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