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

   1 /*
   2  * SPDX-License-Identifier: MIT
   3  *
   4  * Copyright 2016 Philippe Proulx <pproulx@efficios.com>
   5  */
   6
   7 #define BT_COMP_LOG_SELF_COMP (file->self_comp)
   8 #define BT_LOG_OUTPUT_LEVEL   (file->log_level)
   9 #define BT_LOG_TAG            "PLUGIN/SRC.CTF.FS/FILE"
  10 #include "logging/comp-logging.h"
  11
  12 #include <stdio.h>
  13 #include <sys/types.h>
  14 #include <sys/stat.h>
  15 #include <unistd.h>
  16 #include <glib.h>
  17 #include "file.hpp"
  18
  19 BT_HIDDEN
  20 void ctf_fs_file_destroy(struct ctf_fs_file *file)
  21 {
  22     if (!file) {
  23         return;
  24     }
  25
  26     if (file->fp) {
  27         BT_COMP_LOGD("Closing file \"%s\" (%p)", file->path ? file->path->str : NULL, file->fp);
  28
  29         if (fclose(file->fp)) {
  30             BT_COMP_LOGE("Cannot close file \"%s\": %s", file->path ? file->path->str : "NULL",
  31                          strerror(errno));
  32         }
  33     }
  34
  35     if (file->path) {
  36         g_string_free(file->path, TRUE);
  37     }
  38
  39     g_free(file);
  40 }
  41
  42 BT_HIDDEN
  43 struct ctf_fs_file *ctf_fs_file_create(bt_logging_level log_level, bt_self_component *self_comp)
  44 {
  45     struct ctf_fs_file *file = g_new0(struct ctf_fs_file, 1);
  46
  47     if (!file) {
  48         goto error;
  49     }
  50
  51     file->log_level = log_level;
  52     file->self_comp = self_comp;
  53     file->path = g_string_new(NULL);
  54     if (!file->path) {
  55         goto error;
  56     }
  57
  58     goto end;
  59
  60 error:
  61     ctf_fs_file_destroy(file);
  62     file = NULL;
  63
  64 end:
  65     return file;
  66 }
  67
  68 BT_HIDDEN
  69 int ctf_fs_file_open(struct ctf_fs_file *file, const char *mode)
  70 {
  71     int ret = 0;
  72     struct stat stat;
  73
  74     BT_COMP_LOGI("Opening file \"%s\" with mode \"%s\"", file->path->str, mode);
  75     file->fp = fopen(file->path->str, mode);
  76     if (!file->fp) {
  77         BT_COMP_LOGE_APPEND_CAUSE_ERRNO(file->self_comp, "Cannot open file", ": path=%s, mode=%s",
  78                                         file->path->str, mode);
  79         goto error;
  80     }
  81
  82     BT_COMP_LOGI("Opened file: %p", file->fp);
  83
  84     if (fstat(fileno(file->fp), &stat)) {
  85         BT_COMP_LOGE_APPEND_CAUSE_ERRNO(file->self_comp, "Cannot get file information", ": path=%s",
  86                                         file->path->str);
  87         goto error;
  88     }
  89
  90     file->size = stat.st_size;
  91     BT_COMP_LOGI("File is %jd bytes", (intmax_t) file->size);
  92     goto end;
  93
  94 error:
  95     ret = -1;
  96
  97     if (file->fp) {
  98         if (fclose(file->fp)) {
  99             BT_COMP_LOGE("Cannot close file \"%s\": %s", file->path->str, strerror(errno));
 100         }
 101     }
 102
 103 end:
 104     return ret;
 105 }