Date: Wed, 07 Oct 1998 22:30:47 -0700 From: Mike Smith <mike@smith.net.au> To: Darren Whittaker <djw@sage1.sagecorp.com> Cc: freebsd-current@FreeBSD.ORG Subject: Re: problem in 3.0 Message-ID: <199810080530.WAA01135@dingo.cdrom.com> In-Reply-To: Your message of "Wed, 07 Oct 1998 16:03:13 MDT." <Pine.SOL.3.93.981007155510.26034A-100000@sage1.sagecorp.com>
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> We have found a problem with popen. The first popen is executed just fine
> with a good pclose. The second popen appears to work (though nothing
> happens) and the pclose returns a 138. This also applies to the system
> call. The first one works but any after sustem call after the first
> one fails. We even forked the process but in the child only the first
> popen work.
I'm not sure that I can follow your problem here. Have you reduced the
program to its simplest form, eg:
dingo:/tmp>cat p.c
#include <stdio.h>
#include <err.h>
void main(void)
{
int i, j;
char buf[256];
FILE *p;
for (i = 0; i < 10; i++) {
if ((p = popen("/bin/date", "r")) == NULL)
err(1, "popen");
fgets(buf, sizeof(buf) - 1, p);
printf(buf);
if ((j = pclose(p)) != 0)
errx(1, "pclose %d", j);
}
}
dingo:/tmp>gcc -o p p.c
dingo:/tmp>./p
Wed Oct 7 22:28:04 PDT 1998
Wed Oct 7 22:28:04 PDT 1998
Wed Oct 7 22:28:04 PDT 1998
Wed Oct 7 22:28:04 PDT 1998
Wed Oct 7 22:28:04 PDT 1998
Wed Oct 7 22:28:04 PDT 1998
Wed Oct 7 22:28:04 PDT 1998
Wed Oct 7 22:28:04 PDT 1998
Wed Oct 7 22:28:04 PDT 1998
Wed Oct 7 22:28:04 PDT 1998
dingo:/tmp>uname -a
FreeBSD dingo.cdrom.com 3.0-CURRENT FreeBSD 3.0-CURRENT #2: Wed Sep 16 16:38:28 PDT 1998 mike@dingo.cdrom.com:/local0/src/sys/compile/DINGO i386
What do you mean by "this also applies to the system call"? Which
system call?
> Now our program is running as a cgi under Apache and works on your 2.x
> versions just fine.
I'm afraid you're going to have to supply some more detail before we
can help you further here.
--
\\ Sometimes you're ahead, \\ Mike Smith
\\ sometimes you're behind. \\ mike@smith.net.au
\\ The race is long, and in the \\ msmith@freebsd.org
\\ end it's only with yourself. \\ msmith@cdrom.com
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