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Avoid core dump in resizestring() on read() with 0 bytes.

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This commit is contained in:
Guido van Rossum 1996-06-11 18:38:48 +00:00
parent 65af28a0f4
commit 8bac546e11
1 changed files with 5 additions and 4 deletions
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9
Modules/posixmodule.c
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@ -1408,7 +1408,7 @@ posix_read(self, args)
object *self; object *self;
object *args; object *args;
{ {
int fd, size; int fd, size, n;
object *buffer; object *buffer;
if (!getargs(args, "(ii)", &fd, &size)) if (!getargs(args, "(ii)", &fd, &size))
return NULL; return NULL;
@ -1416,13 +1416,14 @@ posix_read(self, args)
if (buffer == NULL) if (buffer == NULL)
return NULL; return NULL;
BGN_SAVE BGN_SAVE
size = read(fd, getstringvalue(buffer), size); n = read(fd, getstringvalue(buffer), size);
END_SAVE END_SAVE
if (size < 0) { if (n < 0) {
DECREF(buffer); DECREF(buffer);
return posix_error(); return posix_error();
} }
resizestring(&buffer, size); if (n != size)
resizestring(&buffer, n);
return buffer; return buffer;
} }