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