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9term: fix getpts on linux

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Openpty uses grantpt internally and its behavior is
unspecified when a handler is set to catch SIGCHLD.

Fixes issue 37. http://code.swtch.com/plan9port/issues/37

R=rsc
CC=codebot
http://codereview.appspot.com/1209049
This commit is contained in:
Anthony Martin 2010-06-28 14:32:29 -07:00 committed by Russ Cox
parent 670f730113
commit c988c8adf1
2 changed files with 6 additions and 0 deletions
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1
CONTRIBUTORS
View file

@ -5,6 +5,7 @@
Albert Lee <trisk@acm.jhu.edu>
André Günther <Andre.G@gmx.de>
Anthony Martin <ality@pbrane.org>
Anthony Sorace <a@9srv.net>
Arvindh Rajesh Tamilmani <art@a-30.net>
Benjamin Huntsman <BHuntsman@mail2.cu-portland.edu>

5
src/cmd/9term/Linux.c
View file

@ -1,13 +1,18 @@
#define getpts not_using_this_getpts
#include "bsdpty.c"
#undef getpts
#include <signal.h>
int
getpts(int fd[], char *slave)
{
void (*f)(int);
f = signal(SIGCHLD, SIG_DFL);
if(openpty(&fd[1], &fd[0], NULL, NULL, NULL) >= 0){
fchmod(fd[1], 0620);
strcpy(slave, ttyname(fd[0]));
signal(SIGCHLD, f);
return 0;
}
sysfatal("no ptys");