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. */ |
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 |
|
|