reverted have*fork.c to erik's unlimited allocation to work better together with werc posts - 9base - revived minimalist port of Plan 9 userland to Unix
HTML git clone git://git.suckless.org/9base
DIR Log
DIR Files
DIR Refs
DIR README
DIR LICENSE
---
DIR commit 0ad0bc437baae7672db4a3975d5b8c716202939c
DIR parent 38702511c5203e487776932e6ebdb1c0a9e80a67
HTML Author: Anselm R Garbe <anselm@garbe.us>
Date: Wed, 5 Jan 2011 08:33:42 +0000
reverted have*fork.c to erik's unlimited allocation to work better together with werc posts
Diffstat:
M config.mk | 2 +-
M rc/havefork.c | 72 +++++++++++++------------------
M rc/haventfork.c | 38 +++++++++++++++++++++++--------
3 files changed, 59 insertions(+), 53 deletions(-)
---
DIR diff --git a/config.mk b/config.mk
@@ -4,7 +4,7 @@
PREFIX = /usr/local/plan9
MANPREFIX = ${PREFIX}/share/man
-VERSION = 6
+VERSION = 7
OBJTYPE = 386
#OBJTYPE = arm
#OBJTYPE = x86_64
DIR diff --git a/rc/havefork.c b/rc/havefork.c
@@ -1,9 +1,3 @@
-#include <u.h>
-#include <signal.h>
-#if defined(PLAN9PORT) && defined(__sun__)
-# define BSD_COMP /* sigh. for TIOCNOTTY */
-#endif
-#include <sys/ioctl.h>
#include "rc.h"
#include "getflags.h"
#include "exec.h"
@@ -16,7 +10,6 @@ void
Xasync(void)
{
int null = open("/dev/null", 0);
- int tty;
int pid;
char npid[10];
if(null<0){
@@ -30,33 +23,7 @@ Xasync(void)
break;
case 0:
clearwaitpids();
- /*
- * I don't know what the right thing to do here is,
- * so this is all experimentally determined.
- * If we just dup /dev/null onto 0, then running
- * ssh foo & will reopen /dev/tty, try to read a password,
- * get a signal, and repeat, in a tight loop, forever.
- * Arguably this is a bug in ssh (it behaves the same
- * way under bash as under rc) but I'm fixing it here
- * anyway. If we dissociate the process from the tty,
- * then it won't be able to open /dev/tty ever again.
- * The SIG_IGN on SIGTTOU makes writing the tty
- * (via fd 1 or 2, for example) succeed even though
- * our pgrp is not the terminal's controlling pgrp.
- */
- if((tty = open("/dev/tty", OREAD)) >= 0){
- /*
- * Should make reads of tty fail, writes succeed.
- */
- signal(SIGTTIN, SIG_IGN);
- signal(SIGTTOU, SIG_IGN);
- ioctl(tty, TIOCNOTTY);
- close(tty);
- }
- if(isatty(0))
- pushredir(ROPEN, null, 0);
- else
- close(null);
+ pushredir(ROPEN, null, 0);
start(runq->code, runq->pc+1, runq->local);
runq->ret = 0;
break;
@@ -104,21 +71,31 @@ Xpipe(void)
}
}
+char*
+erealloc(char *p, long n)
+{
+ p = realloc(p, n); /* botch, should be Realloc */
+ if(p==0)
+ panic("Can't realloc %d bytes\n", n);
+ return p;
+}
+
/*
* Who should wait for the exit from the fork?
*/
+enum { Stralloc = 100, };
+
void
Xbackq(void)
{
- char wd[8193];
- int c;
- char *s, *ewd=&wd[8192], *stop;
+ int c, l, pid;
+ int pfd[2];
+ char *s, *wd, *ewd, *stop;
struct io *f;
var *ifs = vlook("ifs");
word *v, *nextv;
- int pfd[2];
- int pid;
- stop = ifs->val?ifs->val->word:"";
+
+ stop = ifs->val? ifs->val->word: "";
if(pipe(pfd)<0){
Xerror("can't make pipe");
return;
@@ -139,10 +116,16 @@ Xbackq(void)
addwaitpid(pid);
close(pfd[PWR]);
f = openfd(pfd[PRD]);
- s = wd;
+ s = wd = ewd = 0;
v = 0;
while((c = rchr(f))!=EOF){
- if(strchr(stop, c) || s==ewd){
+ if(s==ewd){
+ l = s-wd;
+ wd = erealloc(wd, l+Stralloc);
+ ewd = wd+l+Stralloc-1;
+ s = wd+l;
+ }
+ if(strchr(stop, c)){
if(s!=wd){
*s='\0';
v = newword(wd, v);
@@ -155,6 +138,8 @@ Xbackq(void)
*s='\0';
v = newword(wd, v);
}
+ if(wd)
+ efree(wd);
closeio(f);
Waitfor(pid, 0);
/* v points to reversed arglist -- reverse it onto argv */
@@ -254,4 +239,4 @@ execforkexec(void)
}
addwaitpid(pid);
return pid;
-}
+}
+\ No newline at end of file
DIR diff --git a/rc/haventfork.c b/rc/haventfork.c
@@ -51,12 +51,23 @@ Xasync(void)
setvar("apid", newword(buf, (word *)0));
}
+char*
+erealloc(char *p, long n)
+{
+ p = realloc(p, n); /* botch, should be Realloc */
+ if(p==0)
+ panic("Can't realloc %d bytes\n", n);
+ return p;
+}
+
+enum { Stralloc = 100, };
+
void
Xbackq(void)
{
- char wd[8193], **argv;
- int c;
- char *s, *ewd=&wd[8192], *stop;
+ char **argv;
+ int c, l;
+ char *s, *wd, *ewd, *stop;
struct io *f;
var *ifs = vlook("ifs");
word *v, *nextv;
@@ -84,14 +95,20 @@ Xbackq(void)
}
f = openfd(pfd[0]);
- s = wd;
+ s = wd = ewd = 0;
v = 0;
while((c=rchr(f))!=EOF){
- if(strchr(stop, c) || s==ewd){
+ if(s==ewd){
+ l = s-wd;
+ wd = erealloc(wd, l+Stralloc);
+ ewd = wd+l+Stralloc-1;
+ s = wd+l;
+ }
+ if(strchr(stop, c)){
if(s!=wd){
*s='\0';
- v=newword(wd, v);
- s=wd;
+ v = newword(wd, v);
+ s = wd;
}
}
else *s++=c;
@@ -100,6 +117,8 @@ Xbackq(void)
*s='\0';
v=newword(wd, v);
}
+ if(wd)
+ efree(wd);
closeio(f);
Waitfor(pid, 1);
/* v points to reversed arglist -- reverse it onto argv */
@@ -190,7 +209,7 @@ execforkexec(void)
for(path = searchpath(runq->argv->words->word);path;path = path->next){
nc = strlen(path->word);
- if(nc<sizeof(file)){
+ if(nc < sizeof file - 1){ /* 1 for / */
strcpy(file, path->word);
if(file[0]){
strcat(file, "/");
@@ -208,4 +227,4 @@ execforkexec(void)
}
free(argv);
return -1;
-}
+}
+\ No newline at end of file