Hi,
I'm using vpopmaild in my qmail installation to automate some
operations. Unfortunately some time vpopmaild after some command remains
to use all CPU TIME as long as I kill vpopmaild process:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
30689 root 20 0 1012 1012 768 R 97.1 0.1 3:20.21 vpopmaild
http://www.mail-archive.com/vchkpw@inter7.com/msg25601.html
We believe that the problem could be here, in wait_read() function:
original vpopmaild.c, line 247 ~, in :
if (select(2,&rfds,(fd_set *) 0,(fd_set *)0,&tv)>=1) {
fgets(ReadBuf,sizeof(ReadBuf),stdin);
return(1);
replacing
"fgets(ReadBuf,sizeof(ReadBuf),stdin);"
with
"if(fgets(ReadBuf,sizeof(ReadBuf),stdin) != NULL)"
the problem disappears.
The problem is caused by the fact that if you close the socket
client-side execution is trapped in an infinite loop that calls
wait_read and that fgets returns NULL, because the socket is closed.
From "fgets()"
[...]
If the End-of-File is encountered and no characters have been read, the
contents of str remain unchanged and a null pointer is returned. If an
error occurs, a null pointer is returned.
[...]
Thanks to Davide Gelardi for this information.
!DSPAM:4ccd29d732711172621150!
