/[rdesktop]/jpeg/rdesktop/trunk/disk.c
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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revision 783 by stargo, Fri Oct 15 18:02:45 2004 UTC revision 785 by astrand, Thu Oct 21 08:10:04 2004 UTC
# Line 132  convert_1970_to_filetime(uint32 high, ui Line 132  convert_1970_to_filetime(uint32 high, ui
132    
133  }  }
134    
135    /* A wrapper for ftruncate which supports growing files, even if the
136       native ftruncate doesn't. This is needed on Linux FAT filesystems,
137       for example. */
138    static int
139    ftruncate_growable(int fd, off_t length)
140    {
141            int ret;
142            off_t pos;
143            static const char zero;
144    
145            /* Try the simple method first */
146            if ((ret = ftruncate(fd, length)) != -1)
147            {
148                    return ret;
149            }
150    
151            /*
152             * Some kind of error. Perhaps we were trying to grow. Retry
153             * in a safe way.
154             */
155    
156            /* Get current position */
157            if ((pos = lseek(fd, 0, SEEK_CUR)) == -1)
158            {
159                    perror("lseek");
160                    return -1;
161            }
162    
163            /* Seek to new size */
164            if (lseek(fd, length, SEEK_SET) == -1)
165            {
166                    perror("lseek");
167                    return -1;
168            }
169    
170            /* Write a zero */
171            if (write(fd, &zero, 1) == -1)
172            {
173                    perror("write");
174                    return -1;
175            }
176    
177            /* Truncate. This shouldn't fail. */
178            if (ftruncate(fd, length) == -1)
179            {
180                    perror("ftruncate");
181                    return -1;
182            }
183    
184            /* Restore position */
185            if (lseek(fd, pos, SEEK_SET) == -1)
186            {
187                    perror("lseek");
188                    return -1;
189            }
190    
191            return 0;
192    }
193    
194    
195  /* Enumeration of devices from rdesktop.c        */  /* Enumeration of devices from rdesktop.c        */
196  /* returns numer of units found and initialized. */  /* returns numer of units found and initialized. */
# Line 658  disk_set_information(NTHANDLE handle, ui Line 717  disk_set_information(NTHANDLE handle, ui
717                                  if (stat_fs.f_bsize * stat_fs.f_bfree < length)                                  if (stat_fs.f_bsize * stat_fs.f_bfree < length)
718                                          return STATUS_DISK_FULL;                                          return STATUS_DISK_FULL;
719    
720                          /* FIXME: Growing file with ftruncate doesn't                          if (ftruncate_growable(handle, length) != 0)
                            work with Linux FAT fs */  
                         if (ftruncate(handle, length) != 0)  
721                          {                          {
                                 perror("ftruncate");  
722                                  return STATUS_DISK_FULL;                                  return STATUS_DISK_FULL;
723                          }                          }
724    
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