src/lib/lttng-ctl/filter/filter-visitor-ir-normalize-glob-patterns.c

   1 /*
   2  * filter-visitor-ir-normalize-glob-patterns.c
   3  *
   4  * LTTng filter IR normalize string
   5  *
   6  * Copyright 2017 - Philippe Proulx <pproulx@efficios.com>
   7  *
   8  * This library is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU Lesser General Public License, version 2.1 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public License
  18  * along with this library; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include <stdio.h>
  23 #include <unistd.h>
  24 #include <string.h>
  25 #include <stdlib.h>
  26 #include <assert.h>
  27 #include <errno.h>
  28 #include <inttypes.h>
  29
  30 #include <common/macros.h>
  31 #include <common/string-utils/string-utils.h>
  32
  33 #include "filter-ast.h"
  34 #include "filter-parser.h"
  35 #include "filter-ir.h"
  36
  37 static
  38 int normalize_glob_patterns(struct ir_op *node)
  39 {
  40         switch (node->op) {
  41         case IR_OP_UNKNOWN:
  42         default:
  43                 fprintf(stderr, "[error] %s: unknown op type\n", __func__);
  44                 return -EINVAL;
  45
  46         case IR_OP_ROOT:
  47                 return normalize_glob_patterns(node->u.root.child);
  48         case IR_OP_LOAD:
  49         {
  50                 if (node->data_type == IR_DATA_STRING) {
  51                         enum ir_load_string_type type =
  52                                 node->u.load.u.string.type;
  53                         if (type == IR_LOAD_STRING_TYPE_GLOB_STAR_END ||
  54                                         type == IR_LOAD_STRING_TYPE_GLOB_STAR) {
  55                                 assert(node->u.load.u.string.value);
  56                                 strutils_normalize_star_glob_pattern(
  57                                         node->u.load.u.string.value);
  58                         }
  59                 }
  60
  61                 return 0;
  62         }
  63         case IR_OP_UNARY:
  64                 return normalize_glob_patterns(node->u.unary.child);
  65         case IR_OP_BINARY:
  66         {
  67                 int ret = normalize_glob_patterns(node->u.binary.left);
  68
  69                 if (ret)
  70                         return ret;
  71                 return normalize_glob_patterns(node->u.binary.right);
  72         }
  73         case IR_OP_LOGICAL:
  74         {
  75                 int ret;
  76
  77                 ret = normalize_glob_patterns(node->u.logical.left);
  78                 if (ret)
  79                         return ret;
  80                 return normalize_glob_patterns(node->u.logical.right);
  81         }
  82         }
  83 }
  84
  85 /*
  86  * This function normalizes all the globbing literal strings with
  87  * utils_normalize_glob_pattern(). See the documentation of
  88  * utils_normalize_glob_pattern() for more details.
  89  */
  90 LTTNG_HIDDEN
  91 int filter_visitor_ir_normalize_glob_patterns(struct filter_parser_ctx *ctx)
  92 {
  93         return normalize_glob_patterns(ctx->ir_root);
  94 }