Zsh Mailing List Archive
Messages sorted by:
Reverse Date,
Date,
Thread,
Author
Re: more problems w/ irix
- X-seq: zsh-workers 2406
- From: Peter Stephenson <pws@xxxxxx>
- To: Ray Jones <rjones@xxxxxxx>, zsh-workers@xxxxxxxxxxxxxxx (Zsh hackers list)
- Subject: Re: more problems w/ irix
- Date: Thu, 14 Nov 1996 11:01:54 +0100
- In-reply-to: "Ray Jones"'s message of "Wed, 13 Nov 1996 10:23:08 MET." <9611131723.AA14148@dbank>
Ray Jones wrote:
> i applied pws's patch, and it fixed the fdtable problems for the cases
> that i was seeing a crash before.
>
> to test it further and see how it responds when given more files than
> OPEN_MAX, i tried the "cat < * > /dev/null" in a directory w/ about
> 4000 files (OPEN_MAX is 2500). now i'm getting a crash in halloc(),
> or (if i turn enable zsh_mem) malloc().
I have a horrible feeling all that OPEN_MAX stuff was actually
irrelevant... struct multio can only hold MAXREDIRECT redirections,
normally 16; trying <* where there are more than 16 expanded files
simply isn't supposed to work. I've added the test and now it won't
work. I've documented this.
If <muffled but entirely audible whimper> anyone wants to remove the
limit, it would be possible to make the fds member a pointer, and
enlarge it as necessary. I have little enthusiasm. It's a rather
inefficient way of processing a lot of files anyway.
*** Doc/zshmisc.man.mfd Sat Aug 31 15:24:25 1996
--- Doc/zshmisc.man Thu Nov 14 10:58:24 1996
***************
*** 423,429 ****
assuming there's at least one.
(Without the
.B MULTIOS
! option, it would create an empty file called "*".)
.PP
If the user tries to open a file descriptor for reading more than once,
the shell opens the file descriptor as a pipe to a process that copies
--- 423,431 ----
assuming there's at least one.
(Without the
.B MULTIOS
! option, it would create an empty file called "*".) Note that the
! number of multiple redirections is restricted to 16 for a particular
! file descriptor.
.PP
If the user tries to open a file descriptor for reading more than once,
the shell opens the file descriptor as a pipe to a process that copies
*** Src/exec.c.mfd Thu Nov 14 10:42:14 1996
--- Src/exec.c Thu Nov 14 10:44:28 1996
***************
*** 1047,1054 ****
mfds[fd1]->pipe = pipes[1 - rflag];
redup(pipes[rflag], fd1);
mfds[fd1]->ct = 2;
! } else /* add another fd to an already split stream */
mfds[fd1]->fds[mfds[fd1]->ct++] = movefd(fd2);
}
if (subsh_close >= 0 && !fdtable[subsh_close])
subsh_close = -1;
--- 1047,1057 ----
mfds[fd1]->pipe = pipes[1 - rflag];
redup(pipes[rflag], fd1);
mfds[fd1]->ct = 2;
! } else if (mfds[fd1]->ct < MAXREDIRECT) {
! /* add another fd to an already split stream */
mfds[fd1]->fds[mfds[fd1]->ct++] = movefd(fd2);
+ } else /* run out of space in struct multio */
+ close(fd2);
}
if (subsh_close >= 0 && !fdtable[subsh_close])
subsh_close = -1;
--
Peter Stephenson <pws@xxxxxx> Tel: +49 33762 77366
WWW: http://www.ifh.de/~pws/ Fax: +49 33762 77413
Deutches Electronen-Synchrotron --- Institut fuer Hochenergiephysik Zeuthen
DESY-IfH, 15735 Zeuthen, Germany.
Messages sorted by:
Reverse Date,
Date,
Thread,
Author