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
  29 #define PRINT_ERR_STREAM        ctf_fs->error_fp
  30 #define PRINT_PREFIX            "ctf-fs-file"
  31 #include "print.h"
  32
  33 #include "file.h"
  34
  35 BT_HIDDEN
  36 void ctf_fs_file_destroy(struct ctf_fs_file *file)
  37 {
  38         struct ctf_fs_component *ctf_fs;;
  39
  40         if (!file) {
  41                 return;
  42         }
  43
  44         ctf_fs = file->ctf_fs;
  45
  46         if (file->fp) {
  47                 PDBG("Closing file \"%s\" (%p)\n", file->path->str, file->fp);
  48
  49                 if (fclose(file->fp)) {
  50                         PERR("Cannot close file \"%s\": %s\n", file->path->str,
  51                                 strerror(errno));
  52                 }
  53         }
  54
  55         if (file->path) {
  56                 g_string_free(file->path, TRUE);
  57         }
  58
  59         g_free(file);
  60 }
  61
  62 BT_HIDDEN
  63 struct ctf_fs_file *ctf_fs_file_create(struct ctf_fs_component *ctf_fs)
  64 {
  65         struct ctf_fs_file *file = g_new0(struct ctf_fs_file, 1);
  66
  67         if (!file) {
  68                 goto error;
  69         }
  70
  71         file->ctf_fs = ctf_fs;
  72         file->path = g_string_new(NULL);
  73         if (!file->path) {
  74                 goto error;
  75         }
  76
  77         goto end;
  78
  79 error:
  80         ctf_fs_file_destroy(file);
  81         file = NULL;
  82
  83 end:
  84         return file;
  85 }
  86
  87 BT_HIDDEN
  88 int ctf_fs_file_open(struct ctf_fs_component *ctf_fs, struct ctf_fs_file *file,
  89                 const char *mode)
  90 {
  91         int ret = 0;
  92         struct stat stat;
  93
  94         PDBG("Opening file \"%s\" with mode \"%s\"\n", file->path->str, mode);
  95         file->fp = fopen(file->path->str, mode);
  96         if (!file->fp) {
  97                 PERR("Cannot open file \"%s\" with mode \"%s\": %s\n",
  98                         file->path->str, mode, strerror(errno));
  99                 goto error;
 100         }
 101
 102         PDBG("Opened file: %p\n", file->fp);
 103
 104         if (fstat(fileno(file->fp), &stat)) {
 105                 PERR("Cannot get file informations: %s\n", strerror(errno));
 106                 goto error;
 107         }
 108
 109         file->size = stat.st_size;
 110         PDBG("  File is %zu bytes\n", file->size);
 111         goto end;
 112
 113 error:
 114         ret = -1;
 115
 116         if (file->fp) {
 117                 if (fclose(file->fp)) {
 118                         PERR("Cannot close file \"%s\": %s\n", file->path->str,
 119                                 strerror(errno));
 120                 }
 121         }
 122
 123 end:
 124         return ret;
 125 }