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
  11 #include "cpp-common/vendor/fmt/format.h"
  12
  13 #include "file.hpp"
  14
  15 void ctf_fs_file_destroy(struct ctf_fs_file *file)
  16 {
  17     if (!file) {
  18         return;
  19     }
  20
  21     if (file->fp) {
  22         BT_CPPLOGD_SPEC(file->logger, "Closing file \"{}\" ({})",
  23                         file->path ? file->path->str : NULL, fmt::ptr(file->fp));
  24
  25         if (fclose(file->fp)) {
  26             BT_CPPLOGE_SPEC(file->logger, "Cannot close file \"{}\": {}",
  27                             file->path ? file->path->str : "NULL", strerror(errno));
  28         }
  29     }
  30
  31     if (file->path) {
  32         g_string_free(file->path, TRUE);
  33     }
  34
  35     delete file;
  36 }
  37
  38 void ctf_fs_file_deleter::operator()(ctf_fs_file * const file) noexcept
  39 {
  40     ctf_fs_file_destroy(file);
  41 }
  42
  43 ctf_fs_file::UP ctf_fs_file_create(const bt2c::Logger& parentLogger)
  44 {
  45     ctf_fs_file::UP file {new ctf_fs_file {parentLogger}};
  46
  47     file->path = g_string_new(NULL);
  48     if (!file->path) {
  49         goto error;
  50     }
  51
  52     goto end;
  53
  54 error:
  55     file.reset();
  56
  57 end:
  58     return file;
  59 }
  60
  61 int ctf_fs_file_open(struct ctf_fs_file *file, const char *mode)
  62 {
  63     int ret = 0;
  64     struct stat stat;
  65
  66     BT_CPPLOGI_SPEC(file->logger, "Opening file \"{}\" with mode \"{}\"", file->path->str, mode);
  67     file->fp = fopen(file->path->str, mode);
  68     if (!file->fp) {
  69         BT_CPPLOGE_ERRNO_APPEND_CAUSE_SPEC(file->logger, "Cannot open file", ": path={}, mode={}",
  70                                            file->path->str, mode);
  71         goto error;
  72     }
  73
  74     BT_CPPLOGI_SPEC(file->logger, "Opened file: {}", fmt::ptr(file->fp));
  75
  76     if (fstat(fileno(file->fp), &stat)) {
  77         BT_CPPLOGE_ERRNO_APPEND_CAUSE_SPEC(file->logger, "Cannot get file information", ": path={}",
  78                                            file->path->str);
  79         goto error;
  80     }
  81
  82     file->size = stat.st_size;
  83     BT_CPPLOGI_SPEC(file->logger, "File is {} bytes", (intmax_t) file->size);
  84     goto end;
  85
  86 error:
  87     ret = -1;
  88
  89     if (file->fp) {
  90         if (fclose(file->fp)) {
  91             BT_CPPLOGE_SPEC(file->logger, "Cannot close file \"{}\": {}", file->path->str,
  92                             strerror(errno));
  93         }
  94     }
  95
  96 end:
  97     return ret;
  98 }