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Patch #443899: Check modes on files before performing operations. 

Use IOErrors where file objects use them.
This commit is contained in:
Martin v. Löwis 2002-03-11 06:46:52 +00:00
parent c7f4541260
commit db04489953
1 changed files with 9 additions and 1 deletions
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10
Lib/gzip.py
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@ -61,7 +61,7 @@ def __init__(self, filename=None, mode=None,
zlib.DEF_MEM_LEVEL, zlib.DEF_MEM_LEVEL,
0) 0)
else: else:
raise ValueError, "Mode " + mode + " not supported" raise IOError, "Mode " + mode + " not supported"
self.fileobj = fileobj self.fileobj = fileobj
self.offset = 0 self.offset = 0
@ -133,6 +133,10 @@ def _read_gzip_header(self):
def write(self,data): def write(self,data):
if self.mode != WRITE:
import errno
raise IOError(errno.EBADF, "write() on read-only GzipFile object")
if self.fileobj is None: if self.fileobj is None:
raise ValueError, "write() on closed GzipFile object" raise ValueError, "write() on closed GzipFile object"
if len(data) > 0: if len(data) > 0:
@ -142,6 +146,10 @@ def write(self,data):
self.offset += len(data) self.offset += len(data)
def read(self, size=-1): def read(self, size=-1):
if self.mode != READ:
import errno
raise IOError(errno.EBADF, "write() on read-only GzipFile object")
if self.extrasize <= 0 and self.fileobj is None: if self.extrasize <= 0 and self.fileobj is None:
return '' return ''