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