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 #include <glib.h>
   8 #include <stdio.h>
   9 #include <sys/stat.h>
  10 #include <sys/types.h>
  11 #include <unistd.h>
  12
  13 #define BT_COMP_LOG_SELF_COMP (file->self_comp)
  14 #define BT_LOG_OUTPUT_LEVEL   (file->log_level)
  15 #define BT_LOG_TAG            "PLUGIN/SRC.CTF.FS/FILE"
  16 #include "logging/comp-logging.h"
  17
  18 #include "file.hpp"
  19
  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 struct ctf_fs_file *ctf_fs_file_create(bt_logging_level log_level, bt_self_component *self_comp)
  43 {
  44     struct ctf_fs_file *file = g_new0(struct ctf_fs_file, 1);
  45
  46     if (!file) {
  47         goto error;
  48     }
  49
  50     file->log_level = log_level;
  51     file->self_comp = self_comp;
  52     file->path = g_string_new(NULL);
  53     if (!file->path) {
  54         goto error;
  55     }
  56
  57     goto end;
  58
  59 error:
  60     ctf_fs_file_destroy(file);
  61     file = NULL;
  62
  63 end:
  64     return file;
  65 }
  66
  67 int ctf_fs_file_open(struct ctf_fs_file *file, const char *mode)
  68 {
  69     int ret = 0;
  70     struct stat stat;
  71
  72     BT_COMP_LOGI("Opening file \"%s\" with mode \"%s\"", file->path->str, mode);
  73     file->fp = fopen(file->path->str, mode);
  74     if (!file->fp) {
  75         BT_COMP_LOGE_APPEND_CAUSE_ERRNO(file->self_comp, "Cannot open file", ": path=%s, mode=%s",
  76                                         file->path->str, mode);
  77         goto error;
  78     }
  79
  80     BT_COMP_LOGI("Opened file: %p", file->fp);
  81
  82     if (fstat(fileno(file->fp), &stat)) {
  83         BT_COMP_LOGE_APPEND_CAUSE_ERRNO(file->self_comp, "Cannot get file information", ": path=%s",
  84                                         file->path->str);
  85         goto error;
  86     }
  87
  88     file->size = stat.st_size;
  89     BT_COMP_LOGI("File is %jd bytes", (intmax_t) file->size);
  90     goto end;
  91
  92 error:
  93     ret = -1;
  94
  95     if (file->fp) {
  96         if (fclose(file->fp)) {
  97             BT_COMP_LOGE("Cannot close file \"%s\": %s", file->path->str, strerror(errno));
  98         }
  99     }
 100
 101 end:
 102     return ret;
 103 }