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Remove all the "assert(len>0)" which forbade zero-length writes across the

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from_backend() interface, after having made all implementations safe against
being called with len==0 and possibly-NULL/undefined "data".

(This includes making misc.c:bufchain_add() more robust in this area.)

Assertion was originally added 2002-03-01; e.g., see plink.c:1.53 [r1571].

I believe this now shouldn't break anything.

This should hopefully make `ppk-empty-comment' finally GO AWAY. (Tested
with Unix PuTTY.)

[originally from svn r3500]
[r1571 == fdbd697801]
This commit is contained in:
Jacob Nevins
2003-10-12 13:16:39 +00:00
parent 5415873b3f
commit 8e2fd15bd5
6 changed files with 8 additions and 14 deletions
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7
scp.c
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@ -178,14 +178,13 @@ int from_backend(void *frontend, int is_stderr, const char *data, int datalen)
unsigned char *p = (unsigned char *) data;
unsigned len = (unsigned) datalen;
assert(len > 0);
/*
* stderr data is just spouted to local stderr and otherwise
* ignored.
*/
if (is_stderr) {
fwrite(data, 1, len, stderr);
if (len > 0)
fwrite(data, 1, len, stderr);
return 0;
}
@ -195,7 +194,7 @@ int from_backend(void *frontend, int is_stderr, const char *data, int datalen)
if (!outptr)
return 0;
if (outlen > 0) {
if ((outlen > 0) && (len > 0)) {
unsigned used = outlen;
if (used > len)
used = len;