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_LOG_OUTPUT_LEVEL (file->log_level)
  24 #define BT_LOG_TAG "PLUGIN/SRC.CTF.FS/FILE"
  25 #include "logging/log.h"
  26
  27 #include <stdio.h>
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30 #include <unistd.h>
  31 #include <glib.h>
  32 #include "file.h"
  33
  34 BT_HIDDEN
  35 void ctf_fs_file_destroy(struct ctf_fs_file *file)
  36 {
  37         if (!file) {
  38                 return;
  39         }
  40
  41         if (file->fp) {
  42                 BT_LOGD("Closing file \"%s\" (%p)",
  43                                 file->path ? file->path->str : NULL, file->fp);
  44
  45                 if (fclose(file->fp)) {
  46                         BT_LOGE("Cannot close file \"%s\": %s",
  47                                         file->path ? file->path->str : "NULL",
  48                                         strerror(errno));
  49                 }
  50         }
  51
  52         if (file->path) {
  53                 g_string_free(file->path, TRUE);
  54         }
  55
  56         g_free(file);
  57 }
  58
  59 BT_HIDDEN
  60 struct ctf_fs_file *ctf_fs_file_create(bt_logging_level log_level)
  61 {
  62         struct ctf_fs_file *file = g_new0(struct ctf_fs_file, 1);
  63
  64         if (!file) {
  65                 goto error;
  66         }
  67
  68         file->log_level = log_level;
  69         file->path = g_string_new(NULL);
  70         if (!file->path) {
  71                 goto error;
  72         }
  73
  74         goto end;
  75
  76 error:
  77         ctf_fs_file_destroy(file);
  78         file = NULL;
  79
  80 end:
  81         return file;
  82 }
  83
  84 BT_HIDDEN
  85 int ctf_fs_file_open(struct ctf_fs_file *file, const char *mode)
  86 {
  87         int ret = 0;
  88         struct stat stat;
  89
  90         BT_LOGI("Opening file \"%s\" with mode \"%s\"", file->path->str, mode);
  91         file->fp = fopen(file->path->str, mode);
  92         if (!file->fp) {
  93                 BT_LOGE("Cannot open file \"%s\" with mode \"%s\": %s",
  94                         file->path->str, mode, strerror(errno));
  95                 goto error;
  96         }
  97
  98         BT_LOGI("Opened file: %p", file->fp);
  99
 100         if (fstat(fileno(file->fp), &stat)) {
 101                 BT_LOGE("Cannot get file information: %s", strerror(errno));
 102                 goto error;
 103         }
 104
 105         file->size = stat.st_size;
 106         BT_LOGI("File is %jd bytes", (intmax_t) file->size);
 107         goto end;
 108
 109 error:
 110         ret = -1;
 111
 112         if (file->fp) {
 113                 if (fclose(file->fp)) {
 114                         BT_LOGE("Cannot close file \"%s\": %s", file->path->str,
 115                                 strerror(errno));
 116                 }
 117         }
 118
 119 end:
 120         return ret;
 121 }