file = (char *)iter->data;
449                pkg_t *owner = file_hash_get_file_owner(conf, old_file);
450                if (owner == old_pkg) {
451                     /* obsolete */
452                     hash_table_insert(&conf->obs_file_hash, old_file, old_pkg);
453                }
454           }
455           pkg_free_installed_files(old_pkg);
456      }
457      pkg_free_installed_files(new_pkg);
458      return 0;
459 }
460
461 static int verify_pkg_installable(opkg_conf_t *conf, pkg_t *pkg)
462 {
463     /* XXX: FEATURE: Anything else needed here? Maybe a check on free space? */
464
465     /* sma 6.20.02:  yup; here's the first bit */
466     /* 
467      * XXX: BUG easy for cworth
468      * 1) please point the call below to the correct current root destination
469      * 2) we need to resolve how to check the required space for a pending pkg, 
470      *    my diddling with the .opk file size below isn't going to cut it.
471      * 3) return a proper error code instead of 1
472      */
473      int comp_size, blocks_available;
474      char *root_dir;
475     
476      if (!conf->force_space && pkg->installed_size != NULL) {
477           root_dir = pkg->dest ? pkg->dest->root_dir : conf->default_dest->root_dir;
478           blocks_available = get_available_blocks(root_dir);
479
480           comp_size = strtoul(pkg->installed_size, NULL, 0);
481           /* round up a blocks count without doing fancy-but-slow casting jazz */ 
482           comp_size = (int)((comp_size + 1023) / 1024);
483
484           if (comp_size >= blocks_available) {
485                opkg_message(conf, OPKG_ERROR,
486                             "Only have %d available blocks on filesystem %s, pkg %s needs %d\n", 
487                             blocks_available, root_dir, pkg->name, comp_size);
488                return ENOSPC;
489           }
490      }
491      return 0;
492 }
493
494 static int unpack_pkg_control_files(opkg_conf_t *conf, pkg_t *pkg)
495 {
496      int err;
497      char *conffiles_file_name;
498      char *root_dir;
499      FILE *conffiles_file;
500
501      sprintf_alloc(&pkg->tmp_unpack_dir, "%s/%s-XXXXXX", conf->tmp_dir, pkg->name);
502
503      pkg->tmp_unpack_dir = mkdtemp(pkg->tmp_unpack_dir);
504      if (pkg->tmp_unpack_dir == NULL) {
505           opkg_message(conf, OPKG_ERROR,
506                        "%s: Failed to create temporary directory '%s': %s\n",
507                        __FUNCTION__, pkg->tmp_unpack_dir, strerror(errno));
508           return errno;
509      }
510
511      err = pkg_extract_control_files_to_dir(pkg, pkg->tmp_unpack_dir);
512      if (err) {
513           return err;
514      }
515
516      /* XXX: CLEANUP: There might be a cleaner place to read in the
517         conffiles. Seems like I should be able to get everything to go
518         through pkg_init_from_file. If so, maybe it would make sense to
519         move all of unpack_pkg_control_files to that function. */
520
521      /* Don't need to re-read conffiles if we already have it */
522      if (!nv_pair_list_empty(&pkg->conffiles)) {
523           return 0;
524      }
525
526      sprintf_alloc(&conffiles_file_name, "%s/conffiles", pkg->tmp_unpack_dir);
527      if (! file_exists(conffiles_file_name)) {
528           free(conffiles_file_name);
529           return 0;
530      }
531     
532      conffiles_file = fopen(conffiles_file_name, "r");
533      if (conffiles_file == NULL) {
534           fprintf(stderr, "%s: failed to open %s: %s\n",
535                   __FUNCTION__, conffiles_file_name, strerror(errno));
536           free(conffiles_file_name);
537           return errno;
538      }
539      free(conffiles_file_name);
540
541      while (1) {
542           char *cf_name;
543           char *cf_name_in_dest;
544
545           cf_name = file_read_line_alloc(conffiles_file);
546           if (cf_name == NULL) {
547                break;
548           }
549           str_chomp(cf_name);
550           if (cf_name[0] == '\0') {
551                continue;
552           }
553
554           /* Prepend dest->root_dir to conffile name.
555              Take pains to avoid multiple slashes. */
556           root_dir = pkg->dest->root_dir;
557           if (conf->offline_root)
558                /* skip the offline_root prefix */
559                root_dir = pkg->dest->root_dir + strlen(conf->offline_root);
560           sprintf_alloc(&cf_name_in_dest, "%s%s", root_dir,
561                         cf_name[0] == '/' ? (cf_name + 1) : cf_name);
562
563           /* Can't get an md5sum now, (file isn't extracted yet).
564              We'll wait until resolve_conffiles */
565           conffile_list_append(&pkg->conffiles, cf_name_in_dest, NULL);
566
567           free(cf_name);
568           free(cf_name_in_dest);
569      }
570
571      fclose(conffiles_file);
572
573      return 0;
574 }
575
576 static int pkg_remove_orphan_dependent(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg) 
577 {
578     int i, j, found;
579     char *buf, *d_str;
580     pkg_t *p;
581
582     if (!old_pkg) 
583         return 0;
584
585     if (old_pkg->depends_count == 0) 
586         return 0;
587
588     for (i=0;i<old_pkg->depends_count;i++) {
589         found = 0;
590         for (j=0;j<pkg->depends_count;j++) {
591             if (!strcmp(old_pkg->depends_str[i], pkg->depends_str[j])) {
592                 found = 1;
593                 break;
594             }
595         }
596         if (found)
597             continue;
598         d_str = old_pkg->depends_str[i];
599         buf = xcalloc(1, strlen (d_str) + 1);
600         j=0;
601         while (d_str[j] != '\0' && d_str[j] != ' ') {
602             buf[j]=d_str[j];
603             ++j;
604         }
605         buf[j]='\0';
606         buf = xrealloc (buf, strlen (buf) + 1);
607         p = pkg_hash_fetch_installed_by_name (&conf->pkg_hash, buf);
608         if (!p) {
609             fprintf(stderr, "The pkg %s had been removed!!\n", buf);
610             free(buf);
611             continue;
612         }
613         if (p->auto_installed) {
614             int deps;
615             abstract_pkg_t **dependents;
616             deps = pkg_has_installed_dependents(conf, NULL, p, &dependents);
617             if (deps == 0) {
618                 opkg_message (conf, OPKG_NOTICE,"%s was autoinstalled but is now orphaned, remove it.\n", buf);
619                 opkg_remove_pkg(conf, p, 0);
620             } else 
621                 opkg_message (conf, OPKG_INFO, "%s was autoinstalled and is still required by %d installed packages\n", buf, deps);
622         }
623         free(buf);
624     }
625     return 0;
626 }
627
628 /* returns number of installed replacees */
629 int pkg_get_installed_replacees(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *installed_replacees)
630 {
631      abstract_pkg_t **replaces = pkg->replaces;
632      int replaces_count = pkg->replaces_count;
633      int i, j;
634      for (i = 0; i < replaces_count; i++) {
635           abstract_pkg_t *ab_pkg = replaces[i];
636           pkg_vec_t *pkg_vec = ab_pkg->pkgs;
637           if (pkg_vec) {
638                for (j = 0; j < pkg_vec->len; j++) {
639                     pkg_t *replacee = pkg_vec->pkgs[j];
640                     if (!pkg_conflicts(pkg, replacee))
641                          continue;
642                     if (replacee->state_status == SS_INSTALLED) {
643                          pkg_vec_insert(installed_replacees, replacee);
644                     }
645                }
646           }
647      }
648      return installed_replacees->len;
649 }
650
651 int pkg_remove_installed_replacees(opkg_conf_t *conf, pkg_vec_t *replacees)
652 {
653      int i;
654      int replaces_count = replacees->len;
655      for (i = 0; i < replaces_count; i++) {
656           pkg_t *replacee = replacees->pkgs[i];
657           int err;
658           replacee->state_flag |= SF_REPLACE; /* flag it so remove won't complain */
659           err = opkg_remove_pkg(conf, replacee,0);
660           if (err)
661                return err;
662      }
663      return 0;
664 }
665
666 /* to unwind the removal: make sure they are installed */
667 int pkg_remove_installed_replacees_unwind(opkg_conf_t *conf, pkg_vec_t *replacees)
668 {
669      int i, err;
670      int replaces_count = replacees->len;
671      for (i = 0; i < replaces_count; i++) {
672           pkg_t *replacee = replacees->pkgs[i];
673           if (replacee->state_status != SS_INSTALLED) {
674                opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
675                err = opkg_install_pkg(conf, replacee,0);
676                if (err)
677                     return err;
678           }
679      }
680      return 0;
681 }
682
683 int caught_sigint = 0;
684 static void opkg_install_pkg_sigint_handler(int sig)
685 {
686      caught_sigint = sig;
687 }
688
689 /* compares versions of pkg and old_pkg, returns 0 if OK to proceed with installation of pkg, 1 otherwise */
690 static int opkg_install_check_downgrade(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg, int message)
691 {         
692      if (old_pkg) {
693           char message_out[15];
694           char *old_version = pkg_version_str_alloc(old_pkg);
695           char *new_version = pkg_version_str_alloc(pkg);
696           int cmp = pkg_compare_versions(old_pkg, pkg);
697           int rc = 0;
698
699           memset(message_out,'\x0',15);
700           strncpy (message_out,"Upgrading ",strlen("Upgrading ")); 
701           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
702              cmp = -1 ;                                       /* then we force opkg to downgrade */ 
703              strncpy (message_out,"Downgrading ",strlen("Downgrading "));         /* We need to use a value < 0 because in the 0 case we are asking to */
704                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
705           } 
706
707           if (cmp > 0) {
708                opkg_message(conf, OPKG_NOTICE,
709                             "Not downgrading package %s on %s from %s to %s.\n",
710                             old_pkg->name, old_pkg->dest->name, old_version, new_version);
711                rc = 1;
712           } else if (cmp < 0) {
713                opkg_message(conf, OPKG_NOTICE,
714                             "%s%s on %s from %s to %s...\n",
715                             message_out, pkg->name, old_pkg->dest->name, old_version, new_version);
716                pkg->dest = old_pkg->dest;
717                rc = 0;
718           } else /* cmp == 0 */ {
719                if (conf->force_reinstall) {
720                     opkg_message(conf, OPKG_NOTICE,
721                                  "Reinstalling %s (%s) on %s...\n",
722                                  pkg->name, new_version, old_pkg->dest->name);
723                     pkg->dest = old_pkg->dest;
724                     rc = 0;
725                } else {
726                     opkg_message(conf, OPKG_NOTICE,
727                                  "Not installing %s (%s) on %s -- already installed.\n",
728                                  pkg->name, new_version, old_pkg->dest->name);
729                     rc = 1;
730                }
731           } 
732           free(old_version);
733           free(new_version);
734           return rc;
735      } else {
736       char message_out[15] ;
737       memset(message_out,'\x0',15);
738       if ( message ) 
739           strncpy( message_out,"Upgrading ",strlen("Upgrading ") );
740       else
741           strncpy( message_out,"Installing ",strlen("Installing ") );
742           char *version = pkg_version_str_alloc(pkg);
743       
744           opkg_message(conf, OPKG_NOTICE,
745                        "%s%s (%s) to %s...\n", message_out,
746                        pkg->name, version, pkg->dest->name);
747           free(version);
748           return 0;
749      }
750 }
751
752 /**
753  *  @brief Really install a pkg_t 
754  */
755 int opkg_install_pkg(opkg_conf_t *conf, pkg_t *pkg, int from_upgrade)
756 {
757      int err = 0;
758      int message = 0;
759      pkg_t *old_pkg = NULL;
760      pkg_vec_t *replacees;
761      abstract_pkg_t *ab_pkg = NULL;
762      int old_state_flag;
763      char* file_md5;
764 #ifdef HAVE_SHA256
765      char* file_sha256;
766 #endif
767
768      if ( from_upgrade ) 
769         message = 1;            /* Coming from an upgrade, and should change the output message */
770
771      if (!pkg) {
772           opkg_message(conf, OPKG_ERROR,
773                        "INTERNAL ERROR: null pkg passed to opkg_install_pkg\n");
774           return OPKG_INSTALL_ERR_INTERNAL;
775      }
776
777      opkg_message(conf, OPKG_DEBUG2, "Function: %s calling pkg_arch_supported %s \n", __FUNCTION__, __FUNCTION__);
778
779      if (!pkg_arch_supported(conf, pkg)) {
780           opkg_message(conf, OPKG_ERROR, "INTERNAL ERROR: architecture %s for pkg %s is unsupported.\n",
781                        pkg->architecture, pkg->name);
782           return OPKG_INSTALL_ERR_INTERNAL;
783      }
784      if (pkg->state_status == SS_INSTALLED && conf->force_reinstall == 0 && conf->nodeps == 0) {
785           err = satisfy_dependencies_for(conf, pkg);
786           if (err) { return OPKG_INSTALL_ERR_DEPENDENCIES; }
787
788           opkg_message(conf, OPKG_NOTICE,
789                        "Package %s is already installed in %s.\n", 
790                        pkg->name, pkg->dest->name);
791           return 0;
792      }
793
794      if (pkg->dest == NULL) {
795           pkg->dest = conf->default_dest;
796      }
797
798      old_pkg = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg->name);
799
800      err = opkg_install_check_downgrade(conf, pkg, old_pkg, message);
801      if (err) { return OPKG_INSTALL_ERR_NO_DOWNGRADE; }
802
803      pkg->state_want = SW_INSTALL;
804      if (old_pkg){                          
805          old_pkg->state_want = SW_DEINSTALL; /* needed for check_data_file_clashes of dependences */
806      }
807
808
809      /* Abhaya: conflicts check */
810      err = check_conflicts_for(conf, pkg);
811      if (err) { return OPKG_INSTALL_ERR_CONFLICTS; }
812     
813      /* this setup is to remove the upgrade scenario in the end when
814         installing pkg A, A deps B & B deps on A. So both B and A are
815         installed. Then A's installation is started resulting in an
816         uncecessary upgrade */ 
817      if (pkg->state_status == SS_INSTALLED
818          && conf->force_reinstall == 0) return 0;
819     
820      err = verify_pkg_installable(conf, pkg);
821      if (err) { return OPKG_INSTALL_ERR_NO_SPACE; }
822
823      if (pkg->local_filename == NULL) {
824           err = opkg_download_pkg(conf, pkg, conf->tmp_dir);
825           if (err) {
826                opkg_message(conf, OPKG_ERROR,
827                             "Failed to download %s. Perhaps you need to run 'opkg update'?\n",
828                             pkg->name);
829                return OPKG_INSTALL_ERR_DOWNLOAD;
830           }
831      }
832
833      /* check that the repository is valid */
834      #if defined(HAVE_GPGME) || defined(HAVE_OPENSSL)
835      char *list_file_name, *sig_file_name, *lists_dir;
836
837      /* check to ensure the package has come from a repository */
838      if (conf->check_signature && pkg->src)
839      {
840        sprintf_alloc (&lists_dir, "%s",
841                      (conf->restrict_to_default_dest)
842                       ? conf->default_dest->lists_dir
843                       : conf->lists_dir);
844        sprintf_alloc (&list_file_name, "%s/%s", lists_dir, pkg->src->name);
845        sprintf_alloc (&sig_file_name, "%s/%s.sig", lists_dir, pkg->src->name);
846
847        if (file_exists (sig_file_name))
848        {
849          if (opkg_verify_file (conf, list_file_name, sig_file_name)){
850            opkg_message(conf, OPKG_ERROR, "Failed to verify the signature of: %s\n",
851                            list_file_name);
852            return OPKG_INSTALL_ERR_SIGNATURE;
853          }
854        }else{
855          opkg_message(conf, OPKG_ERROR, "Signature file is missing. "
856                          "Perhaps you need to run 'opkg update'?\n");
857          return OPKG_INSTALL_ERR_SIGNATURE;
858        }
859
860        free (lists_dir);
861        free (list_file_name);
862        free (sig_file_name);
863      }
864      #endif
865
866      /* Check for md5 values */
867      if (pkg->md5sum)
868      {
869          file_md5 = file_md5sum_alloc(pkg->local_filename);
870          if (file_md5 && strcmp(file_md5, pkg->md5sum))
871          {
872               opkg_message(conf, OPKG_ERROR,
873                            "Package %s md5sum mismatch. Either the opkg or the package index are corrupt. Try 'opkg update'.\n",
874                            pkg->name);
875               free(file_md5);
876               return OPKG_INSTALL_ERR_MD5;
877          }
878          if (file_md5)
879               free(file_md5);
880      }
881
882 #ifdef HAVE_SHA256
883      /* Check for sha256 value */
884      if(pkg->sha256sum)
885      {
886          file_sha256 = file_sha256sum_alloc(pkg->local_filename);
887          if (file_sha256 && strcmp(file_sha256, pkg->sha256sum))
888          {
889               opkg_message(conf, OPKG_ERROR,
890                            "Package %s sha256sum mismatch. Either the opkg or the package index are corrupt. Try 'opkg update'.\n",
891                            pkg->name);
892               free(file_sha256);
893               return OPKG_INSTALL_ERR_SHA256;
894          }
895          if (file_sha256)
896               free(file_sha256);
897      }
898 #endif
899
900      if (pkg->tmp_unpack_dir == NULL) {
901           unpack_pkg_control_files(conf, pkg);
902      }
903
904      /* We should update the filelist here, so that upgrades of packages that split will not fail. -Jamey 27-MAR-03 */
905 /* Pigi: check if it will pass from here when replacing. It seems to fail */
906 /* That's rather strange that files don't change owner. Investigate !!!!!!*/
907      err = update_file_ownership(conf, pkg, old_pkg);
908      if (err) { return OPKG_ERR_UNKNOWN; }
909
910      if (conf->nodeps == 0) {
911           err = satisfy_dependencies_for(conf, pkg);
912           if (err) { return OPKG_INSTALL_ERR_DEPENDENCIES; }
913           if (pkg->state_status == SS_UNPACKED)
914                /* Circular dependency has installed it for us. */
915                return 0;
916      }
917
918      replacees = pkg_vec_alloc();
919      pkg_get_installed_replacees(conf, pkg, replacees);
920
921      /* this next section we do with SIGINT blocked to prevent inconsistency between opkg database and filesystem */
922      {
923           sigset_t newset, oldset;
924           sighandler_t old_handler = NULL;
925           int use_signal = 0;
926           caught_sigint = 0;
927           if (use_signal) {
928                old_handler = signal(SIGINT, opkg_install_pkg_sigint_handler);
929           } else {
930                sigemptyset(&newset);
931                sigaddset(&newset, SIGINT);
932                sigprocmask(SIG_BLOCK, &newset, &oldset);
933           }
934
935           opkg_state_changed++;
936           pkg->state_flag |= SF_FILELIST_CHANGED;
937
938           pkg_remove_orphan_dependent(conf, pkg, old_pkg);
939
940           /* XXX: BUG: we really should treat replacement more like an upgrade
941            *      Instead, we're going to remove the replacees 
942            */
943           err = pkg_remove_installed_replacees(conf, replacees);
944           if (err) goto UNWIND_REMOVE_INSTALLED_REPLACEES;
945
946           err = prerm_upgrade_old_pkg(conf, pkg, old_pkg);
947           if (err) goto UNWIND_PRERM_UPGRADE_OLD_PKG;
948
949           err = prerm_deconfigure_conflictors(conf, pkg, replacees);
950           if (err) goto UNWIND_PRERM_DECONFIGURE_CONFLICTORS;
951
952           err = preinst_configure(conf, pkg, old_pkg);
953           if (err) goto UNWIND_PREINST_CONFIGURE;
954
955           err = backup_modified_conffiles(conf, pkg, old_pkg);
956           if (err) goto UNWIND_BACKUP_MODIFIED_CONFFILES;
957
958           err = check_data_file_clashes(conf, pkg, old_pkg);
959           if (err) goto UNWIND_CHECK_DATA_FILE_CLASHES;
960
961           err = postrm_upgrade_old_pkg(conf, pkg, old_pkg);
962           if (err) goto UNWIND_POSTRM_UPGRADE_OLD_PKG;
963
964           if (conf->noaction) return 0;
965
966           /* point of no return: no unwinding after this */
967           if (old_pkg && !conf->force_reinstall) {
968                old_pkg->state_want = SW_DEINSTALL;
969
970                if (old_pkg->state_flag & SF_NOPRUNE) {
971                     opkg_message(conf, OPKG_INFO,
972                                  "  not removing obsolesced files because package marked noprune\n");
973                } else {
974                     opkg_message(conf, OPKG_INFO,
975                                  "  removing obsolesced files\n");
976                     remove_obsolesced_files(conf, pkg, old_pkg);
977                }
978                /* removing files from old package, to avoid ghost files */ 
979                remove_data_files_and_list(conf, old_pkg);
980 /* Pigi : It should be better to remove also maintainer and postrem scripts here, just in case*/
981                remove_maintainer_scripts_except_postrm(conf, old_pkg);
982                remove_postrm(conf, old_pkg);
983 /* Pigi */
984
985           }
986
987
988           opkg_message(conf, OPKG_INFO,
989                        "  installing maintainer scripts\n");
990           install_maintainer_scripts(conf, pkg, old_pkg);
991
992           /* the following just returns 0 */
993           remove_disappeared(conf, pkg);
994
995           opkg_message(conf, OPKG_INFO,
996                        "  installing data files\n");
997           install_data_files(conf, pkg);
998
999 /* read comments from function for detail but I will execute this here as all other tests are ok.*/
1000           err = check_data_file_clashes_change(conf, pkg, old_pkg);
1001
1002           opkg_message(conf, OPKG_INFO,
1003                        "  resolving conf files\n");
1004           resolve_conffiles(conf, pkg);
1005
1006           pkg->state_status = SS_UNPACKED;
1007           old_state_flag = pkg->state_flag;
1008           pkg->state_flag &= ~SF_PREFER;
1009           opkg_message(conf, OPKG_DEBUG, "   pkg=%s old_state_flag=%x state_flag=%x\n", pkg->name, old_state_flag, pkg->state_flag);
1010
1011           if (old_pkg && !conf->force_reinstall) {
1012                old_pkg->state_status = SS_NOT_INSTALLED;
1013           }
1014
1015           time(&pkg->installed_time);
1016
1017           opkg_message(conf, OPKG_INFO,
1018                        "  cleanup temp files\n");
1019           cleanup_temporary_files(conf, pkg);
1020
1021           ab_pkg = pkg->parent;
1022           if (ab_pkg)
1023                ab_pkg->state_status = pkg->state_status;
1024
1025           opkg_message(conf, OPKG_INFO, "Done.\n");
1026
1027           if (use_signal)
1028                signal(SIGINT, old_handler);
1029           else
1030                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
1031           pkg_vec_free (replacees);
1032           return 0;
1033      
1034
1035      UNWIND_POSTRM_UPGRADE_OLD_PKG:
1036           postrm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1037      UNWIND_CHECK_DATA_FILE_CLASHES:
1038           check_data_file_clashes_unwind(conf, pkg, old_pkg);
1039      UNWIND_BACKUP_MODIFIED_CONFFILES:
1040           backup_modified_conffiles_unwind(conf, pkg, old_pkg);
1041      UNWIND_PREINST_CONFIGURE:
1042           preinst_configure_unwind(conf, pkg, old_pkg);
1043      UNWIND_PRERM_DECONFIGURE_CONFLICTORS:
1044           prerm_deconfigure_conflictors_unwind(conf, pkg, replacees);
1045      UNWIND_PRERM_UPGRADE_OLD_PKG:
1046           prerm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1047      UNWIND_REMOVE_INSTALLED_REPLACEES:
1048           pkg_remove_installed_replacees_unwind(conf, replacees);
1049
1050           opkg_message(conf, OPKG_INFO,
1051                        "  cleanup temp files\n");
1052           cleanup_temporary_files(conf, pkg);
1053
1054           opkg_message(conf, OPKG_INFO,
1055                        "Failed.\n");
1056           if (use_signal)
1057                signal(SIGINT, old_handler);
1058           else
1059                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
1060
1061           pkg_vec_free (replacees);
1062           return OPKG_ERR_UNKNOWN;
1063      }
1064 }
1065
1066 static int prerm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1067 {
1068      /* DPKG_INCOMPATIBILITY:
1069         dpkg does some things here that we don't do yet. Do we care?
1070         
1071         1. If a version of the package is already installed, call
1072            old-prerm upgrade new-version
1073         2. If the script runs but exits with a non-zero exit status
1074            new-prerm failed-upgrade old-version
1075            Error unwind, for both the above cases:
1076            old-postinst abort-upgrade new-version
1077      */
1078      return 0;
1079 }
1080
1081 static int prerm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1082 {
1083      /* DPKG_INCOMPATIBILITY:
1084         dpkg does some things here that we don't do yet. Do we care?
1085         (See prerm_upgrade_old_package for details)
1086      */
1087      return 0;
1088 }
1089
1090 static int prerm_deconfigure_conflictors(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1091 {
1092      /* DPKG_INCOMPATIBILITY:
1093         dpkg does some things here that we don't do yet. Do we care?
1094         2. If a 'conflicting' package is being removed at the same time:
1095                 1. If any packages depended on that conflicting package and
1096                    --auto-deconfigure is specified, call, for each such package:
1097                    deconfigured's-prerm deconfigure \
1098                    in-favour package-being-installed version \
1099                    removing conflicting-package version
1100                 Error unwind:
1101                    deconfigured's-postinst abort-deconfigure \
1102                    in-favour package-being-installed-but-failed version \
1103                    removing conflicting-package version
1104
1105                    The deconfigured packages are marked as requiring
1106                    configuration, so that if --install is used they will be
1107                    configured again if possible.
1108                 2. To prepare for removal of the conflicting package, call:
1109                    conflictor's-prerm remove in-favour package new-version
1110                 Error unwind:
1111                    conflictor's-postinst abort-remove in-favour package new-version
1112      */
1113      return 0;
1114 }
1115
1116 static int prerm_deconfigure_conflictors_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1117 {
1118      /* DPKG_INCOMPATIBILITY: dpkg does some things here that we don't
1119         do yet. Do we care?  (See prerm_deconfigure_conflictors for
1120         details) */
1121      return 0;
1122 }
1123
1124 static int preinst_configure(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1125 {
1126      int err;
1127      char *preinst_args;
1128
1129      if (old_pkg) {
1130           char *old_version = pkg_version_str_alloc(old_pkg);
1131           sprintf_alloc(&preinst_args, "upgrade %s", old_version);
1132           free(old_version);
1133      } else if (pkg->state_status == SS_CONFIG_FILES) {
1134           char *pkg_version = pkg_version_str_alloc(pkg);
1135           sprintf_alloc(&preinst_args, "install %s", pkg_version);
1136           free(pkg_version);
1137      } else {
1138           preinst_args = xstrdup("install");
1139      }
1140
1141      err = pkg_run_script(conf, pkg, "preinst", preinst_args);
1142      if (err) {
1143           opkg_message(conf, OPKG_ERROR,
1144                        "Aborting installation of %s\n", pkg->name);
1145           return 1;
1146      }
1147
1148      free(preinst_args);
1149
1150      return 0;
1151 }
1152
1153 static int preinst_configure_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1154 {
1155      /* DPKG_INCOMPATIBILITY:
1156         dpkg does the following error unwind, should we?
1157         pkg->postrm abort-upgrade old-version
1158         OR pkg->postrm abort-install old-version
1159         OR pkg->postrm abort-install
1160      */
1161      return 0;
1162 }
1163
1164 static int backup_modified_conffiles(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1165 {
1166      int err;
1167      conffile_list_elt_t *iter;
1168      conffile_t *cf;
1169
1170      if (conf->noaction) return 0;
1171
1172      /* Backup all modified conffiles */
1173      if (old_pkg) {
1174           for (iter = nv_pair_list_first(&old_pkg->conffiles); iter; iter = nv_pair_list_next(&old_pkg->conffiles, iter)) {
1175                char *cf_name;
1176                
1177                cf = iter->data;
1178                cf_name = root_filename_alloc(conf, cf->name);
1179
1180                /* Don't worry if the conffile is just plain gone */
1181                if (file_exists(cf_name) && conffile_has_been_modified(conf, cf)) {
1182                     err = backup_make_backup(conf, cf_name);
1183                     if (err) {
1184                          return err;
1185                     }
1186                }
1187                free(cf_name);
1188           }
1189      }
1190
1191      /* Backup all conffiles that were not conffiles in old_pkg */
1192      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1193           char *cf_name;
1194           cf = (conffile_t *)iter->data;
1195           cf_name = root_filename_alloc(conf, cf->name);
1196           /* Ignore if this was a conffile in old_pkg as well */
1197           if (pkg_get_conffile(old_pkg, cf->name)) {
1198                continue;
1199           }
1200
1201           if (file_exists(cf_name) && (! backup_exists_for(cf_name))) {
1202                err = backup_make_backup(conf, cf_name);
1203                if (err) {
1204                     return err;
1205                }
1206           }
1207           free(cf_name);
1208      }
1209
1210      return 0;
1211 }
1212
1213 static int backup_modified_conffiles_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1214 {
1215      conffile_list_elt_t *iter;
1216
1217      if (old_pkg) {
1218           for (iter = nv_pair_list_first(&old_pkg->conffiles); iter; iter = nv_pair_list_next(&old_pkg->conffiles, iter)) {
1219                backup_remove(((nv_pair_t *)iter->data)->name);
1220           }
1221      }
1222
1223      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1224           backup_remove(((nv_pair_t *)iter->data)->name);
1225      }
1226
1227      return 0;
1228 }
1229
1230
1231 static int check_data_file_clashes(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1232 {
1233      /* DPKG_INCOMPATIBILITY:
1234         opkg takes a slightly different approach than dpkg at this
1235         point.  dpkg installs each file in the new package while
1236         creating a backup for any file that is replaced, (so that it
1237         can unwind if necessary).  To avoid complexity and redundant
1238         storage, opkg doesn't do any installation until later, (at the
1239         point at which dpkg removes the backups.
1240         
1241         But, we do have to check for data file clashes, since after
1242         installing a package with a file clash, removing either of the
1243         packages involved in the clash has the potential to break the
1244         other package.
1245      */
1246      str_list_t *files_list;
1247      str_list_elt_t *iter, *niter;
1248
1249      int clashes = 0;
1250
1251      files_list = pkg_get_installed_files(pkg);
1252      for (iter = str_list_first(files_list), niter = str_list_next(files_list, iter); 
1253              iter; 
1254              iter = niter, niter = str_list_next(files_list, iter)) {
1255           char *root_filename;
1256           char *filename = (char *) iter->data;
1257           root_filename = root_filename_alloc(conf, filename);
1258           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1259                pkg_t *owner;
1260                pkg_t *obs;
1261                /* Pre-existing conffiles are OK */
1262                /* @@@@ should have way to check that it is a conffile -Jamey */
1263                if (backup_exists_for(root_filename)) {
1264                     continue;
1265                }
1266
1267                /* Pre-existing files are OK if force-overwrite was asserted. */ 
1268                if (conf->force_overwrite) {
1269                     /* but we need to change who owns this file */
1270                     file_hash_set_file_owner(conf, filename, pkg);
1271                     continue;
1272                }
1273
1274                owner = file_hash_get_file_owner(conf, filename);
1275
1276                /* Pre-existing files are OK if owned by the pkg being upgraded. */
1277                if (owner && old_pkg) {
1278                     if (strcmp(owner->name, old_pkg->name) == 0) {
1279                          continue;
1280                     }
1281                }
1282
1283                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1284                if (owner) {
1285                     opkg_message(conf, OPKG_DEBUG2, "Checking for replaces for %s in package %s\n", filename, owner->name);
1286                     if (pkg_replaces(pkg, owner)) {
1287                          continue;
1288                     }
1289 /* If the file that would be installed is owned by the same package, ( as per a reinstall or similar )
1290    then it's ok to overwrite. */
1291                     if (strcmp(owner->name,pkg->name)==0){
1292                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1293                          continue;
1294                     }
1295                }
1296
1297                /* Pre-existing files are OK if they are obsolete */
1298                obs = hash_table_get(&conf->obs_file_hash, filename);
1299                if (obs) {
1300                     opkg_message(conf, OPKG_INFO, "Pre-exiting file %s is obsolete.  obs_pkg=%s\n", filename, obs->name);
1301                     continue;
1302                }
1303
1304                /* We have found a clash. */
1305                opkg_message(conf, OPKG_ERROR,
1306                             "Package %s wants to install file %s\n"
1307                             "\tBut that file is already provided by package ",
1308                             pkg->name, filename);
1309                if (owner) {
1310                     opkg_message(conf, OPKG_ERROR,
1311                                  "%s\n", owner->name);
1312                } else {
1313                     opkg_message(conf, OPKG_ERROR,
1314                                  "<no package>\nPlease move this file out of the way and try again.\n");
1315                }
1316                clashes++;
1317           }
1318           free(root_filename);
1319      }
1320      pkg_free_installed_files(pkg);
1321
1322      return clashes;
1323 }
1324
1325 static int check_data_file_clashes_change(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1326 {
1327     /* Basically that's the worst hack I could do to be able to change ownership of
1328        file list, but, being that we have no way to unwind the mods, due to structure
1329        of hash table, probably is the quickest hack too, whishing it would not slow-up thing too much.
1330        What we do here is change the ownership of file in hash if a replace ( or similar events
1331        happens )
1332        Only the action that are needed to change name should be considered.
1333        @@@ To change after 1.0 release.
1334      */
1335      str_list_t *files_list;
1336      str_list_elt_t *iter, *niter;
1337
1338      char *root_filename = NULL;
1339
1340      int clashes = 0;
1341
1342      files_list = pkg_get_installed_files(pkg);
1343      for (iter = str_list_first(files_list), niter = str_list_next(files_list, iter); 
1344              iter; 
1345              iter = niter, niter = str_list_next(files_list, niter)) {
1346           char *filename = (char *) iter->data;
1347           if (root_filename) {
1348               free(root_filename);
1349               root_filename = NULL;
1350           }
1351           root_filename = root_filename_alloc(conf, filename);
1352           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1353                pkg_t *owner;
1354
1355                owner = file_hash_get_file_owner(conf, filename);
1356
1357                if (conf->force_overwrite) {
1358                     /* but we need to change who owns this file */
1359                     file_hash_set_file_owner(conf, filename, pkg);
1360                     continue;
1361                }
1362
1363
1364                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1365                if (owner) {
1366                     if (pkg_replaces(pkg, owner)) {
1367 /* It's now time to change the owner of that file. 
1368    It has been "replaced" from the new "Replaces", then I need to inform lists file about that.  */
1369                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1370                          file_hash_set_file_owner(conf, filename, pkg);
1371                          continue;
1372                     }
1373                }
1374
1375           }
1376      }
1377      if (root_filename) {
1378          free(root_filename);
1379          root_filename = NULL;
1380      }
1381      pkg_free_installed_files(pkg);
1382
1383      return clashes;
1384 }
1385
1386 static int check_data_file_clashes_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1387 {
1388      /* Nothing to do since check_data_file_clashes doesn't change state */
1389      return 0;
1390 }
1391
1392 static int postrm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1393 {
1394      /* DPKG_INCOMPATIBILITY: dpkg does the following here, should we?
1395         1. If the package is being upgraded, call
1396            old-postrm upgrade new-version
1397         2. If this fails, attempt:
1398            new-postrm failed-upgrade old-version
1399         Error unwind, for both cases:
1400            old-preinst abort-upgrade new-version    */
1401      return 0;
1402 }
1403
1404 static int postrm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1405 {
1406      /* DPKG_INCOMPATIBILITY:
1407         dpkg does some things here that we don't do yet. Do we care?
1408         (See postrm_upgrade_old_pkg for details)
1409      */
1410     return 0;
1411 }
1412
1413 static int remove_obsolesced_files(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1414 {
1415      int err;
1416      str_list_t *old_files;
1417      str_list_elt_t *of;
1418      str_list_t *new_files;
1419      str_list_elt_t *nf;
1420      hash_table_t new_files_table;
1421
1422      if (old_pkg == NULL) {
1423           return 0;
1424      }
1425
1426      old_files = pkg_get_installed_files(old_pkg);
1427      new_files = pkg_get_installed_files(pkg);
1428
1429      new_files_table.entries = NULL;
1430      hash_table_init("new_files" , &new_files_table, 20);
1431      for (nf = str_list_first(new_files); nf; nf = str_list_next(new_files, nf)) {
1432          if (nf && nf->data)
1433             hash_table_insert(&new_files_table, nf->data, nf->data);
1434      }
1435
1436      for (of = str_list_first(old_files); of; of = str_list_next(old_files, of)) {
1437           pkg_t *owner;
1438           char *old, *new;
1439           old = (char *)of->data;
1440           new = (char *) hash_table_get (&new_files_table, old);
1441           if (new)
1442                continue;
1443
1444           if (file_is_dir(old)) {
1445                continue;
1446           }
1447           owner = file_hash_get_file_owner(conf, old);
1448           if (owner != old_pkg) {
1449                /* in case obsolete file no longer belongs to old_pkg */
1450                continue;
1451           }
1452  
1453           /* old file is obsolete */
1454           opkg_message(conf, OPKG_INFO,
1455                        "    removing obsolete file %s\n", old);
1456           if (!conf->noaction) {
1457                err = unlink(old);
1458                if (err) {
1459                     opkg_message(conf, OPKG_ERROR, "    Warning: remove %s failed: %s\n", old,
1460                                  strerror(errno));
1461                }
1462           }
1463      }
1464
1465      hash_table_deinit(&new_files_table);
1466      pkg_free_installed_files(old_pkg);
1467      pkg_free_installed_files(pkg);
1468
1469      return 0;
1470 }
1471
1472 static int install_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1473 {
1474      int ret;
1475      char *prefix;
1476
1477      sprintf_alloc(&prefix, "%s.", pkg->name);
1478      ret = pkg_extract_control_files_to_dir_with_prefix(pkg,
1479                                                         pkg->dest->info_dir,
1480                                                         prefix);
1481      free(prefix);
1482      return ret;
1483 }
1484
1485 static int remove_disappeared(opkg_conf_t *conf, pkg_t *pkg)
1486 {
1487      /* DPKG_INCOMPATIBILITY:
1488         This is a fairly sophisticated dpkg operation. Shall we
1489         skip it? */
1490      
1491      /* Any packages all of whose files have been overwritten during the
1492         installation, and which aren't required for dependencies, are
1493         considered to have been removed. For each such package
1494         1. disappearer's-postrm disappear overwriter overwriter-version
1495         2. The package's maintainer scripts are removed
1496         3. It is noted in the status database as being in a sane state,
1497            namely not installed (any conffiles it may have are ignored,
1498            rather than being removed by dpkg). Note that disappearing
1499            packages do not have their prerm called, because dpkg doesn't
1500            know in advance that the package is going to vanish.
1501      */
1502      return 0;
1503 }
1504
1505 static int install_data_files(opkg_conf_t *conf, pkg_t *pkg)
1506 {
1507      int err;
1508
1509      /* opkg takes a slightly different approach to data file backups
1510         than dpkg. Rather than removing backups at this point, we
1511         actually do the data file installation now. See comments in
1512         check_data_file_clashes() for more details. */
1513     
1514      opkg_message(conf, OPKG_INFO,
1515                   "    extracting data files to %s\n", pkg->dest->root_dir);
1516      err = pkg_extract_data_files_to_dir(pkg, pkg->dest->root_dir);
1517      if (err) {
1518           return err;
1519      }
1520
1521      /* XXX: BUG or FEATURE : We are actually loosing the Essential flag,
1522         so we can't save ourself from removing important packages
1523         At this point we (should) have extracted the .control file, so it
1524         would be a good idea to reload the data in it, and set the Essential 
1525         state in *pkg. From now on the Essential is back in status file and
1526         we can protect again.
1527         We should operate this way:
1528         fopen the file ( pkg->dest->root_dir/pkg->name.control )
1529         check for "Essential" in it 
1530         set the value in pkg->essential.
1531         This new routine could be useful also for every other flag
1532         Pigi: 16/03/2004 */
1533      set_flags_from_control(conf, pkg) ;
1534      
1535      opkg_message(conf, OPKG_DEBUG, "    Calling pkg_write_filelist from %s\n", __FUNCTION__);
1536      err = pkg_write_filelist(conf, pkg);
1537      if (err)
1538           return err;
1539
1540      /* XXX: FEATURE: opkg should identify any files which existed
1541         before installation and which were overwritten, (see
1542         check_data_file_clashes()). What it must do is remove any such
1543         files from the filelist of the old package which provided the
1544         file. Otherwise, if the old package were removed at some point
1545         it would break the new package. Removing the new package will
1546         also break the old one, but this cannot be helped since the old
1547         package's file has already been deleted. This is the importance
1548         of check_data_file_clashes(), and only allowing opkg to install
1549         a clashing package with a user force. */
1550
1551      return 0;
1552 }
1553
1554 static int resolve_conffiles(opkg_conf_t *conf, pkg_t *pkg)
1555 {
1556      conffile_list_elt_t *iter;
1557      conffile_t *cf;
1558      char *cf_backup;
1559      char *md5sum;
1560
1561      if (conf->noaction) return 0;
1562
1563      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1564           char *root_filename;
1565           cf = (conffile_t *)iter->data;
1566           root_filename = root_filename_alloc(conf, cf->name);
1567
1568           /* Might need to initialize the md5sum for each conffile */
1569           if (cf->value == NULL) {
1570                cf->value = file_md5sum_alloc(root_filename);
1571           }
1572
1573           if (!file_exists(root_filename)) {
1574                free(root_filename);
1575                continue;
1576           }
1577
1578           cf_backup = backup_filename_alloc(root_filename);
1579
1580
1581           if (file_exists(cf_backup)) {
1582               /* Let's compute md5 to test if files are changed */
1583               md5sum = file_md5sum_alloc(cf_backup);
1584               if (md5sum && cf->value && strcmp(cf->value,md5sum) != 0 ) {
1585                   if (conf->force_maintainer) {
1586                       opkg_message(conf, OPKG_NOTICE, "Conffile %s using maintainer's setting.\n", cf_backup);
1587                   } else if (conf->force_defaults
1588                           || user_prefers_old_conffile(cf->name, cf_backup) ) {
1589                       rename(cf_backup, root_filename);
1590                   }
1591               }
1592               unlink(cf_backup);
1593               if (md5sum)
1594                   free(md5sum);
1595           }
1596
1597           free(cf_backup);
1598           free(root_filename);
1599      }
1600
1601      return 0;
1602 }
1603
1604 static int user_prefers_old_conffile(const char *file_name, const char *backup)
1605 {
1606      char *response;
1607      const char *short_file_name;
1608
1609      short_file_name = strrchr(file_name, '/');
1610      if (short_file_name) {
1611           short_file_name++;
1612      } else {
1613           short_file_name = file_name;
1614      }
1615
1616      while (1) {
1617           response = get_user_response("    Configuration file '%s'\n"
1618                                        "    ==> File on system created by you or by a script.\n"
1619                                        "    ==> File also in package provided by package maintainer.\n"
1620                                        "       What would you like to do about it ?  Your options are:\n"
1621                                        "        Y or I  : install the package maintainer's version\n"
1622                                        "        N or O  : keep your currently-installed version\n"
1623                                        "          D     : show the differences between the versions (if diff is installed)\n"
1624                                        "     The default action is to keep your current version.\n"
1625                                        "    *** %s (Y/I/N/O/D) [default=N] ? ", file_name, short_file_name);
1626           if (strcmp(response, "y") == 0
1627               || strcmp(response, "i") == 0
1628               || strcmp(response, "yes") == 0) {
1629                free(response);
1630                return 0;
1631           }
1632
1633           if (strcmp(response, "d") == 0) {
1634                char *cmd;
1635
1636                free(response);
1637                /* XXX: BUG rewrite to use exec or busybox's internal diff */
1638                sprintf_alloc(&cmd, "diff -u %s %s", backup, file_name);
1639                xsystem(cmd);
1640                free(cmd);
1641                printf("    [Press ENTER to continue]\n");
1642                response = file_read_line_alloc(stdin);
1643                free(response);
1644                continue;
1645           }
1646
1647           free(response);
1648           return 1;
1649      }
1650 }
1651
1652 /* XXX: CLEANUP: I'd like to move all of the code for
1653    creating/cleaning pkg->tmp_unpack_dir directly into pkg.c. (Then,
1654    it would make sense to cleanup pkg->tmp_unpack_dir directly from
1655    pkg_deinit for example). */
1656 static int cleanup_temporary_files(opkg_conf_t *conf, pkg_t *pkg)
1657 {
1658      DIR *tmp_dir;
1659      struct dirent *dirent;
1660      char *tmp_file;
1661
1662 #ifdef OPKG_DEBUG_NO_TMP_CLEANUP
1663 #error
1664      opkg_message(conf, OPKG_DEBUG,
1665                   "%s: Not cleaning up %s since opkg compiled with OPKG_DEBUG_NO_TMP_CLEANUP\n",
1666                   __FUNCTION__, pkg->tmp_unpack_dir);
1667      return 0;
1668 #endif
1669
1670      if (pkg->tmp_unpack_dir && file_is_dir(pkg->tmp_unpack_dir)) {
1671           tmp_dir = opendir(pkg->tmp_unpack_dir);
1672           if (tmp_dir) {
1673                while (1) {
1674                     dirent = readdir(tmp_dir);
1675                     if (dirent == NULL) {
1676                          break;
1677                     }
1678                     sprintf_alloc(&tmp_file, "%s/%s",
1679                                   pkg->tmp_unpack_dir, dirent->d_name);
1680                     if (! file_is_dir(tmp_file)) {
1681                          unlink(tmp_file);
1682                     }
1683                     free(tmp_file);
1684                }
1685                closedir(tmp_dir);
1686                rmdir(pkg->tmp_unpack_dir);
1687                free(pkg->tmp_unpack_dir);
1688                pkg->tmp_unpack_dir = NULL;
1689           }
1690      }
1691
1692      opkg_message(conf, OPKG_INFO, "cleanup_temporary_files: pkg=%s local_filename=%s tmp_dir=%s\n",
1693                   pkg->name, pkg->local_filename, conf->tmp_dir);
1694      if (pkg->local_filename && strncmp(pkg->local_filename, conf->tmp_dir, strlen(conf->tmp_dir)) == 0) {
1695           unlink(pkg->local_filename);
1696           free(pkg->local_filename);
1697           pkg->local_filename = NULL;
1698      }
1699
1700      return 0;
1701 }
1702
1703 static char *backup_filename_alloc(const char *file_name)
1704 {
1705      char *backup;
1706
1707      sprintf_alloc(&backup, "%s%s", file_name, OPKG_BACKUP_SUFFIX);
1708
1709      return backup;
1710 }
1711
1712 int backup_make_backup(opkg_conf_t *conf, const char *file_name)
1713 {
1714      int err;
1715      char *backup;
1716     
1717      backup = backup_filename_alloc(file_name);
1718      err = file_copy(file_name, backup);
1719      if (err) {
1720           opkg_message(conf, OPKG_ERROR,
1721                        "%s: Failed to copy %s to %s\n",
1722                        __FUNCTION__, file_name, backup);
1723      }
1724
1725      free(backup);
1726
1727      return err;
1728 }
1729
1730 static int backup_exists_for(const char *file_name)
1731 {
1732      int ret;
1733      char *backup;
1734
1735      backup = backup_filename_alloc(file_name);
1736
1737      ret = file_exists(backup);
1738
1739      free(backup);
1740
1741      return ret;
1742 }
1743
1744 static int backup_remove(const char *file_name)
1745 {
1746      char *backup;
1747
1748      backup = backup_filename_alloc(file_name);
1749      unlink(backup);
1750      free(backup);
1751
1752      return 0;
1753 }
1754