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2004-09-17 Paul Jakma <paul@dishone.st>

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* vtysh.c: (vtysh_client_execute) trailling NULLs can be arbitrarily
         split across reads, dont get confused by this and block forever.
This commit is contained in:
paul 2004-09-17 06:52:16 +00:00
parent 90f0c88123
commit 2852de1c90
2 changed files with 30 additions and 10 deletions
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5
vtysh/ChangeLog
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@ -1,3 +1,8 @@
2004-09-17 Paul Jakma <paul@dishone.st>
* vtysh.c: (vtysh_client_execute) trailling NULLs can be arbitrarily
split across reads, dont get confused by this and block forever.
2004-09-13 Paul Jakma <paul@dishone.st>
* Makefile.am: extract.pl isnt in srcdir, it's always in the builddir.

35
vtysh/vtysh.c
View File

@ -160,7 +160,8 @@ vtysh_client_execute (struct vtysh_client *vclient, char *line, FILE *fp)
int ret;
char buf[1001];
int nbytes;
int i;
int i;
int numnulls = 0;
if (vclient->fd < 0)
return CMD_SUCCESS;
@ -187,16 +188,30 @@ vtysh_client_execute (struct vtysh_client *vclient, char *line, FILE *fp)
buf[nbytes] = '\0';
fprintf (fp, "%s", buf);
fflush (fp);
/* check for trailling \0\0\0\0, even if split across reads */
if (nbytes >= 4)
{
i = nbytes-4;
numnulls = 0;
}
else
i = 0;
while (i < nbytes)
{
if (buf[i++] == '\0')
numnulls++;
else
{
numnulls = 0;
break;
}
}
if (nbytes >= 4)
{
i = nbytes - 4;
if (buf[i] == '\0' && buf[i + 1] == '\0' && buf[i + 2] == '\0')
{
ret = buf[i + 3];
break;
}
}
/* got 3 or more trailling nulls? */
if (numnulls >= 3)
return CMD_SUCCESS;
}
}
return ret;