ipkg_conf.c

来自「this is the pkg installer for linux」· C语言 代码 · 共 718 行 · 第 1/2 页

		    hash_entry_t *e = &hash->entries[j];
		    if (e->next)
			 n_conflicts++;
		    while (e && e->key) {
			 len++;
			 e = e->next;
		    }
		    if (len > c) 
			 c = len;
	       }
	       ipkg_message(conf, IPKG_DEBUG, "hash_table[%s] n_buckets=%d n_elements=%d max_conflicts=%d n_conflicts=%d\n", 
			    hash->name, hash->n_entries, hash->n_elements, c, n_conflicts);
	       hash_table_deinit(hash);
	  }
     }
}

static int ipkg_conf_set_default_dest(ipkg_conf_t *conf,
				      const char *default_dest_name)
{
     pkg_dest_list_elt_t *iter;
     pkg_dest_t *dest;

     for (iter = conf->pkg_dest_list.head; iter; iter = iter->next) {
	  dest = iter->data;
	  if (strcmp(dest->name, default_dest_name) == 0) {
	       conf->default_dest = dest;
	       conf->restrict_to_default_dest = 1;
	       return 0;
	  }
     }

     fprintf(stderr, "ERROR: Unknown dest name: `%s'\n", default_dest_name);

     return 1;
}

static int set_and_load_pkg_src_list(ipkg_conf_t *conf, pkg_src_list_t *pkg_src_list)
{
     pkg_src_list_elt_t *iter;
     pkg_src_t *src;
     char *list_file;

     for (iter = pkg_src_list->head; iter; iter = iter->next) {
          src = iter->data;
	  if (src == NULL) {
	       continue;
	  }

	  sprintf_alloc(&list_file, "%s/%s", 
			  conf->restrict_to_default_dest ? conf->default_dest->lists_dir : conf->lists_dir, 
			  src->name);

	  if (file_exists(list_file)) {
	       pkg_hash_add_from_file(conf, list_file, src, NULL, 0);
	  }
	  free(list_file);
     }

     return 0;
}

static int set_and_load_pkg_dest_list(ipkg_conf_t *conf, nv_pair_list_t *nv_pair_list, char *lists_dir )
{
     nv_pair_list_elt_t *iter;
     nv_pair_t *nv_pair;
     pkg_dest_t *dest;
     char *root_dir;

     for (iter = nv_pair_list->head; iter; iter = iter->next) {
	  nv_pair = iter->data;

	  if (conf->offline_root) {
	       sprintf_alloc(&root_dir, "%s%s", conf->offline_root, nv_pair->value);
	  } else {
	       root_dir = strdup(nv_pair->value);
	  }
	  dest = pkg_dest_list_append(&conf->pkg_dest_list, nv_pair->name, root_dir, lists_dir);
	  free(root_dir);
	  if (dest == NULL) {
	       continue;
	  }
	  if (conf->default_dest == NULL) {
	       conf->default_dest = dest;
	  }
	  if (file_exists(dest->status_file_name)) {
	       pkg_hash_add_from_file(conf, dest->status_file_name,
				      NULL, dest, 1);
	  }
     }

     return 0;
}

static int ipkg_conf_parse_file(ipkg_conf_t *conf, const char *filename,
				pkg_src_list_t *pkg_src_list,
				nv_pair_list_t *tmp_dest_nv_pair_list,
				char **lists_dir)
{
     int err;
     ipkg_option_t * options;
     FILE *file = fopen(filename, "r");
     regex_t valid_line_re, comment_re;
#define regmatch_size 12
     regmatch_t regmatch[regmatch_size];

     if (ipkg_init_options_array(conf, &options)<0)
        return ENOMEM;

     if (file == NULL) {
	  fprintf(stderr, "%s: failed to open %s: %s\n",
		  __FUNCTION__, filename, strerror(errno));
	  free(options);
	  return errno;
     }
     ipkg_message(conf, IPKG_NOTICE, "loading conf file %s\n", filename);

     err = xregcomp(&comment_re, 
		    "^[[:space:]]*(#.*|[[:space:]]*)$",
		    REG_EXTENDED);
     if (err) {
	  free(options);
	  return err;
     }
     err = xregcomp(&valid_line_re, "^[[:space:]]*(\"([^\"]*)\"|([^[:space:]]*))[[:space:]]*(\"([^\"]*)\"|([^[:space:]]*))[[:space:]]*(\"([^\"]*)\"|([^[:space:]]*))([[:space:]]+([^[:space:]]+))?[[:space:]]*$", REG_EXTENDED);
     if (err) {
	  free(options);
	  return err;
     }

     while(1) {
	  int line_num = 0;
	  char *line;
	  char *type, *name, *value, *extra;

	  line = file_read_line_alloc(file);
	  line_num++;
	  if (line == NULL) {
	       break;
	  }

	  str_chomp(line);

	  if (regexec(&comment_re, line, 0, 0, 0) == 0) {
	       goto NEXT_LINE;
	  }

	  if (regexec(&valid_line_re, line, regmatch_size, regmatch, 0) == REG_NOMATCH) {
	       str_chomp(line);
	       fprintf(stderr, "%s:%d: Ignoring invalid line: `%s'\n",
		       filename, line_num, line);
	       goto NEXT_LINE;
	  }

	  /* This has to be so ugly to deal with optional quotation marks */
	  if (regmatch[2].rm_so > 0) {
	       type = strndup(line + regmatch[2].rm_so,
			      regmatch[2].rm_eo - regmatch[2].rm_so);
	  } else {
	       type = strndup(line + regmatch[3].rm_so,
			      regmatch[3].rm_eo - regmatch[3].rm_so);
	  }
	  if (regmatch[5].rm_so > 0) {
	       name = strndup(line + regmatch[5].rm_so,
			      regmatch[5].rm_eo - regmatch[5].rm_so);
	  } else {
	       name = strndup(line + regmatch[6].rm_so,
			      regmatch[6].rm_eo - regmatch[6].rm_so);
	  }
	  if (regmatch[8].rm_so > 0) {
	       value = strndup(line + regmatch[8].rm_so,
			       regmatch[8].rm_eo - regmatch[8].rm_so);
	  } else {
	       value = strndup(line + regmatch[9].rm_so,
			       regmatch[9].rm_eo - regmatch[9].rm_so);
	  }
	  extra = NULL;
	  if (regmatch[11].rm_so > 0) {
	       extra = strndup (line + regmatch[11].rm_so,
				regmatch[11].rm_eo - regmatch[11].rm_so);
	  }

	  /* We use the tmp_dest_nv_pair_list below instead of
	     conf->pkg_dest_list because we might encounter an
	     offline_root option later and that would invalidate the
	     directories we would have computed in
	     pkg_dest_list_init. (We do a similar thing with
	     tmp_src_nv_pair_list for sake of symmetry.) */
	  if (strcmp(type, "option") == 0) {
	       ipkg_conf_set_option(options, name, value);
	  } else if (strcmp(type, "src") == 0) {
	       if (!nv_pair_list_find(pkg_src_list, name)) {
		    pkg_src_list_append (pkg_src_list, name, value, extra, 0);
	       } else {
		    ipkg_message(conf, IPKG_ERROR, "ERROR: duplicate src declaration.  Skipping:\n\t src %s %s\n",
				 name, value);
	       }
	  } else if (strcmp(type, "src/gz") == 0) {
	       if (!nv_pair_list_find(pkg_src_list, name)) {
		    pkg_src_list_append (pkg_src_list, name, value, extra, 1);
	       } else {
		    ipkg_message(conf, IPKG_ERROR, "ERROR: duplicate src declaration.  Skipping:\n\t src %s %s\n",
				 name, value);
	       }
	  } else if (strcmp(type, "dest") == 0) {
	       nv_pair_list_append(tmp_dest_nv_pair_list, name, value);
	  } else if (strcmp(type, "lists_dir") == 0) {
	       *lists_dir = realloc(*lists_dir,strlen(value)+1);
               if (*lists_dir == NULL) {
		    ipkg_message(conf, IPKG_ERROR, "ERROR: Not enough memory\n");
	            free(options);
	            return EINVAL;
               }
               sprintf (*lists_dir,"%s",value);
	  } else if (strcmp(type, "arch") == 0) {
	       ipkg_message(conf, IPKG_INFO, "supported arch %s priority (%s)\n", name, value);
	       if (!value) {
		    ipkg_message(conf, IPKG_NOTICE, "defaulting architecture %s priority to 10\n", name);
		    value = strdup("10");
	       }
	       nv_pair_list_append(&conf->arch_list, strdup(name), strdup(value));
	  } else {
	       fprintf(stderr, "WARNING: Ignoring unknown configuration "
		       "parameter: %s %s %s\n", type, name, value);
	       free(options);
	       return EINVAL;
	  }

	  free(type);
	  free(name);
	  free(value);
	  if (extra)
	       free (extra);

     NEXT_LINE:
	  free(line);
     }

     free(options);
     regfree(&comment_re);
     regfree(&valid_line_re);
     fclose(file);

     return 0;
}

static int ipkg_conf_set_option(const ipkg_option_t *options,
				const char *name, const char *value)
{
     int i = 0;
     while (options[i].name) {
	  if (strcmp(options[i].name, name) == 0) {
	       switch (options[i].type) {
	       case IPKG_OPT_TYPE_BOOL:
		    *((int *)options[i].value) = 1;
		    return 0;
	       case IPKG_OPT_TYPE_INT:
		    if (value) {
			 *((int *)options[i].value) = atoi(value);
			 return 0;
		    } else {
			 printf("%s: Option %s need an argument\n",
				__FUNCTION__, name);
			 return EINVAL;
		    }		    
	       case IPKG_OPT_TYPE_STRING:
		    if (value) {
			 *((char **)options[i].value) = strdup(value);
			 return 0;
		    } else {
			 printf("%s: Option %s need an argument\n",
				__FUNCTION__, name);
			 return EINVAL;
		    }
	       }
	  }
	  i++;
     }
    
     fprintf(stderr, "%s: Unrecognized option: %s=%s\n",
	     __FUNCTION__, name, value);
     return EINVAL;
}

int ipkg_conf_write_status_files(ipkg_conf_t *conf)
{
     pkg_dest_list_elt_t *iter;
     pkg_dest_t *dest;
     pkg_vec_t *all;
     pkg_t *pkg;
     register int i;
     int err;

     if (conf->noaction)
	  return 0;
     for (iter = conf->pkg_dest_list.head; iter; iter = iter->next) {
	  dest = iter->data;
	  dest->status_file = fopen(dest->status_file_tmp_name, "w");
	  if (dest->status_file == NULL) {
	       fprintf(stderr, "%s: Can't open status file: %s for writing: %s\n",
		       __FUNCTION__, dest->status_file_name, strerror(errno));
	  }
     }

     all = pkg_vec_alloc();
     pkg_hash_fetch_available(&conf->pkg_hash, all);

     for(i = 0; i < all->len; i++) {
	  pkg = all->pkgs[i];
	  /* We don't need most uninstalled packages in the status file */
	  if (pkg->state_status == SS_NOT_INSTALLED
	      && (pkg->state_want == SW_UNKNOWN
		  || pkg->state_want == SW_DEINSTALL
		  || pkg->state_want == SW_PURGE)) {
	       continue;
	  }
	  if (!pkg) {
	    fprintf(stderr, "Null package\n");
	  }
	  if (pkg->dest == NULL) {
	       fprintf(stderr, "%s: ERROR: Can't write status for "
		       "package %s since it has a NULL dest\n",
		       __FUNCTION__, pkg->name);
	       continue;
	  }
	  if (pkg->dest->status_file) {
	       pkg_print_status(pkg, pkg->dest->status_file);
	  }
     }

     pkg_vec_free(all);

     for (iter = conf->pkg_dest_list.head; iter; iter = iter->next) {
	  dest = iter->data;
	  if (dest->status_file) {
	       err = ferror(dest->status_file);
	       fclose(dest->status_file);
	       dest->status_file = NULL;
	       if (!err) {
		    file_move(dest->status_file_tmp_name, dest->status_file_name);
	       } else {
		    fprintf(stderr, "%s: ERROR: An error has occurred writing %s, "
			    "retaining old %s\n", __FUNCTION__, 
			    dest->status_file_tmp_name, dest->status_file_name);
	       }
	  }
     }

     return 0;
}


char *root_filename_alloc(ipkg_conf_t *conf, char *filename)
{
     char *root_filename;
     sprintf_alloc(&root_filename, "%s%s", (conf->offline_root ? conf->offline_root : ""), filename);
     return root_filename;
}