src/plugins/ctf/fs-src/file.c

   1 /*
   2  * Copyright 2016 - Philippe Proulx <pproulx@efficios.com>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a copy
   5  * of this software and associated documentation files (the "Software"), to deal
   6  * in the Software without restriction, including without limitation the rights
   7  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   8  * copies of the Software, and to permit persons to whom the Software is
   9  * furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  17  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  19  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  20  * SOFTWARE.
  21  */
  22
  23 #define BT_COMP_LOG_SELF_COMP (file->self_comp)
  24 #define BT_LOG_OUTPUT_LEVEL (file->log_level)
  25 #define BT_LOG_TAG "PLUGIN/SRC.CTF.FS/FILE"
  26 #include "logging/comp-logging.h"
  27
  28 #include <stdio.h>
  29 #include <sys/types.h>
  30 #include <sys/stat.h>
  31 #include <unistd.h>
  32 #include <glib.h>
  33 #include "file.h"
  34
  35 BT_HIDDEN
  36 void ctf_fs_file_destroy(struct ctf_fs_file *file)
  37 {
  38         if (!file) {
  39                 return;
  40         }
  41
  42         if (file->fp) {
  43                 BT_COMP_LOGD("Closing file \"%s\" (%p)",
  44                                 file->path ? file->path->str : NULL, file->fp);
  45
  46                 if (fclose(file->fp)) {
  47                         BT_COMP_LOGE("Cannot close file \"%s\": %s",
  48                                         file->path ? file->path->str : "NULL",
  49                                         strerror(errno));
  50                 }
  51         }
  52
  53         if (file->path) {
  54                 g_string_free(file->path, TRUE);
  55         }
  56
  57         g_free(file);
  58 }
  59
  60 BT_HIDDEN
  61 struct ctf_fs_file *ctf_fs_file_create(bt_logging_level log_level,
  62                 bt_self_component *self_comp)
  63 {
  64         struct ctf_fs_file *file = g_new0(struct ctf_fs_file, 1);
  65
  66         if (!file) {
  67                 goto error;
  68         }
  69
  70         file->log_level = log_level;
  71         file->self_comp = self_comp;
  72         file->path = g_string_new(NULL);
  73         if (!file->path) {
  74                 goto error;
  75         }
  76
  77         goto end;
  78
  79 error:
  80         ctf_fs_file_destroy(file);
  81         file = NULL;
  82
  83 end:
  84         return file;
  85 }
  86
  87 BT_HIDDEN
  88 int ctf_fs_file_open(struct ctf_fs_file *file, const char *mode)
  89 {
  90         int ret = 0;
  91         struct stat stat;
  92
  93         BT_COMP_LOGI("Opening file \"%s\" with mode \"%s\"", file->path->str, mode);
  94         file->fp = fopen(file->path->str, mode);
  95         if (!file->fp) {
  96                 BT_COMP_LOGE_APPEND_CAUSE_ERRNO(file->self_comp,
  97                         "Cannot open file", ": path=%s, mode=%s",
  98                         file->path->str, mode);
  99                 goto error;
 100         }
 101
 102         BT_COMP_LOGI("Opened file: %p", file->fp);
 103
 104         if (fstat(fileno(file->fp), &stat)) {
 105                 BT_COMP_LOGE_APPEND_CAUSE_ERRNO(file->self_comp,
 106                         "Cannot get file information",
 107                         ": path=%s", file->path->str);
 108                 goto error;
 109         }
 110
 111         file->size = stat.st_size;
 112         BT_COMP_LOGI("File is %jd bytes", (intmax_t) file->size);
 113         goto end;
 114
 115 error:
 116         ret = -1;
 117
 118         if (file->fp) {
 119                 if (fclose(file->fp)) {
 120                         BT_COMP_LOGE("Cannot close file \"%s\": %s", file->path->str,
 121                                 strerror(errno));
 122                 }
 123         }
 124
 125 end:
 126         return ret;
 127 }