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remove unsupported call to fseek when file is opened with popen

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This commit is contained in:
Jonathan Lafontaine 2018-10-30 16:47:06 -04:00
parent b8ff18f37f
commit 610a882f1d
1 changed files with 28 additions and 16 deletions
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44
winpr/libwinpr/timezone/timezone.c
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@ -2032,31 +2032,43 @@ static UINT64 winpr_windows_gmtime()
static char* winpr_read_unix_timezone_identifier_from_file(FILE* fp)
{
INT64 length;
char* tzid = NULL;
const INT CHUNK_SIZE = 32;
INT64 rc, read = 0, length = CHUNK_SIZE;
char* tmp, *tzid = NULL;
if (_fseeki64(fp, 0, SEEK_END) != 0)
return NULL;
length = _ftelli64(fp);
if (_fseeki64(fp, 0, SEEK_SET) != 0)
return NULL;
if (length < 2)
return NULL;
tzid = (char*) malloc(length + 1);
tzid = (char*) malloc(length);
if (!tzid)
return NULL;
if (fread(tzid, length, 1, fp) != 1)
do
{
rc = fread(tzid + read, 1, length - read - 1, fp);
read += rc;
if(read < (length - 1))
break;
length += CHUNK_SIZE;
tmp = (char*) realloc(tzid, length);
if(!tmp)
{
free(tzid);
return NULL;
}
tzid = tmp;
}
while(rc > 0);
if (ferror(fp))
{
free(tzid);
return NULL;
}
tzid[length] = '\0';
if (tzid[length - 1] == '\n')
tzid[length - 1] = '\0';
tzid[read] = '\0';
if (tzid[read - 1] == '\n')
tzid[read - 1] = '\0';
return tzid;
}