Re: fatal flaw zsh 4.0.1 on irix 6.3 & 6.5: suspend "ls -l|less" then resume hangs

[Timothy Miller <tsm@xxxxxxxxxxxx>]

On Tue, 10 Jul 2001 16:27:00 -0700, "Bart Schaefer" <schaefer@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
> On Jul 10,  5:26pm, Timothy Miller wrote:
> > 
> > Ok: zsh-3_1_6-pws-2 works; zsh-3_1_6-pws-3 fails.
> 
> One of these must be the culprit, then:
> 
> 	* Sven: 7605: Src/exec.c, Src/jobs.c: use killpg instead of
> 	  altering process group when leader exits, fix fg test to use
> 	  killpg.
> 
> 	* Sven: 7573: Src/signals.c, Src/exec.c, Src/utils.c: fix return
> 	  value of killjb(); pipelines which lose their leader get a new
> 	  one.
> 
> Can you send us some output of `ps' that shows the process groups of the
> processes involved, from both -pws-2 and anything after that?

Output is that of "ps -fljt ttyq4" with irrelevant (preexisting) processes
on that tty removed; zsh started as "./Src/zsh +Z -f".

-pws-2:
Initial prompt:
  F S      UID   PID  PPID  PGID   SID  C PRI NI  P    SZ:RSS      WCHAN    STIME TTY     TIME CMD
 b0 S      tsm  9487  1092  9487  1092  0  28 20  *   564:164   8039df60 14:46:22 ttyq4   0:00 ./Src/zsh +Z -f 

while "ls -lR /|cat" is running:
  F S      UID   PID  PPID  PGID   SID  C PRI NI  P    SZ:RSS      WCHAN    STIME TTY     TIME CMD
 b0 R      tsm  9489  9487  9489  1092 15  67 20  *   394:94           - 14:47:03 ttyq4   0:00 ls -lR / 
 b0 S      tsm  9487  1092  9487  1092  0  39 20  *   582:193   8039d510 14:46:22 ttyq4   0:00 ./Src/zsh +Z -f 
 b0 S      tsm  9490  9487  9489  1092  0  60 20  *    45:25    c04cd91c 14:47:03 ttyq4   0:00 cat 

after ^Z:
  F S      UID   PID  PPID  PGID   SID  C PRI NI  P    SZ:RSS      WCHAN    STIME TTY     TIME CMD
 b0 T      tsm  9489  9487  9489  1092  0  60 20  *   394:94           - 14:47:03 ttyq4   0:01 ls -lR / 
 b0 S      tsm  9487  1092  9487  1092  0  28 20  *   582:196   8039df60 14:46:22 ttyq4   0:00 ./Src/zsh +Z -f 
 b0 S      tsm  9490  9487  9489  1092  0  60 20  *    45:25    c04cd91c 14:47:03 ttyq4   0:00 cat 

after fg:
  F S      UID   PID  PPID  PGID   SID  C PRI NI  P    SZ:RSS      WCHAN    STIME TTY     TIME CMD
 b0 S      tsm  9489  9487  9489  1092  7  63 20  *   394:94    c27ae1d8 14:47:03 ttyq4   0:01 ls -lR / 
 b0 S      tsm  9487  1092  9487  1092  0  39 20  *   582:211   8039d510 14:46:22 ttyq4   0:00 ./Src/zsh +Z -f 
 b0 S      tsm  9490  9487  9489  1092  0  60 20  *    45:25    c04cd91c 14:47:03 ttyq4   0:00 cat 

********

-pws-3:
initial prompt:
  F S      UID   PID  PPID  PGID   SID  C PRI NI  P    SZ:RSS      WCHAN    STIME TTY     TIME CMD
 b0 S      tsm 13718  1092 13718  1092  0  28 20  *   563:163   8039df60 14:55:38 ttyq4   0:00 ./Src/zsh +Z -f 

while "ls -lR /|cat" is running:
  F S      UID   PID  PPID  PGID   SID  C PRI NI  P    SZ:RSS      WCHAN    STIME TTY     TIME CMD
 b0 R      tsm 13720 13718 13720  1092 29  74 20  *   394:94           - 14:56:08 ttyq4   0:00 ls -lR / 
 b0 S      tsm 13721 13718 13721  1092  0  60 20  *    45:25    c0c5131c 14:56:08 ttyq4   0:00 cat 
 b0 S      tsm 13718  1092 13718  1092  0  39 20  *   581:191   8039d510 14:55:38 ttyq4   0:00 ./Src/zsh +Z -f 

after ^Z:
  F S      UID   PID  PPID  PGID   SID  C PRI NI  P    SZ:RSS      WCHAN    STIME TTY     TIME CMD
 b0 S      tsm 13720 13718 13720  1092  0  60 20  *   394:94    c0c51320 14:56:08 ttyq4   0:01 ls -lR / 
 b0 T      tsm 13721 13718 13721  1092  0  60 20  *    45:25           - 14:56:08 ttyq4   0:00 cat 
 b0 S      tsm 13718  1092 13718  1092  0  39 20  *   581:192   8039d510 14:55:38 ttyq4   0:00 ./Src/zsh +Z -f 

This version of zsh has different behavior than the current one, it turns
out now I see it interactively: it just hangs uninterruptibly (except by
SIGKILL) after the ^Z, with no prompt and no additional printout of any
kind. My expect script was supposed to have caught that and flagged it as a
problem; I'm not sure what happened there.
   Tim